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Subject: Re (2): last calling WebDAV mounting spec
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Hi,
after havin a look at the spec here my naive thoughts.
If I'm overlooking something just flame me :-)
As I understand it the idea is to tell a webbrowser that an URL it got is
WebDAV or even DeltaV capable.
But this is just meta information. Do why not something simple like:

GET /documents/user42/inbox HTTP/1.1
Host: www.example.com

Response:
HTTP/1.1 200 OK
Content-Type: what/ever; dav/deltav
Content-Length: xxx

The normal document for the browser ....
....

I hope you get the idea to give a hint in the header.
If what I'm proposing above would confuse a plain vanilla browser perhaps
there is another way.
This would tell the browser that it makes sense to open this URL with a
WebDAV client.
Because I think that much of the information in the dm: is redundant.
 
Chees, Edgar
--- start of oberon mail ---
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?KIYkLMYC;kM7jKM;MUkKIS020$





From w3c-dist-auth-request@frink.w3.org Sat Oct 01 08:08:54 2005
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edgar@edgarschwarz.de wrote:
> Hi,
> after havin a look at the spec here my naive thoughts.
> If I'm overlooking something just flame me :-)
> As I understand it the idea is to tell a webbrowser that an URL it got is
> WebDAV or even DeltaV capable.

Not just that. For instance, you may also want to initiate an "mount" 
request for a different URL. For instance, many document management 
systems use separate URL namespaces for HTML-based navigation, and 
HTTP/WebDAV access. Thus one level of indirection is needed anyway.

> But this is just meta information. Do why not something simple like:
> 
> GET /documents/user42/inbox HTTP/1.1
> Host: www.example.com
> 
> Response:
> HTTP/1.1 200 OK
> Content-Type: what/ever; dav/deltav
> Content-Length: xxx
> 
> The normal document for the browser ....
> ....
> 
> I hope you get the idea to give a hint in the header.
> If what I'm proposing above would confuse a plain vanilla browser perhaps
> there is another way.

Independant of the question whether it confuses browsers, how will it 
have any effect in existing browsers?

> This would tell the browser that it makes sense to open this URL with a
> WebDAV client.
> Because I think that much of the information in the dm: is redundant.

Such as?

Best regards, Julian





From w3c-dist-auth-request@frink.w3.org Sat Oct 01 15:42:55 2005
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Geoffrey M Clemm wrote:
> 
> I agree with Julian that the Depth infinity section of redirectref should
> be redefined based on this implementation experience.
> 
> Cheers,
> Geoff

OK, I finally got around reviewing the issue. I have changed the spec 
based on the principle of "least client astonishment", letting the 
behaviour default to "the right thing". That is, non redirect-aware 
clients will see no difference when applying LOCK, COPY, MOVE or DELETE 
to a collection that may contain redirects. (Our server currently obeys 
the Apply-To-Redirect-Ref header for COPY and MOVE, but I'm not aware of 
any use case depending on that, so I'll simply change the behaviour).

Not surprisingly, the spec has gotten quiet a bit shorter because of that.

Feedback appreciated -- I'd like to submit this as a revised draft 
addressing all WGLC comments before the cutoff date for the upcoming IETF.

Best regards, Julian

--

Link to issue for tracking: 
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-redirectref-protocol-issues.html#8.1_deep_lock_complexity>

Link to latest edits (includes change tracking): 
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-redirectref-protocol-latest.html>

Revised spec text (Section 8):

8.  Operations on Collections That Contain Redirect Reference Resources

    According to [RFC2518], Section 9.2, methods that have defined
    interactions with the "Depth" request header should apply all other
    request headers to each resource in scope.  However, applying this
    principle to the "Apply-To-Redirect-Ref" header uniformly would make
    it impractical to implement this specification on top of existing
    servers and also would result in unexpected server behaviour for
    clients that do not take the existence of redirect references into
    account.  On the other hand, the definition of the "Depth" header
    allows to explicitly define alternate behaviours.

    For this reason, this specification defines the interaction between
    "Depth" and "Apply-To-Redirect-Ref" request headers on a case-by-case
    basis, and also provides a default for methods not mentioned here
    that do not specify the behaviour themselves.

     +-------------+-----------------+------------------+-----------+
     | method name | defined in      | supported depths | behaviour |
     +-------------+-----------------+------------------+-----------+
     | COPY        | [RFC2518], 8.9  | 0, infinity      | "T"       |
     | DELETE      | [RFC2518], 8.7  | infinity         | "T"       |
     | LOCK        | [RFC2518], 8.11 | 0, infinity      | "T"       |
     | MOVE        | [RFC2518], 8.10 | 0, infinity      | "T"       |
     | PROPFIND    | [RFC2518], 8.2  | 0, 1, infinity   | inherit   |
     | REPORT      | [RFC3253], 3.6  | 0, 1, infinity   | inherit   |
     | default     |                 |                  | "T"       |
     +-------------+-----------------+------------------+-----------+

    When the behaviour is defined to be "inherit", the method should
    follow RFC2518's default behaviour for "Depth" operations, which
    means applying the value given for "Apply-To-Redirect-Ref" to each
    resource in scope.  On the other hand, when it is defined to be "T",
    the method should behave as if a "Apply-To-Redirect-Ref: T" header
    was specified for each operation on child resources.  The latter
    ensures that "Depth: infinity" operations will not fail unexpectedly
    just because there was a redirect reference resource in scope.

8.1  Example: PROPFIND on a Collection with Redirect Reference Resources

    Suppose a PROPFIND request with Depth: infinity is submitted to the
    following collection, with the members shown here:

    /MyCollection/
         (non-reference resource) diary.html
         (redirect reference resource) nunavut

    >> Request:

    PROPFIND /MyCollection/ HTTP/1.1
    Host: example.com
    Depth: infinity
    Apply-To-Redirect-Ref: F
    Content-Type: text/xml
    Content-Length: xxxx

    <?xml version="1.0" ?>
    <D:propfind xmlns:D="DAV: ">
      <D:prop xmlns:J="http://example.com/jsprops/">
        <D:resourcetype/>
        <J:keywords/>
      </D:prop>
    </D:propfind>

    >> Response:

    HTTP/1.1 207 Multi-Status
    Content-Type: text/xml
    Content-Length: xxxx

    <?xml version="1.0" ?>
    <D:multistatus xmlns:D="DAV:" xmlns:J="http://example.com/jsprops/">
      <D:response>
        <D:href>/MyCollection/</D:href>
        <D:propstat>
          <D:prop>
            <D:resourcetype><D:collection/></D:resourcetype>
            <J:keywords>diary, interests, hobbies</J:keywords>
          </D:prop>
          <D:status>HTTP/1.1 200 OK</D:status>
        </D:propstat>
      </D:response>
      <D:response>
        <D:href>/MyCollection/diary.html</D:href>
        <D:propstat>
          <D:prop>
            <D:resourcetype/>
            <J:keywords>diary, travel, family, history</J:keywords>
          </D:prop>
          <D:status>HTTP/1.1 200 OK</D:status>
        </D:propstat>
      </D:response>
      <D:response>
        <D:href>/MyCollection/nunavut</D:href>
        <D:status>HTTP/1.1 302 Found</D:status>
        <D:location>
          <D:href>http://example.ca/art/inuit/</D:href>
        </D:location>
      </D:response>
    </D:multistatus>

    In this example the Depth header is set to infinity, and the Apply-
    To-Redirect-Ref header is set to "F".  The collection contains one
    URI that identifies a redirect reference resource.  The response
    element for the redirect reference resource has a status of 302
    (Found), and includes a DAV:location extension element to allow
    clients to retrieve the properties of its target resource.  (The
    response element for the redirect reference resource does not include
    the requested properties.  The client can submit another PROPFIND
    request to the URI in the DAV:location pseudo-property to retrieve
    those properties.)

8.2  Example: PROPFIND with Apply-To-Redirect-Ref on a Collection with
      Redirect Reference Resources

    Suppose a PROPFIND request with "Apply-To-Redirect-Ref: T" and Depth:
    infinity is submitted to the following collection, with the members
    shown here:

    /MyCollection/
         (non-reference resource) diary.html
         (redirect reference resource) nunavut

    >> Request:

    PROPFIND /MyCollection/ HTTP/1.1
    Host: example.com
    Depth: infinity
    Apply-To-Redirect-Ref: T
    Content-Type: text/xml
    Content-Length: xxxx

    <?xml version="1.0" ?>
    <D:propfind xmlns:D="DAV:">
      <D:prop>
        <D:resourcetype/>
        <D:reftarget/>
        <D:redirect-lifetime/>
      </D:prop>
    </D:propfind>

    >> Response:

    HTTP/1.1 207 Multi-Status
    Content-Type: text/xml
    Content-Length: xxxx

    <?xml version="1.0" ?>
    <D:multistatus xmlns:D="DAV:">
      <D:response>
        <D:href>/MyCollection/</D:href>
        <D:propstat>
          <D:prop>
            <D:resourcetype><D:collection/></D:resourcetype>
          </D:prop>
          <D:status>HTTP/1.1 200 OK</D:status>
        </D:propstat>
        <D:propstat>
          <D:prop>
            <D:reftarget/>
            <D:redirect-lifetime/>
          </D:prop>
          <D:status>HTTP/1.1 404 Not Found</D:status>
        </D:propstat>
      </D:response>
      <D:response>
        <D:href>/MyCollection/diary.html</D:href>
        <D:propstat>
          <D:prop>
            <D:resourcetype/>
          </D:prop>
          <D:status>HTTP/1.1 200 OK</D:status>
        </D:propstat>
        <D:propstat>
          <D:prop>
            <D:reftarget/>
            <D:redirect-lifetime/>
          </D:prop>
          <D:status>HTTP/1.1 404 Not Found</D:status>
        </D:propstat>
      </D:response>
      <D:response>
        <D:href>/MyCollection/nunavut</D:href>
        <D:propstat>
          <D:prop>
            <D:resourcetype><D:redirectref/></D:resourcetype>
            <D:reftarget>
              <D:href>http://example.ca/art/inuit/</D:href>
            </D:reftarget>
            <D:redirect-lifetime><D:temporary/></D:redirect-lifetime>
          </D:prop>
        <D:status>HTTP/1.1 200 OK</D:status>
        </D:propstat>
      </D:response>
    </D:multistatus>

    Since the "Apply-To-Redirect-Ref: T" header is present, the response
    shows the properties of the redirect reference resource in the
    collection rather than reporting a 302 status.







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Vlazgra $3.3
Levirtra $3.3
Ciajlis $3.7
Imitrrex $16.4
Flommax $2.2
Ultrnam $0.78
Vioaxx $4.75
Ambrien $2.2
Valpium $0.97 
Xanamx $1.09
Soqma $3
Meriodia $2.2  



our site
http://decinopla.com/?GFSMKDRldRUFRHH1JGVllbRVF1WFdHUhteQFQ=

___
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Online Pharmaceuticals

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<html>
<body>
<strong>Vlabgra</strong> - $3.3
<br>
<strong>Leviwtra</strong> - $3.3<br>
<strong>Ciamlis</strong> - $3.7<br>
<strong>Imitcrex</strong> - $16.4<br>
<strong>Flomxax</strong> - $2.2<br>
<strong>Ultrqam</strong> - $0.78<br>
<strong>Vioyxx</strong> - $4.75
<br>
<strong>Ambaien</strong> - $2.2<br>
<strong>Valpium</strong> - $0.97 
<br>
<strong>Xanagx</strong> - $1.09<br>
<strong>Sozma</strong> - $3
<br>
<strong>Meriwdia</strong> - $2.2<br>
<br>  
<a href="http://decinopla.com/?GFSMKDRldRUFRHH1JGVllbRVF1WFdHUhteQFQ="><strong>our website</strong></a><br>
<br>
___
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Best regards,<br>
Online Pharmaceuticals
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=54

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 02:32 -------
Secion 6.7 in draft 07
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.6.7>).



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=64

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 02:39 -------
Fixed in 07.




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=56

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=58

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=59

julian.reschke@greenbytes.de changed:

           What    |Removed                     |Added
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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 02:58 -------
Now in section 8.11.5
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.8.11.5>)




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=60

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=61

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=62

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 03:03 -------
(RFC2396bis has been published as RFC3986)



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=63

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=65

julian.reschke@greenbytes.de changed:

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             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED



------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 03:06 -------
Fixed in 07.




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=66

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=68

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=69

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 03:13 -------
(appendix was removed in 07)




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=67

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=42

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=43

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=44

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=45

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=47

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=48

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=49

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=50

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=51

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=52

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From w3c-dist-auth-request@frink.w3.org Mon Oct 03 06:36:58 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=53

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=74

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 03:37 -------
Done in 07.




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=8

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=9

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 03:48 -------
Now in 4.3
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.4.3.p.4>)




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=10

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 03:50 -------
Now in 4.4
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.4.4.p.5>)




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julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 03:55 -------
(I honestly still don't understand what this section is trying to define)



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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 04:04 -------
Now in 8.2.3
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.8.2.3.p.5>)




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=20

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 04:11 -------
Section 9.5.1 uses the right scheme, but an syntactically invalid token. Section
9.5.2 still uses an undefined scheme.




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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 04:14 -------


*** This bug has been marked as a duplicate of 48 ***



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=48





------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 04:14 -------
*** Bug 21 has been marked as a duplicate of this bug. ***



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=22

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=24

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 04:21 -------
Now in 7.6
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.7.6.p.2>)




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=25

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 04:22 -------
Now in 7.6
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.7.6.p.3>)




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=26

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 04:46 -------
Update 07
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.8.2.p.11>).

Now says:

"Unless otherwise notified, clients may expect that the URL for the parent
collection in the PROPFIND response will be the same URL that was used to refer
to the parent collection in the PROPFIND request. Servers MAY use an alternate
URL for the parent collection in a PROPFIND response, but in this case the
server MUST include a Content-Location header whose value is the fully-qualified
URL used by the server to refer to the parent collection in this response."

I don't understand what this means, and what problem it is supposed to address.
As far as I can tell, clients will not be able to cope with the collection URL
(after normalization and resolution) being different from what the request URI
was (maybe except normalization of trailing "/").



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=27

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=28

julian.reschke@greenbytes.de changed:

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Subject: [Bug 29] refreshing locks
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=29

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 05:02 -------
Update -07, spec now says
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.8.11.1.p.1>):

"A lock is refreshed by sending a LOCK request without a body to a resource
within the scope of the lock. A LOCK request to refresh a lock must specify
which lock to refresh by using the Lock-Token header with a single lock token
(only one lock may be refreshed at a time). This request MUST NOT contain a
body, but it may contain a Timeout header. A server MAY accept the Timeout
header to change the duration remaining on the lock to the new value. A server
MUST ignore the Depth header on a LOCK refresh, and the client SHOULD NOT send
the Depth header on a LOCK refresh as the server will not convert the lock or
confirm the depth."

This can be stated much simpler; also the new client requirement on the Depth
header is new and unnecessary.

Just state:

"A lock is refreshed by sending a LOCK request without a request body to the URL
of a resource within the scope of the lock. This request MUST specify which lock
to refresh by using the 'Lock-Token' header with a single lock token (only one
lock may be refreshed at a time). It MAY contain a Timeout header, which a
server MAY accept to change the duration remaining on the lock to the new value.
A server MUST ignore the Depth header on a LOCK refresh."



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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 05:06 -------
*** Bug 33 has been marked as a duplicate of this bug. ***



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=33

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 05:06 -------


*** This bug has been marked as a duplicate of 51 ***



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=35

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=34

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=37

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=38

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 05:15 -------
RFC3986 has since been published.




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=39

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=40

julian.reschke@greenbytes.de changed:

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------- Additional Comments From julian.reschke@greenbytes.de  2005-10-03 05:18 -------
(for instance
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.8.4.p.2>).



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=41

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=72

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=73

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=80

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=79

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=85

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From w3c-dist-auth-request@frink.w3.org Mon Oct 03 08:41:05 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=88

           Summary: typo in list
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.8.11.5
        OS/Version: other
            Status: NEW
          Severity: trivial
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


Typo:

"h 400 (Bad Request), with 'request-uri-must-match-lock-token' precondition -
The LOCK request was made with a Lock-Token header, indicating that the client
wishes to refresh the given lock. However, the Request-URI did not fall within
the scope of the lock identified by the token. The lock may have a scope that
does not include the Request-URI, or the lock could have disappeared, or the
token may be invalid."



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From w3c-dist-auth-request@frink.w3.org Mon Oct 03 08:43:41 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=89

           Summary: whitespace introduced into hyphenated words
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: minor
          Priority: P2
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


There seem to be places in the XML source where whitespace was introduced inside
hyphenated terms, such as in "Coded- URLs".



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From w3c-dist-auth-request@frink.w3.org Mon Oct 03 08:44:03 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=87

           Summary: broken XML source of spec
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=5
                    4
        OS/Version: other
            Status: NEW
          Severity: trivial
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


Broken XML source (invalid list style "symbol")



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From w3c-dist-auth-request@frink.w3.org Mon Oct 03 08:46:06 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=90

           Summary: broken RFC2277 reference
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.18
        OS/Version: other
            Status: NEW
          Severity: minor
          Priority: P2
         Component: 18.  Internationalization Considerations
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


Broken reference to RFC2277
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.18>)

"<xref target="RFC2616">RFC2277</xref>".



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From w3c-dist-auth-request@frink.w3.org Mon Oct 03 11:34:57 2005
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OK.

I just went through my existing issues list, and reviewed the diffs to=20
the previous drafts:

- none of the issues that I have reported for draft 06 (and earlier=20
drafts) have been addressed (I have updated BugZilla accordingly)

- draft 07 contains lots of changes that do not seem to be related to=20
any open issue, nor have been discussed over here

If we want to make RFC2518bis a success, changing the spec without=20
notice and prior discussion really should be avoided.

That being said, here are the new issues that I found (most but not all=20
related to changes between 06 and 07). As soon as we agree on a single=20
issue tracking, I'll resubmit them in whatever format needed.

Best regards,

Julian

--

07-E01, Section 8.11
http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D87

Broken XML source (invalid list style)

Draft:
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rf=
c.section.8.11>


07-E02, Section 8.11.5
http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D88

Typo:

"h 400 (Bad Request), with 'request-uri-must-match-lock-token'=20
precondition - The LOCK request was made with a Lock-Token header,=20
indicating that the client wishes to refresh the given lock. However,=20
the Request-URI did not fall within the scope of the lock identified by=20
the token. The lock may have a scope that does not include the=20
Request-URI, or the lock could have disappeared, or the token may be=20
invalid."

Draft:
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rf=
c.section.8.11.5>


07-E04, hyphenated words
http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D89

There seem to be places in the XML source where whitespace was=20
introduced inside hyphenated terms, such as in "Coded- URLs".


07-E05, RFC2277 ref is broken
http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D90

Broken reference to RFC2277=20
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#r=
fc.section.18>)

"<xref target=3D"RFC2616">RFC2277</xref>".


07-E06, lock tokens in examples

8.11.6:

"Note that the locktoken and lockroot href elements would not contain=20
any whitespace. The line return appearing in this document is only for=20
formatting."

I'd prefer to have the XML examples be valid. Such as:

         <D:locktoken>
           <D:href
 >opaquelocktoken:e71d4fae-5dec-22d6-fea5-00a0c91e6be4</D:href>
         </D:locktoken>

Draft:=20
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rf=
c.section.8.11.6>


07-E07, 8.7 DELETE vs LOCKs

The first sentence of the description of DELETE now says:

"Locks rooted on a resource MUST be destroyed in a successful DELETE of=20
that resource."

This is correct, but it's certainly not the right way to start the=20
description of DELETE.

<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rf=
c.section.8.7>


07-E08, 8.9 COPY

Newly states:

"The state of the resource to be copied is fixed at	the point the server=20
begins processing the COPY request."

Why this change, and what problem does it solve?

Draft:=20
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rf=
c.section.8.9>


07-E09, 8.9.3 COPY for Collection Resources

Now says:

"A COPY of depth infinity instructs that the collection resource=20
identified by the Request-URI is to be copied to the location identified=20
by the URI in the Destination header, and all its internal member=20
resources are to be copied to a location relative to it, recursively=20
through all levels of the collection hierarchy. Servers should of course=20
avoid infinite recursion, and can do so by copying the source resource=20
as it existed at the point where processing started."

The last sentence was added. I'm not sure why. Of course servers never=20
should run in an infinite loop, but that applies to all Depth-related=20
operations. I'm not sure why it's stated here, and furthermore I don't=20
understand what the suggested workaround is.

Draft:=20
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rf=
c.section.8.9.3.p.2>


07-E10, 8.9.4, COPY and the Overwrite Header

	 	 Interoperability testing has shown that some clients expect a=09
			collection COPY to actually do a merge if a destination collection=09
			exists. That behavior is appropriate for file system folders but not=09
			necessarily for other data objects modelled as collections. Thus,=09
			implementors are urged to comply with the standard language above,=09
			and leave clients to perform a manual merge if that's the expected=09
			behavior when copying a collection over another collection.

May be a useful remark, but I think it should either clearly marked as a=20
comment, or moved into an appendix (away from normative text)

Draft:=20
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rf=
c.section.8.9.4>


07-E11, 10.1 102 Processing

I note that =EEn draft 05, the "status-uri" response header was removed=20
(see <http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.9.7>),=20
but the "102 Processing" status was left in.

Either we have implementations and interoperability - then we need both=20
- or we should remove both.

Draft:=20
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rf=
c.section.10.1>=20















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This is a multi-part message in MIME format.
--------------030201060504080201040300
Content-Type: text/plain; charset=us-ascii; format=flowed
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We submitted CalDAV draft -08 to the IETF last Friday.
It is now available at the following URL:

http://www.ietf.org/internet-drafts/draft-dusseault-caldav-08.txt

We are planning to submit a new revision in a few weeks for
an informal Last-Call on the ietf-caldav, ietf-calsify and
w3c-dist-auth (WebDAV) mailing lists before we actually submit
it to the IESG.

Please review the draft and send us feedback/questions/comments.

Thanks,
Bernard

B.1.  Changes in -08

    a.  Removed statement that said that client SHOULD always request
        DAV:getetag in calendar REPORTs.

    b.  Removed redefiniton of DAV:response.

    c.  Removed XML elements CALDAV:calendar-data-only.

    d.  Removed resource type CALDAV:calendar-home.

    e.  Moved the CALDAV:calendar-data element in the DAV:prop element in
        requests, and in the DAV:propstat element in responses.

    f.  Further defined the request body of MKCALENDAR to allow clients
        to set properties at calendar collection creation time.

    g.  Renamed CALDAV:calendar-home-URL to CALDAV:calendar-home-set

    h.  Clarified the fact that calendar collections may only contain
        calendar object resources and ordinary collections.

    i.  Clarified that calendar REPORTs should only be applied to
        calendar object resources contained in calendar collections.

    j.  Changed the CALDAV:calendar-component-restriction-set and CALDAV:
        calendar-restriction properties to always be protected.

    k.  Changed to use existing postcondition DAV:needs-privileges
        instead of a new CALDAV:insufficient-privilege postcondition.

    l.  Added example for limit-recurrence-set.

    m.  Added example for expand-recurrence-set.

    n.  Moved CALDAV:calendar-address-set in the calendar-schedule draft
        and renamed it to CALDAV:calendar-user-address-set.

    o.  Added guidelines on attachments and alarms.

-------- Original Message --------
Subject: I-D ACTION:draft-dusseault-caldav-08.txt
Date: Mon, 03 Oct 2005 15:50:02 -0400
From: Internet-Drafts@ietf.org
Reply-To: internet-drafts@ietf.org
To: i-d-announce@ietf.org

A New Internet-Draft is available from the on-line Internet-Drafts 
directories.


	Title		: Calendaring Extensions to WebDAV (CalDAV)
	Author(s)	: L. Dusseault, et al.
	Filename	: draft-dusseault-caldav-08.txt
	Pages		: 75
	Date		: 2005-10-3
	
This document specifies a set of methods, headers, message bodies,
    properties, and reports that define calendar access extensions to the
    WebDAV protocol.  The new protocol elements are intended to make
    WebDAV-based calendaring and scheduling an interoperable standard
    that supports calendar access, calendar management, calendar sharing,
    and calendar publishing.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-dusseault-caldav-08.txt

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Internet-Drafts are also available by anonymous FTP. Login with the username
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I had a phone call with Elias, Julian, Geoffrey, Lisa, and Jim today to see
what we could all do to get things moving on 2518bis.

Elias kindly volunteered to collect all the know issues and put them in
bugzilla. He is going to tell us how he will mark in bugzilla two different
states. One state is when the WG agrees on general way to resolved the issue
but has not updated drafts yet or figured out exact text, and other state is
when the actual text has been put into the draft.

If people can send text to the list proposing the text they want put into
2518bis-07 to fix a given issue that would be great.

We are then going to have some conference calls to run through all the
issues - we know some will be easy and some will be hard. Initially we are
going to try and knock of the easy one quickly and figure out which ones are
hard and start an email thread on the list for the hard ones. If we come up
with a proposed text on the call, it will still be approved on the list. The
calls will help set a regular event to move the draft forward and will also
help us quickly figure out where we all agree and disagree. Hard issues that
need discussion will still be discussed on the list.

Julian is going to start a thread on one hard issue some time soon.

In general we are going to try and have the conference calls every Wednesday
at 10 AM pacific time. For next week, we need to have it at 10 am Thursday
(not Wednesday). These times seems as good as any but if there is huge list
feedback that we need to pick a different time, I will move them. Thank you
Julian for staying up late for us west coast guys. I will send out
conference bridge information for these calls.

Elias will send out a list of the bugs we hope to cover in a given meeting.

Cullen




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The goal of the call is to do triage on the 2518bis-07 issues.

If you plan to join the conference call next Thursday, please drop me an
email so I make sure there are enough ports reserved.

Date/Time:              October 13, 2005 at 10:00 AM America/Los_Angeles
Length:                 60 minutes
Frequency:              once
Meeting ID:             251807
Description:            <None>
Phone Numbers:          1-866-MEETME9 (US Toll-free)
                        1-650-260-9030 (Local/International)

For Cisco MeetingPlace Help Desk assistance, please call: 866-631-5313 (US
Toll-free) or 408-450-7637 (Local/International) or email
mailto:at.help@meetingplace.net.

 




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From: Cullen Jennings <fluffy@cisco.com>
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I have scheduled a weekly conference call to help get 2519bis done. It is
primarily for people contributing text to that but anyone is welcome. The
goal of the call is to do triage and resolve 2518bis-07 issues.

If you plan to regularly join the conference call next, please drop me an
email so I make sure there are enough ports reserved.

Note the first call is Oct 19, then weekly after that.

Date/Time:              October 19, 2005 at 10:00 AM America/Los_Angeles
Length:                 60 minutes
Frequency:              This meeting is scheduled to occur every Wednesday
for 10 weeks. 
Meeting ID:             251807
Meeting Password:  
Description:            <None>
Phone Numbers:  1-866-MEETME9 (US Toll-free)
                        1-650-260-9030 (Local/International)

For Cisco MeetingPlace Help Desk assistance, please call: 866-631-5313 (US
Toll-free) or 408-450-7637 (Local/International) or email
mailto:at.help@meetingplace.net.

 




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Thanks, Cullen.

For those who can use ics-over-http (such as with iCal or Mozilla 
Calendar), here's a calendar file:

	<http://greenbytes.de/tech/webdav/webdav.ics>

Best regards, Julian




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hi all,

I am new to this group.

Can some help me with some ideas for research on
wbedav.


David.



		
___________________________________________________________ 
To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre. http://uk.security.yahoo.com




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--Apple-Mail-1--99459953
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Yes.

What did you have in mind?

- Jim

On Oct 5, 2005, at 6:04 AM, david muller wrote:

>
> hi all,
>
> I am new to this group.
>
> Can some help me with some ideas for research on
> wbedav.
>
>
> David.


--Apple-Mail-1--99459953
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<HTML><BODY style=3D"word-wrap: break-word; -khtml-nbsp-mode: space; =
-khtml-line-break: after-white-space; "><DIV>Yes.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>What did you have in =
mind?</DIV><DIV><BR class=3D"khtml-block-placeholder"></DIV><DIV>- =
Jim</DIV><BR><DIV><DIV>On Oct 5, 2005, at 6:04 AM, david muller =
wrote:</DIV><BR class=3D"Apple-interchange-newline"><BLOCKQUOTE =
type=3D"cite"><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">hi all,</DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: =
14px; "><BR></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">I am new to this =
group.</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
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on</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: =
0px; margin-left: 0px; ">wbedav.</DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: =
14px; "><BR></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">David.</DIV></BLOCKQUOTE></DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></BODY></HTML>=

--Apple-Mail-1--99459953--




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Cullen Jennings wrote:
> ...
> Julian is going to start a thread on one hard issue some time soon.
> ...


OK, here we go. I'd like to discuss the following issue...:

<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D10>

which reads..:

-- start --

4.5: =93The value of a property appears inside the property name element.
    The value may be any text, including valid XML.  When the value is
structured as XML, namespaces that are in scope for that part of the
XML document apply within the property value as well, and MUST be
preserved in server storage for retransmission later. Namespace prefixes
need not be preserved due to the rules of prefix declaration in XML.=94

1) I think this needs to rephrased to use proper XML terminology, also
2) I think that namespace prefixes within the property value do need to
be roundtripped.

Proposal:

=93The value of a property appears inside the property name element and
may be any kind of well-formed XML content, including both text-only and
mixed content. When the property value contains further XML elements,
namespaces and namespace prefixes that are in scope for that part of the
XML document apply within the property value as well, and MUST be
preserved in server storage for retransmission later.=94

Update draft -05/06:

Issue 2 still needs to be resolved, the current text says: "Namespace
prefixes need not be preserved due to the rules of prefix declaration in
XML. This is incorrect because namespace prefixes *are* significant for
certain XML vocabularies, such as XSLT and XML Schema. So independantly
of what we decide for WebDAV, we should add an accurate statement about
what that means for arbitrary XML content in properties.


(Now in 4.4
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#r=
fc.section.4.4.p.5>))

-- end --

Proposed solutions:

(i) stick with the stated behaviour, but fix the explanation that=20
misleadingly states that namespace prefixes are irrelevant,

or

(ii) state that namespace prefixes need to be preserved (such as in the=20
text proposed by myself).

Further thought: depending on what standards status we aim for, we=20
either need to think about what the protocol *should* be doing, or what=20
current implementations actually do today. As far as I can tell, IIS=20
doesn't preserve mixed content at all, while Apache/mod_dav does that=20
(however it doesn't preserve prefixes; but maybe this can easily be=20
fixed). I know that SAP Netweaver is preserving prefixes, and I=20
*suspect* that Xythos does this as well (to be tested).

Feedback appreciated,

Julian













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From: Cullen Jennings <fluffy@cisco.com>
To: Julian Reschke <julian.reschke@gmx.de>
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I'm not sure I understand what you mean by namespace preservation. Take the
example portion of some XML:

<h:html xmlns:xdc=3D"http://www.xml.com/books"
        xmlns:h=3D"http://www.w3.org/HTML/1998/html4">
 <h:head><h:title>Book Review</h:title></h:head>
 <h:body>
  <xdc:bookreview>
   <xdc:title>XML: A Primer</xdc:title>

Is it the "http://www.xml.com/books" that gets preserved or the "xdc". What
I'm trying to ask is if would be OK if the above XML got transformed to

<h:html xmlns:foo-xdc=3D"http://www.xml.com/books"
        xmlns:h=3D"http://www.w3.org/HTML/1998/html4">
 <h:head><h:title>Book Review</h:title></h:head>
 <h:body>
  <foo-xdc:bookreview>
   <foo-xdc:title>XML: A Primer</xdc:title>

I suspect you are saying this is not OK and the namespace prefix (ie the
xdc) needs to be preserved and not changed to foo-xdc. If this is what you
mean, then I am not sure what you mean by this is important for XSLT and XM=
L
Schema, can you provide a bit more of an example.

Thanks for educating me on this - I'm not really going to end up with much
of an opinion on any of this but I am making sure I know enough to at least
understand the argument. Also, I suspect I might not be the only one of the
list that does not understand as much about XML as I wish I did :-)

Cullen


On 10/5/05 11:42 AM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> Cullen Jennings wrote:
>> ...
>> Julian is going to start a thread on one hard issue some time soon.
>> ...
>=20
>=20
> OK, here we go. I'd like to discuss the following issue...:
>=20
> <http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D10>
>=20
> which reads..:
>=20
> -- start --
>=20
> 4.5: =B3The value of a property appears inside the property name element.
>     The value may be any text, including valid XML.  When the value is
> structured as XML, namespaces that are in scope for that part of the
> XML document apply within the property value as well, and MUST be
> preserved in server storage for retransmission later. Namespace prefixes
> need not be preserved due to the rules of prefix declaration in XML.=B2
>=20
> 1) I think this needs to rephrased to use proper XML terminology, also
> 2) I think that namespace prefixes within the property value do need to
> be roundtripped.
>=20
> Proposal:
>=20
> =B3The value of a property appears inside the property name element and
> may be any kind of well-formed XML content, including both text-only and
> mixed content. When the property value contains further XML elements,
> namespaces and namespace prefixes that are in scope for that part of the
> XML document apply within the property value as well, and MUST be
> preserved in server storage for retransmission later.=B2
>=20
> Update draft -05/06:
>=20
> Issue 2 still needs to be resolved, the current text says: "Namespace
> prefixes need not be preserved due to the rules of prefix declaration in
> XML. This is incorrect because namespace prefixes *are* significant for
> certain XML vocabularies, such as XSLT and XML Schema. So independantly
> of what we decide for WebDAV, we should add an accurate statement about
> what that means for arbitrary XML content in properties.
>=20
>=20
> (Now in 4.4
> (<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#r=
fc.se
> ction.4.4.p.5>))
>=20
> -- end --
>=20
> Proposed solutions:
>=20
> (i) stick with the stated behaviour, but fix the explanation that
> misleadingly states that namespace prefixes are irrelevant,
>=20
> or
>=20
> (ii) state that namespace prefixes need to be preserved (such as in the
> text proposed by myself).
>=20
> Further thought: depending on what standards status we aim for, we
> either need to think about what the protocol *should* be doing, or what
> current implementations actually do today. As far as I can tell, IIS
> doesn't preserve mixed content at all, while Apache/mod_dav does that
> (however it doesn't preserve prefixes; but maybe this can easily be
> fixed). I know that SAP Netweaver is preserving prefixes, and I
> *suspect* that Xythos does this as well (to be tested).
>=20
> Feedback appreciated,
>=20
> Julian
>=20
>=20
>=20
>=20
>=20
>=20




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Cc: WebDav <w3c-dist-auth@w3.org>, Cullen Jennings <fluffy@cisco.com>
From: Lisa Dusseault <lisa@osafoundation.org>
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IMPLEMENTORS -- can we get some sense of what existing server =20
implementations do to preserve prefixes/namespaces in property values?  =20=

If I recall correctly,  Xythos WFS preserves the namespaces but =20
generates its own prefixes, and will frequently declare prefixes in =20
another place.

so if a PROPPATCH contains
<D:prop xmlns:D=3D"DAV:">
   <c:myprop xmlns:c=3D"http://example.com/myclientnamespace">
     <x:value xmlns:x=3D"http://example.com/anothernamespace/">text in =20=

here</x:value>
  </c:myprop>
</D:prop>

a subsequent PROPFIND might return

<D:prop xmlns:D=3D"DAV:" =20
xmlns:ns-1=3D"http://example.com/myclientnamespace" =20
xmlns:ns-2=3Dhttp://example.com/anothernamespace/">
   <ns-1:myprop>
     <ns-2:value>text in here</ns-2:value>
  </ns-1:myprop>
</D:prop>

Lisa

On Oct 5, 2005, at 11:42 AM, Julian Reschke wrote:

>
> OK, here we go. I'd like to discuss the following issue...:
>
> <http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D10>
>
> which reads..:
>
> -- start --
>
> 4.5: =93The value of a property appears inside the property name =
element.
>    The value may be any text, including valid XML.  When the value is
> structured as XML, namespaces that are in scope for that part of the
> XML document apply within the property value as well, and MUST be
> preserved in server storage for retransmission later. Namespace =20
> prefixes
> need not be preserved due to the rules of prefix declaration in XML.=94
>
> 1) I think this needs to rephrased to use proper XML terminology, also
> 2) I think that namespace prefixes within the property value do need =
to
> be roundtripped.
>
> Proposal:
>
> =93The value of a property appears inside the property name element =
and
> may be any kind of well-formed XML content, including both text-only =20=

> and
> mixed content. When the property value contains further XML elements,
> namespaces and namespace prefixes that are in scope for that part of =20=

> the
> XML document apply within the property value as well, and MUST be
> preserved in server storage for retransmission later.=94
>
> Update draft -05/06:
>
> Issue 2 still needs to be resolved, the current text says: "Namespace
> prefixes need not be preserved due to the rules of prefix declaration =20=

> in
> XML. This is incorrect because namespace prefixes *are* significant =
for
> certain XML vocabularies, such as XSLT and XML Schema. So =
independantly
> of what we decide for WebDAV, we should add an accurate statement =
about
> what that means for arbitrary XML content in properties.
>
>
> (Now in 4.4
> (<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis=20
> -07.html#rfc.section.4.4.p.5>))
>
> -- end --
>
> Proposed solutions:
>
> (i) stick with the stated behaviour, but fix the explanation that =20
> misleadingly states that namespace prefixes are irrelevant,
>
> or
>
> (ii) state that namespace prefixes need to be preserved (such as in =20=

> the text proposed by myself).
>
> Further thought: depending on what standards status we aim for, we =20
> either need to think about what the protocol *should* be doing, or =20
> what current implementations actually do today. As far as I can tell, =20=

> IIS doesn't preserve mixed content at all, while Apache/mod_dav does =20=

> that (however it doesn't preserve prefixes; but maybe this can easily =20=

> be fixed). I know that SAP Netweaver is preserving prefixes, and I =20
> *suspect* that Xythos does this as well (to be tested).
>
> Feedback appreciated,
>
> Julian
>
>
>
>
>
>
>
>
>
>





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Date: Wed, 5 Oct 2005 20:56:18 +0100 (BST)
From: david muller <david_muller_8888@yahoo.co.uk>
To: Jim Whitehead <ejw@soe.ucsc.edu>
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hi,
 
what I have in mind is this.
 
I want to basically research upon some idea which exploits the advantages of webdav protocol  over HTTP1.1 to the advantage of some existing problem or for efficiency. 
 
Like say some idea which makes use of the extra methods provided by webdav namely ( e.g profind, propatch, copy, move, delete, lock, unlock) and then aims to solve some existing problem in the computer world today or intends to make some existing process or methodology being curently followed much more efficient.
 
Also I want it to be a real great researchable idea which would require considerable effor on my part to materilaise it. I would like to do a PHD in this.
 
One small idea which I have in mind right now is to develop a Framework For Sending RDF Documents using the WebDAV protocol as transport protocol. But I am not sure if its a real great idea and also its its big enough to do phd upon.

Thanks in anticipation,
 
Regards.
 


Jim Whitehead <ejw@soe.ucsc.edu> wrote:
Yes.


What did you have in mind?


- Jim

On Oct 5, 2005, at 6:04 AM, david muller wrote:



hi all,


I am new to this group.


Can some help me with some ideas for research on
wbedav.




David.



		
---------------------------------
How much free photo storage do you get? Store your holiday snaps for FREE with Yahoo! Photos. Get Yahoo! Photos
--0-1011044054-1128542178=:27240
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<DIV>hi,</DIV>
<DIV>&nbsp;</DIV>
<DIV>what I have in mind is this.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I want to basically research upon some idea which exploits the advantages of webdav protocol&nbsp; over HTTP1.1 to the advantage of some existing problem or for efficiency. </DIV>
<DIV>&nbsp;</DIV>
<DIV>Like say some idea which makes use of the extra methods provided by webdav namely ( e.g profind, propatch, copy, move, delete, lock, unlock) and then aims to solve some existing problem in the computer world today or intends to make some existing process or methodology being curently followed much more efficient.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Also I want it to be a real great researchable idea which would require considerable effor on my part to materilaise it. I would like to do a PHD in this.</DIV>
<DIV>&nbsp;</DIV>
<DIV>One small idea which I have in mind right now is to develop a Framework For Sending RDF Documents using the WebDAV protocol as transport protocol. But I am not sure if its a real great idea and also its its big enough to do phd upon.</DIV>
<DIV><BR>Thanks in anticipation,</DIV>
<DIV>&nbsp;</DIV>
<DIV>Regards.</DIV>
<DIV>&nbsp;</DIV>
<DIV><BR><BR><B><I>Jim Whitehead &lt;ejw@soe.ucsc.edu&gt;</I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<DIV>Yes.</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>What did you have in mind?</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>- Jim</DIV><BR>
<DIV>
<DIV>On Oct 5, 2005, at 6:04 AM, david muller wrote:</DIV><BR class=Apple-interchange-newline>
<BLOCKQUOTE type="cite">
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">hi all,</DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">I am new to this group.</DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">Can some help me with some ideas for research on</DIV>
<DIV style="MARGIN: 0px">wbedav.</DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">David.</DIV></BLOCKQUOTE></DIV><FONT class=Apple-style-span color=#0000dd><BR class=khtml-block-placeholder></FONT></BLOCKQUOTE><p>
		<hr size=1><font face="Arial" size="2">How much free photo storage do you get? Store your holiday snaps for FREE with Yahoo! Photos. <a href="http://us.rd.yahoo.com/mail/uk/taglines/default/photos/*http://uk.photos.yahoo.com/"><b>Get Yahoo! 
Photos</b></a></font>
--0-1011044054-1128542178=:27240--




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--Apple-Mail-11--87415740
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   My DAV implementation (http://svn.red-bean.com/wsanchez/trunk/ 
TwistedDAV/) removes the property value element from the DOM in the  
request and creates a new XML document with that element as the new  
document's root element.  I let the PyXML engine render the new  
document and store the result in the property store for the resource.

   My intention is that when a client requests a property value, that  
the value sent back is semantically equal to the original. It is not  
character-for-character equal.  If you want that, don't send me XML,  
but escape your XML on the way in, and undo that on the way out.

   For example:

     <D:propertyupdate xmlns:D="DAV:" xmlns:A="http://apache.org/foo/">
     <D:set><D:prop><A:prop0><A:value0/></prop0></D:prop></D:set>
     </D:propertyupdate>

   May come back as:

     <D:multistatus xmlns:D="DAV:">
       <D:response>
         <D:href>/foo/</D:href>
         <D:propstat>
           <D:prop>
            <prop0 xmlns="http://apache.org/foo/"><value0/></prop0></ 
D:prop>
           </D:prop>
           <D:status>HTTP/1.1 200 OK</D:status>
         </D:propstat>
       </D:response>
     </D:multistatus>

   I just jiggered that by hand, so the XML may be error-prone, but I  
think the idea should get across.

   Personally, I found the whole notion of preserving XML semantics  
to be quite annoying; it basically means that all of my (dead)  
property storage has to be XML, or I have to tag them as to whether  
they are or aren't XML, but that's even more complexity.

   I'd prefer that XML not be allowed in property values at all.  If  
the values were always CDATA, then the server wouldn't ever have to  
do anything with them at all, which is far more appropriate, I  
think.  And you could always put XML in there escaped as CDATA and  
parse it when you get it back if you need to.  That would require you  
to do what Julian is expecting, which is to make XML in property  
values self-contained and eliminates any ambiguity about who is  
responsible for ensuring that (which I agree should be the client,  
but don't agree that the current spec says so).

     -wsv


On Oct 5, 2005, at 12:38 PM, Lisa Dusseault wrote:

> IMPLEMENTORS -- can we get some sense of what existing server  
> implementations do to preserve prefixes/namespaces in property  
> values?  If I recall correctly,  Xythos WFS preserves the  
> namespaces but generates its own prefixes, and will frequently  
> declare prefixes in another place.


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From: Jim Whitehead <ejw@soe.ucsc.edu>
Date: Wed, 5 Oct 2005 14:15:24 -0700
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Subject: Re: ideas for research on wbedav required
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Here are some thoughts on substantial research projects involving  
WebDAV.

* Photo transport protocol. The cost of 802.11x hardware is dropping  
rapidly, while the number of deployed 802.11x access points is  
increasing. Especially with VOIP gaining traction, it seems likely  
that widespread wireless networking access based on TCP/IP will soon  
be a reality. Given this background, it would be very useful for  
digital cameras to be able to automatically transfer their pictures  
from the camera to a remote server. WebDAV seems like a useful  
protocol to build upon for such a service, since it's well suited for  
synchronization, and has strong metadata facilities. The existing  
standard in this space, CPXe (http://www.i3a.org/) is focused on  
getting photos to photo finishing services for hardcopy. Many  
consumers want auto-download without being required to upload to a  
photo finishing service. Project: develop a standard for automatic  
photo upload from a camera via wireless networking.

* Identity management protocol. Many web sites require users to  
create an identify for that site, usually by creating a username/ 
password pair. Users interacting with multiple sites need to maintain  
multiple username/password pairs (or compromise security by using the  
same pair). It would be much more convenient to have a single signon  
capability. There are many existing efforts in this space (Passport,  
Liberty Alliance), with each effort having some concern over its  
degree of capture by one or more organizations or communities. Since  
identity management involves a fair amount of metadata management,  
WebDAV might be a good protocol to use as a starting point in  
crafting an identity management protocol, due to its strong support  
for metadata, and DeltaV versioning capabilities.. This issue can  
have significant impact on the cross-organization calendar scheduling  
problem (see CalDAV).

* Email transport protocol. Spam is killing SMTP. It would be nice to  
have a mail transport protocol that was point-to-point, and involved  
authentication or some form of expensive computation for people to  
write email to a remote inbox. An email message is a blog of content  
plus metadata, just like a WebDAV resource. WebDAV + ACLs might be an  
interesting starting point for creating an alternate to SMTP for mail  
transport.  WebDAV is already the third most popular email transport  
between mail server and mail client (MUA), since Hotmail and Outlook  
Express use WebDAV for mail transport. Note that this project might  
very well also involve a solution for identity management. For extra  
credit (and a shred of hope for adoption), ensure some form of  
interoperability with the existing SMTP-based email system (perhaps  
by putting all of this email into an "untrusted" or "unverified"  
folder).

RDF may very well be a useful technology in addressing the metadata  
aspects of these projects. Or it might not. Let the requirements  
drive your choice of technology, not vice-versa.

- Jim Whitehead
Assistant Professor
Computer Science
UC Santa Cruz




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Wilfredo S=E1nchez Vega wrote:
>   My DAV implementation (http://svn.red-bean.com/wsanchez/trunk/=20
> TwistedDAV/) removes the property value element from the DOM in the =20
> request and creates a new XML document with that element as the new =20
> document's root element.  I let the PyXML engine render the new =20
> document and store the result in the property store for the resource.
>=20
>   My intention is that when a client requests a property value, that =20
> the value sent back is semantically equal to the original. It is not =20
> character-for-character equal.  If you want that, don't send me XML, =20
> but escape your XML on the way in, and undo that on the way out.

So who decides what "semantically equal" means? Is it semantically equal=20
if it does a differing XML Infoset=20
(<http://www.w3.org/TR/xml-infoset/>)? I doubt so.

> ...

Best regards, Julian




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Cullen Jennings wrote:
> 
> I'm not sure I understand what you mean by namespace preservation. Take the
> example portion of some XML:
> 
> <h:html xmlns:xdc="http://www.xml.com/books"
>         xmlns:h="http://www.w3.org/HTML/1998/html4">
>  <h:head><h:title>Book Review</h:title></h:head>
>  <h:body>
>   <xdc:bookreview>
>    <xdc:title>XML: A Primer</xdc:title>
> 
> Is it the "http://www.xml.com/books" that gets preserved or the "xdc". What
> I'm trying to ask is if would be OK if the above XML got transformed to
> 
> <h:html xmlns:foo-xdc="http://www.xml.com/books"
>         xmlns:h="http://www.w3.org/HTML/1998/html4">
>  <h:head><h:title>Book Review</h:title></h:head>
>  <h:body>
>   <foo-xdc:bookreview>
>    <foo-xdc:title>XML: A Primer</xdc:title>
 >
 > I suspect you are saying this is not OK and the namespace prefix (ie the
 > xdc) needs to be preserved and not changed to foo-xdc. If this is 
what you
 > mean, then I am not sure what you mean by this is important for XSLT 
and XML
 > Schema, can you provide a bit more of an example.
 >

The namespace URI definitively needs to preserved, I don't think there's 
any question about that.

What this issue is about is whether if it's a problem to get

	<xyz:title xmlns:xyz="http://www.xml.com/books">XML: A Primer</xyz:title>

or

	<title xmlns="http://www.xml.com/books">XML: A Primer</title>

instead.

*Usually* that doesn't make a difference, and in a perfect world, it 
never would. Unfortunately, this isn't a perfect world and a long time 
ago, XML vocabularies have started to leak prefixes into text content 
and attribute values.

Consider:

	<xsl:template match="D:propfind" xmlns:D="DAV:">

In this case, loosing the "D" prefix actually breaks the semantics of 
the document, such as in:

	<xsl:template match="D:propfind" xmlns:ns0="DAV:">

This is an example from XSLT/XPath, similar cases can be constructed 
with documents that use XML Schema, such as in

	<count xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xs="http://www.w3.org/2001/XMLSchema" 
xsi:type="xs:integer">123</count>

For the record, the XML Infoset spec includes prefixes.

So no, rewriting namespace prefixes is *not* without problems, and 
*will* break semantics of XML content. Thus, we should either require 
prefixes to be preserved, or at least state that this part of the XML 
Infoset may not round-trip through WebDAV properties.

> Thanks for educating me on this - I'm not really going to end up with much
> of an opinion on any of this but I am making sure I know enough to at least
> understand the argument. Also, I suspect I might not be the only one of the
> list that does not understand as much about XML as I wish I did :-)

Sure :-)

Best regards, Julian





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This is a great argument for a from-scratch design, and I understand it 
and would agree with it were we starting from a clean slate.  However, 
we're not starting from a clean slate.

  * Existing clients have to handle servers that do prefix replacement.  
An existing client would not benefit from more stringent rules in 
RFC2518bis until most servers are upgraded and satisfy the new 
requirements.  (Yes I'm aware this is a general concern with spec 
changes but it should still factor into this trade-off calculation)
  * Existing servers probably don't preserve prefixes, by and large.  
Requiring so many existing implementations to change is quite a burden. 
  For some of them this will involve performance considerations.
  * I'm unaware of any actual interoperability problems that have arisen 
in ordinary usage that require prefix preservation.  The template 
example is certainly a theoretical problem I agree.

We might consider WSanchez's idea of recommending that clients create 
self-contained XML fragments  and escape with CDATA, if the client is 
concerned about prefix preservation.  Otherwise, unprotected XML 
fragments are subject to server rewriting (whitespace as well as prefix 
selection).  This seems like a more practical approach starting from 
where we are now, and I think it handles all the cases with less spec 
changes.

Lisa

On Oct 5, 2005, at 2:47 PM, Julian Reschke wrote:

>
> Cullen Jennings wrote:
>> I'm not sure I understand what you mean by namespace preservation. 
>> Take the
>> example portion of some XML:
>> <h:html xmlns:xdc="http://www.xml.com/books"
>>         xmlns:h="http://www.w3.org/HTML/1998/html4">
>>  <h:head><h:title>Book Review</h:title></h:head>
>>  <h:body>
>>   <xdc:bookreview>
>>    <xdc:title>XML: A Primer</xdc:title>
>> Is it the "http://www.xml.com/books" that gets preserved or the 
>> "xdc". What
>> I'm trying to ask is if would be OK if the above XML got transformed 
>> to
>> <h:html xmlns:foo-xdc="http://www.xml.com/books"
>>         xmlns:h="http://www.w3.org/HTML/1998/html4">
>>  <h:head><h:title>Book Review</h:title></h:head>
>>  <h:body>
>>   <foo-xdc:bookreview>
>>    <foo-xdc:title>XML: A Primer</xdc:title>
> >
> > I suspect you are saying this is not OK and the namespace prefix (ie 
> the
> > xdc) needs to be preserved and not changed to foo-xdc. If this is 
> what you
> > mean, then I am not sure what you mean by this is important for XSLT 
> and XML
> > Schema, can you provide a bit more of an example.
> >
>
> The namespace URI definitively needs to preserved, I don't think 
> there's any question about that.
>
> What this issue is about is whether if it's a problem to get
>
> 	<xyz:title xmlns:xyz="http://www.xml.com/books">XML: A 
> Primer</xyz:title>
>
> or
>
> 	<title xmlns="http://www.xml.com/books">XML: A Primer</title>
>
> instead.
>
> *Usually* that doesn't make a difference, and in a perfect world, it 
> never would. Unfortunately, this isn't a perfect world and a long time 
> ago, XML vocabularies have started to leak prefixes into text content 
> and attribute values.
>
> Consider:
>
> 	<xsl:template match="D:propfind" xmlns:D="DAV:">
>
> In this case, loosing the "D" prefix actually breaks the semantics of 
> the document, such as in:
>
> 	<xsl:template match="D:propfind" xmlns:ns0="DAV:">
>
> This is an example from XSLT/XPath, similar cases can be constructed 
> with documents that use XML Schema, such as in
>
> 	<count xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>    xmlns:xs="http://www.w3.org/2001/XMLSchema" 
> xsi:type="xs:integer">123</count>
>
> For the record, the XML Infoset spec includes prefixes.
>
> So no, rewriting namespace prefixes is *not* without problems, and 
> *will* break semantics of XML content. Thus, we should either require 
> prefixes to be preserved, or at least state that this part of the XML 
> Infoset may not round-trip through WebDAV properties.
>
>> Thanks for educating me on this - I'm not really going to end up with 
>> much
>> of an opinion on any of this but I am making sure I know enough to at 
>> least
>> understand the argument. Also, I suspect I might not be the only one 
>> of the
>> list that does not understand as much about XML as I wish I did :-)
>
> Sure :-)
>
> Best regards, Julian
>
>





From w3c-dist-auth-request@frink.w3.org Wed Oct 05 18:38:24 2005
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From: david muller <david_muller_8888@yahoo.co.uk>
To: Jim Whitehead <ejw@soe.ucsc.edu>
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Subject: Re: ideas for research on wbedav required
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Dear Sir,

thanks for your ideas. I had myself once vaguely
thought of the webdav email transport protocol long
back but could not get the clear thought that time. I
found it quite interesting and innovative. I will
concentrate on this idea for now and will look into
other ideas later.

Few poins:

1. What I could understand of the idea is "To Develop
a Mail Transport Protocol Based on WEBDAV (i.e which
uses the extra methods like copy, move, delete,
profind, propatch, lock, unlock provided by webdav).
". The protocol should be point to point, have
authentication, some sort of identity management.

2. You have said that WebDAV is already the third most
popular email transport  between mail server and mail
client (MUA ?), since Hotmail and Outlook Express use
WebDAV for mail transport. So does it mean that
hotmail and outlook have already developed a transport
protocol based on WEBDAV and are using it?

3. Would one of the major intention behind this new
transport protocol be to stop SPAM (you have said that
SPAM is killing SMTP)? If yes then I really did not
understand that why you think that point to point
transport protocol would not have spam problem.


Thanks for your time,
Regards.




> * Email transport protocol. Spam is killing SMTP. It
> would be nice to have a mail transport protocol that
was > point-to-point, and involved  
> authentication or some form of expensive computation
> for people to  
> write email to a remote inbox. An email message is a
> blog of content  
> plus metadata, just like a WebDAV resource. WebDAV +
> ACLs might be an  
> interesting starting point for creating an alternate
> to SMTP for mail  
> transport.  WebDAV is already the third most popular
> email transport  
> between mail server and mail client (MUA), since
> Hotmail and Outlook  
> Express use WebDAV for mail transport. Note that
> this project might  
> very well also involve a solution for identity
> management. For extra  
> credit (and a shred of hope for adoption), ensure
> some form of  
> interoperability with the existing SMTP-based email
> system (perhaps  
> by putting all of this email into an "untrusted" or
> "unverified"  
> folder)


		
___________________________________________________________ 
To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre. http://uk.security.yahoo.com




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This is a multipart message in MIME format.
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Julian's argument was:
> Thus, we should either require 
> prefixes to be preserved, or at least state that this part of the XML 
> Infoset may not round-trip through WebDAV properties.

It appears that Lisa and Wilfredo do not like the first alternative, so
let's explore the second alternative.  I believe Julian is just saying 
here
that the specification should warn clients and servers about the negative
consequences of not round-tripping namespace prefixes (so that clients are
prepared to handle the negative consequences).  Does anyone object to this
being added?  If not, Julian, could you write up what you'd like to be 
said
here (I assume it would be something like what you say below)?  Also, one
could add guidance to a client that they escape the XML if they are 
concerned
about the non-round-tripping of namespace prefixes.

Cheers,
Geoff

Lisa wrote on 10/05/2005 06:12:52 PM:
> 
> This is a great argument for a from-scratch design, and I understand it 
> and would agree with it were we starting from a clean slate.  However, 
> we're not starting from a clean slate.
> 
>   * Existing clients have to handle servers that do prefix replacement. 
> An existing client would not benefit from more stringent rules in 
> RFC2518bis until most servers are upgraded and satisfy the new 
> requirements.  (Yes I'm aware this is a general concern with spec 
> changes but it should still factor into this trade-off calculation)
>   * Existing servers probably don't preserve prefixes, by and large. 
> Requiring so many existing implementations to change is quite a burden. 
>   For some of them this will involve performance considerations.
>   * I'm unaware of any actual interoperability problems that have arisen 

> in ordinary usage that require prefix preservation.  The template 
> example is certainly a theoretical problem I agree.
> 
> We might consider WSanchez's idea of recommending that clients create 
> self-contained XML fragments  and escape with CDATA, if the client is 
> concerned about prefix preservation.  Otherwise, unprotected XML 
> fragments are subject to server rewriting (whitespace as well as prefix 
> selection).  This seems like a more practical approach starting from 
> where we are now, and I think it handles all the cases with less spec 
> changes.
> 
> On Oct 5, 2005, at 2:47 PM, Julian Reschke wrote:
> 
> >
> > Cullen Jennings wrote:
> >> I'm not sure I understand what you mean by namespace preservation. 
> >> Take the
> >> example portion of some XML:
> >> <h:html xmlns:xdc="http://www.xml.com/books"
> >>         xmlns:h="http://www.w3.org/HTML/1998/html4">
> >>  <h:head><h:title>Book Review</h:title></h:head>
> >>  <h:body>
> >>   <xdc:bookreview>
> >>    <xdc:title>XML: A Primer</xdc:title>
> >> Is it the "http://www.xml.com/books" that gets preserved or the 
> >> "xdc". What
> >> I'm trying to ask is if would be OK if the above XML got transformed 
> >> to
> >> <h:html xmlns:foo-xdc="http://www.xml.com/books"
> >>         xmlns:h="http://www.w3.org/HTML/1998/html4">
> >>  <h:head><h:title>Book Review</h:title></h:head>
> >>  <h:body>
> >>   <foo-xdc:bookreview>
> >>    <foo-xdc:title>XML: A Primer</xdc:title>
> > >
> > > I suspect you are saying this is not OK and the namespace prefix (ie 

> > the
> > > xdc) needs to be preserved and not changed to foo-xdc. If this is 
> > what you
> > > mean, then I am not sure what you mean by this is important for XSLT 

> > and XML
> > > Schema, can you provide a bit more of an example.
> > >
> >
> > The namespace URI definitively needs to preserved, I don't think 
> > there's any question about that.
> >
> > What this issue is about is whether if it's a problem to get
> >
> >    <xyz:title xmlns:xyz="http://www.xml.com/books">XML: A 
> > Primer</xyz:title>
> >
> > or
> >
> >    <title xmlns="http://www.xml.com/books">XML: A Primer</title>
> >
> > instead.
> >
> > *Usually* that doesn't make a difference, and in a perfect world, it 
> > never would. Unfortunately, this isn't a perfect world and a long time 

> > ago, XML vocabularies have started to leak prefixes into text content 
> > and attribute values.
> >
> > Consider:
> >
> >    <xsl:template match="D:propfind" xmlns:D="DAV:">
> >
> > In this case, loosing the "D" prefix actually breaks the semantics of 
> > the document, such as in:
> >
> >    <xsl:template match="D:propfind" xmlns:ns0="DAV:">
> >
> > This is an example from XSLT/XPath, similar cases can be constructed 
> > with documents that use XML Schema, such as in
> >
> >    <count xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> >    xmlns:xs="http://www.w3.org/2001/XMLSchema" 
> > xsi:type="xs:integer">123</count>
> >
> > For the record, the XML Infoset spec includes prefixes.
> >
> > So no, rewriting namespace prefixes is *not* without problems, and 
> > *will* break semantics of XML content. Thus, we should either require 
> > prefixes to be preserved, or at least state that this part of the XML 
> > Infoset may not round-trip through WebDAV properties.
> >
> >> Thanks for educating me on this - I'm not really going to end up with 

> >> much
> >> of an opinion on any of this but I am making sure I know enough to at 

> >> least
> >> understand the argument. Also, I suspect I might not be the only one 
> >> of the
> >> list that does not understand as much about XML as I wish I did :-)
> >
> > Sure :-)
> >
> > Best regards, Julian
> >
> >
> 
> 

--=_alternative 0001F4C885257092_=
Content-Type: text/html; charset="US-ASCII"


<br><font size=2><tt>Julian's argument was:</tt></font>
<br><font size=2><tt>&gt; Thus, we should either require <br>
&gt; prefixes to be preserved, or at least state that this part of the
XML <br>
&gt; Infoset may not round-trip through WebDAV properties.</tt></font>
<br>
<br><font size=2><tt>It appears that Lisa and Wilfredo do not like the
first alternative, so</tt></font>
<br><font size=2><tt>let's explore the second alternative. &nbsp;I believe
Julian is just saying here</tt></font>
<br><font size=2><tt>that the specification should warn clients and servers
about the negative</tt></font>
<br><font size=2><tt>consequences of not round-tripping namespace prefixes
(so that clients are</tt></font>
<br><font size=2><tt>prepared to handle the negative consequences). &nbsp;Does
anyone object to this</tt></font>
<br><font size=2><tt>being added? &nbsp;If not, Julian, could you write
up what you'd like to be said</tt></font>
<br><font size=2><tt>here (I assume it would be something like what you
say below)? &nbsp;Also, one</tt></font>
<br><font size=2><tt>could add guidance to a client that they escape the
XML if they are concerned</tt></font>
<br><font size=2><tt>about the non-round-tripping of namespace prefixes.</tt></font>
<br><font size=2><tt><br>
Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br><font size=2><tt>Lisa wrote on 10/05/2005 06:12:52 PM:<br>
&gt; <br>
&gt; This is a great argument for a from-scratch design, and I understand
it <br>
&gt; and would agree with it were we starting from a clean slate. &nbsp;However,
<br>
&gt; we're not starting from a clean slate.<br>
&gt; <br>
&gt; &nbsp; * Existing clients have to handle servers that do prefix replacement.
&nbsp;<br>
&gt; An existing client would not benefit from more stringent rules in
<br>
&gt; RFC2518bis until most servers are upgraded and satisfy the new <br>
&gt; requirements. &nbsp;(Yes I'm aware this is a general concern with
spec <br>
&gt; changes but it should still factor into this trade-off calculation)<br>
&gt; &nbsp; * Existing servers probably don't preserve prefixes, by and
large. &nbsp;<br>
&gt; Requiring so many existing implementations to change is quite a burden.
<br>
&gt; &nbsp; For some of them this will involve performance considerations.<br>
&gt; &nbsp; * I'm unaware of any actual interoperability problems that
have arisen <br>
&gt; in ordinary usage that require prefix preservation. &nbsp;The template
<br>
&gt; example is certainly a theoretical problem I agree.<br>
&gt; <br>
&gt; We might consider WSanchez's idea of recommending that clients create
<br>
&gt; self-contained XML fragments &nbsp;and escape with CDATA, if the client
is <br>
&gt; concerned about prefix preservation. &nbsp;Otherwise, unprotected
XML <br>
&gt; fragments are subject to server rewriting (whitespace as well as prefix
<br>
&gt; selection). &nbsp;This seems like a more practical approach starting
from <br>
&gt; where we are now, and I think it handles all the cases with less spec
<br>
&gt; changes.<br>
&gt; <br>
&gt; On Oct 5, 2005, at 2:47 PM, Julian Reschke wrote:<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Cullen Jennings wrote:<br>
&gt; &gt;&gt; I'm not sure I understand what you mean by namespace preservation.
<br>
&gt; &gt;&gt; Take the<br>
&gt; &gt;&gt; example portion of some XML:<br>
&gt; &gt;&gt; &lt;h:html xmlns:xdc=&quot;http://www.xml.com/books&quot;<br>
&gt; &gt;&gt; &nbsp; &nbsp; &nbsp; &nbsp; xmlns:h=&quot;http://www.w3.org/HTML/1998/html4&quot;&gt;<br>
&gt; &gt;&gt; &nbsp;&lt;h:head&gt;&lt;h:title&gt;Book Review&lt;/h:title&gt;&lt;/h:head&gt;<br>
&gt; &gt;&gt; &nbsp;&lt;h:body&gt;<br>
&gt; &gt;&gt; &nbsp; &lt;xdc:bookreview&gt;<br>
&gt; &gt;&gt; &nbsp; &nbsp;&lt;xdc:title&gt;XML: A Primer&lt;/xdc:title&gt;<br>
&gt; &gt;&gt; Is it the &quot;http://www.xml.com/books&quot; that gets
preserved or the <br>
&gt; &gt;&gt; &quot;xdc&quot;. What<br>
&gt; &gt;&gt; I'm trying to ask is if would be OK if the above XML got
transformed <br>
&gt; &gt;&gt; to<br>
&gt; &gt;&gt; &lt;h:html xmlns:foo-xdc=&quot;http://www.xml.com/books&quot;<br>
&gt; &gt;&gt; &nbsp; &nbsp; &nbsp; &nbsp; xmlns:h=&quot;http://www.w3.org/HTML/1998/html4&quot;&gt;<br>
&gt; &gt;&gt; &nbsp;&lt;h:head&gt;&lt;h:title&gt;Book Review&lt;/h:title&gt;&lt;/h:head&gt;<br>
&gt; &gt;&gt; &nbsp;&lt;h:body&gt;<br>
&gt; &gt;&gt; &nbsp; &lt;foo-xdc:bookreview&gt;<br>
&gt; &gt;&gt; &nbsp; &nbsp;&lt;foo-xdc:title&gt;XML: A Primer&lt;/xdc:title&gt;<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; I suspect you are saying this is not OK and the namespace
prefix (ie <br>
&gt; &gt; the<br>
&gt; &gt; &gt; xdc) needs to be preserved and not changed to foo-xdc. If
this is <br>
&gt; &gt; what you<br>
&gt; &gt; &gt; mean, then I am not sure what you mean by this is important
for XSLT <br>
&gt; &gt; and XML<br>
&gt; &gt; &gt; Schema, can you provide a bit more of an example.<br>
&gt; &gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; The namespace URI definitively needs to preserved, I don't think
<br>
&gt; &gt; there's any question about that.<br>
&gt; &gt;<br>
&gt; &gt; What this issue is about is whether if it's a problem to get<br>
&gt; &gt;<br>
&gt; &gt; &nbsp; &nbsp;&lt;xyz:title xmlns:xyz=&quot;http://www.xml.com/books&quot;&gt;XML:
A <br>
&gt; &gt; Primer&lt;/xyz:title&gt;<br>
&gt; &gt;<br>
&gt; &gt; or<br>
&gt; &gt;<br>
&gt; &gt; &nbsp; &nbsp;&lt;title xmlns=&quot;http://www.xml.com/books&quot;&gt;XML:
A Primer&lt;/title&gt;<br>
&gt; &gt;<br>
&gt; &gt; instead.<br>
&gt; &gt;<br>
&gt; &gt; *Usually* that doesn't make a difference, and in a perfect world,
it <br>
&gt; &gt; never would. Unfortunately, this isn't a perfect world and a
long time <br>
&gt; &gt; ago, XML vocabularies have started to leak prefixes into text
content <br>
&gt; &gt; and attribute values.<br>
&gt; &gt;<br>
&gt; &gt; Consider:<br>
&gt; &gt;<br>
&gt; &gt; &nbsp; &nbsp;&lt;xsl:template match=&quot;D:propfind&quot; xmlns:D=&quot;DAV:&quot;&gt;<br>
&gt; &gt;<br>
&gt; &gt; In this case, loosing the &quot;D&quot; prefix actually breaks
the semantics of <br>
&gt; &gt; the document, such as in:<br>
&gt; &gt;<br>
&gt; &gt; &nbsp; &nbsp;&lt;xsl:template match=&quot;D:propfind&quot; xmlns:ns0=&quot;DAV:&quot;&gt;<br>
&gt; &gt;<br>
&gt; &gt; This is an example from XSLT/XPath, similar cases can be constructed
<br>
&gt; &gt; with documents that use XML Schema, such as in<br>
&gt; &gt;<br>
&gt; &gt; &nbsp; &nbsp;&lt;count xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;<br>
&gt; &gt; &nbsp; &nbsp;xmlns:xs=&quot;http://www.w3.org/2001/XMLSchema&quot;
<br>
&gt; &gt; xsi:type=&quot;xs:integer&quot;&gt;123&lt;/count&gt;<br>
&gt; &gt;<br>
&gt; &gt; For the record, the XML Infoset spec includes prefixes.<br>
&gt; &gt;<br>
&gt; &gt; So no, rewriting namespace prefixes is *not* without problems,
and <br>
&gt; &gt; *will* break semantics of XML content. Thus, we should either
require <br>
&gt; &gt; prefixes to be preserved, or at least state that this part of
the XML <br>
&gt; &gt; Infoset may not round-trip through WebDAV properties.<br>
&gt; &gt;<br>
&gt; &gt;&gt; Thanks for educating me on this - I'm not really going to
end up with <br>
&gt; &gt;&gt; much<br>
&gt; &gt;&gt; of an opinion on any of this but I am making sure I know
enough to at <br>
&gt; &gt;&gt; least<br>
&gt; &gt;&gt; understand the argument. Also, I suspect I might not be the
only one <br>
&gt; &gt;&gt; of the<br>
&gt; &gt;&gt; list that does not understand as much about XML as I wish
I did :-)<br>
&gt; &gt;<br>
&gt; &gt; Sure :-)<br>
&gt; &gt;<br>
&gt; &gt; Best regards, Julian<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; <br>
&gt; <br>
</tt></font>
--=_alternative 0001F4C885257092_=--




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   Honestly, I don't really know, 'cuz I'm not an XML guy.  But this  
is exactly why:

     A) XML isn't nearly as easy as it's hyped up to be
     B) We shouldn't allow XML elements in property values

     -wsv

On Oct 5, 2005, at 2:50 PM, Julian Reschke wrote:

> So who decides what "semantically equal" means? Is it semantically  
> equal if it does a differing XML Infoset (<http://www.w3.org/TR/xml- 
> infoset/>)? I doubt so.
>


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That works for me, unless more feedback from implementors comes up=20
quite different.

Based on Julian's rewriting plus the discussion so far, here's some=20
proposed wording:

The value of a property appears inside the property name element. The=20
value
can be any kind of well-formed XML content: element content, text or=20
mixed
content. When the property value contains element or mixed content,
namespaces that are in scope for that part of the XML document apply=20
within
the property value as well, and servers MUST preserve namespaces in=20
server
storage for retransmission later.  The server MAY preserve namespace=20
prefixes
and non-significant whitespace.

For any values where specific prefix choices or whitespace matter (e.g.=20=

property
values containing XPath with prefixes), clients might need to force the=20=

server to
store the exact property value by encapsulating the value in a CDATA=20
section.

Lisa


On Oct 5, 2005, at 5:21 PM, Geoffrey M Clemm wrote:

>
> Julian's argument was:
> > Thus, we should either require
>  > prefixes to be preserved, or at least state that this part of the=20=

> XML
>  > Infoset may not round-trip through WebDAV properties.
>
> It appears that Lisa and Wilfredo do not like the first alternative, =
so
> let's explore the second alternative. =A0I believe Julian is just =
saying=20
> here
> that the specification should warn clients and servers about the=20
> negative
> consequences of not round-tripping namespace prefixes (so that clients=20=

> are
> prepared to handle the negative consequences). =A0Does anyone object =
to=20
> this
> being added? =A0If not, Julian, could you write up what you'd like to =
be=20
> said
> here (I assume it would be something like what you say below)? =A0Also,=20=

> one
> could add guidance to a client that they escape the XML if they are=20
> concerned
> about the non-round-tripping of namespace prefixes.
>
>  Cheers,
> Geoff
>
> Lisa wrote on 10/05/2005 06:12:52 PM:
>  >
>  > This is a great argument for a from-scratch design, and I=20
> understand it
>  > and would agree with it were we starting from a clean slate.=20
> =A0However,
>  > we're not starting from a clean slate.
>  >
>  > =A0 * Existing clients have to handle servers that do prefix=20
> replacement. =A0
>  > An existing client would not benefit from more stringent rules in
>  > RFC2518bis until most servers are upgraded and satisfy the new
>  > requirements. =A0(Yes I'm aware this is a general concern with spec
>  > changes but it should still factor into this trade-off calculation)
>  > =A0 * Existing servers probably don't preserve prefixes, by and=20
> large. =A0
>  > Requiring so many existing implementations to change is quite a=20
> burden.
>  > =A0 For some of them this will involve performance considerations.
>  > =A0 * I'm unaware of any actual interoperability problems that have=20=

> arisen
>  > in ordinary usage that require prefix preservation. =A0The template
>  > example is certainly a theoretical problem I agree.
>  >
>  > We might consider WSanchez's idea of recommending that clients=20
> create
>  > self-contained XML fragments =A0and escape with CDATA, if the =
client=20
> is
>  > concerned about prefix preservation. =A0Otherwise, unprotected XML
>  > fragments are subject to server rewriting (whitespace as well as=20
> prefix
>  > selection). =A0This seems like a more practical approach starting =
from
>  > where we are now, and I think it handles all the cases with less=20
> spec
>  > changes.
>  >
>  > On Oct 5, 2005, at 2:47 PM, Julian Reschke wrote:
>  >
>  > >
>  > > Cullen Jennings wrote:
>  > >> I'm not sure I understand what you mean by namespace=20
> preservation.
>  > >> Take the
>  > >> example portion of some XML:
>  > >> <h:html xmlns:xdc=3D"http://www.xml.com/books"
>  > >> =A0 =A0 =A0 =A0 xmlns:h=3D"http://www.w3.org/HTML/1998/html4">
>  > >> =A0<h:head><h:title>Book Review</h:title></h:head>
>  > >> =A0<h:body>
>  > >> =A0 <xdc:bookreview>
>  > >> =A0 =A0<xdc:title>XML: A Primer</xdc:title>
>  > >> Is it the "http://www.xml.com/books" that gets preserved or the
>  > >> "xdc". What
>  > >> I'm trying to ask is if would be OK if the above XML got=20
> transformed
>  > >> to
>  > >> <h:html xmlns:foo-xdc=3D"http://www.xml.com/books"
>  > >> =A0 =A0 =A0 =A0 xmlns:h=3D"http://www.w3.org/HTML/1998/html4">
>  > >> =A0<h:head><h:title>Book Review</h:title></h:head>
>  > >> =A0<h:body>
>  > >> =A0 <foo-xdc:bookreview>
>  > >> =A0 =A0<foo-xdc:title>XML: A Primer</xdc:title>
>  > > >
>  > > > I suspect you are saying this is not OK and the namespace=20
> prefix (ie
>  > > the
>  > > > xdc) needs to be preserved and not changed to foo-xdc. If this=20=

> is
>  > > what you
>  > > > mean, then I am not sure what you mean by this is important for=20=

> XSLT
>  > > and XML
>  > > > Schema, can you provide a bit more of an example.
>  > > >
>  > >
>  > > The namespace URI definitively needs to preserved, I don't think
>  > > there's any question about that.
>  > >
>  > > What this issue is about is whether if it's a problem to get
>  > >
>  > > =A0 =A0<xyz:title xmlns:xyz=3D"http://www.xml.com/books">XML: A
>  > > Primer</xyz:title>
>  > >
>  > > or
>  > >
>  > > =A0 =A0<title xmlns=3D"http://www.xml.com/books">XML: A =
Primer</title>
>  > >
>  > > instead.
>  > >
>  > > *Usually* that doesn't make a difference, and in a perfect world,=20=

> it
>  > > never would. Unfortunately, this isn't a perfect world and a long=20=

> time
>  > > ago, XML vocabularies have started to leak prefixes into text=20
> content
>  > > and attribute values.
>  > >
>  > > Consider:
>  > >
>  > > =A0 =A0<xsl:template match=3D"D:propfind" xmlns:D=3D"DAV:">
>  > >
>  > > In this case, loosing the "D" prefix actually breaks the=20
> semantics of
>  > > the document, such as in:
>  > >
>  > > =A0 =A0<xsl:template match=3D"D:propfind" xmlns:ns0=3D"DAV:">
>  > >
>  > > This is an example from XSLT/XPath, similar cases can be=20
> constructed
>  > > with documents that use XML Schema, such as in
>  > >
>  > > =A0 =A0<count =
xmlns:xsi=3D"http://www.w3.org/2001/XMLSchema-instance"
>  > > =A0 =A0xmlns:xs=3D"http://www.w3.org/2001/XMLSchema"
>  > > xsi:type=3D"xs:integer">123</count>
>  > >
>  > > For the record, the XML Infoset spec includes prefixes.
>  > >
>  > > So no, rewriting namespace prefixes is *not* without problems, =
and
>  > > *will* break semantics of XML content. Thus, we should either=20
> require
>  > > prefixes to be preserved, or at least state that this part of the=20=

> XML
>  > > Infoset may not round-trip through WebDAV properties.
>  > >
>  > >> Thanks for educating me on this - I'm not really going to end up=20=

> with
>  > >> much
>  > >> of an opinion on any of this but I am making sure I know enough=20=

> to at
>  > >> least
>  > >> understand the argument. Also, I suspect I might not be the only=20=

> one
>  > >> of the
>  > >> list that does not understand as much about XML as I wish I did=20=

> :-)
>  > >
>  > > Sure :-)
>  > >
>  > > Best regards, Julian
>  > >
>  > >
>  >
>  >

--Apple-Mail-37--56100977
Content-Type: text/enriched;
	charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

That works for me, unless more feedback from implementors comes up
quite different. =20


Based on Julian's rewriting plus the discussion so far, here's some
proposed wording:


<fixed><fontfamily><param>Courier New</param>The value of a property
appears inside the property name element. The value

can be any kind of well-formed XML content: element content, text or
mixed

content. When the property value contains element or mixed content,=20

namespaces that are in scope for that part of the XML document apply
within=20

the property value as well, and servers MUST preserve namespaces in
server=20

storage for retransmission later.  The server MAY preserve namespace
prefixes=20

and non-significant whitespace.


For any values where specific prefix choices or whitespace matter
(e.g. property=20

values containing XPath with prefixes), clients might need to force
the server to=20

store the exact property value by encapsulating the value in a CDATA
section.

</fontfamily></fixed>

Lisa



On Oct 5, 2005, at 5:21 PM, Geoffrey M Clemm wrote:


<excerpt>

<fixed><x-tad-smaller>Julian's argument was:</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>> Thus, we should either require =
</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > prefixes to be preserved, or at least state
that this part of the XML </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Infoset may not round-trip through WebDAV
properties.</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>It appears that Lisa and Wilfredo do not like
the first alternative, so</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>let's explore the second alternative. =A0I believe
Julian is just saying here</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>that the specification should warn clients and
servers about the negative</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>consequences of not round-tripping namespace
prefixes (so that clients are</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>prepared to handle the negative consequences).
=A0Does anyone object to this</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>being added? =A0If not, Julian, could you write up
what you'd like to be said</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>here (I assume it would be something like what
you say below)? =A0Also, one</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>could add guidance to a client that they escape
the XML if they are concerned</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>about the non-round-tripping of namespace
prefixes.</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller> Cheers,</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>Geoff</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>Lisa wrote on 10/05/2005 06:12:52 =
PM:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > This is a great argument for a from-scratch
design, and I understand it </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > and would agree with it were we starting from
a clean slate. =A0However, </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > we're not starting from a clean =
slate.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > =A0 * Existing clients have to handle servers
that do prefix replacement. =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > An existing client would not benefit from
more stringent rules in </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > RFC2518bis until most servers are upgraded
and satisfy the new </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > requirements. =A0(Yes I'm aware this is a
general concern with spec </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > changes but it should still factor into this
trade-off calculation)</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > =A0 * Existing servers probably don't preserve
prefixes, by and large. =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Requiring so many existing implementations to
change is quite a burden. </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > =A0 For some of them this will involve
performance considerations.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > =A0 * I'm unaware of any actual
interoperability problems that have arisen </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > in ordinary usage that require prefix
preservation. =A0The template </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > example is certainly a theoretical problem I
agree.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > We might consider WSanchez's idea of
recommending that clients create </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > self-contained XML fragments =A0and escape with
CDATA, if the client is </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > concerned about prefix preservation.
=A0Otherwise, unprotected XML </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > fragments are subject to server rewriting
(whitespace as well as prefix </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > selection). =A0This seems like a more practical
approach starting from </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > where we are now, and I think it handles all
the cases with less spec </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > changes.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > On Oct 5, 2005, at 2:47 PM, Julian Reschke
wrote:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > Cullen Jennings =
wrote:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> I'm not sure I understand what you mean by
namespace preservation.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> Take the</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> example portion of some =
XML:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> <<h:html
xmlns:xdc=3D"http://www.xml.com/books"</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> =A0 =A0 =A0 =A0
xmlns:h=3D"http://www.w3.org/HTML/1998/html4"></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> =A0<<h:head><<h:title>Book
Review<</h:title><</h:head></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> =A0<<h:body></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> =A0 =
<<xdc:bookreview></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> =A0 =A0<<xdc:title>XML: A =
Primer<</xdc:title></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> Is it the "http://www.xml.com/books" that
gets preserved or the </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> "xdc". What</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> I'm trying to ask is if would be OK if the
above XML got transformed</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> to</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> <<h:html
xmlns:foo-xdc=3D"http://www.xml.com/books"</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> =A0 =A0 =A0 =A0
xmlns:h=3D"http://www.w3.org/HTML/1998/html4"></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> =A0<<h:head><<h:title>Book
Review<</h:title><</h:head></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> =A0<<h:body></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> =A0 =
<<foo-xdc:bookreview></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> =A0 =A0<<foo-xdc:title>XML: A
Primer<</xdc:title></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > > I suspect you are saying this is not OK
and the namespace prefix (ie </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > the</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > > xdc) needs to be preserved and not
changed to foo-xdc. If this is </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > what you</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > > mean, then I am not sure what you mean by
this is important for XSLT </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > and XML</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > > Schema, can you provide a bit more of an
example.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > The namespace URI definitively needs to
preserved, I don't think </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > there's any question about =
that.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > What this issue is about is whether if it's
a problem to get</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0<<xyz:title
xmlns:xyz=3D"http://www.xml.com/books">XML: A </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > Primer<</xyz:title></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > or</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0<<title
xmlns=3D"http://www.xml.com/books">XML: A =
Primer<</title></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > instead.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > *Usually* that doesn't make a difference,
and in a perfect world, it </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > never would. Unfortunately, this isn't a
perfect world and a long time </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > ago, XML vocabularies have started to leak
prefixes into text content </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > and attribute values.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > Consider:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0<<xsl:template match=3D"D:propfind"
xmlns:D=3D"DAV:"></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > In this case, loosing the "D" prefix
actually breaks the semantics of </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > the document, such as =
in:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0<<xsl:template match=3D"D:propfind"
xmlns:ns0=3D"DAV:"></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > This is an example from XSLT/XPath, similar
cases can be constructed</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > with documents that use XML Schema, such as
in</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0<<count
=
xmlns:xsi=3D"http://www.w3.org/2001/XMLSchema-instance"</x-tad-smaller></f=
ixed>

<fixed><x-tad-smaller> > > =A0
=A0xmlns:xs=3D"http://www.w3.org/2001/XMLSchema"</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =
xsi:type=3D"xs:integer">123<</count></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > For the record, the XML Infoset spec
includes prefixes.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > So no, rewriting namespace prefixes is
*not* without problems, and </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > *will* break semantics of XML content.
Thus, we should either require </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > prefixes to be preserved, or at least state
that this part of the XML </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > Infoset may not round-trip through WebDAV
properties.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> Thanks for educating me on this - I'm not
really going to end up with</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> much</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> of an opinion on any of this but I am
making sure I know enough to at </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> least</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> understand the argument. Also, I suspect I
might not be the only one </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> of the</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> list that does not understand as much
about XML as I wish I did :-)</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > Sure :-)</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > Best regards, Julian</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

</excerpt>=

--Apple-Mail-37--56100977--





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Wilfredo S=E1nchez Vega wrote:
>   Honestly, I don't really know, 'cuz I'm not an XML guy.  But this  is=
=20
> exactly why:
>=20
>     A) XML isn't nearly as easy as it's hyped up to be
>     B) We shouldn't allow XML elements in property values

A) Yes.

b) Well. 6 years too late.

Best regards, Julian






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+1

- Jim

On Oct 5, 2005, at 5:21 PM, Geoffrey M Clemm wrote:

>
> Julian's argument was:
> > Thus, we should either require
> > prefixes to be preserved, or at least state that this part of the  
> XML
> > Infoset may not round-trip through WebDAV properties.
>
> It appears that Lisa and Wilfredo do not like the first  
> alternative, so
> let's explore the second alternative.  I believe Julian is just  
> saying here
> that the specification should warn clients and servers about the  
> negative
> consequences of not round-tripping namespace prefixes (so that  
> clients are
> prepared to handle the negative consequences).  Does anyone object  
> to this
> being added?  If not, Julian, could you write up what you'd like to  
> be said
> here (I assume it would be something like what you say below)?   
> Also, one
> could add guidance to a client that they escape the XML if they are  
> concerned
> about the non-round-tripping of namespace prefixes.
>
> Cheers,
> Geoff
>
> Lisa wrote on 10/05/2005 06:12:52 PM:
> >
> > This is a great argument for a from-scratch design, and I  
> understand it
> > and would agree with it were we starting from a clean slate.   
> However,
> > we're not starting from a clean slate.
> >
> >   * Existing clients have to handle servers that do prefix  
> replacement.
> > An existing client would not benefit from more stringent rules in
> > RFC2518bis until most servers are upgraded and satisfy the new
> > requirements.  (Yes I'm aware this is a general concern with spec
> > changes but it should still factor into this trade-off calculation)
> >   * Existing servers probably don't preserve prefixes, by and large.
> > Requiring so many existing implementations to change is quite a  
> burden.
> >   For some of them this will involve performance considerations.
> >   * I'm unaware of any actual interoperability problems that have  
> arisen
> > in ordinary usage that require prefix preservation.  The template
> > example is certainly a theoretical problem I agree.
> >
> > We might consider WSanchez's idea of recommending that clients  
> create
> > self-contained XML fragments  and escape with CDATA, if the  
> client is
> > concerned about prefix preservation.  Otherwise, unprotected XML
> > fragments are subject to server rewriting (whitespace as well as  
> prefix
> > selection).  This seems like a more practical approach starting from
> > where we are now, and I think it handles all the cases with less  
> spec
> > changes.
> >
> > On Oct 5, 2005, at 2:47 PM, Julian Reschke wrote:
> >
> > >
> > > Cullen Jennings wrote:
> > >> I'm not sure I understand what you mean by namespace  
> preservation.
> > >> Take the
> > >> example portion of some XML:
> > >> <h:html xmlns:xdc="http://www.xml.com/books"
> > >>         xmlns:h="http://www.w3.org/HTML/1998/html4">
> > >>  <h:head><h:title>Book Review</h:title></h:head>
> > >>  <h:body>
> > >>   <xdc:bookreview>
> > >>    <xdc:title>XML: A Primer</xdc:title>
> > >> Is it the "http://www.xml.com/books" that gets preserved or the
> > >> "xdc". What
> > >> I'm trying to ask is if would be OK if the above XML got  
> transformed
> > >> to
> > >> <h:html xmlns:foo-xdc="http://www.xml.com/books"
> > >>         xmlns:h="http://www.w3.org/HTML/1998/html4">
> > >>  <h:head><h:title>Book Review</h:title></h:head>
> > >>  <h:body>
> > >>   <foo-xdc:bookreview>
> > >>    <foo-xdc:title>XML: A Primer</xdc:title>
> > > >
> > > > I suspect you are saying this is not OK and the namespace  
> prefix (ie
> > > the
> > > > xdc) needs to be preserved and not changed to foo-xdc. If  
> this is
> > > what you
> > > > mean, then I am not sure what you mean by this is important  
> for XSLT
> > > and XML
> > > > Schema, can you provide a bit more of an example.
> > > >
> > >
> > > The namespace URI definitively needs to preserved, I don't think
> > > there's any question about that.
> > >
> > > What this issue is about is whether if it's a problem to get
> > >
> > >    <xyz:title xmlns:xyz="http://www.xml.com/books">XML: A
> > > Primer</xyz:title>
> > >
> > > or
> > >
> > >    <title xmlns="http://www.xml.com/books">XML: A Primer</title>
> > >
> > > instead.
> > >
> > > *Usually* that doesn't make a difference, and in a perfect  
> world, it
> > > never would. Unfortunately, this isn't a perfect world and a  
> long time
> > > ago, XML vocabularies have started to leak prefixes into text  
> content
> > > and attribute values.
> > >
> > > Consider:
> > >
> > >    <xsl:template match="D:propfind" xmlns:D="DAV:">
> > >
> > > In this case, loosing the "D" prefix actually breaks the  
> semantics of
> > > the document, such as in:
> > >
> > >    <xsl:template match="D:propfind" xmlns:ns0="DAV:">
> > >
> > > This is an example from XSLT/XPath, similar cases can be  
> constructed
> > > with documents that use XML Schema, such as in
> > >
> > >    <count xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> > >    xmlns:xs="http://www.w3.org/2001/XMLSchema"
> > > xsi:type="xs:integer">123</count>
> > >
> > > For the record, the XML Infoset spec includes prefixes.
> > >
> > > So no, rewriting namespace prefixes is *not* without problems, and
> > > *will* break semantics of XML content. Thus, we should either  
> require
> > > prefixes to be preserved, or at least state that this part of  
> the XML
> > > Infoset may not round-trip through WebDAV properties.
> > >
> > >> Thanks for educating me on this - I'm not really going to end  
> up with
> > >> much
> > >> of an opinion on any of this but I am making sure I know  
> enough to at
> > >> least
> > >> understand the argument. Also, I suspect I might not be the  
> only one
> > >> of the
> > >> list that does not understand as much about XML as I wish I  
> did :-)
> > >
> > > Sure :-)
> > >
> > > Best regards, Julian
> > >
> > >
> >
> >


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<HTML><BODY style=3D"word-wrap: break-word; -khtml-nbsp-mode: space; =
-khtml-line-break: after-white-space; "><DIV>+1</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>- Jim</DIV><BR><DIV><DIV>On =
Oct 5, 2005, at 5:21 PM, Geoffrey M Clemm wrote:</DIV><BR =
class=3D"Apple-interchange-newline"><BLOCKQUOTE type=3D"cite"><BR><FONT =
size=3D"2"><TT>Julian's argument was:</TT></FONT> <BR><FONT =
size=3D"2"><TT>&gt; Thus, we should either require <BR> &gt; prefixes to =
be preserved, or at least state that this part of the XML <BR> &gt; =
Infoset may not round-trip through WebDAV properties.</TT></FONT> <BR> =
<BR><FONT size=3D"2"><TT>It appears that Lisa and Wilfredo do not like =
the first alternative, so</TT></FONT> <BR><FONT size=3D"2"><TT>let's =
explore the second alternative. =A0I believe Julian is just saying =
here</TT></FONT> <BR><FONT size=3D"2"><TT>that the specification should =
warn clients and servers about the negative</TT></FONT> <BR><FONT =
size=3D"2"><TT>consequences of not round-tripping namespace prefixes (so =
that clients are</TT></FONT> <BR><FONT size=3D"2"><TT>prepared to handle =
the negative consequences). =A0Does anyone object to this</TT></FONT> =
<BR><FONT size=3D"2"><TT>being added? =A0If not, Julian, could you write =
up what you'd like to be said</TT></FONT> <BR><FONT size=3D"2"><TT>here =
(I assume it would be something like what you say below)? =A0Also, =
one</TT></FONT> <BR><FONT size=3D"2"><TT>could add guidance to a client =
that they escape the XML if they are concerned</TT></FONT> <BR><FONT =
size=3D"2"><TT>about the non-round-tripping of namespace =
prefixes.</TT></FONT> <BR><FONT size=3D"2"><TT><BR> Cheers,</TT></FONT> =
<BR><FONT size=3D"2"><TT>Geoff</TT></FONT> <BR> <BR><FONT =
size=3D"2"><TT>Lisa wrote on 10/05/2005 06:12:52 PM:<BR> &gt; <BR> &gt; =
This is a great argument for a from-scratch design, and I understand it =
<BR> &gt; and would agree with it were we starting from a clean slate. =
=A0However, <BR> &gt; we're not starting from a clean slate.<BR> &gt; =
<BR> &gt; =A0 * Existing clients have to handle servers that do prefix =
replacement. =A0<BR> &gt; An existing client would not benefit from more =
stringent rules in <BR> &gt; RFC2518bis until most servers are upgraded =
and satisfy the new <BR> &gt; requirements. =A0(Yes I'm aware this is a =
general concern with spec <BR> &gt; changes but it should still factor =
into this trade-off calculation)<BR> &gt; =A0 * Existing servers =
probably don't preserve prefixes, by and large. =A0<BR> &gt; Requiring =
so many existing implementations to change is quite a burden. <BR> &gt; =
=A0 For some of them this will involve performance considerations.<BR> =
&gt; =A0 * I'm unaware of any actual interoperability problems that have =
arisen <BR> &gt; in ordinary usage that require prefix preservation. =
=A0The template <BR> &gt; example is certainly a theoretical problem I =
agree.<BR> &gt; <BR> &gt; We might consider WSanchez's idea of =
recommending that clients create <BR> &gt; self-contained XML fragments =
=A0and escape with CDATA, if the client is <BR> &gt; concerned about =
prefix preservation. =A0Otherwise, unprotected XML <BR> &gt; fragments =
are subject to server rewriting (whitespace as well as prefix <BR> &gt; =
selection). =A0This seems like a more practical approach starting from =
<BR> &gt; where we are now, and I think it handles all the cases with =
less spec <BR> &gt; changes.<BR> &gt; <BR> &gt; On Oct 5, 2005, at 2:47 =
PM, Julian Reschke wrote:<BR> &gt; <BR> &gt; &gt;<BR> &gt; &gt; Cullen =
Jennings wrote:<BR> &gt; &gt;&gt; I'm not sure I understand what you =
mean by namespace preservation. <BR> &gt; &gt;&gt; Take the<BR> &gt; =
&gt;&gt; example portion of some XML:<BR> &gt; &gt;&gt; &lt;h:html =
xmlns:xdc=3D"<A =
href=3D"http://www.xml.com/books">http://www.xml.com/books</A>"<BR> &gt; =
&gt;&gt; =A0 =A0 =A0 =A0 xmlns:h=3D"<A =
href=3D"http://www.w3.org/HTML/1998/html4">http://www.w3.org/HTML/1998/htm=
l4</A>"&gt;<BR> &gt; &gt;&gt; =A0&lt;h:head&gt;&lt;h:title&gt;Book =
Review&lt;/h:title&gt;&lt;/h:head&gt;<BR> &gt; &gt;&gt; =
=A0&lt;h:body&gt;<BR> &gt; &gt;&gt; =A0 &lt;xdc:bookreview&gt;<BR> &gt; =
&gt;&gt; =A0 =A0&lt;xdc:title&gt;XML: A Primer&lt;/xdc:title&gt;<BR> =
&gt; &gt;&gt; Is it the "<A =
href=3D"http://www.xml.com/books">http://www.xml.com/books</A>" that =
gets preserved or the <BR> &gt; &gt;&gt; "xdc". What<BR> &gt; &gt;&gt; =
I'm trying to ask is if would be OK if the above XML got transformed =
<BR> &gt; &gt;&gt; to<BR> &gt; &gt;&gt; &lt;h:html xmlns:foo-xdc=3D"<A =
href=3D"http://www.xml.com/books">http://www.xml.com/books</A>"<BR> &gt; =
&gt;&gt; =A0 =A0 =A0 =A0 xmlns:h=3D"<A =
href=3D"http://www.w3.org/HTML/1998/html4">http://www.w3.org/HTML/1998/htm=
l4</A>"&gt;<BR> &gt; &gt;&gt; =A0&lt;h:head&gt;&lt;h:title&gt;Book =
Review&lt;/h:title&gt;&lt;/h:head&gt;<BR> &gt; &gt;&gt; =
=A0&lt;h:body&gt;<BR> &gt; &gt;&gt; =A0 &lt;foo-xdc:bookreview&gt;<BR> =
&gt; &gt;&gt; =A0 =A0&lt;foo-xdc:title&gt;XML: A =
Primer&lt;/xdc:title&gt;<BR> &gt; &gt; &gt;<BR> &gt; &gt; &gt; I suspect =
you are saying this is not OK and the namespace prefix (ie <BR> &gt; =
&gt; the<BR> &gt; &gt; &gt; xdc) needs to be preserved and not changed =
to foo-xdc. If this is <BR> &gt; &gt; what you<BR> &gt; &gt; &gt; mean, =
then I am not sure what you mean by this is important for XSLT <BR> &gt; =
&gt; and XML<BR> &gt; &gt; &gt; Schema, can you provide a bit more of an =
example.<BR> &gt; &gt; &gt;<BR> &gt; &gt;<BR> &gt; &gt; The namespace =
URI definitively needs to preserved, I don't think <BR> &gt; &gt; =
there's any question about that.<BR> &gt; &gt;<BR> &gt; &gt; What this =
issue is about is whether if it's a problem to get<BR> &gt; &gt;<BR> =
&gt; &gt; =A0 =A0&lt;xyz:title xmlns:xyz=3D"<A =
href=3D"http://www.xml.com/books">http://www.xml.com/books</A>"&gt;XML: =
A <BR> &gt; &gt; Primer&lt;/xyz:title&gt;<BR> &gt; &gt;<BR> &gt; &gt; =
or<BR> &gt; &gt;<BR> &gt; &gt; =A0 =A0&lt;title xmlns=3D"<A =
href=3D"http://www.xml.com/books">http://www.xml.com/books</A>"&gt;XML: =
A Primer&lt;/title&gt;<BR> &gt; &gt;<BR> &gt; &gt; instead.<BR> &gt; =
&gt;<BR> &gt; &gt; *Usually* that doesn't make a difference, and in a =
perfect world, it <BR> &gt; &gt; never would. Unfortunately, this isn't =
a perfect world and a long time <BR> &gt; &gt; ago, XML vocabularies =
have started to leak prefixes into text content <BR> &gt; &gt; and =
attribute values.<BR> &gt; &gt;<BR> &gt; &gt; Consider:<BR> &gt; =
&gt;<BR> &gt; &gt; =A0 =A0&lt;xsl:template match=3D"D:propfind" =
xmlns:D=3D"DAV:"&gt;<BR> &gt; &gt;<BR> &gt; &gt; In this case, loosing =
the "D" prefix actually breaks the semantics of <BR> &gt; &gt; the =
document, such as in:<BR> &gt; &gt;<BR> &gt; &gt; =A0 =A0&lt;xsl:template =
match=3D"D:propfind" xmlns:ns0=3D"DAV:"&gt;<BR> &gt; &gt;<BR> &gt; &gt; =
This is an example from XSLT/XPath, similar cases can be constructed =
<BR> &gt; &gt; with documents that use XML Schema, such as in<BR> &gt; =
&gt;<BR> &gt; &gt; =A0 =A0&lt;count xmlns:xsi=3D"<A =
href=3D"http://www.w3.org/2001/XMLSchema-instance">http://www.w3.org/2001/=
XMLSchema-instance</A>"<BR> &gt; &gt; =A0 =A0xmlns:xs=3D"<A =
href=3D"http://www.w3.org/2001/XMLSchema">http://www.w3.org/2001/XMLSchema=
</A>" <BR> &gt; &gt; xsi:type=3D"xs:integer"&gt;123&lt;/count&gt;<BR> =
&gt; &gt;<BR> &gt; &gt; For the record, the XML Infoset spec includes =
prefixes.<BR> &gt; &gt;<BR> &gt; &gt; So no, rewriting namespace =
prefixes is *not* without problems, and <BR> &gt; &gt; *will* break =
semantics of XML content. Thus, we should either require <BR> &gt; &gt; =
prefixes to be preserved, or at least state that this part of the XML =
<BR> &gt; &gt; Infoset may not round-trip through WebDAV properties.<BR> =
&gt; &gt;<BR> &gt; &gt;&gt; Thanks for educating me on this - I'm not =
really going to end up with <BR> &gt; &gt;&gt; much<BR> &gt; &gt;&gt; of =
an opinion on any of this but I am making sure I know enough to at <BR> =
&gt; &gt;&gt; least<BR> &gt; &gt;&gt; understand the argument. Also, I =
suspect I might not be the only one <BR> &gt; &gt;&gt; of the<BR> &gt; =
&gt;&gt; list that does not understand as much about XML as I wish I did =
:-)<BR> &gt; &gt;<BR> &gt; &gt; Sure :-)<BR> &gt; &gt;<BR> &gt; &gt; =
Best regards, Julian<BR> &gt; &gt;<BR> &gt; &gt;<BR> &gt; <BR> &gt; <BR> =
</TT></FONT></BLOCKQUOTE></DIV><BR></BODY></HTML>=

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From: Cullen Jennings <fluffy@cisco.com>
To: david muller <david_muller_8888@yahoo.co.uk>
CC: WebDav <w3c-dist-auth@w3.org>, Jim Whitehead <ejw@soe.ucsc.edu>
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Thread-Topic: ideas for research on wbedav required
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I suspect it is hard to do a PhD on a protocol but there is a problem that
has interest me a big and I suspect that DAV might be a small part of the
answer. More and more I various communication devices - cell phones, pda,
pager, computers, IM devices. They deal with various media: short
interactive text, longer text, voice, video, smell-o-vision. And I have all
kinds of rules about who can send me messages when and how they get routed
to me. My company has rules too. I have privacy constraints. Regulatory
bodies have rules and anti privacy constraints. If I block Alice from
sending me email, I probably want to block her from IM too. It's fine to
have rules in just a single email reader but if I want the rules there to
effect all my communications, such as a phone call, I need more. How do I
mange all these rules. How do I merge these rules. How does one device
discover my rules, edit them, then upload them for all my devices. How do
privacy of sender and receiver, and preferences of sender and receiver all
get balanced. How do you make it simple enough for a single user to
understand. How can an agent that watches that I just paged Alice decide to
go and add a temporarily rule to page me if I get an email from Alice. How
can we collect enough statistics to realize that I always send phone calls
from Bob to voicemail so just send them straight there without ringing my
phone. I suspect that answering these hard questions might be able to lead
to some PhD research and it seems very likely the way to transport, edit,
and control the policy information could be DAV.

I'm cool with talk about what sort of research could be done involving
WebDav on this list, but please, please, if we are going discuss the SPAM
things, please, please move it to some other list. Anywhere but my backyard
is fine, may I suggest the DKIM mailing list. I'm sure DAV is a fine
protocol to transfer keys for DKIM, take it to the DKIM list.

Cullen (not as chair)


On 10/5/05 3:37 PM, "david muller" <david_muller_8888@yahoo.co.uk> wrote:

> 
> Dear Sir,
> 
> thanks for your ideas. I had myself once vaguely
> thought of the webdav email transport protocol long
> back but could not get the clear thought that time. I
> found it quite interesting and innovative. I will
> concentrate on this idea for now and will look into
> other ideas later.
> 
> Few poins:
> 
> 1. What I could understand of the idea is "To Develop
> a Mail Transport Protocol Based on WEBDAV (i.e which
> uses the extra methods like copy, move, delete,
> profind, propatch, lock, unlock provided by webdav).
> ". The protocol should be point to point, have
> authentication, some sort of identity management.
> 
> 2. You have said that WebDAV is already the third most
> popular email transport  between mail server and mail
> client (MUA ?), since Hotmail and Outlook Express use
> WebDAV for mail transport. So does it mean that
> hotmail and outlook have already developed a transport
> protocol based on WEBDAV and are using it?
> 
> 3. Would one of the major intention behind this new
> transport protocol be to stop SPAM (you have said that
> SPAM is killing SMTP)? If yes then I really did not
> understand that why you think that point to point
> transport protocol would not have spam problem.
> 
> 
> Thanks for your time,
> Regards.
> 
> 
> 
> 
>> * Email transport protocol. Spam is killing SMTP. It
>> would be nice to have a mail transport protocol that
> was > point-to-point, and involved
>> authentication or some form of expensive computation
>> for people to  
>> write email to a remote inbox. An email message is a
>> blog of content 
>> plus metadata, just like a WebDAV resource. WebDAV +
>> ACLs might be an
>> interesting starting point for creating an alternate
>> to SMTP for mail
>> transport.  WebDAV is already the third most popular
>> email transport 
>> between mail server and mail client (MUA), since
>> Hotmail and Outlook
>> Express use WebDAV for mail transport. Note that
>> this project might
>> very well also involve a solution for identity
>> management. For extra
>> credit (and a shred of hope for adoption), ensure
>> some form of  
>> interoperability with the existing SMTP-based email
>> system (perhaps 
>> by putting all of this email into an "untrusted" or
>> "unverified"  
>> folder)
> 
> 
> 
> ___________________________________________________________
> To help you stay safe and secure online, we've developed the all new Yahoo!
> Security Centre. http://uk.security.yahoo.com




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Date: Thu, 06 Oct 2005 21:05:32 -0700
From: Cullen Jennings <fluffy@cisco.com>
To: Julian Reschke <julian.reschke@gmx.de>
CC: WebDav <w3c-dist-auth@w3.org>
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Thanks for the good explanation - I get it now. What a nightmare.

On 10/5/05 2:47 PM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> Cullen Jennings wrote:
>> 
>> I'm not sure I understand what you mean by namespace preservation. Take the
>> example portion of some XML:
>> 
>> <h:html xmlns:xdc="http://www.xml.com/books"
>>         xmlns:h="http://www.w3.org/HTML/1998/html4">
>>  <h:head><h:title>Book Review</h:title></h:head>
>>  <h:body>
>>   <xdc:bookreview>
>>    <xdc:title>XML: A Primer</xdc:title>
>> 
>> Is it the "http://www.xml.com/books" that gets preserved or the "xdc". What
>> I'm trying to ask is if would be OK if the above XML got transformed to
>> 
>> <h:html xmlns:foo-xdc="http://www.xml.com/books"
>>         xmlns:h="http://www.w3.org/HTML/1998/html4">
>>  <h:head><h:title>Book Review</h:title></h:head>
>>  <h:body>
>>   <foo-xdc:bookreview>
>>    <foo-xdc:title>XML: A Primer</xdc:title>
>> 
>> I suspect you are saying this is not OK and the namespace prefix (ie the
>> xdc) needs to be preserved and not changed to foo-xdc. If this is
> what you
>> mean, then I am not sure what you mean by this is important for XSLT
> and XML
>> Schema, can you provide a bit more of an example.
>> 
> 
> The namespace URI definitively needs to preserved, I don't think there's
> any question about that.
> 
> What this issue is about is whether if it's a problem to get
> 
> <xyz:title xmlns:xyz="http://www.xml.com/books">XML: A Primer</xyz:title>
> 
> or
> 
> <title xmlns="http://www.xml.com/books">XML: A Primer</title>
> 
> instead.
> 
> *Usually* that doesn't make a difference, and in a perfect world, it
> never would. Unfortunately, this isn't a perfect world and a long time
> ago, XML vocabularies have started to leak prefixes into text content
> and attribute values.
> 
> Consider:
> 
> <xsl:template match="D:propfind" xmlns:D="DAV:">
> 
> In this case, loosing the "D" prefix actually breaks the semantics of
> the document, such as in:
> 
> <xsl:template match="D:propfind" xmlns:ns0="DAV:">
> 
> This is an example from XSLT/XPath, similar cases can be constructed
> with documents that use XML Schema, such as in
> 
> <count xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>     xmlns:xs="http://www.w3.org/2001/XMLSchema"
> xsi:type="xs:integer">123</count>
> 
> For the record, the XML Infoset spec includes prefixes.
> 
> So no, rewriting namespace prefixes is *not* without problems, and
> *will* break semantics of XML content. Thus, we should either require
> prefixes to be preserved, or at least state that this part of the XML
> Infoset may not round-trip through WebDAV properties.
> 
>> Thanks for educating me on this - I'm not really going to end up with much
>> of an opinion on any of this but I am making sure I know enough to at least
>> understand the argument. Also, I suspect I might not be the only one of the
>> list that does not understand as much about XML as I wish I did :-)
> 
> Sure :-)
> 
> Best regards, Julian




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___
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___
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Cullen Jennings wrote:
> 
> The goal of the call is to do triage on the 2518bis-07 issues.
> 
> If you plan to join the conference call next Thursday, please drop me an
> email so I make sure there are enough ports reserved.
> 
> Date/Time:              October 13, 2005 at 10:00 AM America/Los_Angeles
> Length:                 60 minutes
> Frequency:              once
> Meeting ID:             251807
> Description:            <None>
> Phone Numbers:          1-866-MEETME9 (US Toll-free)
>                         1-650-260-9030 (Local/International)
> 
> For Cisco MeetingPlace Help Desk assistance, please call: 866-631-5313 (US
> Toll-free) or 408-450-7637 (Local/International) or email
> mailto:at.help@meetingplace.net.

Reminder,

contrary to the original subject line, the next conference call actually 
is this *Thursday* (attaching ICS file).

Besides the issues we want to discuss (for which I'll submit a few more 
proposals), I'd like to see the following procedural stuff discussed:

- if rfc2518bis.xml is to continue to reside on 
<http://ietf.webdav.org/webdav/rfc2518bis/>, please turn version control on

- please make sure that the file at 
<http://ietf.webdav.org/webdav/rfc2518bis/draft-ietf-webdav-rfc2518bis.xml> 
always contains the latest edits, and that these edits are announced & 
discussed on the mailing list before it actually gets submitted as a new 
draft

Best regards, Julian



--------------060502020906010400040707
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BEGIN:VCALENDAR
BEGIN:VEVENT
UID
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SUMMARY
 :WebDAV WG conference call
DESCRIPTION
 :Meeting ID:             251807\nMeeting Password:  \nPhone Numbers: 
  1-866-MEETME9 (US Toll-free)\n                        1-650-260-9030 
 (Local/International)
CATEGORIES
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URL
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STATUS
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CLASS
 :PUBLIC
DTSTART
 :20051013T170000Z
DTEND
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DTSTAMP
 :20051004T171529Z
LAST-MODIFIED
 :20051004T182211Z
BEGIN:VALARM
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--------------060502020906010400040707--




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Hi,

as discussed previously, I have submitted the current version of the 
WebDAV mount spec as a new draft (HTML version at 
<http://greenbytes.de/tech/webdav/draft-reschke-webdav-mount-02.html>). 
Unless any new issues are raised, I'll submit this draft to the RFC 
Editor for publication as Informational RFC early next week.

Best regards, Julian


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A New Internet-Draft is available from the on-line Internet-Drafts 
directories.


	Title		: Mounting WebDAV (Web Distributed Authoring and Versioning) servers
	Author(s)	: J. Reschke
	Filename	: draft-reschke-webdav-mount-02.txt
	Pages		: 16
	Date		: 2005-10-11
	
In current Web browsers, there is no uniform way to specify that a
    user clicking on a link will be presented with an editable view of a
    WebDAV server.  For example, it is frequently desirable to be able to
    click on a link, and have this link open a window that can handle
    drag and drop interaction with the resources of a WebDAV server.

    This document specifies a mechanism and a document format that
    enables Web Distributed Authoring and Versioning (WebDAV) servers to
    send "mounting" information to a WebDAV client.  The protocol is
    designed to work on any platform and with any combination of browser
    and WebDAV client, relying solely on the well-understood dispatch of
    documents through their MIME type.

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From: Lisa Dusseault <lisa@osafoundation.org>
Date: Tue, 11 Oct 2005 17:59:46 -0700
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This thread from a couple months ago brought up something probably 
worth clarifying in RFC2518bis.  In fact we could usefully constrain 
servers generally in what status codes MAY or MUST NOT be used inside 
Multi-Status.  I wrote up a strawman draft section for this so we could 
discuss the specifics:

    The following status codes MUST NOT be used in Multi-Status
    responses: 100 Continue, 101 Switching Protocols, 205 Reset Content,
    206 Partial Content, 300 Multiple Choices?, 305 Use Proxy, 400 Bad
    Request, 405 Method Not Allowed, 406 Not Acceptable, 407 Proxy
    Authentication Required, 411 Length Required, 412 Precondition
    Failed, 413 Request Entity Too Large, 414 Request-URI Too Long, 415
    Unsupported Media Type, 416 Requested Range Not Satisfiable, 417
    Expectation Failed, 501 Not Implemented and 505 HTTP Version Not
    Supported.

    The following status codes MAY be used in Multi-Status responses: 200
    OK, 201 Created, 301 Moved Permanently, 302 Found, 303 See Other, 307
    Temporary Redirect, 401 Unauthorized, 403 Forbidden, 404 Not Found
    and 410 Gone.

    The following status codes MAY be used in Multi-Status responses,
    although the meaning might be unclear based only on this
    specification.  Thus, specifications extending WebDAV MAY make use of
    these status codes in Multi-Status responses but regular WebDAV
    clients would reasonably be expected to be confused by these: 202
    Accepted, 203 Non-Authoritative Information, 204 No Content, 304 Not
    Modified, 402 Payment Required, 409 Conflict, 408 Request Timeout,
    500 Internal Server Error, 502 Bad Gateway, 503 Service Unavailable
    and 504 Gateway Timeout.

Comments?

Lisa

On Jul 20, 2005, at 11:48 PM, Julian Reschke wrote:

>
> ChunWei Ho wrote:
>> Hi,
>> I have another question. When the If header (webDAV's If header)
>> condition is not met, the request should fail with 412 Precondition
>> Failed. If the request is one over multiple resource, like PROPFIND,
>> COPY or MOVE over Depth > 0, should the whole request fail returning
>> 412 Precondition Failed, or fail only for the specific resources
>> returning 207 MultiStatus with some portions giving a 412 Precondition
>> Failed.
>> Thanks again for the help! :)
>> Regards,
>> CW
>
> Hi,
>
> judging from 
> <http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.9.4.p.4>:
>
> "The If header's purpose is to describe a series of state lists. If 
> the state of the resource to which the header is applied does not 
> match any of the specified state lists then the request MUST fail with 
> a 412 (Precondition Failed). If one of the described state lists 
> matches the state of the resource then the request may succeed."
>
> I would say that the server must return a 412 (so partial 
> execution/success of the request is not an option).
>
> Best regards, Julian
>





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Some of these are pretty obvious, such as no reason to return a 
multi-status
for something that is independent of the target resource (e.g., 413, 414),
but it would be worth at least a one-liner explaining why these status 
codes
must not be used.

More generally, could you explain what problem this is intended to solve?
A client must be written to cope with status codes it doesn't understand,
in which case it will just look at the first digit.

Cheers,
Geoff


Lisa wrote on 10/11/2005 08:59:46 PM:

> 
> This thread from a couple months ago brought up something probably 
> worth clarifying in RFC2518bis.  In fact we could usefully constrain 
> servers generally in what status codes MAY or MUST NOT be used inside 
> Multi-Status.  I wrote up a strawman draft section for this so we could 
> discuss the specifics:
> 
>     The following status codes MUST NOT be used in Multi-Status
>     responses: 100 Continue, 101 Switching Protocols, 205 Reset Content,
>     206 Partial Content, 300 Multiple Choices?, 305 Use Proxy, 400 Bad
>     Request, 405 Method Not Allowed, 406 Not Acceptable, 407 Proxy
>     Authentication Required, 411 Length Required, 412 Precondition
>     Failed, 413 Request Entity Too Large, 414 Request-URI Too Long, 415
>     Unsupported Media Type, 416 Requested Range Not Satisfiable, 417
>     Expectation Failed, 501 Not Implemented and 505 HTTP Version Not
>     Supported.
> 
>     The following status codes MAY be used in Multi-Status responses: 
200
>     OK, 201 Created, 301 Moved Permanently, 302 Found, 303 See Other, 
307
>     Temporary Redirect, 401 Unauthorized, 403 Forbidden, 404 Not Found
>     and 410 Gone.
> 
>     The following status codes MAY be used in Multi-Status responses,
>     although the meaning might be unclear based only on this
>     specification.  Thus, specifications extending WebDAV MAY make use 
of
>     these status codes in Multi-Status responses but regular WebDAV
>     clients would reasonably be expected to be confused by these: 202
>     Accepted, 203 Non-Authoritative Information, 204 No Content, 304 Not
>     Modified, 402 Payment Required, 409 Conflict, 408 Request Timeout,
>     500 Internal Server Error, 502 Bad Gateway, 503 Service Unavailable
>     and 504 Gateway Timeout.
> 
> Comments?
> 
> Lisa
> 
> On Jul 20, 2005, at 11:48 PM, Julian Reschke wrote:
> 
> >
> > ChunWei Ho wrote:
> >> Hi,
> >> I have another question. When the If header (webDAV's If header)
> >> condition is not met, the request should fail with 412 Precondition
> >> Failed. If the request is one over multiple resource, like PROPFIND,
> >> COPY or MOVE over Depth > 0, should the whole request fail returning
> >> 412 Precondition Failed, or fail only for the specific resources
> >> returning 207 MultiStatus with some portions giving a 412 
Precondition
> >> Failed.
> >> Thanks again for the help! :)
> >> Regards,
> >> CW
> >
> > Hi,
> >
> > judging from 
> > <http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.9.4.p.4>:
> >
> > "The If header's purpose is to describe a series of state lists. If 
> > the state of the resource to which the header is applied does not 
> > match any of the specified state lists then the request MUST fail with 

> > a 412 (Precondition Failed). If one of the described state lists 
> > matches the state of the resource then the request may succeed."
> >
> > I would say that the server must return a 412 (so partial 
> > execution/success of the request is not an option).
> >
> > Best regards, Julian
> >
> 
> 

--=_alternative 00096D9685257098_=
Content-Type: text/html; charset="US-ASCII"


<br><font size=2><tt>Some of these are pretty obvious, such as no reason
to return a multi-status</tt></font>
<br><font size=2><tt>for something that is independent of the target resource
(e.g., 413, 414),</tt></font>
<br><font size=2><tt>but it would be worth at least a one-liner explaining
why these status codes</tt></font>
<br><font size=2><tt>must not be used.</tt></font>
<br>
<br><font size=2><tt>More generally, could you explain what problem this
is intended to solve?</tt></font>
<br><font size=2><tt>A client must be written to cope with status codes
it doesn't understand,</tt></font>
<br><font size=2><tt>in which case it will just look at the first digit.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br>
<br><font size=2><tt>Lisa wrote on 10/11/2005 08:59:46 PM:<br>
<br>
&gt; <br>
&gt; This thread from a couple months ago brought up something probably
<br>
&gt; worth clarifying in RFC2518bis. &nbsp;In fact we could usefully constrain
<br>
&gt; servers generally in what status codes MAY or MUST NOT be used inside
<br>
&gt; Multi-Status. &nbsp;I wrote up a strawman draft section for this so
we could <br>
&gt; discuss the specifics:<br>
&gt; <br>
&gt; &nbsp; &nbsp; The following status codes MUST NOT be used in Multi-Status<br>
&gt; &nbsp; &nbsp; responses: 100 Continue, 101 Switching Protocols, 205
Reset Content,<br>
&gt; &nbsp; &nbsp; 206 Partial Content, 300 Multiple Choices?, 305 Use
Proxy, 400 Bad<br>
&gt; &nbsp; &nbsp; Request, 405 Method Not Allowed, 406 Not Acceptable,
407 Proxy<br>
&gt; &nbsp; &nbsp; Authentication Required, 411 Length Required, 412 Precondition<br>
&gt; &nbsp; &nbsp; Failed, 413 Request Entity Too Large, 414 Request-URI
Too Long, 415<br>
&gt; &nbsp; &nbsp; Unsupported Media Type, 416 Requested Range Not Satisfiable,
417<br>
&gt; &nbsp; &nbsp; Expectation Failed, 501 Not Implemented and 505 HTTP
Version Not<br>
&gt; &nbsp; &nbsp; Supported.<br>
&gt; <br>
&gt; &nbsp; &nbsp; The following status codes MAY be used in Multi-Status
responses: 200<br>
&gt; &nbsp; &nbsp; OK, 201 Created, 301 Moved Permanently, 302 Found, 303
See Other, 307<br>
&gt; &nbsp; &nbsp; Temporary Redirect, 401 Unauthorized, 403 Forbidden,
404 Not Found<br>
&gt; &nbsp; &nbsp; and 410 Gone.<br>
&gt; <br>
&gt; &nbsp; &nbsp; The following status codes MAY be used in Multi-Status
responses,<br>
&gt; &nbsp; &nbsp; although the meaning might be unclear based only on
this<br>
&gt; &nbsp; &nbsp; specification. &nbsp;Thus, specifications extending
WebDAV MAY make use of<br>
&gt; &nbsp; &nbsp; these status codes in Multi-Status responses but regular
WebDAV<br>
&gt; &nbsp; &nbsp; clients would reasonably be expected to be confused
by these: 202<br>
&gt; &nbsp; &nbsp; Accepted, 203 Non-Authoritative Information, 204 No
Content, 304 Not<br>
&gt; &nbsp; &nbsp; Modified, 402 Payment Required, 409 Conflict, 408 Request
Timeout,<br>
&gt; &nbsp; &nbsp; 500 Internal Server Error, 502 Bad Gateway, 503 Service
Unavailable<br>
&gt; &nbsp; &nbsp; and 504 Gateway Timeout.<br>
&gt; <br>
&gt; Comments?<br>
&gt; <br>
&gt; Lisa<br>
&gt; <br>
&gt; On Jul 20, 2005, at 11:48 PM, Julian Reschke wrote:<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; ChunWei Ho wrote:<br>
&gt; &gt;&gt; Hi,<br>
&gt; &gt;&gt; I have another question. When the If header (webDAV's If
header)<br>
&gt; &gt;&gt; condition is not met, the request should fail with 412 Precondition<br>
&gt; &gt;&gt; Failed. If the request is one over multiple resource, like
PROPFIND,<br>
&gt; &gt;&gt; COPY or MOVE over Depth &gt; 0, should the whole request
fail returning<br>
&gt; &gt;&gt; 412 Precondition Failed, or fail only for the specific resources<br>
&gt; &gt;&gt; returning 207 MultiStatus with some portions giving a 412
Precondition<br>
&gt; &gt;&gt; Failed.<br>
&gt; &gt;&gt; Thanks again for the help! :)<br>
&gt; &gt;&gt; Regards,<br>
&gt; &gt;&gt; CW<br>
&gt; &gt;<br>
&gt; &gt; Hi,<br>
&gt; &gt;<br>
&gt; &gt; judging from <br>
&gt; &gt; &lt;http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.9.4.p.4&gt;:<br>
&gt; &gt;<br>
&gt; &gt; &quot;The If header's purpose is to describe a series of state
lists. If <br>
&gt; &gt; the state of the resource to which the header is applied does
not <br>
&gt; &gt; match any of the specified state lists then the request MUST
fail with <br>
&gt; &gt; a 412 (Precondition Failed). If one of the described state lists
<br>
&gt; &gt; matches the state of the resource then the request may succeed.&quot;<br>
&gt; &gt;<br>
&gt; &gt; I would say that the server must return a 412 (so partial <br>
&gt; &gt; execution/success of the request is not an option).<br>
&gt; &gt;<br>
&gt; &gt; Best regards, Julian<br>
&gt; &gt;<br>
&gt; <br>
&gt; <br>
</tt></font>
--=_alternative 00096D9685257098_=--




From w3c-dist-auth-request@frink.w3.org Wed Oct 12 02:18:01 2005
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References: <31f07fc305071823571981b4a3@mail.gmail.com>	 <42DCACAC.4000605@gmx.de> <31f07fc30507190122366e93dd@mail.gmail.com> <31f07fc305072008165be47e70@mail.gmail.com> <42DF453D.8090706@gmx.de> <a4d19cbb0c2ea9b3c355fcd2ef29ed40@osafoundation.org>
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Lisa Dusseault wrote:
> 
> This thread from a couple months ago brought up something probably worth 
> clarifying in RFC2518bis.  In fact we could usefully constrain servers 
> generally in what status codes MAY or MUST NOT be used inside 
> Multi-Status.  I wrote up a strawman draft section for this so we could 
> discuss the specifics:
> 
>    The following status codes MUST NOT be used in Multi-Status
>    responses: 100 Continue, 101 Switching Protocols, 205 Reset Content,
>    206 Partial Content, 300 Multiple Choices?, 305 Use Proxy, 400 Bad
>    Request, 405 Method Not Allowed, 406 Not Acceptable, 407 Proxy
>    Authentication Required, 411 Length Required, 412 Precondition
>    Failed, 413 Request Entity Too Large, 414 Request-URI Too Long, 415
>    Unsupported Media Type, 416 Requested Range Not Satisfiable, 417
>    Expectation Failed, 501 Not Implemented and 505 HTTP Version Not
>    Supported.
> 
>    The following status codes MAY be used in Multi-Status responses: 200
>    OK, 201 Created, 301 Moved Permanently, 302 Found, 303 See Other, 307
>    Temporary Redirect, 401 Unauthorized, 403 Forbidden, 404 Not Found
>    and 410 Gone.
> 
>    The following status codes MAY be used in Multi-Status responses,
>    although the meaning might be unclear based only on this
>    specification.  Thus, specifications extending WebDAV MAY make use of
>    these status codes in Multi-Status responses but regular WebDAV
>    clients would reasonably be expected to be confused by these: 202
>    Accepted, 203 Non-Authoritative Information, 204 No Content, 304 Not
>    Modified, 402 Payment Required, 409 Conflict, 408 Request Timeout,
>    500 Internal Server Error, 502 Bad Gateway, 503 Service Unavailable
>    and 504 Gateway Timeout.
> 
> Comments?

Yes.

1) What exactly is the issue this is supposed to solve?

2) How did you come up with these lists? How do they help a client that 
needs to handle unknown status codes anyway (based on the first digit)? 
For instance, why can 300 not appear in a multistatus?

Best regards, Julian




From w3c-dist-auth-request@frink.w3.org Wed Oct 12 02:21:11 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=91

           Summary: chapter name for lock token uri schemes
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.6.4
        OS/Version: other
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: 06.  Locking
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


I think the rewrite of 6.4 may be read as if only "urn:uuid" or
"opaquelocktoken" URIs are allowed. In fact, any legal URI is allowed, as long
as the server makes sure that the tokens it is generating are unique.

Maybe renaming the section to something like "Examples of applicable URI schemes
for lock tokens" will do.



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From w3c-dist-auth-request@frink.w3.org Wed Oct 12 02:22:24 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=92

           Summary: lock owner description
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.7.1
        OS/Version: other
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: 07.  Write Lock
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


This section is new, and I think it's a good start.

Suggestions: 

- shouldn't the (newly introduced) term "principal" occur here somewhere?

- I think we need to make it very clear that the lock owner (== creator of the
lock) is something completely different from the value of the DAV:owner element
on the lock (which is client supplied)



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=93

           Summary: Write Locks and Collections vs MOVE
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://http://greenbytes.de/tech/webdav/draft-ietf-
                    webdav-rfc2518bis-07.html#rfc.section.7.7
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 07.  Write Lock
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


"This means that if a collection is locked (depth 0 or infinity), its lock-token
is required in all these cases:

    * DELETE a collection's direct internal member
    * MOVE a member out of the collection
    * MOVE a member into the collection, unless it overwrites a pre- existing member
    * MOVE to rename it within a collection,
    * COPY a member into a collection, unless it overwrites a pre- existing member
    * PUT or MKCOL request which would create a new member."
    
I disagree with the third one: even if this operation doesn't change the set of
internal member *names*, it definitively changes the set of URI mappings.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=94

           Summary: COPY and the Overwrite Header vs
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.8.9.4
        OS/Version: other
            Status: NEW
          Severity: major
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


"(Extensions to WebDAV might not follow this rule to the letter but	
			must consider backwards compatibility with clients that expect COPY	
			to work this way.)"
      
Fact is RFC3253 does not follow this rule, and with good reasons. Seems to me
that RFC2518bis needs to reflect reality, instead of insisting it's somebody
else's problem.



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Subject: [Bug 95] New: possible LOCK response codes
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=95

           Summary: possible LOCK response codes
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.8.11.5
        OS/Version: other
            Status: NEW
          Severity: major
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


Why was 412 removed (as far as I can tell, a 412 can occur), and 424 added (how
would that occur?)



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From w3c-dist-auth-request@frink.w3.org Wed Oct 12 02:28:20 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=96

           Summary: combining tagged list and untagged list
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.9.5.2
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


The statement 

"The tagged-list production MUST NOT be used together with the no-tag-list
production, either in the same If header or in a continuation."

was added. Why? Was this discussed anywhere?



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From w3c-dist-auth-request@frink.w3.org Wed Oct 12 02:31:25 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=97

           Summary: new error code descriptions
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.11.6
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 11.  Use of HTTP Status Codes
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


As stated earlier, I think it's a mistake to repeat what other specs already say
normatively. In the best case, it's text duplication. In other case, it just
creates confusion, such as in:

"Any request may contain a conditional header defined in HTTP (If-Match,
If-Modified-Since, etc.) or the "If" conditional header defined in this
specification. If the request contains a conditional header, and if that
condition fails to hold, then this error code may be returned. This status code
is not typically appropriate if the client did not include a conditional header
in the request."

What is the last sentence trying to state here? Does this mean there are cases
where it is appropriate to send a 412 although there was no conditional header?
What case would that be?



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From w3c-dist-auth-request@frink.w3.org Wed Oct 12 02:32:58 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=98

           Summary: new error code descriptions, continued
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.11.8
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 11.  Use of HTTP Status Codes
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


"This status code is particularly useful to respond to requests that the server
considers a denial-of-service attack, such as excessively large PROPFIND depth
infinity requests or requests in quick succession."

RFC2616 states (<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.10.5.4>):

"The server is currently unable to handle the request due to a temporary
overloading or maintenance of the server. The implication is that this is a
temporary condition which will be alleviated after some delay."

Thus this is absolutely the wrong error class. If you don't want the client to
repeat the request, then signal a client error (4xx), not a server error (5xx).



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=99

           Summary: Risks Connected with Lock Tokens
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.19.7
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 19.  Security Considerations
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


"This specification requires the use of Universal Unique Identifiers (UUIDs) [9]
for lock tokens, in order to guarantee their uniqueness across space and time."

No, it doesn't (I realize RFC2518 said something similar, but it's still
inaccurate).

It goes on saying that UUIDs may reveal information you don't want to reveal,
but then stops. It *used* to say:

 "Section 24.2 of this specification details an alternate mechanism for	 		
	generating the "node" field of a UUID without using an IEEE 802			
	address, which alleviates the risks associated with exposure of IEEE			
	802 addresses by using an alternate source of uniqueness."

As we removed that part, we should now point to
<http://greenbytes.de/tech/webdav/rfc4122.html#node-id-no-id>



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=100

           Summary: "Notes on HTTP Client Compatibility" useful?
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.B.2
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Appendix B.  Appendices
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


This section is completely new, and I do not remember any prior discussion. Why
was it added? What problem does it solve?

In particular:

"First, if a PUT or DELETE request includes a header defined in this
specification (Depth or If), the server can assume the request comes from a
WebDAV-compatible client. The server may even be able to track a number of
requests across a session and know that a client is a WebDAV client. However,
this kind of detection may not be necessary."

What is this about? Why would a server care? Why *should* a server care?

"Since any HTTP client ought to handle unrecognized 400-level and 500-level
status codes as errors, the following new status codes should not present any
issues: 422, 423 and 507. 424 is also a new status code but it appears only in
the body of a Multistatus response. So, for example, if a HTTP client attempted
to PUT or DELETE a locked resource, the 423 Locked response ought to result in a
generic error presented to the user. ..."

Yes. This spec uses new response codes; as do others. I'm not sure why we need
to talk about this, unless it solves a specific problem I'm currently not aware of.

"The 207 Multistatus response is interesting because a HTTP client issuing a
DELETE request to a collection might interpret a 207 response as a success, even
though it does not realize the resource is a collection and cannot understand
that the DELETE operation might have been a complete or partial failure. Thus, a
server MAY choose to treat a DELETE of a collection as an atomic operation, and
use either 204 No Content in case of success, or some appropriate error response
(400 or 500 level) depending on what the error was."

That would contradict Section 9.2 (Delete,
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.9.2.p.7>):

"Upon execution, a method with a Depth header will perform as much of its
assigned task as possible and then return a response specifying what it was able
to accomplish and what it failed to do."

Do we want to change that requirement for DELETE?

"This approach would maximize backward compatibility. However, since
interoperability tests and working group discussions have not turned up any
instances of HTTP clients issuing a DELETE request against a WebDAV collection,
this concern may be more theoretical than practical."

Yes.

"Thus, servers MAY instead choose to treat any such DELETE request as a WebDAV
request, and send a 207 Multistatus containing more detail about what resources
could not be deleted."

The notion of a DELETE request sometimes beings a "WebDAV" request and sometimes
not is a completely new concept; and I think it's a bad idea as well. The same
HTTP message must mean the same thing, independantly of who is sending it (and
what it did before).



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=101

           Summary: Extensibility for dav:owner
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.13.20
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 13.  XML Element Definitions
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


"MAY be extended with child elements, mixed content, text content or attributes.
Structured content, for example one or more <href> child elements containing
URLs, is RECOMMENDED."

That's a SHOULD level requirement. I doubt we have interoperability for that.
Besides, what does that have to do with "extensibility", if the spec already
states it can have "ANY" content?

Just drop the paragraph.



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Subject: [Bug 102] New: lock tokens in examples
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=102

           Summary: lock tokens in examples
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.8.11.6
        OS/Version: other
            Status: NEW
          Severity: trivial
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


"Note that the locktoken and lockroot href elements would not contain any
whitespace. The line return appearing in this document is only for formatting."

I'd prefer to have the XML examples be valid. Such as:

        <D:locktoken> 
          <D:href
>opaquelocktoken:e71d4fae-5dec-22d6-fea5-00a0c91e6be4</D:href> 
        </D:locktoken>



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=103

           Summary: Start of introduction for DELETE confusing
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.8.7
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


The first sentence of the description of DELETE now says:

"Locks rooted on a resource MUST be destroyed in a successful DELETE of that
resource."

This is correct, but it's certainly not the right way to start the description
of DELETE.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=104

           Summary: Confusing new sentence in intro of COPY
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.8.9
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


Newly states:

"The state of the resource to be copied is fixed at the point the server begins
processing the COPY request."

Why this change, and what problem does it solve?



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Subject: [Bug 105] New: COPY for Collection Resources vs infinite loops
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=105

           Summary: COPY for Collection Resources vs infinite loops
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.8.9.3
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


Now says:

"A COPY of depth infinity instructs that the collection resource identified by
the Request-URI is to be copied to the location identified by the URI in the
Destination header, and all its internal member resources are to be copied to a
location relative to it, recursively through all levels of the collection
hierarchy. Servers should of course avoid infinite recursion, and can do so by
copying the source resource as it existed at the point where processing started."

The last sentence was added. I'm not sure why. Of course servers never should
run in an infinite loop, but that applies to all Depth-related operations. I'm
not sure why it's stated here, and furthermore I don't understand what the
suggested workaround is.



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Subject: [Bug 106] New: COPY and the Overwrite Header  vs merge behaviour desc added
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=106

           Summary: COPY and the Overwrite Header  vs merge behaviour desc
                    added
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.8.9.4
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


Interoperability testing has shown that some clients expect a	
			collection COPY to actually do a merge if a destination collection	
			exists. That behavior is appropriate for file system folders but not	
			necessarily for other data objects modelled as collections. Thus,	
			implementors are urged to comply with the standard language above,	
			and leave clients to perform a manual merge if that's the expected	
			behavior when copying a collection over another collection.
      
May be a useful remark, but I think it should either clearly marked as a
comment, or moved into an appendix (away from normative text)



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Subject: [Bug 107] New: Status 102 present; but status-uri response header removed
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=107

           Summary: Status 102 present; but status-uri response header
                    removed
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.10.1
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 10.  Status Code Extensions to HTTP/1.1
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


I note that în draft 05, the "status-uri" response header was removed (see
<http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.9.7>), but the "102
Processing" status was left in.

Either we have implementations and interoperability - then we need both - or we
should remove both.



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From w3c-dist-auth-request@frink.w3.org Wed Oct 12 09:22:50 2005
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Date: Wed, 12 Oct 2005 15:21:04 +0200
From: Julian Reschke <julian.reschke@gmx.de>
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To: Lisa Dusseault <lisa@osafoundation.org>
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        Cullen Jennings <fluffy@cisco.com>, WebDav <w3c-dist-auth@w3.org>,
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References: <OFA16D6C25.FEE47A7E-ON85257092.00012936-85257092.0001F502@us.ibm.com> <91df83c7d462717c7fa70fe05411113b@osafoundation.org>
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Lisa Dusseault wrote:
> That works for me, unless more feedback from implementors comes up quite 
> different.
> 
> Based on Julian's rewriting plus the discussion so far, here's some 
> proposed wording:
> 
> The value of a property appears inside the property name element. The value
> can be any kind of well-formed XML content: element content, text or mixed
> content. When the property value contains element or mixed content,
> namespaces that are in scope for that part of the XML document apply within
> the property value as well, and servers MUST preserve namespaces in server

s/namespaces/namespace names/

> storage for retransmission later. The server MAY preserve namespace 
> prefixes
> and non-significant whitespace.

1. Of course it *may* preserve namespace prefixes. I think this needs to 
be rephrased the other way around: clients MUST NOT rely on prefixes 
being preserved since some servers won't do that.

2. I don't understand the part about non-significant whitespace. Why was 
it introduced, and what issue does that resolve????

> For any values where specific prefix choices or whitespace matter (e.g. 
> property
> values containing XPath with prefixes), clients might need to force the 
> server to
> store the exact property value by encapsulating the value in a CDATA 
> section.

This is a bit misleading as it kind of suggests that this would allow to 
  use mixed or element content while preserving prefixes, which is not 
the case. Using CDATA will just result in the property value being a 
plain string, not tags.

Thus my preference still is to require servers to do the right thing. If 
we don't, the warning needs to be rephrased for example like this:

"Servers are not required to preserve namespace prefixes in property 
content, hence clients should not rely on them being preserved.  If 
preservation of prefixes is required (such as in XPath expressions), 
then it should be considered to use a different format for the value, 
such as plain text containing escaped XML)."

Best regards,

Julian




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------=_NextPart_000_0004_8776F5C4.787C9C29--





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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=108

elias@cse.ucsc.edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED





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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 11:06:35 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=109

           Summary: CONSISTENCY
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Disagreement over whether a DAV URI namespace needs to be consistent.

Issue raised by Roy Fielding:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1998OctDec/0155.html,
http://lists.w3.org/Archives/Public/w3c-dist-auth/2003AprJun/0106.html



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=110

           Summary: COMPLIANCE_RESOURCE
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Add a brief description to the text describing why we discuss compliance on a
per-resource basis.&#65533; Try to remove references to server compliance.

Mark D. Anderson raised this issue:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1998OctDec/0231.html



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=111

           Summary: DEFINE_PRINCIPAL
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 03.  Terminology
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


The term 'principal' is never defined in the WebDAV specification, or the HTTP
or Digest specifications. It should be defined.

Mark D. Anderson raised this issue:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1998OctDec/0234.html



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=112

           Summary: MKCOL_AND_302
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 11.  Use of HTTP Status Codes
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


The specification is ambiguous on the handling of 302 by MKCOL. It should
explicitly state that MKCOL is redirected by a 302.

Raised during the Advanced Collections conference call, 1/14/99.



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 11:13:07 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=113

           Summary: IMPLIED_LWS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 05.  Collections of Web Resources
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


The specification should explicitly note that the HTTP implied linear whitespace
rule also applies to productions in the WebDAV specification.

Raised by Jim Davis in private email, 1/31/99.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=114

           Summary: PUT_AND_INTERMEDIATE_COLLECTIONS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


HTTP/1.1 allows PUT to create intermediate collections during PUT operation.
WebDAV explicitly forbids this. This may cause problems with non-DAV-aware
HTTP/1.1 authoring clients which depend on this behavior, even though the
behavior is not guaranteed by HTTP/1.1 PUT.

Raised by Yoram Last:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999AprJun/0062.html



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Subject: [Bug 115] New: INTEROP_DELETE_AND_MULTISTATUS
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=115

           Summary: INTEROP_DELETE_AND_MULTISTATUS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 10.  Status Code Extensions to HTTP/1.1
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


An HTTP/1.1 authoring tool which issues a DELETE to a WebDAV server might
receive a 207 MultiStatus response, which it would not understand. Following
rules in the HTTP specification, it would then treat the 207 as a 200 (OK), and
incorrectly assume the operation succeeded.

Raised by Yoram Last:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999AprJun/0062.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 11:18:18 2005
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Subject: [Bug 116] New: OVERWRITE_DELETE_ALL_TOO_STRONG
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=116

           Summary: OVERWRITE_DELETE_ALL_TOO_STRONG
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


A COPY or a MOVE with Overwrite set to True will perform a DELETE with Depth
infinity at the destination of the operation. However, in the same situation,
most OS's will perform a merge, rather than a DELETE. It is feared the DELETE is
counter to users expectations.

Raised by Kevin Wiggen:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999AprJun/0053.html



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Subject: [Bug 117] New: WHEN_TO_MULTISTATUS_FOR_DELETE_1
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=117

           Summary: WHEN_TO_MULTISTATUS_FOR_DELETE_1
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


If a DELETE is issued to a collection, and it fails on all resources contained
by the collection, and on the collection itself, a server should report just a
single 4xx status code. But, instead the definition of DELETE indicates it
should return a multistatus since an error occurred on a resource other than the
Request-URI. The language needs to be tweaked so a multistatus is not required
in this case.

Raised by Yoram Last:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999AprJun/0118.html



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Subject: [Bug 118] New: WHEN_TO_MULTISTATUS_FOR_DELETE_2
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=118

           Summary: WHEN_TO_MULTISTATUS_FOR_DELETE_2
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


If a DELETE is issued to a collection, and it succeeds on all resources except
the Request-URI, then it is OK for the server to report a single failure code. A
multistatus response should be returned instead, and the language of DELETE
should be tweaked so this is the case.

Raised by Yoram Last:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999AprJun/0118.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 11:27:04 2005
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Subject: [Bug 119] New: DATE_FORMAT_GETLASTMODIFIED
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=119

           Summary: DATE_FORMAT_GETLASTMODIFIED
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 14.  DAV Properties
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


RFC 2518 specifies that the DAV:getlastmodified property must have the format
specified by the HTTP-date production in RFC 2068. However, HTTP-date allows
three date formats, rfc1123-date, rfc850-date, and asctime-date. Since RFC 2068
requires clients to accept all three time formats, this creates some ambiguity
for whether WebDAV clients should also accept all three. The WebDAV
specification should be updated to clarify that only the rfc1123-date production
should be used in DAV:getlastmodified.

Raised by Joe Orton:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999AprJun/0172.html



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Subject: [Bug 120] New: DEEP_LOCK_ERROR_STATUS
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=120

           Summary: DEEP_LOCK_ERROR_STATUS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Section 8.10.4 states that if a lock cannot be granted to all resources in a
hierarchy, a 409 status response must be issued. Yet, the example in section
8.10.10 which demonstrates this uses a 207.

Raised by Kevin Wiggen:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999AprJun/0196.html



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=121

           Summary: OVERWRITE_DELETE_ERROR_STATUS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


If a COPY or MOVE is submitted on a collection with Overwrite=T, if an error
occurs during the delete processing associated with the Overwrite header,
causing the entire operation to fail, what status should be returned?

Raised by Kevin Wiggen:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999AprJun/0196.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 11:33:24 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=122

           Summary: LOCK_ISSUES
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 06.  Locking
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Jason Crawford's list of lock issues sent to the list.

Raised by Jason Crawford:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999AprJun/0246.html

Note: This should be split into separate issues for tracking purposes...



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 11:34:19 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=123

           Summary: MULTISTATUS_FROM_MKCOL
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


If MKCOL is submitted with an entity body, as permitted by RFC 2518, to create a
collection and populate it, then it would make sense to return a 207 Multistatus
for errors. This possibility should be made more clear in the specification.

Raised by Jim Amsden:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999AprJun/0222.html



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=124

           Summary: REPORT_OTHER_RESOURCE_LOCKED
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 10.  Status Code Extensions to HTTP/1.1
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


In some cases, such as when the parent collection of a resource is locked, a 423
(Locked) status code is returned even though the resource identified by the
Request-URI is not locked. This can be confusing, since it is not possible for a
client to easily discover which resource is causing the locked status code to be
returned. An improved status report would indicate the resource causing the lock
message.

Raised by Kevin Wiggen:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999JulSep/0039.html
(Point #1)



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 11:38:01 2005
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Subject: [Bug 125] New: COPY_INTO_YOURSELF_CLARIFY
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=125

           Summary: COPY_INTO_YOURSELF_CLARIFY
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


RFC 2518 doesn't explicitly specify how to handle the case where a COPY with
Depth infinity has a destination that is within the source hierarchy. For
example, a COPY of Depth infinity of /A/ into /A/B/. One resolution is to state
that the copy must behave as if the resources are first copied to a temporary
location, then moved from the temporary location into the destination.

Raised during the Sept. 29, 1999 Advanced Collections teleconference.



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 11:39:33 2005
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Subject: [Bug 126] New: EXTEND_UNDEFINED
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=126

           Summary: EXTEND_UNDEFINED
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


The definition of the DAV header in section 9.1 uses a production called
'extend', which is undefined in either this, or the HTTP/1.1 spec.

Caught by Juergen Reuter:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999OctDec/0198.html
also
http://lists.w3.org/Archives/Public/w3c-dist-auth/2000AprJun/0057.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 11:40:43 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=127

           Summary: PUT_ON_COLLECTION
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Currently, the language in section 8.7.2 does not state that a PUT is permitted
on a collection. On the flip side, it doesn't state that this is forbidden
either. It's just silent. The spec. should explicitly state that PUT is (or is
not) permitted on a collection.

Raised during the Nov. 8, 1999 Advanced Collections breakout at IETF-46.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=128

           Summary: LEVEL_OR_CLASS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: minor
          Priority: P2
         Component: 03.  Terminology
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


When describing compliance, the terms 'level' and 'class' are both used in the
specification. Section 9.1 uses the term 'level', while Section 15 uses the term
'class'. The specification should pick one and be consistent.

Raised during the Nov. 8, 1999 Advanced Collections breakout at IETF-46.



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Subject: [Bug 129] New: LOCK_BODY_SHOULD_BE_MUST
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=129

           Summary: LOCK_BODY_SHOULD_BE_MUST
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Section 8.10.1 states that a LOCK method request SHOULD have an XML request
body. This SHOULD should instead be MUST.

Raised by Greg Stein:
http://lists.w3.org/Archives/Public/w3c-dist-auth/1999OctDec/0224.html



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=130

           Summary: IF_AND_AUTH
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 06.  Locking
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


The fact that use of authentication credentials with submission of lock tokens
is required should be strengthened in the document.

Raised by Geoff Clemm:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2000JanMar/0211.html



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Subject: [Bug 131] New: DISPLAYNAME
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=131

           Summary: DISPLAYNAME
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 14.  DAV Properties
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


There is confusion over the definition and use of the displayname property that
has led to varying implementations. The default value of displayname should be
specified. The behavior of displayname when there are multiple URLs for the
resource needs to be clarified.

Raised by Rickard Falk:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2000JanMar/0108.html



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Subject: [Bug 132] New: DEPTH_LOCK_AND_IF
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=132

           Summary: DEPTH_LOCK_AND_IF
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


The specification is currently silent on how to use the If header for submitting
a locktoken when performing a DELETE in a Depth infinity locked collection.
Should the If header have both the collection URL and the Request-URI, or just
the Request-URI? An example of this is needed.

Raised by Joe Orton and Greg Stein on dav-dev list:
http://dav.lyra.org/pipermail/dav-dev/2000-March/000830.html



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Subject: [Bug 133] New: LOCK_SEMANTICS
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=133

           Summary: LOCK_SEMANTICS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 03.  Terminology
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


At present, the WebDAV specification is not excruciatingly explicit that writing
to a locked resource requires the combination of the lock token, plus an
authentication principal. At one point, the spec. discusses an 'authorized'
principal, but 'authorized' is never explicitly defined.

Raised at the Redmond, WA DeltaV design team meeting.



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Subject: [Bug 134] New: PROPFIND_INFINITY
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=134

           Summary: PROPFIND_INFINITY
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 19.  Security Considerations
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


If a client quickly submits multiple PROPFIND, Depth: infinity requests to the
top of a collection tree containing many resources, it effectively forms a
denial of service (DoS) attack. Though this is noted at a high level in Section
17.2 in Security Considerations, the specific risks of a large PROPFIND should
be noted there. Additionally, the specification should note whether a server is
allowed to have a configuration option to disable Depth: inifinity PROPFINDs. It
has been recommended that 403 (Forbidden) be returned if a server does not
support Depth: infinity PROPFIND. Integer values other than 0 and 1 in PROPFIND
requests were also proposed.

Raised by Hartmut Warncke, Greg Stein:
http://dav.lyra.org/pipermail/dav-dev/2000-July/001320.html
http://lists.w3.org/Archives/Public/w3c-dist-auth/2000JulSep/0005.html

See also Jim Davis' analysis of options at:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2000JulSep/0025.html



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Subject: [Bug 135] New: RESOURCETYPE_EXTENSION
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=135

           Summary: RESOURCETYPE_EXTENSION
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 14.  DAV Properties
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Both versioning and access control have a need to have multiple values within
the DAV:resourcetype property. The specification needs to explicitly state that
these multiple values are allowable, and that clients should expect this. At
least one example should demonstrate that.

Raised during the Pittsburgh IETF meeting, in the DeltaV and Access Control
breakouts.

Resolved: that the examples will include multiple resource types
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0102.html



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Subject: [Bug 136] New: LOCKS_SHOULD_THEY_USE_AN_IF_HEADER_TO_VERIFY
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=136

           Summary: LOCKS_SHOULD_THEY_USE_AN_IF_HEADER_TO_VERIFY
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Is the complexity of the IF header appropriate for the simple task of verifying
that a client knowingly owns a lock&#65533; The IF header seems to serve a different
purpose. One of those purposes is for the server to verify that you have the
lock token (and that you know the root of it?). Another is for the client to
check some preconditions before doing an action. Another seems to be to specify
what lock to refresh in a lock refresh request. This seems to create ambiguity
in our definition of the semantics of the IF: header.

Raised by Jason Crawford: Feb 2001

Post: http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0055.html :
It is felt by the group that it's important that the client not just own and
hold the lock token, but that it also know where the lock is rooted before it
does tasks related to that lock. This still leaves the lock referesh issue
unresolved.



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Subject: [Bug 137] New: OPTIONS_RESPONSE_VARIES_FOR_RESOURCES
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=137

           Summary: OPTIONS_RESPONSE_VARIES_FOR_RESOURCES
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Should the response for an OPTIONS request be expected to vary from resource to
resource? What should we proscribe&#65533; What about an example for file, directories
and null resources?

Raised by Kevin Wiggins:
http://lists.w3.org/Archives/Public/ietf-dav-versioning/2001JanMar/0539.html



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Subject: [Bug 138] New: UNLOCK_WHAT_URL
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=138

           Summary: UNLOCK_WHAT_URL
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 06.  Locking
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


What do you return if the unlock request specifies a URL on which the lock does
not reside&#65533; What if it's on a URL that is locked by the lock, but it's not the
resource where the lock is rooted?
	
Raised by Juergen Pill:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001JanMar/0086.html
	
Resolved that you can specify any URL locked by the lock you want to unlock:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/0027.html
We should resolve the issue of UNLOCKing other URLs in a few days.



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:07:33 2005
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Subject: [Bug 139] New: MUST_AN_IF_HEADER_CHECK_THE_ROOT_OF_URL
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=139

           Summary: MUST_AN_IF_HEADER_CHECK_THE_ROOT_OF_URL
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Right now the server uses the IF: header to verify that a client knows what
locks it has that are affected by an operation before it allows the operation.
Must the client provide the root URL of a lock, any URL for a pertainent loc, or
some specific URL in the IF: header.

Post:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0055.html
It is felt by the group that it's important that the client not just own and
hold the lock token, but that it also know where the lock is rooted before it
does tasks related to that lock. This is just a point of info. The issue itself
still needs to be brought up and answered.still



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:08:51 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=140

           Summary: UNLOCK_NEEDS_IF_HEADER
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Shouldn't we be using an IF header to do an UNLOCK seeing as you need to prove
you are holding a lock before you can remove it&#65533; (This might be contingent on
LOCKS_SHOULD_THEY_USE_AN_IF_HEADER_TO_VERIFY)

Raised by Dan Brotsky:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001JanMar/0099.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:17:55 2005
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Subject: [Bug 141] New: UNLOCK_WITHOUT_GOOD_TOKEN
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=141

           Summary: UNLOCK_WITHOUT_GOOD_TOKEN
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


What should UNLOCK return if a bad token is provided or no token. (This might be
contingent on UNLOCK_NEEDS_IF_HEADER.)

Raised by Dan Brotsky:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001JanMar/0099.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:18:46 2005
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Subject: [Bug 142] New: URL_ENCODING_ISSUES
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=142

           Summary: URL_ENCODING_ISSUES
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


We have to resolve some issues involving encoding methods for URIs. The
discussion is very involved.

Raised by Greg Stein:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001JanMar/0081.html



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Subject: [Bug 143] New: LOCK_RENEWAL_SHOULD_NOT_USE_IF_HEADER
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=143

           Summary: LOCK_RENEWAL_SHOULD_NOT_USE_IF_HEADER
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


The LOCK renewal request should not us an IF header to specify what lock is
being renewed. This limits the use of the IF header.

Raised by Dan Brotsky:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001JanMar/0109.html



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Subject: [Bug 144] New: IF_HEADER_CHECKS_AFTER_OTHER_CHECKS
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=144

           Summary: IF_HEADER_CHECKS_AFTER_OTHER_CHECKS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Should we document if the IF header is evaluated before methods specific checks
of afterwards. The IF header is said to be modeled after the IF-MATCH header and
the documentation for that says that method specific checks should come first.
It's not clear if it's feasible to make all method specific checks before
checking the IF header. It's also probably easier to implement IF header checks
at a common layer of code that is called before the method specific code in many
implementations.



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:23:39 2005
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Subject: [Bug 145] New: LOCKDISCOVERY_ON_UNLOCKED_RESOURCE
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=145

           Summary: LOCKDISCOVERY_ON_UNLOCKED_RESOURCE
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 14.  DAV Properties
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


If the DAV:lockdiscovery property is requested from an unlocked resource, what
is the correct response? Apache mod_dav sends an empty lockdiscovery element
(<D:lockdiscovery/>) while IIS sends an empty prop element (<D:prop/>), that is,
it sends no lockdiscovery element at all.

Raised by Hartmut Warncke:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001JanMar/0128.html



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Subject: [Bug 146] New: PROP_ROUNDTRIP
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=146

           Summary: PROP_ROUNDTRIP
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 14.  DAV Properties
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


The specification is currently unclear as to how a server should handle the
round-trip representation of property information. That is, if a client does a
PROPPATCH/PROPFIND pair, what can it expect about the property value that is
returned, as compared to the original property value it wrote. Some XML
attributes have semantics that would allow a server to return XML that was
semantically the same as the original, but was a different sequence of octets
than the original. It is also possible that the protocol specification should be
silent on this issue. An example of this ambiguity is whitespace.
	

Raised during discussion of the PROP_ATTR issue:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001AprJun/0047.html
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001AprJun/0052.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:26:58 2005
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Subject: [Bug 147] New: CLARIFY_UNTAGGED_IF_HEADER_APPLICATION
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=147

           Summary: CLARIFY_UNTAGGED_IF_HEADER_APPLICATION
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


2518 says the untagged header should be applied to all resources involved in a
request, but that is not defined. There was also a proposal at the SLC IETF
meeting to simply the IF header or move it to its own spec. Also a proposal to
remove UNTAGGED IF: header support.

Raised by Geoff Clemm:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001JulSep/0159.html
and IETF meeting:
http://www.ietf.org/proceedings/01dec/minutes/WEBDAV.HTM



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Subject: [Bug 148] New: SECTION_12_4_MENTIONS_HREF_ELEMENT
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=148

           Summary: SECTION_12_4_MENTIONS_HREF_ELEMENT
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Section 12.4 talks about an href element when describing the link element. There
is no such element defined as a child of link. Fix this.



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Subject: [Bug 149] New: NEW_MULTIPUT_METHOD
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=149

           Summary: NEW_MULTIPUT_METHOD
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Review discussion of October 2001 to see if there is consensus around a MULTIPUT
method.

Raised by Jim Whitehead:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001OctDec/0094.html



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=150

           Summary: SOURCE_PROPERTY_UNDERSPECIFIED
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 14.  DAV Properties
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


The concepts of dynamic resources and the details of the source property are not
well defined and to some degree this might be limiting implementation. What is
our policy on PUT on a dynamic resource? What/who creates the relationship
between the source and the dest&#65533; How does a client know how to describe the
constituent pieces of source in a UI&#65533; Are the src and dst reversed in 2518? What
property values does PROPFIND return for a dynamic resource? Can the dav:source
property be written by the client? -- There also was a proposal at the SLC IETF
meeting to separate the DAV:source property in to it's own spec.

See discussion following:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001OctDec/0094.html
and a proposal at
http://lists.w3.org/Archives/Public/w3c-dist-auth/2001OctDec/0119.html
	

Almost resolved to remove the dav:source property from the spec to give us a
clean slate to work with if we want to add a more completely specified version
of that functionality later. It looks like there might be an effort to define it
as of 5/13/02.

See:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0099.html
-- 8/27/02 still no interoperable implementations.



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:32:33 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=151

           Summary: HOW_DO_WE_ENCODE_FILENAMES_AS_URLS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


It has been suggested that WebDAV should define the mapping of external names
(file system names for example) to URL encoded names.

Raised by Larry Masinter:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0204.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:34:08 2005
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Subject: [Bug 152] New: SHOULD_A_SERVER_DETERMINE_MIMETYPE_OF_CONTENT
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=152

           Summary: SHOULD_A_SERVER_DETERMINE_MIMETYPE_OF_CONTENT
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


How should the mimetype of the PUT request affect the mimetype of subsequent GET
requests? Should it be remembered&#65533; If so, does the last PUT request take
priority? Or the first? Or do we leave that unspecified? The solution should
include coverage of what kind of resource should get created if one locks an
unmapped URL.

Raised by Dan Brotsky in the following thread:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0209.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:35:18 2005
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Subject: [Bug 153] New: CAN_HREF_BE_RELATIVE
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=153

           Summary: CAN_HREF_BE_RELATIVE
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 14.  DAV Properties
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Can DAV:HREF be a relative URI? If so, can the spec specify what it's relative to?

Partially resolved -- Agreed that it can be relative, but no significant
discussion on what it is relative to:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0241.html



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Subject: [Bug 154] New: ADD_DEPTH_ZERO_DELETE
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=154

           Summary: ADD_DEPTH_ZERO_DELETE
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


It has been suggested that we should have the ability to delete at depth zero.

Suggested by Geoff Clemm et al:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0152.html



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Subject: [Bug 155] New: INTEROPERABILITY_OF_102PROCESSING_STATUS_DEMONSTRATED
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=155

           Summary: INTEROPERABILITY_OF_102PROCESSING_STATUS_DEMONSTRATED
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 11.  Use of HTTP Status Codes
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Have we demonstrated interoperability of the '102 Processing' status response code?

Discussion begins with:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0169.html



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Subject: [Bug 156] New: HOW_ARE_TRAILING_SLASHES_USED
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=156

           Summary: HOW_ARE_TRAILING_SLASHES_USED
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


There are all kinds of issues with trailing slashes. Can a client simply add or
remove them? Does a server treat two URLs only differing by trailing slashes&#65533;
Should a server redirect to the preferred URL?

http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0201.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:40:15 2005
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Subject: [Bug 157] New: REMOVE_ETAG_SUPPORT_FOR_IF_HEADER
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=157

           Summary: REMOVE_ETAG_SUPPORT_FOR_IF_HEADER
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


It was suggested that we remove the ETAG support in the IF header because it
doesn't seem to be used right now (no interop) and the same thing can be
achieved via other mechanisms.

See:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0045.html

In that thread it seems to be almost resolved that we eliminate the ETAG support
from IF: headers in that anyone who cared seemed to prefer removing it, but the
discussion got diverted and no final decision was made. Again on
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/0081.html but it
was actively used in subsequent discussions on the IF: header and strongly
advocated there Sept/Oct 2002.



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:42:13 2005
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Subject: [Bug 158] New: SHOULD_WE_SUPPORT_IRIS_AND_CHARMOD
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=158

           Summary: SHOULD_WE_SUPPORT_IRIS_AND_CHARMOD
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 18.  Internationalization Considerations
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


There are various recent documents about internationalization of standards. We
should see if we're compliant with the IRI (internationalized resource
identifiers, draft-durst-iri-00) and charmod and if we're not, what it would
take to bring us in to compliance.

See:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/0070.html

Jason and Lisa have begun reading. IRIs look like they might become a problem.
Further reading necessary.



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:44:35 2005
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Subject: [Bug 159] New: ORDER_OF_HEADER_EVALUATION
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=159

           Summary: ORDER_OF_HEADER_EVALUATION
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


It was suggested that we require that the authetication and permission
information for a request be evaluated before the If: header. This allows one to
test if a long operation will succeed by submitting an equivalent shorter one
with a false If: header.

Summarized by Geoff Clemm:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/0369.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:44:44 2005
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Subject: [Bug 160] New: IF_HEADERS_CAN_GET_LONG
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=160

           Summary: IF_HEADERS_CAN_GET_LONG
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


If headers can become quite long. We need a way to make sure we don't exceed the
maximum header length.

Geoff Clemm: Point 2 of
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002OctDec/0039.html



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Subject: [Bug 161] New: EVALUATE_ALL_OF_IF_HEADER
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=161

           Summary: EVALUATE_ALL_OF_IF_HEADER
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


2518 says that a server only needs to evaluate the portions of the If: header
that it finds appropriate. This underminds the stated primary purpose of the If
header: for the client to submit assertions on the request because the server
might ignore a few assertions and just go ahead with a request and the client
doesn't know if the assertions were evaluated or not.

Jason Crawford:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002OctDec/0083.html

Approved heartily right after proposed.



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Subject: [Bug 162] New: REMOVE_UNTAGGED_IF_HEADER
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=162

           Summary: REMOVE_UNTAGGED_IF_HEADER
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


It was propose to remove support for untagged IF headers in order to simplify
the If: header.

See:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002OctDec/0025.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:48:12 2005
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	Thu, 13 Oct 2005 09:46:26 -0700
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Subject: [Bug 163] New: REMOVE_NOT_SUPPORT_FROM_IF_HEADERS
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=163

           Summary: REMOVE_NOT_SUPPORT_FROM_IF_HEADERS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


There doesn't seem to be many (or any?) clients that use the NOT support of the
If Header. Thus we have no interop testing. Yet it was mentioned as something
that might be helpful to let clients submit lots of lock tokens in discussions
on rewriting the IF: header in October 2002. Those discussions are complete as
of entry of this issue in this file.

See:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/0087.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:49:45 2005
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Subject: [Bug 164] New: HOW_DOES_WEBDAV_SUPPORT_VARIANTS
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=164

           Summary: HOW_DOES_WEBDAV_SUPPORT_VARIANTS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


How does WebDAV support variants?

A discussion thread was started. Let's not forget about it. WHERE?



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:51:12 2005
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=165

           Summary: DAV_ERROR_SUPPORT
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 14.  DAV Properties
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


It was suggested that 2518 adopt the DAV:error support that the WebDAV
versioning spec (rfc3253) supports. See that spec and search on 'error' and
'must-be'.

http://lists.w3.org/Archives/Public/w3c-dist-auth/2002OctDec/0114.html



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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 12:53:34 2005
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Subject: [Bug 166] New: XML_GUIDELINES_CONFORMANCE
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=166

           Summary: XML_GUIDELINES_CONFORMANCE
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


The IESG has approved the Internet-Draft 'Guidelines for The Use of XML within
IETF Protocols' <draft-hollenbeck-ietf-xml-guidelines-07.txt> as a BCP. This has
been reviewed in the IETF but is not the product of an IETF Working Group. We
need to evaluate if we are in compliance with these guidelines.



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Subject: [Bug 167] New: XML_ENTITY_DOS
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=167

           Summary: XML_ENTITY_DOS
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 19.  Security Considerations
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


Recursive entity declarations can be used for effective DOS attacks, and thus
WebDAV MUST allow servers to reject these kind of requests, even though they may
be well-formed).

http://lists.w3.org/Archives/Public/w3c-dist-auth/2003JanMar/0402.html



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=13

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=15

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=16

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=17

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=17

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=18

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=18

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=19

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=22

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=20

lisa@osafoundation.org changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=24

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=24

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------- Additional Comments From lisa@osafoundation.org  2005-10-13 10:49 -------
Todo: be more specific about how this doesn't make the two operations atomic and propose to list.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=25

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=26

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=26

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=26

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=28

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=29

lisa@osafoundation.org changed:

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------- Additional Comments From lisa@osafoundation.org  2005-10-13 10:54 -------
what I will do: review changes carefully and accept them and post to list



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=30

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=30

lisa@osafoundation.org changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=32

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=34

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=34

julian.reschke@greenbytes.de changed:

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=34

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=36

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------- Additional Comments From lisa@osafoundation.org  2005-10-13 11:00 -------
It appears I put the appendix number explicitly in the XML -- I should remove that.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=36

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=37

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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=37

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From w3c-dist-auth-request@frink.w3.org Thu Oct 13 14:12:26 2005
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Date: Thu, 13 Oct 2005 11:10:39 -0700
From: Elias Sinderson <elias@soe.ucsc.edu>
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Cullen Jennings wrote:

>Elias kindly volunteered to collect all the know issues and put them in bugzilla.
>
I've added all of the 'open' issues listed at 
<http://www.webdav.org/wg/rfcdev/issues.htm> -- TBD how to handle issues 
marked as 'edit', 'InBis', '2518bis', 'Version2', or 'closed'.

>He is going to tell us how he will mark in bugzilla two different states. One state is when the WG agrees on general way to resolved the issue but has not updated drafts yet or figured out exact text, and other state is
>when the actual text has been put into the draft.
>  
>
I actually see a need for more than two states: New, Assigned (accepted 
by WG for discussion), Resolved (some resolution reached on the list, 
editorial or otherwise), Closed (resolution is in current draft). Comments?


Cheers,
Elias




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There are some language changes proposed by Julian that I'm OK with,  
but it's clear we're thinking a little differently about whitespace --  
read down a bit for that discussion and questions for client and server  
implementors.

On Oct 12, 2005, at 6:21 AM, Julian Reschke wrote:

> Lisa Dusseault wrote:
>> That works for me, unless more feedback from implementors comes up  
>> quite different.
>> Based on Julian's rewriting plus the discussion so far, here's some  
>> proposed wording:
>> The value of a property appears inside the property name element. The  
>> value
>> can be any kind of well-formed XML content: element content, text or  
>> mixed
>> content. When the property value contains element or mixed content,
>> namespaces that are in scope for that part of the XML document apply  
>> within
>> the property value as well, and servers MUST preserve namespaces in  
>> server
>
> s/namespaces/namespace names/
Sure.

>
>> storage for retransmission later. The server MAY preserve namespace  
>> prefixes
>> and non-significant whitespace.
>
> 1. Of course it *may* preserve namespace prefixes. I think this needs  
> to be rephrased the other way around: clients MUST NOT rely on  
> prefixes being preserved since some servers won't do that.
I don't mind either way of wording this.

>
> 2. I don't understand the part about non-significant whitespace. Why  
> was it introduced, and what issue does that resolve????
First assumption: that there is non-significant whitespace, based on  
reading the XML recommendation

For example, if my property name value in PROPPATCH request is

	<D:myprop xmlns:D="DAV:">
		<myvalue xmlns="http://example.org/schema">
			<stuff/><morestuff/>
		</myvalue>
	</D:myprop>

Then in this case, I believe all line returns and tabs introduced here  
are non-significant.

Second assumption:  that a server might strip non-significant  
whitespace either at the beginning or end of the property value if it's  
a XML value.  So a server could return in a PROPFIND response:


	<D:myprop xmlns:D="DAV:"><myvalue xmlns="http://example.org/schema">
			<stuff/><morestuff/>
		</myvalue></D:myprop>

(Conversely, a server could *add* whitespace in the locations I just  
removed whitespace.)

Third assumption/evaluation: that a server might reasonably strip  
non-significant whitespace in the *middle* of an XML property value.   
So a server could also return


	<D:myprop xmlns:D="DAV:"><myvalue  
xmlns="http://example.org/schema"><stuff/><morestuff/></myvalue></D: 
myprop>

(if this line wraps in your email reader, it was intended to be a  
single line with no returns)

Why might a server do this?  If XML property values were stored as XML  
trees for fast searching and processing, then the text representation  
of the value could be reconstructed easily if whitespace did not need  
to be preserved exactly as is.

If these assumptions are wrong or there's consensus that whitespace  
rewriting is unreasonable, then I'd have to rewrite this text.

IMPLEMENTORS: Do any servers rewrite whitespace in or before or after  
property values?  Do any client implementors have assumptions either  
way about this?


>
>> For any values where specific prefix choices or whitespace matter  
>> (e.g. property
>> values containing XPath with prefixes), clients might need to force  
>> the server to
>> store the exact property value by encapsulating the value in a CDATA  
>> section.
>
> This is a bit misleading as it kind of suggests that this would allow  
> to  use mixed or element content while preserving prefixes, which is  
> not the case. Using CDATA will just result in the property value being  
> a plain string, not tags.
>
> Thus my preference still is to require servers to do the right thing.  
> If we don't, the warning needs to be rephrased for example like this:
>
> "Servers are not required to preserve namespace prefixes in property  
> content, hence clients should not rely on them being preserved.  If  
> preservation of prefixes is required (such as in XPath expressions),  
> then it should be considered to use a different format for the value,  
> such as plain text containing escaped XML)."

Sure, I can call it plain text.

Lisa





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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=29

lisa@osafoundation.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|joe-bugzilla@cursive.net    |lisa@osafoundation.org
             Status|ASSIGNED                    |NEW





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Lisa Dusseault wrote:
> 
> There are some language changes proposed by Julian that I'm OK with,  
> but it's clear we're thinking a little differently about whitespace --  
> read down a bit for that discussion and questions for client and server  
> implementors.
> 
> ...
 >
>> 2. I don't understand the part about non-significant whitespace. Why  
>> was it introduced, and what issue does that resolve????
> 
> First assumption: that there is non-significant whitespace, based on  
> reading the XML recommendation
> 
> For example, if my property name value in PROPPATCH request is
> 
>     <D:myprop xmlns:D="DAV:">
>         <myvalue xmlns="http://example.org/schema">
>             <stuff/><morestuff/>
>         </myvalue>
>     </D:myprop>
> 
> Then in this case, I believe all line returns and tabs introduced here  
> are non-significant.

But they are. See 
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.4.4.p.7>:

"The XML attribute xml:space MUST NOT be used to change white space 
handling. White space in property values is significant."

> Second assumption:  that a server might strip non-significant  
> whitespace either at the beginning or end of the property value if it's  
> a XML value.  So a server could return in a PROPFIND response:
> 
> 
>     <D:myprop xmlns:D="DAV:"><myvalue xmlns="http://example.org/schema">
>             <stuff/><morestuff/>
>         </myvalue></D:myprop>
> 
> (Conversely, a server could *add* whitespace in the locations I just  
> removed whitespace.)

That would be a bug according to the current draft.

> Third assumption/evaluation: that a server might reasonably strip  
> non-significant whitespace in the *middle* of an XML property value.   
> So a server could also return
> 
> 
>     <D:myprop xmlns:D="DAV:"><myvalue  
> xmlns="http://example.org/schema"><stuff/><morestuff/></myvalue></D: 
> myprop>
> 
> (if this line wraps in your email reader, it was intended to be a  
> single line with no returns)
> 
> Why might a server do this?  If XML property values were stored as XML  
> trees for fast searching and processing, then the text representation  
> of the value could be reconstructed easily if whitespace did not need  
> to be preserved exactly as is.
> 
> If these assumptions are wrong or there's consensus that whitespace  
> rewriting is unreasonable, then I'd have to rewrite this text.

Actually what I'm asking for is that we don't change the text unless 
there clearly is a consensus to do so. The current spec says whitespace 
is significant, and as far as I can tell, nobody has asked for a change 
of that.

> ...

Best regards, Julian




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On Oct 13, 2005, at 12:07 PM, Julian Reschke wrote:

> Actually what I'm asking for is that we don't change the text unless 
> there clearly is a consensus to do so. The current spec says 
> whitespace is significant, and as far as I can tell, nobody has asked 
> for a change of that.
>

Fair enough, although now I'm thinking we should be specific about XML 
values, and about the beginning/end of the value as well as the middle. 
  I was thinking that the existing text in 2518 applied only to text 
property values.

I'm still very curious to hear what implementations do/assume; that's 
good input to see if the consensus is consistent with the spec.

lisa





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Lisa Dusseault wrote:
>=20
>=20
> On Oct 13, 2005, at 12:07 PM, Julian Reschke wrote:
>=20
>> Actually what I'm asking for is that we don't change the text unless=20
>> there clearly is a consensus to do so. The current spec says=20
>> whitespace is significant, and as far as I can tell, nobody has asked=20
>> for a change of that.
>>
>=20
> Fair enough, although now I'm thinking we should be specific about XML=20
> values, and about the beginning/end of the value as well as the middle.=
=20
>  I was thinking that the existing text in 2518 applied only to text=20
> property values.

 From <http://www.webdav.org/wg/rfcdev/issues.htm>:

--
107
=09
IS_XMLSPACE_SIGNIFICANT
=09
Edit
=09
InBis
=09
Should the xml:space attribute be respected.=EF=BF=BD 2518bis on 6/1/02 s=
ays it=20
should not. There is some debate on this.
=09
Re-raised:=20
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0137.html
=09
The conclusion of the May/June 2002 discussion was that white space is=20
significant:=20
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0152.html
--

So the old issues list says this was discussed, that there was=20
consensus, and that rfc2518bis has been changed accordingly.

If you want to re-open the issue, please do so (but in a different=20
thread). If you do, please make sure to clarify what was wrong the=20
resolution we reached back then.

> I'm still very curious to hear what implementations do/assume; that's=20
> good input to see if the consensus is consistent with the spec.

Do you have any data about servers that get that wrong? That would be=20
interesting indeed.

Best regards, Julian





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--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the WWW Distributed Authoring and Versioning Working Group of the IETF.

	Title		: Web Distributed Authoring and Versioning
                          (WebDAV) Redirect Reference Resources
	Author(s)	: J. Whitehead, et al.
	Filename	: draft-ietf-webdav-redirectref-protocol-13.txt
	Pages		: 32
	Date		: 2005-10-13
	
This specification defines redirect reference resources.  A redirect
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--Apple-Mail-13-603293098
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I guess what's giving me so much cognitive dissonance here is that=20
prefixes now are not preserved but whitespace is.  That seems=20
inconsistent to me -- if some XML rewriting is OK but other XML isn't,=20=

what's the difference.

Lisa

On Oct 13, 2005, at 12:36 PM, Julian Reschke wrote:

> Lisa Dusseault wrote:
>> On Oct 13, 2005, at 12:07 PM, Julian Reschke wrote:
>>> Actually what I'm asking for is that we don't change the text unless=20=

>>> there clearly is a consensus to do so. The current spec says=20
>>> whitespace is significant, and as far as I can tell, nobody has=20
>>> asked for a change of that.
>>>
>> Fair enough, although now I'm thinking we should be specific about=20
>> XML values, and about the beginning/end of the value as well as the=20=

>> middle.  I was thinking that the existing text in 2518 applied only=20=

>> to text property values.
>
> =46rom <http://www.webdav.org/wg/rfcdev/issues.htm>:
>
> --
> 107
> =09
> IS_XMLSPACE_SIGNIFICANT
> =09
> Edit
> =09
> InBis
> =09
> Should the xml:space attribute be respected.=A1Z 2518bis on 6/1/02 =
says=20
> it should not. There is some debate on this.
> =09
> Re-raised:=20
> http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0137.html
> =09
> The conclusion of the May/June 2002 discussion was that white space is=20=

> significant:=20
> http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0152.html
> --
>
> So the old issues list says this was discussed, that there was=20
> consensus, and that rfc2518bis has been changed accordingly.
>
> If you want to re-open the issue, please do so (but in a different=20
> thread). If you do, please make sure to clarify what was wrong the=20
> resolution we reached back then.
>
>> I'm still very curious to hear what implementations do/assume; that's=20=

>> good input to see if the consensus is consistent with the spec.
>
> Do you have any data about servers that get that wrong? That would be=20=

> interesting indeed.
>
> Best regards, Julian
>

--Apple-Mail-13-603293098
Content-Type: text/enriched;
	charset=BIG5
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I guess what's giving me so much cognitive dissonance here is that
prefixes now are not preserved but whitespace is.  That seems
inconsistent to me -- if some XML rewriting is OK but other XML isn't,
what's the difference.


Lisa


On Oct 13, 2005, at 12:36 PM, Julian Reschke wrote:


<excerpt>Lisa Dusseault wrote:

<excerpt>On Oct 13, 2005, at 12:07 PM, Julian Reschke wrote:

<excerpt>Actually what I'm asking for is that we don't change the text
unless there clearly is a consensus to do so. The current spec says
whitespace is significant, and as far as I can tell, nobody has asked
for a change of that.


</excerpt>Fair enough, although now I'm thinking we should be specific
about XML values, and about the beginning/end of the value as well as
the middle.  I was thinking that the existing text in 2518 applied
only to text property values.

</excerpt>

=46rom <<http://www.webdav.org/wg/rfcdev/issues.htm>:


--

107

=09

IS_XMLSPACE_SIGNIFICANT

=09

Edit

=09

InBis

=09

Should the xml:space attribute be
respected.<fontfamily><param>LastResort</param>=A1Z</fontfamily> 2518bis
on 6/1/02 says it should not. There is some debate on this.

=09

Re-raised:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0137.html

=09

The conclusion of the May/June 2002 discussion was that white space is
significant:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0152.html

--


So the old issues list says this was discussed, that there was
consensus, and that rfc2518bis has been changed accordingly.


If you want to re-open the issue, please do so (but in a different
thread). If you do, please make sure to clarify what was wrong the
resolution we reached back then.


<excerpt>I'm still very curious to hear what implementations
do/assume; that's good input to see if the consensus is consistent
with the spec.

</excerpt>

Do you have any data about servers that get that wrong? That would be
interesting indeed.


Best regards, Julian


</excerpt>=

--Apple-Mail-13-603293098--





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Lisa Dusseault wrote:
> I guess what's giving me so much cognitive dissonance here is that 
> prefixes now are not preserved but whitespace is. That seems 
> inconsistent to me -- if some XML rewriting is OK but other XML isn't, 
> what's the difference.

Well. Both are part of the XML Infoset and the XPath model, so there are
two independant W3C specs that consider them significant. That's why I'd
like servers to preserve both.

Maybe we should reconsider the issue? I think we have three servers
(SAP|Xythos|moddav) that can handle XML at all, so if there's a minimum
chance we can get all of them to preserve prefixes, we should just make
that the requirement.

Best regards, Julian




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Hi,

this draft (hopefully) resolves the issue raised by Jake Baumgarten 
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-redirectref-protocol-issues.html#8.1_deep_lock_complexity>). 
during WGLC. As far as I can tell, it is ready to be submitted for 
publication as Experimental RFC.

Best regards, Julian



Internet-Drafts@ietf.org wrote:
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the WWW Distributed Authoring and Versioning Working Group of the IETF.
> 
> 	Title		: Web Distributed Authoring and Versioning
>                           (WebDAV) Redirect Reference Resources
> 	Author(s)	: J. Whitehead, et al.
> 	Filename	: draft-ietf-webdav-redirectref-protocol-13.txt
> 	Pages		: 32
> 	Date		: 2005-10-13
> 	
> This specification defines redirect reference resources.  A redirect
>    reference resource is a resource whose default response is an
>    HTTP/1.1 3xx (Redirection) status code (see RFC2616, Section 10.3),
>    redirecting the client to a different resource, the target resource.
>    A redirect reference makes it possible to access the target resource
>    indirectly, through any URI mapped to the redirect reference
>    resource.  There are no integrity guarantees associated with redirect
>    reference resources.
> 
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-webdav-redirectref-protocol-13.txt
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-- 
<green/>bytes GmbH -- http://www.greenbytes.de -- tel:+492512807760




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Elias Sinderson wrote:
> I actually see a need for more than two states: New, Assigned (accepted 
> by WG for discussion), Resolved (some resolution reached on the list, 
> editorial or otherwise), Closed (resolution is in current draft). Comments?

Whatever works for you.

Related: I'd like to propose that we use the mailing list to *discuss* 
issues; that will make things much more readable. Once the WG reaches 
consensus on an issue, the proposed resolution can be entered in 
BugZilla, and then the current author of rfc2518bis can update the spec.

Best regards, Julian




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=37

julian.reschke@greenbytes.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED





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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=168

           Summary: Revert to original reference style
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Other
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


RFC2518 used to use symbolic references (such as [RFC2026]) instead of numbered
references. Please revert back to this style; it makes the spec much easier to read.

(in RFC2629's DTD:

<?rfc symrefs="yes"?>
<?rfc sortrefs="yes"?>

)



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Proposed resolution for 
<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=37>:

Section 1., para. 11:
OLD:

    Finishing off the specification are sections on what it means for a
    resource to be compliant with this specification (Section 17), on
    internationalization support (Section 18), and on security
    (Section 19).

NEW:

    WebDAV employs the property mechanism to store information about the
    current state of the resource.  For example, when a lock is taken out
    on a resource, a lock information property describes the current
    state of the lock.  Section 14 defines the properties used within the
    WebDAV specification.

    Finishing off the specification are sections on what it means for a
    resource to be compliant with this specification (Section 17), on
    internationalization support (Section 18), and on security
    (Section 19).


Best regards, Julian

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--- draft-ietf-webdav-rfc2518bis-07.xml	2005-10-15 19:19:46.000000000 +0100
+++ rfc2518bis-08-bug37.xml	2005-10-15 19:22:34.000000000 +0100
@@ -146,6 +146,13 @@
    XML</xref> appearing in WebDAV so that it truly is extensible. 
   </t>
   <t>
+   WebDAV employs the property mechanism to store information about the
+   current state of the resource.  For example, when a lock is taken out
+   on a resource, a lock information property describes the current
+   state of the lock.  <xref target="dav-properties"/> defines the properties used within the
+   WebDAV specification.
+  </t>
+  <t>
    Finishing off the specification are sections on what it means for a resource to be 
    <xref target="compliance-classes">compliant with this specification</xref>, on 
    <xref target="i18n">internationalization support</xref>, and on 
@@ -4192,7 +4199,7 @@
   
 </section>
 
-<section title="DAV Properties">
+<section title="DAV Properties" anchor="dav-properties">
   <t>
    For DAV properties, the name of the property is also the same as the 
    name of the XML element that contains its value. In the section 

--------------070103070600050207020005--




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23

julian.reschke@greenbytes.de changed:

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Proposed resolution for 
<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23>:

Section 6., para. 14:
OLD:

    A lock token is a type of state token, represented as a URI, which
    identifies a particular lock.  A lock token is returned in the Lock-
    Token header in the response to a successful LOCK operation.  The
    lock token also appears in the value of the lockdiscovery property,
    the value of which is returned in the body of the response to a
    successful LOCK operation (this property also includes the tokens of
    other current locks on the resource).  Finally, the lockdiscovery
    property can be queried using PROPFIND and the token can be
    discovered that way.  Each lock has only one unique lock token.

NEW:

    A lock token is a type of state token, represented as a URI, which
    identifies a particular lock.  Each lock has exactly one unique lock
    token, which is returned upon a successful LOCK creation operation in
    the "Lock-Token" response header defined in Section 9.6.


Best regards, Julian


--------------040809000006080304020407
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--- draft-ietf-webdav-rfc2518bis-07.xml	2005-10-15 19:19:46.000000000 +0100
+++ rfc2518bis-08-bug23.xml	2005-10-15 19:48:16.000000000 +0100
@@ -616,17 +616,13 @@
   </section>
   
   <section title="Lock Tokens">
-    <t>
-   A lock token is a type of state token, represented as a URI, which 
-   identifies a particular lock.  A lock token is returned in the Lock-
-   Token header in the response to a successful LOCK operation. The 
-   lock token also appears in the value of the lockdiscovery property, 
-   the value of which is returned in the body of the response to a 
-   successful LOCK operation (this property also includes the tokens of 
-   other current locks on the resource).  Finally, the lockdiscovery 
-   property can be queried using PROPFIND and the token can be 
-   discovered that way. Each lock has only one unique lock token.  
-    </t>
+  <t>
+   A lock token is a type of state token, represented as a URI, which
+   identifies a particular lock.  Each lock has exactly one unique lock
+   token, which is returned upon a successful LOCK creation operation in
+   the "Lock-Token" response header defined in
+   <xref target="HEADER_Lock-Token"/>.
+  </t>
     <t>
    Lock token URIs MUST be unique across all resources for all time. 
    This uniqueness constraint allows lock tokens to be submitted across 
@@ -3337,7 +3333,7 @@
     </section>
   </section>
   
-  <section title="Lock-Token Header">
+  <section title="Lock-Token Header" anchor="HEADER_Lock-Token">
     <t>
    Lock-Token = "Lock-Token" ":" Coded-URL 
     </t>

--------------040809000006080304020407--




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=18

julian.reschke@greenbytes.de changed:

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From w3c-dist-auth-request@frink.w3.org Sat Oct 15 15:37:31 2005
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Proposed resolution for 
<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=18>:

History:

The "force-authenticate" request header was initially proposed by Ilya 
Kirnos, and we had a discussion about this back three years ago 
<http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/thread.html#291>). 
As far as I can tell, the consensus back then was not to define a new 
header, but to make use of an "If" request header that was known to 
alway evaluate to false instead.

In January 2003, the WG had an interim meeting hosted by Apple, during 
which the problem was discussed again. Unfortunately, there doesn't seem 
to be any public record of what was discussed on the second day (which 
AFAIR was the day we discussed this topic). (Minutes for day one in 
<http://lists.w3.org/Archives/Public/w3c-dist-auth/2003JanMar/0075.html>).

The "Force-Authentication" header was then introduced in draft 03 
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-03.txt>), 
but I can't find any record of a consensus reached on the mailing list.

I therefore propose to remove the header from the spec, encouraging 
those who feel that this feature is needed to solve a real-world problem 
to restart the discussion on the mailing list (containing a precise 
problem statement, and an analysis why the current spec isn't sufficient 
in this regard).

In addition to removing section 9.4, further changes would be:

Section 17., para. 11:
OLD:

    A resource can explicitly advertise its support for the revisions to
    RFC2518 made in this document.  In particular, this allows clients to
    use the Force-Authentication header on requests.  Class 1 must be
    supported as well.  Class 2 MAY be supported.

NEW:

    A resource can explicitly advertise its support for the revisions to
    RFC2518 made in this document.  Class 1 must be supported as well.
    Class 2 MAY be supported.


Section 17., para. 13:
OLD:

    o  the Force-Authentication header.

    o  Any behavior that it supports, in the manner specified in this
       document, rather than in the manner specified in RFC2518, for all
       client requests.  A server MAY use an older behavior for specific
       clients that are discovered to have interoperability problems with
       the requirements of this specification, but MUST NOT use an older
       behavior indiscriminately.

NEW:

    o  Any behavior that it supports, in the manner specified in this
       document, rather than in the manner specified in RFC2518, for all
       client requests.  A server MAY use an older behavior for specific
       clients that are discovered to have interoperability problems with
       the requirements of this specification, but MUST NOT use an older
       behavior indiscriminately.


Section 21., para. 8:
OLD:

    Valuable contributions to RFC2518 bis came from some already named.
    New contributors must also be gratefully acknowledged.  Julian
    Reschke, Geoff Clemm, Joel Soderberg, and Dan Brotsky hashed out
    specific text on the list or in meetings.  Ilya Kirnos supplied text
    for Force-Authentication header.  Joe Hildebrand contributed as co-
    chair.

NEW:

    Valuable contributions to RFC2518 bis came from some already named.
    New contributors must also be gratefully acknowledged.  Julian
    Reschke, Geoff Clemm, Joel Soderberg, and Dan Brotsky hashed out
    specific text on the list or in meetings.  Joe Hildebrand contributed
    as co-chair.


Best regards, Julian

--------------040800040805080805080604
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--- draft-ietf-webdav-rfc2518bis-07.xml	2005-10-15 19:19:46.000000000 +0100
+++ rfc2518bis-08-bug18.xml	2005-10-15 20:29:23.000000000 +0100
@@ -3112,23 +3112,7 @@
    to the remote server using PUT/PROPPATCH or another mechanism. 
     </t>
   </section>
-  
-  <section title="Force-Authentication Header">
-    <t>
-   Force-Authentication = "Force-Authentication" ":" Method 
-    </t>
-    <t>
-   The Force-Authentication request header is used with the OPTIONS method to 
-   specify that the client wants to be challenged for authentication 
-   credentials to the resource identified by the Request-URI.  If 
-   present on a request to a WebDAV-compliant resource, the server MUST 
-   respond with either 401 (Unauthorized) or 501 (Not Implemented) 
-   status code. The Method value is used for the client to indicate 
-   what method it intends to use first on the resource identified in 
-   the Request-URI.  
-    </t>
-  </section>
-  
+    
   <section title="If Header">
     <figure>
       <artwork>
@@ -4832,15 +4816,13 @@
   <section title="Class 'bis'">
     <t>
    A resource can explicitly advertise its support for the revisions to 
-   RFC2518 made in this document. In particular, this allows clients to 
-   use the Force-Authentication header on requests.  Class 1 must be 
+   RFC2518 made in this document.  Class 1 must be 
    supported as well. Class 2 MAY be supported.   
     </t>
     <t>
    A resource that supports bis MUST support: 
     </t>
     <t><list style="symbols">
-      <t>the Force-Authentication header.  </t>
       <t>Any behavior that it supports, in the manner specified in this 
    document, rather than in the manner specified in RFC2518, for all 
    client requests.  A server MAY use an older behavior for specific 
@@ -5200,8 +5182,7 @@
    Valuable contributions to RFC2518 bis came from some already named. 
    New contributors must also be gratefully acknowledged. Julian 
    Reschke, Geoff Clemm, Joel Soderberg, and Dan Brotsky hashed out 
-   specific text on the list or in meetings. Ilya Kirnos supplied text 
-   for Force-Authentication header.  Joe Hildebrand contributed as 
+   specific text on the list or in meetings.  Joe Hildebrand contributed as 
    co-chair.
   </t>
 </section>

--------------040800040805080805080604--




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From: Julian Reschke <julian.reschke@gmx.de>
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To: Julian Reschke <julian.reschke@gmx.de>
CC: Lisa Dusseault <lisa@osafoundation.org>,
        Cullen Jennings <fluffy@cisco.com>,
        Geoffrey M Clemm <geoffrey.clemm@us.ibm.com>,
        WebDav <w3c-dist-auth@w3.org>, w3c-dist-auth-request@w3.org
References: <OFA16D6C25.FEE47A7E-ON85257092.00012936-85257092.0001F502@us.ibm.com> <91df83c7d462717c7fa70fe05411113b@osafoundation.org> <434D0DC0.2030800@gmx.de> <7fc3943a09cf9d3077ccf22c5a0f0f62@osafoundation.org> <434EB057.3020504@gmx.de> <3e3690da7043c971ea5594190ac125d7@osafoundation.org> <434EB722.10609@gmx.de> <643638228b4f0af8dd27bcdcb5c4a6d6@osafoundation.org> <434EC393.4060604@gmx.de>
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This is a multi-part message in MIME format.
--------------090705070601000102080105
Content-Type: text/plain; charset=Big5
Content-Transfer-Encoding: 7bit

OK,

in the meantime I have tested round-tripping of property values (using
the attached script). Results for those servers I can currently test with:

SAP Netweaver: preserves whitespace and namespace prefixes

Apache/moddav 2.0.54: preserves whitespace, but not namespace prefixes.

Xythos (whatever release currently running on www.sharemation.com):
preserves whitespace, but not namespace prefixes. Note that is also
looses attributes in the property value (!).

IIS - will need to test: AFAIR, no mixed content supported at all.

So yes, those servers that do support mixed content also preserve
whitespace.

Assuming that IIS is broken anyway (and is not going to be fixed anytime
soon), we could potentially concentrate on Xythos and Apache/mod_dav.
Xythos will need a fix for attribute rounbd-tripping anyway. Regarding
mod_dav, maybe a fix for the missing prefix round-tripping is simple
(anybody listening? Joe?).


Best regards, Julian





--------------090705070601000102080105
Content-Type: application/x-javascript;
 name="property_round_trip.js"
Content-Disposition: inline;
 filename="property_round_trip.js"
Content-Transfer-Encoding: 7bit

var req = new ActiveXObject ("MSXML2.ServerXMLHTTP");

if (WScript.Arguments.length == 0) {
  WScript.Echo("Test case property roundtrip");
  WScript.Echo("Usage: cscript property_roundtrip.js URI {username} {password}");
  WScript.Quit(2);
}

var uri = WScript.Arguments(0);
var user = null;
var pwd = null;

function dumpResponse(r) {
  WScript.Echo(r.status);
  WScript.Echo(r.getAllResponseHeaders());
  WScript.Echo(r.responseText);
}


if (WScript.Arguments.length > 1) {
  user = WScript.Arguments(1);
}

if (WScript.Arguments.length > 2) {
  pwd = WScript.Arguments(2);
}


// delete content
WScript.Echo("DELETE " + uri);
req.open("DELETE", uri, false, user, pwd);
req.send("foobar");
dumpResponse(req);

// put content
WScript.Echo("PUT " + uri);
req.open("PUT", uri, false, user, pwd);
req.send("foobar");
dumpResponse(req);
if (req.status < 200 || req.status >= 300) {
  WScript.Echo("unexpected status upon PUT");
  WScript.Quit(2);
}

// simple proppatch 
WScript.Echo("PROPPATCH " + uri);
req.open("PROPPATCH", uri, false, user, pwd);
req.send("<propertyupdate xmlns='DAV:'><set><prop>"
 + "<test/>"
 + "</prop></set></propertyupdate>");
dumpResponse(req);
if (req.status != 207) {
  WScript.Echo("unexpected status upon PROPPATCH");
  WScript.Quit(2);
}

// complex proppatch
WScript.Echo("PROPPATCH " + uri);
req.open("PROPPATCH", uri, false, user, pwd);
req.send("<propertyupdate xmlns='DAV:'><set><prop>"
 + "<test xmlns='http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=10' xmlns:foobar='foo:'>"
 + " leading blank <foobar:mixed-content example='foobar:xyz'/>" 
 + "</test>"
 + "</prop></set></propertyupdate>");
dumpResponse(req);
if (req.status != 207) {
  WScript.Echo("unexpected status upon PROPPATCH");
  WScript.Quit(2);
}

// propfind
WScript.Echo("PROPFIND " + uri);
req.open("PROPFIND", uri, false, user, pwd);
req.send("<propfind xmlns='DAV:'><prop>"
 + "<test xmlns='http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=10'/>"
 + "</prop></propfind>");
dumpResponse(req);
if (req.status != 207) {
  WScript.Echo("unexpected status upon PROPFIND");
  WScript.Quit(2);
}

--------------090705070601000102080105--




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=9





------- Additional Comments From lisa@osafoundation.org  2005-10-15 14:58 -------
Text for the -08 version of the draft:

Note that "DAV:" uses a scheme name defined solely for
the purpose of creating this namespace.  Using a scheme name alone does 
not create a compliant URI according to <xref target="RFC2396">RFC2396</xref>. 
Furthermore, defining new schemes for namespaces is discouraged.
"DAV:" was defined before standard best practices emerged, and this 
namespace is still used only because of significant existing deployments. 



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=17

lisa@osafoundation.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED



------- Additional Comments From lisa@osafoundation.org  2005-10-15 16:20 -------
Done for -08.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=19

lisa@osafoundation.org changed:

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----------------------------------------------------------------------------
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------- Additional Comments From lisa@osafoundation.org  2005-10-15 16:27 -------
Fixed for draft version -08.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=20

lisa@osafoundation.org changed:

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------- Additional Comments From lisa@osafoundation.org  2005-10-15 16:34 -------
I think I've got all the strays now, in the text for -08.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=24





------- Additional Comments From lisa@osafoundation.org  2005-10-15 16:37 -------
Proposed text for -08:

      When trying to lock a collection upon 
      creation, clients may attempt to increase the likelihood of this by 
      pipelining the MKCOL and LOCK requests together (but because this 
      doesn't convert two separate operations into one atomic operation 
      there's no guarantee this will work).   




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On Sat, Oct 15, 2005 at 10:05:14PM +0200, Julian Reschke wrote:
> Assuming that IIS is broken anyway (and is not going to be fixed anytime
> soon), we could potentially concentrate on Xythos and Apache/mod_dav.
> Xythos will need a fix for attribute rounbd-tripping anyway. Regarding
> mod_dav, maybe a fix for the missing prefix round-tripping is simple
> (anybody listening? Joe?).

I don't think it would be particularly simple, no; the assumption that 
the prefix names don't need to be preserved is quite deep-rooted in 
mod_dav's property handling.

joe





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Hi Lisa,

could you please make sure that the file on ietf.webdav.org is indeed 
well-formed XML? It currently contains several non-ASCII characters that 
cause XML parsers to choke on it (a fixed version is at 
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-latest.xml>).

Best regards, Julian





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Julian Reschke wrote:
> 
> Hi Lisa,
> 
> could you please make sure that the file on ietf.webdav.org is indeed 
> well-formed XML? It currently contains several non-ASCII characters that 
> cause XML parsers to choke on it (a fixed version is at 
> <http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-latest.xml>). 

I also just noted that conversion in "strict" mode (as currently 
configured) fails because artwork is too wide. Please either remove the 
PI for now, or fix the artwork xml2rfc is complaining about.

Best regards, Julian




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bugzilla@soe.ucsc.edu wrote:
> http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=9
> 
> 
> 
> 
> 
> ------- Additional Comments From lisa@osafoundation.org  2005-10-15 14:58 -------
> Text for the -08 version of the draft:
> 
> Note that "DAV:" uses a scheme name defined solely for
> the purpose of creating this namespace.  Using a scheme name alone does 
> not create a compliant URI according to <xref target="RFC2396">RFC2396</xref>. 
> Furthermore, defining new schemes for namespaces is discouraged.
> "DAV:" was defined before standard best practices emerged, and this 
> namespace is still used only because of significant existing deployments. 
 > ...

Well,

in the meantime RFC2396 has been obsoleted, and RFC3986 makes "DAV:" a 
legal URI 
(<http://greenbytes.de/tech/webdav/rfc3986.html#rfc.section.D.2.p.4>). 
Thus I'd simply this to:

--
Note that "DAV:" is an URI scheme name defined solely for
the purpose of creating this namespace.  However, defining a new URI 
scheme just for the purpose of identifying protocol elements is to be 
considered a bad practice, and should not be copied.  It is still used 
in this protocol revision because of significant existing deployments.
--

Best regards, Julian




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Hi,

I note that this paragraph has made it into the current draft at 
<http://ietf.webdav.org/webdav/rfc2518bis/draft-ietf-webdav-rfc2518bis.xml>. 
Could you please remove it unless we reach a working group consensus to 
add it?

Thanks,

Julian


Julian Reschke wrote:
> 
> Lisa Dusseault wrote:
> 
>>
>> This thread from a couple months ago brought up something probably 
>> worth clarifying in RFC2518bis.  In fact we could usefully constrain 
>> servers generally in what status codes MAY or MUST NOT be used inside 
>> Multi-Status.  I wrote up a strawman draft section for this so we 
>> could discuss the specifics:
>>
>>    The following status codes MUST NOT be used in Multi-Status
>>    responses: 100 Continue, 101 Switching Protocols, 205 Reset Content,
>>    206 Partial Content, 300 Multiple Choices?, 305 Use Proxy, 400 Bad
>>    Request, 405 Method Not Allowed, 406 Not Acceptable, 407 Proxy
>>    Authentication Required, 411 Length Required, 412 Precondition
>>    Failed, 413 Request Entity Too Large, 414 Request-URI Too Long, 415
>>    Unsupported Media Type, 416 Requested Range Not Satisfiable, 417
>>    Expectation Failed, 501 Not Implemented and 505 HTTP Version Not
>>    Supported.
>>
>>    The following status codes MAY be used in Multi-Status responses: 200
>>    OK, 201 Created, 301 Moved Permanently, 302 Found, 303 See Other, 307
>>    Temporary Redirect, 401 Unauthorized, 403 Forbidden, 404 Not Found
>>    and 410 Gone.
>>
>>    The following status codes MAY be used in Multi-Status responses,
>>    although the meaning might be unclear based only on this
>>    specification.  Thus, specifications extending WebDAV MAY make use of
>>    these status codes in Multi-Status responses but regular WebDAV
>>    clients would reasonably be expected to be confused by these: 202
>>    Accepted, 203 Non-Authoritative Information, 204 No Content, 304 Not
>>    Modified, 402 Payment Required, 409 Conflict, 408 Request Timeout,
>>    500 Internal Server Error, 502 Bad Gateway, 503 Service Unavailable
>>    and 504 Gateway Timeout.
>>
>> Comments?
> 
> 
> Yes.
> 
> 1) What exactly is the issue this is supposed to solve?
> 
> 2) How did you come up with these lists? How do they help a client that 
> needs to handle unknown status codes anyway (based on the first digit)? 
> For instance, why can 300 not appear in a multistatus?
> 
> Best regards, Julian
> 
> 


-- 
<green/>bytes GmbH -- http://www.greenbytes.de -- tel:+492512807760




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According to Oxygen's well-formedness test, the version I synchronized  
to  
http://ietf.webdav.org/webdav/rfc2518bis/draft-ietf-webdav- 
rfc2518bis.xml (and the version I pulled back down again) is  
well-formed.  It also goes through the utility at xml.resource.org just  
fine.

I tried to diff the xml file downloaded from my URL vs. the one from  
yours and unfortunately the diff is garbage, showing every line  
different.  It's probably something stupid like line returns, but it's  
a pain in the ass figuring out what's actually changed.   If you  
provide a diff I'll check it out further.

Lisa


On Oct 16, 2005, at 3:17 AM, Julian Reschke wrote:

>
> Hi Lisa,
>
> could you please make sure that the file on ietf.webdav.org is indeed  
> well-formed XML? It currently contains several non-ASCII characters  
> that cause XML parsers to choke on it (a fixed version is at  
> <http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis- 
> latest.xml>).
>
> Best regards, Julian
>
>





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bugzilla@soe.ucsc.edu wrote:
> http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=17
> 
> lisa@osafoundation.org changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>              Status|NEW                         |ASSIGNED
> 
> 
> 
> ------- Additional Comments From lisa@osafoundation.org  2005-10-15 16:20 -------
> Done for -08.
> ...

For the record, the change is:

Section 8., para. 61:
OLD:

     This example also demonstrates the use of XML namespace scoping and
     the default namespace.  Since the "xmlns" attribute does not contain
     a prefix, the namespace applies by default to all enclosed elements.
     Hence, all elements which do not explicitly state the namespace to
     which they belong are members of the "DAV:" namespace schema.

NEW:

     This example also demonstrates the use of XML namespace scoping and
     the default namespace.  Since the "xmlns" attribute does not contain
     a prefix, the namespace applies by default to all enclosed elements.
     Hence, all elements which do not explicitly state the namespace to
     which they belong are members of the "DAV:" namespace.


...and I'm happy with this resolution.

Best regards, Julian




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Good catch!  I'll update to 3986.

lisa

On Oct 16, 2005, at 8:33 AM, Julian Reschke wrote:

>
> bugzilla@soe.ucsc.edu wrote:
>> http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=9
>> ------- Additional Comments From lisa@osafoundation.org  2005-10-15 
>> 14:58 -------
>> Text for the -08 version of the draft:
>> Note that "DAV:" uses a scheme name defined solely for
>> the purpose of creating this namespace.  Using a scheme name alone 
>> does not create a compliant URI according to <xref 
>> target="RFC2396">RFC2396</xref>. Furthermore, defining new schemes 
>> for namespaces is discouraged.
>> "DAV:" was defined before standard best practices emerged, and this 
>> namespace is still used only because of significant existing 
>> deployments.
> > ...
>
> Well,
>
> in the meantime RFC2396 has been obsoleted, and RFC3986 makes "DAV:" a 
> legal URI 
> (<http://greenbytes.de/tech/webdav/rfc3986.html#rfc.section.D.2.p.4>). 
> Thus I'd simply this to:
>
> --
> Note that "DAV:" is an URI scheme name defined solely for
> the purpose of creating this namespace.  However, defining a new URI 
> scheme just for the purpose of identifying protocol elements is to be 
> considered a bad practice, and should not be copied.  It is still used 
> in this protocol revision because of significant existing deployments.
> --
>
> Best regards, Julian
>





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bugzilla@soe.ucsc.edu wrote:
> http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=19
> 
> lisa@osafoundation.org changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>              Status|NEW                         |ASSIGNED
> 
> 
> 
> ------- Additional Comments From lisa@osafoundation.org  2005-10-15 16:27 -------
> Fixed for draft version -08.
> ...

The change I see is:

Section 9., para. 30:
OLD:

    The If request header is intended to have similar functionality to
    the If-Match header defined in section 14.24 of RFC2616 [7].  However
    the If header is intended for use with any URI which represents state
    information, referred to as a state token, about a resource as well
    as ETags.  A typical example of a state token is a lock token, and
    lock tokens are the only state tokens defined in this specification.
    The <DAV:no-lock> state token is a special token that must never
    match an actual valid lock token.  The purpose of this is described
    in section 9.5.5.

NEW:

    The If request header is intended to have similar functionality to
    the If-Match header defined in section 14.24 of RFC2616 [7].  However
    the If header is intended for use with any URI which represents state
    information, referred to as a state token, about a resource as well
    as ETags.  A typical example of a state token is a lock token, and
    lock tokens are the only state tokens defined in this specification.
    The <DAV:no-lock> state token is an example of a state token that
    must never match an actual valid lock token.  The purpose of this is
    described in Section 9.5.3.


I'd say "will never match" instead if "must never match", because that's 
by definition, not because we tell server implementors to behave that way.

Best regards, Julian




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bugzilla@soe.ucsc.edu wrote:
> http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=20
> 
> lisa@osafoundation.org changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>              Status|NEW                         |ASSIGNED
> 
> 
> 
> ------- Additional Comments From lisa@osafoundation.org  2005-10-15 16:34 -------
> I think I've got all the strays now, in the text for -08.
 > ...

This doesn't look like an improvement -- the spec now uses syntactically 
invalid tokens in the "opaquelocktoken" scheme.

Could you please make sure that the spec always uses registered URI 
schemes, and when doing so, uses URIs that are actually syntactically legal?


Best regards, Julian




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Lisa Dusseault wrote:
> 
> According to Oxygen's well-formedness test, the version I synchronized  
> to  http://ietf.webdav.org/webdav/rfc2518bis/draft-ietf-webdav- 
> rfc2518bis.xml (and the version I pulled back down again) is  
> well-formed.  It also goes through the utility at xml.resource.org just  
> fine.

xml2rfc doesn't use a proper XML parser. I don't know about the other 
one you tried, but the document contains non-ASCII characters which 
aren't UTF-8 encoded, thus proper XML parsers reject the document 
because of encoding problems.

> I tried to diff the xml file downloaded from my URL vs. the one from  
> yours and unfortunately the diff is garbage, showing every line  
> different.  It's probably something stupid like line returns, but it's  
> a pain in the ass figuring out what's actually changed.   If you  
> provide a diff I'll check it out further.

Just check for non-ASCII characters.

Best regards, Julian




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Hi,

I was looking at the current edits and couldn't help noticing that it 
again contains stuff that wasn't announced at all. As far as I can tell, 
drafts submitted to the IETF should optimally represent the working 
group's consensus, and putting in stuff silently into the working edits 
doesn't seem to be the best way to achieve this.

In particular:

1) "Hosting malicious scripts executed on client machines" 
(http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-latest.html#rfc.section.19.8>) 
looks interesting; but I don't see an issue raised for this topic. In 
particular, the recommendation to strip script from HTML pages looks a 
fishy (upon GET? PUT? for all users?). This certainly needs more 
discussion if this should be added to the spec.

2) Summary of changes from RFC2518 
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-latest.html#rfc.section.B.3.1>):

> B.3.1  Summary of changes from RFC2518
> 
>    This section describes changes that are likely to result in
>    implementation changes due to tightened requirements or changed
>    behavior.  A more complete list of changes has been published in a
>    separate document.

Really? I think readers of the spec really would prefer to have a 
complete (not only a "more complete") list right here.

> B.3.1.1  Changes Notable to Server Implementors
> 
>    Tightened requirements for storing property  values (Section 4.4)
>    when "xml:lang" appears and also when values are XML fragments
>    (specifically on preserving prefixes, namespaces and whitespace.)
> 
>    Several tightened requirements for general response  handling
>    (Section 8.1), including response bodies for use with errors, use of
>    Date header, ETag and Location header.

- The response bodies for errors are optional, right?
- What did change regarding the other response headers?

>    Tightened requirements for URL construction in PROPFIND (Section 8.2)
>    responses.
> 
>    Tightened requirements for checking identity of lock  owners
>    (Section 7.1) during operations affected by locks.
> 
>    Tightened requirements for copying properties (Section 8.9.2) and
>    moving properties (Section 8.10.1).

(to be discussed)

>    Tightened requirements on preserving owner field in locks
>    (Section 8.11).  Added "lockroot" element to lockdiscovery
>    information.
> 
>    New value for "DAV:" header (Section 9.1) to advertise support for
>    this specification.
> 
>    Tightened requirement for "Destination:"  header (Section 9.3) to
>    work with path values
> 
>    New "Force-Authentication:" (Section 9.4) header added.
> 
>    Several changes for "If:" header (Section 9.5), including requirement
>    to accept commas and "DAV:no-lock" state token.

"DAV:no-lock" is no new requirement.

>    Support for UTF-16 now required (ref (Section 18)).

I don't think the requirement changed. The spec merely wasn't properly 
repeating what XML defines, and this was fixed.

>    Removed definition of "source" property and special handling for
>    dynamic resources
> 
>    Replaced lock-null resources with simpler locked empty resources
>    (Section 7.6)
> 
> B.3.1.2  Changes Notable to Client Implementors
> 
>    Tightened requirements for supporting WebDAV collections
>    (Section 5.2) within resources that do not support WebDAV (e.g.
>    servlet containers).
> 
>    Redefined 'allprop' PROPFIND requests so that the server does not
>    have to return all properties.

That affects servers as well, right? Maybe splitting the list in two 
parts isn't worthwhile.

>    Required to handle empty multistatus responses in PROPFIND  responses
>    (Section 8.2)
> 
>    No more "propertybehavior" specification allowed in MOVE and COPY
>    requests
> 
>    Support for UTF-16 now required (ref (Section 18)).
> 
>    Removed definition of "source" property and special handling for
>    dynamic resources.

Missing changes:

- PROPFIND dead-props 
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-latest.html#rfc.section.13.28>)

- implicit lock refresh removed (see 
<http://greenbytes.de/tech/webdav/draft-reschke-webdav-locking-latest.html#rfc.section.B.1.1>)

...and potentially more.

Best regards, Julian





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Julian Reschke wrote:

>> I tried to diff the xml file downloaded from my URL vs. the one from =20
>> yours and unfortunately the diff is garbage, showing every line =20
>> different.  It's probably something stupid like line returns, but=20
>> it's  a pain in the ass figuring out what's actually changed.   If=20
>> you  provide a diff I'll check it out further.
>=20
>=20
> Just check for non-ASCII characters.

For instance:

 > xsltproc rfc2629.xslt draft-ietf-webdav-rfc2518bis-latest.xml
draft-ietf-webdav-rfc2518bis-latest.xml:1014: error: Input is not proper=20
UTF-8, indicate encoding !
    because it is acting with principal A=A1s credential, is allowed to
                                         ^
draft-ietf-webdav-rfc2518bis-latest.xml:1014: error: Bytes: 0xA1 0x73=20
0x20 0x63
    because it is acting with principal A=A1s credential, is allowed to
                                         ^
unable to parse draft-ietf-webdav-rfc2518bis-latest.xml





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The text on hosting malicious scripts was suggested by Barry Lind.

I put in the summary of changes in response to your suggestion on the  
phone, Julian.

Cullen, could you please respond about putting proposed text in the  
working copy of the draft either posted at ietf.webdav.org/webdav  or  
submitted to Internet-Drafts archive.

Lisa

On Oct 16, 2005, at 9:10 AM, Julian Reschke wrote:

>
> Hi,
>
> I was looking at the current edits and couldn't help noticing that it  
> again contains stuff that wasn't announced at all. As far as I can  
> tell, drafts submitted to the IETF should optimally represent the  
> working group's consensus, and putting in stuff silently into the  
> working edits doesn't seem to be the best way to achieve this.
>
> In particular:
>
> 1) "Hosting malicious scripts executed on client machines"  
> (http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis- 
> latest.html#rfc.section.19.8>) looks interesting; but I don't see an  
> issue raised for this topic. In particular, the recommendation to  
> strip script from HTML pages looks a fishy (upon GET? PUT? for all  
> users?). This certainly needs more discussion if this should be added  
> to the spec.
>
> 2) Summary of changes from RFC2518  
> (<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis- 
> latest.html#rfc.section.B.3.1>):
>
>> B.3.1  Summary of changes from RFC2518
>>    This section describes changes that are likely to result in
>>    implementation changes due to tightened requirements or changed
>>    behavior.  A more complete list of changes has been published in a
>>    separate document.
>
> Really? I think readers of the spec really would prefer to have a  
> complete (not only a "more complete") list right here.
>
>> B.3.1.1  Changes Notable to Server Implementors
>>    Tightened requirements for storing property  values (Section 4.4)
>>    when "xml:lang" appears and also when values are XML fragments
>>    (specifically on preserving prefixes, namespaces and whitespace.)
>>    Several tightened requirements for general response  handling
>>    (Section 8.1), including response bodies for use with errors, use  
>> of
>>    Date header, ETag and Location header.
>
> - The response bodies for errors are optional, right?
> - What did change regarding the other response headers?
>
>>    Tightened requirements for URL construction in PROPFIND (Section  
>> 8.2)
>>    responses.
>>    Tightened requirements for checking identity of lock  owners
>>    (Section 7.1) during operations affected by locks.
>>    Tightened requirements for copying properties (Section 8.9.2) and
>>    moving properties (Section 8.10.1).
>
> (to be discussed)
>
>>    Tightened requirements on preserving owner field in locks
>>    (Section 8.11).  Added "lockroot" element to lockdiscovery
>>    information.
>>    New value for "DAV:" header (Section 9.1) to advertise support for
>>    this specification.
>>    Tightened requirement for "Destination:"  header (Section 9.3) to
>>    work with path values
>>    New "Force-Authentication:" (Section 9.4) header added.
>>    Several changes for "If:" header (Section 9.5), including  
>> requirement
>>    to accept commas and "DAV:no-lock" state token.
>
> "DAV:no-lock" is no new requirement.
>
>>    Support for UTF-16 now required (ref (Section 18)).
>
> I don't think the requirement changed. The spec merely wasn't properly  
> repeating what XML defines, and this was fixed.
>
>>    Removed definition of "source" property and special handling for
>>    dynamic resources
>>    Replaced lock-null resources with simpler locked empty resources
>>    (Section 7.6)
>> B.3.1.2  Changes Notable to Client Implementors
>>    Tightened requirements for supporting WebDAV collections
>>    (Section 5.2) within resources that do not support WebDAV (e.g.
>>    servlet containers).
>>    Redefined 'allprop' PROPFIND requests so that the server does not
>>    have to return all properties.
>
> That affects servers as well, right? Maybe splitting the list in two  
> parts isn't worthwhile.
>
>>    Required to handle empty multistatus responses in PROPFIND   
>> responses
>>    (Section 8.2)
>>    No more "propertybehavior" specification allowed in MOVE and COPY
>>    requests
>>    Support for UTF-16 now required (ref (Section 18)).
>>    Removed definition of "source" property and special handling for
>>    dynamic resources.
>
> Missing changes:
>
> - PROPFIND dead-props  
> (<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis- 
> latest.html#rfc.section.13.28>)
>
> - implicit lock refresh removed (see  
> <http://greenbytes.de/tech/webdav/draft-reschke-webdav-locking- 
> latest.html#rfc.section.B.1.1>)
>
> ...and potentially more.
>
> Best regards, Julian
>
>





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Clarifying...

I'd like to see stuff put into the draft *after* it has been discussed 
on the list, or at least that changes that are made are announced to the 
list for review. In the past, people have burned lots of cycles trying 
to find out what changed without notice, and reporting issues with these 
changes. It would really be nice if we could avoid that in the future.

Best regards, Julian



Lisa Dusseault wrote:
> 
> 
> The text on hosting malicious scripts was suggested by Barry Lind.
> 
> I put in the summary of changes in response to your suggestion on the  
> phone, Julian.
> 
> Cullen, could you please respond about putting proposed text in the  
> working copy of the draft either posted at ietf.webdav.org/webdav  or  
> submitted to Internet-Drafts archive.
> 
> Lisa
> 
> On Oct 16, 2005, at 9:10 AM, Julian Reschke wrote:
> 
>>
>> Hi,
>>
>> I was looking at the current edits and couldn't help noticing that it  
>> again contains stuff that wasn't announced at all. As far as I can  
>> tell, drafts submitted to the IETF should optimally represent the  
>> working group's consensus, and putting in stuff silently into the  
>> working edits doesn't seem to be the best way to achieve this.
>>
>> In particular:
>>
>> 1) "Hosting malicious scripts executed on client machines"  
>> (http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis- 
>> latest.html#rfc.section.19.8>) looks interesting; but I don't see an  
>> issue raised for this topic. In particular, the recommendation to  
>> strip script from HTML pages looks a fishy (upon GET? PUT? for all  
>> users?). This certainly needs more discussion if this should be added  
>> to the spec.
>>
>> 2) Summary of changes from RFC2518  
>> (<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis- 
>> latest.html#rfc.section.B.3.1>):
>>
>>> B.3.1  Summary of changes from RFC2518
>>>    This section describes changes that are likely to result in
>>>    implementation changes due to tightened requirements or changed
>>>    behavior.  A more complete list of changes has been published in a
>>>    separate document.
>>
>>
>> Really? I think readers of the spec really would prefer to have a  
>> complete (not only a "more complete") list right here.
>>
>>> B.3.1.1  Changes Notable to Server Implementors
>>>    Tightened requirements for storing property  values (Section 4.4)
>>>    when "xml:lang" appears and also when values are XML fragments
>>>    (specifically on preserving prefixes, namespaces and whitespace.)
>>>    Several tightened requirements for general response  handling
>>>    (Section 8.1), including response bodies for use with errors, use  of
>>>    Date header, ETag and Location header.
>>
>>
>> - The response bodies for errors are optional, right?
>> - What did change regarding the other response headers?
>>
>>>    Tightened requirements for URL construction in PROPFIND (Section  
>>> 8.2)
>>>    responses.
>>>    Tightened requirements for checking identity of lock  owners
>>>    (Section 7.1) during operations affected by locks.
>>>    Tightened requirements for copying properties (Section 8.9.2) and
>>>    moving properties (Section 8.10.1).
>>
>>
>> (to be discussed)
>>
>>>    Tightened requirements on preserving owner field in locks
>>>    (Section 8.11).  Added "lockroot" element to lockdiscovery
>>>    information.
>>>    New value for "DAV:" header (Section 9.1) to advertise support for
>>>    this specification.
>>>    Tightened requirement for "Destination:"  header (Section 9.3) to
>>>    work with path values
>>>    New "Force-Authentication:" (Section 9.4) header added.
>>>    Several changes for "If:" header (Section 9.5), including  
>>> requirement
>>>    to accept commas and "DAV:no-lock" state token.
>>
>>
>> "DAV:no-lock" is no new requirement.
>>
>>>    Support for UTF-16 now required (ref (Section 18)).
>>
>>
>> I don't think the requirement changed. The spec merely wasn't 
>> properly  repeating what XML defines, and this was fixed.
>>
>>>    Removed definition of "source" property and special handling for
>>>    dynamic resources
>>>    Replaced lock-null resources with simpler locked empty resources
>>>    (Section 7.6)
>>> B.3.1.2  Changes Notable to Client Implementors
>>>    Tightened requirements for supporting WebDAV collections
>>>    (Section 5.2) within resources that do not support WebDAV (e.g.
>>>    servlet containers).
>>>    Redefined 'allprop' PROPFIND requests so that the server does not
>>>    have to return all properties.
>>
>>
>> That affects servers as well, right? Maybe splitting the list in two  
>> parts isn't worthwhile.
>>
>>>    Required to handle empty multistatus responses in PROPFIND   
>>> responses
>>>    (Section 8.2)
>>>    No more "propertybehavior" specification allowed in MOVE and COPY
>>>    requests
>>>    Support for UTF-16 now required (ref (Section 18)).
>>>    Removed definition of "source" property and special handling for
>>>    dynamic resources.
>>
>>
>> Missing changes:
>>
>> - PROPFIND dead-props  
>> (<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis- 
>> latest.html#rfc.section.13.28>)
>>
>> - implicit lock refresh removed (see  
>> <http://greenbytes.de/tech/webdav/draft-reschke-webdav-locking- 
>> latest.html#rfc.section.B.1.1>)
>>
>> ...and potentially more.
>>
>> Best regards, Julian
>>
>>
> 
> 
> 


-- 
<green/>bytes GmbH -- http://www.greenbytes.de -- tel:+492512807760




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Lisa,

Based on my reading of the book "Effective XML"
(http://www.cafeconleche.org/books/effectivexml/)

Item 10: White space matters

  WebDAV servers should preserve the white spaces
  when the attribute "xml:space" is set to "preserve".
  Else, if "xml:space" is not set or set to "default"
  "the application may treat white spaces in the
  element in whatever fashion is customary for that
  application".

Item 21: Rely on namespace URIs, not prefixes

  A WebDAV server should be allowed to change any
  namespace prefix.  "It's the URI that counts,
  not the prefix".

BTW, I highly recommend reading "Effective XML" to
anyone that works with XML.

Cheers,
Bernard

Lisa Dusseault wrote:
> I guess what's giving me so much cognitive dissonance here is that=20
> prefixes now are not preserved but whitespace is. That seems=20
> inconsistent to me -- if some XML rewriting is OK but other XML isn't,=20
> what's the difference.
>=20
> Lisa
>=20
> On Oct 13, 2005, at 12:36 PM, Julian Reschke wrote:
>=20
>     Lisa Dusseault wrote:
>=20
>         On Oct 13, 2005, at 12:07 PM, Julian Reschke wrote:
>=20
>             Actually what I'm asking for is that we don't change the
>             text unless there clearly is a consensus to do so. The
>             current spec says whitespace is significant, and as far as =
I
>             can tell, nobody has asked for a change of that.
>=20
>         Fair enough, although now I'm thinking we should be specific
>         about XML values, and about the beginning/end of the value as
>         well as the middle. I was thinking that the existing text in
>         2518 applied only to text property values.
>=20
>=20
>      From <http://www.webdav.org/wg/rfcdev/issues.htm>:
>=20
>     --=20
>     107
>=20
>=20
>     IS_XMLSPACE_SIGNIFICANT
>=20
>=20
>     Edit
>=20
>=20
>     InBis
>=20
>=20
>     Should the xml:space attribute be respected.=A1Z 2518bis on 6/1/02 =
says
>     it should not. There is some debate on this.
>=20
>=20
>     Re-raised:
>     http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0137.h=
tml
>=20
>=20
>     The conclusion of the May/June 2002 discussion was that white space
>     is significant:
>     http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0152.h=
tml
>     --=20
>=20
>     So the old issues list says this was discussed, that there was
>     consensus, and that rfc2518bis has been changed accordingly.
>=20
>     If you want to re-open the issue, please do so (but in a different
>     thread). If you do, please make sure to clarify what was wrong the
>     resolution we reached back then.
>=20
>         I'm still very curious to hear what implementations do/assume;
>         that's good input to see if the consensus is consistent with th=
e
>         spec.
>=20
>=20
>     Do you have any data about servers that get that wrong? That would
>     be interesting indeed.
>=20
>     Best regards, Julian
>=20
>=20







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Do you really think this should be removed from the final RFC? On the call
the other day I though you were going to do some testing and come up with
some modifications for this text?


On 10/16/05 8:35 AM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> 
> Hi,
> 
> I note that this paragraph has made it into the current draft at
> <http://ietf.webdav.org/webdav/rfc2518bis/draft-ietf-webdav-rfc2518bis.xml>.
> Could you please remove it unless we reach a working group consensus to
> add it?
> 
> Thanks,
> 
> Julian
> 
> 
> Julian Reschke wrote:
>> 
>> Lisa Dusseault wrote:
>> 
>>> 
>>> This thread from a couple months ago brought up something probably
>>> worth clarifying in RFC2518bis.  In fact we could usefully constrain
>>> servers generally in what status codes MAY or MUST NOT be used inside
>>> Multi-Status.  I wrote up a strawman draft section for this so we
>>> could discuss the specifics:
>>> 
>>>    The following status codes MUST NOT be used in Multi-Status
>>>    responses: 100 Continue, 101 Switching Protocols, 205 Reset Content,
>>>    206 Partial Content, 300 Multiple Choices?, 305 Use Proxy, 400 Bad
>>>    Request, 405 Method Not Allowed, 406 Not Acceptable, 407 Proxy
>>>    Authentication Required, 411 Length Required, 412 Precondition
>>>    Failed, 413 Request Entity Too Large, 414 Request-URI Too Long, 415
>>>    Unsupported Media Type, 416 Requested Range Not Satisfiable, 417
>>>    Expectation Failed, 501 Not Implemented and 505 HTTP Version Not
>>>    Supported.
>>> 
>>>    The following status codes MAY be used in Multi-Status responses: 200
>>>    OK, 201 Created, 301 Moved Permanently, 302 Found, 303 See Other, 307
>>>    Temporary Redirect, 401 Unauthorized, 403 Forbidden, 404 Not Found
>>>    and 410 Gone.
>>> 
>>>    The following status codes MAY be used in Multi-Status responses,
>>>    although the meaning might be unclear based only on this
>>>    specification.  Thus, specifications extending WebDAV MAY make use of
>>>    these status codes in Multi-Status responses but regular WebDAV
>>>    clients would reasonably be expected to be confused by these: 202
>>>    Accepted, 203 Non-Authoritative Information, 204 No Content, 304 Not
>>>    Modified, 402 Payment Required, 409 Conflict, 408 Request Timeout,
>>>    500 Internal Server Error, 502 Bad Gateway, 503 Service Unavailable
>>>    and 504 Gateway Timeout.
>>> 
>>> Comments?
>> 
>> 
>> Yes.
>> 
>> 1) What exactly is the issue this is supposed to solve?
>> 
>> 2) How did you come up with these lists? How do they help a client that
>> needs to handle unknown status codes anyway (based on the first digit)?
>> For instance, why can 300 not appear in a multistatus?
>> 
>> Best regards, Julian
>> 
>> 
> 




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Do I have the summary right that there is only one server we know of that
preservers namespaces?
 

On 10/15/05 1:05 PM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> OK,
> 
> in the meantime I have tested round-tripping of property values (using
> the attached script). Results for those servers I can currently test with:
> 
> SAP Netweaver: preserves whitespace and namespace prefixes
> 
> Apache/moddav 2.0.54: preserves whitespace, but not namespace prefixes.
> 
> Xythos (whatever release currently running on www.sharemation.com):
> preserves whitespace, but not namespace prefixes. Note that is also
> looses attributes in the property value (!).
> 
> IIS - will need to test: AFAIR, no mixed content supported at all.
> 
> So yes, those servers that do support mixed content also preserve
> whitespace.
> 
> Assuming that IIS is broken anyway (and is not going to be fixed anytime
> soon), we could potentially concentrate on Xythos and Apache/mod_dav.
> Xythos will need a fix for attribute rounbd-tripping anyway. Regarding
> mod_dav, maybe a fix for the missing prefix round-tripping is simple
> (anybody listening? Joe?).
> 
> 
> Best regards, Julian
> 
> 
> 
> 
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Out of curiosity, is this something most servers do or something that most
people have not implemented?


On 10/15/05 12:35 PM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> Proposed resolution for
> <http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=18>:
> 
> History:
> 
> The "force-authenticate" request header was initially proposed by Ilya
> Kirnos, and we had a discussion about this back three years ago
> <http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/thread.html#291>
> ). 
> As far as I can tell, the consensus back then was not to define a new
> header, but to make use of an "If" request header that was known to
> alway evaluate to false instead.
> 
> In January 2003, the WG had an interim meeting hosted by Apple, during
> which the problem was discussed again. Unfortunately, there doesn't seem
> to be any public record of what was discussed on the second day (which
> AFAIR was the day we discussed this topic). (Minutes for day one in
> <http://lists.w3.org/Archives/Public/w3c-dist-auth/2003JanMar/0075.html>).
> 
> The "Force-Authentication" header was then introduced in draft 03
> (<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-03.txt>),
> but I can't find any record of a consensus reached on the mailing list.
> 
> I therefore propose to remove the header from the spec, encouraging
> those who feel that this feature is needed to solve a real-world problem
> to restart the discussion on the mailing list (containing a precise
> problem statement, and an analysis why the current spec isn't sufficient
> in this regard).
> 
> In addition to removing section 9.4, further changes would be:
> 
> Section 17., para. 11:
> OLD:
> 
>     A resource can explicitly advertise its support for the revisions to
>     RFC2518 made in this document.  In particular, this allows clients to
>     use the Force-Authentication header on requests.  Class 1 must be
>     supported as well.  Class 2 MAY be supported.
> 
> NEW:
> 
>     A resource can explicitly advertise its support for the revisions to
>     RFC2518 made in this document.  Class 1 must be supported as well.
>     Class 2 MAY be supported.
> 
> 
> Section 17., para. 13:
> OLD:
> 
>     o  the Force-Authentication header.
> 
>     o  Any behavior that it supports, in the manner specified in this
>        document, rather than in the manner specified in RFC2518, for all
>        client requests.  A server MAY use an older behavior for specific
>        clients that are discovered to have interoperability problems with
>        the requirements of this specification, but MUST NOT use an older
>        behavior indiscriminately.
> 
> NEW:
> 
>     o  Any behavior that it supports, in the manner specified in this
>        document, rather than in the manner specified in RFC2518, for all
>        client requests.  A server MAY use an older behavior for specific
>        clients that are discovered to have interoperability problems with
>        the requirements of this specification, but MUST NOT use an older
>        behavior indiscriminately.
> 
> 
> Section 21., para. 8:
> OLD:
> 
>     Valuable contributions to RFC2518 bis came from some already named.
>     New contributors must also be gratefully acknowledged.  Julian
>     Reschke, Geoff Clemm, Joel Soderberg, and Dan Brotsky hashed out
>     specific text on the list or in meetings.  Ilya Kirnos supplied text
>     for Force-Authentication header.  Joe Hildebrand contributed as co-
>     chair.
> 
> NEW:
> 
>     Valuable contributions to RFC2518 bis came from some already named.
>     New contributors must also be gratefully acknowledged.  Julian
>     Reschke, Geoff Clemm, Joel Soderberg, and Dan Brotsky hashed out
>     specific text on the list or in meetings.  Joe Hildebrand contributed
>     as co-chair.
> 
> 
> Best regards, Julian
> --- draft-ietf-webdav-rfc2518bis-07.xml 2005-10-15 19:19:46.000000000 +0100
> +++ rfc2518bis-08-bug18.xml 2005-10-15 20:29:23.000000000 +0100
> @@ -3112,23 +3112,7 @@
>     to the remote server using PUT/PROPPATCH or another mechanism.
>      </t>
>    </section>
> -  
> -  <section title="Force-Authentication Header">
> -    <t>
> -   Force-Authentication = "Force-Authentication" ":" Method
> -    </t>
> -    <t>
> -   The Force-Authentication request header is used with the OPTIONS method to
> -   specify that the client wants to be challenged for authentication
> -   credentials to the resource identified by the Request-URI.  If
> -   present on a request to a WebDAV-compliant resource, the server MUST
> -   respond with either 401 (Unauthorized) or 501 (Not Implemented)
> -   status code. The Method value is used for the client to indicate
> -   what method it intends to use first on the resource identified in
> -   the Request-URI.
> -    </t>
> -  </section>
> -  
> +    
>    <section title="If Header">
>      <figure>
>        <artwork>
> @@ -4832,15 +4816,13 @@
>    <section title="Class 'bis'">
>      <t>
>     A resource can explicitly advertise its support for the revisions to
> -   RFC2518 made in this document. In particular, this allows clients to
> -   use the Force-Authentication header on requests.  Class 1 must be
> +   RFC2518 made in this document.  Class 1 must be
>     supported as well. Class 2 MAY be supported.
>      </t>
>      <t>
>     A resource that supports bis MUST support:
>      </t>
>      <t><list style="symbols">
> -      <t>the Force-Authentication header.  </t>
>        <t>Any behavior that it supports, in the manner specified in this
>     document, rather than in the manner specified in RFC2518, for all
>     client requests.  A server MAY use an older behavior for specific
> @@ -5200,8 +5182,7 @@
>     Valuable contributions to RFC2518 bis came from some already named.
>     New contributors must also be gratefully acknowledged. Julian
>     Reschke, Geoff Clemm, Joel Soderberg, and Dan Brotsky hashed out
> -   specific text on the list or in meetings. Ilya Kirnos supplied text
> -   for Force-Authentication header.  Joe Hildebrand contributed as
> +   specific text on the list or in meetings.  Joe Hildebrand contributed as
>     co-chair.
>    </t>
>  </section>




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Bernard Desruisseaux wrote:
> Item 21: Rely on namespace URIs, not prefixes
> 
>   A WebDAV server should be allowed to change any
>   namespace prefix.  "It's the URI that counts,
>   not the prefix".
> ...

It's the W3C who started to treat prefixes as significant; so even
though it may have been a bad idea in the first place, the cat is out of
the bag. Note that prefixes are also part of the most widely used XML
data models (DOM, XPath, XML Infoset).

Best regards,

Julian




From w3c-dist-auth-request@frink.w3.org Mon Oct 17 17:33:12 2005
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To: Cullen Jennings <fluffy@cisco.com>
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Cullen Jennings wrote:
> Do I have the summary right that there is only one server we know of that
> preservers namespaces?

One that preserves namespace URIs and namespace prefixes (SAP), two 
others that only preserve namespace URIs (Apache/mod_dav and Xythos).

Best regards, Julian




From w3c-dist-auth-request@frink.w3.org Mon Oct 17 17:33:26 2005
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The response to PROPPATCH in Section "8.3.2  Example - PROPPATCH"
contains a <D:status>HTTP/1.1 424 Failed Dependency</D:status>, but
the status code "424 Failed Dependency" is not listed in Section
"8.3.1  Status Codes for use with 207 (Multi-Status)".

While the list of status codes in Section 8.3.1 is not necessarily
exhaustive, I think the status code 424 should definitely be mentionned.

Cheers,
Bernard






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Cullen Jennings wrote:
> Do you really think this should be removed from the final RFC? On the call
> the other day I though you were going to do some testing and come up with
> some modifications for this text?

No, I think this is a misunderstanding. I really feel this text is both 
misleading, and doesn't resolve any issue I'm aware of.

I'd really like all of us to agree on the approach not to make any 
changes in the original spec unless we have a well-defined issue, and 
working group consensus how to resolve it. If it ain't broke, don't fix it.

Best regards, Julian




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Cullen Jennings wrote:
> Out of curiosity, is this something most servers do or something that most
> people have not implemented?

I'm not aware of any server implementing this, nor of any client using it.

Best regards, Julian




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Cc: WebDav <w3c-dist-auth@w3.org>, Cullen Jennings <fluffy@cisco.com>
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Me neither, but as a client implementor, we'd certainly like to use 
this or a reasonable substitute.  We have configuration information 
about the user's account/password on WebDAV servers, and can't even use 
it until the server thinks to do an authentication challenge.

Lisa

On Oct 17, 2005, at 2:36 PM, Julian Reschke wrote:

>
> Cullen Jennings wrote:
>> Out of curiosity, is this something most servers do or something that 
>> most
>> people have not implemented?
>
> I'm not aware of any server implementing this, nor of any client using 
> it.
>
> Best regards, Julian
>





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From: Lisa Dusseault <lisa@osafoundation.org>
Date: Mon, 17 Oct 2005 17:35:14 -0700
To: Julian Reschke <julian.reschke@gmx.de>
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What about changing it to a MUST?  That makes it even more clear (and  
we will get complaints about lower-case 'must' in the text)

Lisa

On Oct 16, 2005, at 8:42 AM, Julian Reschke wrote:

>
> bugzilla@soe.ucsc.edu wrote:
>> http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=19
>> lisa@osafoundation.org changed:
>>            What    |Removed                     |Added
>> ---------------------------------------------------------------------- 
>> ------
>>              Status|NEW                         |ASSIGNED
>> ------- Additional Comments From lisa@osafoundation.org  2005-10-15  
>> 16:27 -------
>> Fixed for draft version -08.
>> ...
>
> The change I see is:
>
> Section 9., para. 30:
> OLD:
>
>    The If request header is intended to have similar functionality to
>    the If-Match header defined in section 14.24 of RFC2616 [7].   
> However
>    the If header is intended for use with any URI which represents  
> state
>    information, referred to as a state token, about a resource as well
>    as ETags.  A typical example of a state token is a lock token, and
>    lock tokens are the only state tokens defined in this specification.
>    The <DAV:no-lock> state token is a special token that must never
>    match an actual valid lock token.  The purpose of this is described
>    in section 9.5.5.
>
> NEW:
>
>    The If request header is intended to have similar functionality to
>    the If-Match header defined in section 14.24 of RFC2616 [7].   
> However
>    the If header is intended for use with any URI which represents  
> state
>    information, referred to as a state token, about a resource as well
>    as ETags.  A typical example of a state token is a lock token, and
>    lock tokens are the only state tokens defined in this specification.
>    The <DAV:no-lock> state token is an example of a state token that
>    must never match an actual valid lock token.  The purpose of this is
>    described in Section 9.5.3.
>
>
> I'd say "will never match" instead if "must never match", because  
> that's by definition, not because we tell server implementors to  
> behave that way.
>
> Best regards, Julian
>





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Lisa Dusseault wrote:
> 
> What about changing it to a MUST?  That makes it even more clear (and  
> we will get complaints about lower-case 'must' in the text)

Again: this follows by definition (only an IETF document/activity cab 
put things into the DAV: namespace, thus a URI using the DAV: scheme 
never can identify a valid lock token).

Furthermore, keep in mind that RFC2119 explicitly asks for using 
capitalized words sparingly.

Best regards, Julian




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Lisa Dusseault wrote:
> 
> Me neither, but as a client implementor, we'd certainly like to use this 
> or a reasonable substitute.  We have configuration information about the 
> user's account/password on WebDAV servers, and can't even use it until 
> the server thinks to do an authentication challenge.

As it has been in drafts for 2.5 years with nobody implementing it, I'd 
say it doesn't belong into a spec revision that's supposed to advance in 
the standards ladder.

Best regards, Julian




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This is a multi-part message in MIME format.
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OK,

> I tried to diff the xml file downloaded from my URL vs. the one from  yours and unfortunately the diff is garbage, showing every line  different.  It's probably something stupid like line returns, but it's  a pain in the ass figuring out what's actually changed.   If you  provide a diff I'll check it out further. 

attached is a patch for the file that was on 
<http://ietf.webdav.org/webdav/rfc2518bis> as of today.

Best regards, Julian




--------------080106020101080206070008
Content-Type: text/plain;
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1a2
> <?xml-stylesheet type=3D'text/xsl' href=3D'rfc2629.xslt' ?>
22c23
< <rfc ipr=3D"full3978" docName=3D"draft-ietf-webdav-rfc2518bis-07">
---
> <rfc ipr=3D"full3978" docName=3D"draft-ietf-webdav-rfc2518bis-latest">
43c44
< <date month=3D"July" year=3D"2005" />
---
> <date month=3D"October" year=3D"2005" />
1014c1015
<    because it is acting with principal A=A1s credential, is allowed to=20
---
>    because it is acting with principal A's credential, is allowed to=20
1358c1359
<    If a server allows resource names to include characters that aren=A1=
t=20
---
>    If a server allows resource names to include characters that aren't=20
2392c2393
<    412 (Precondition Failed) =A4 A condition failed, e.g. the Overwrite=
=20
---
>    412 (Precondition Failed) - A condition failed, e.g. the Overwrite=20
3582c3583
<    full URIs aren=A1t used in other headers. WebDAV specifies full URLs=
=20
---
>    full URIs aren't used in other headers. WebDAV specifies full URLs=20
4395c4396
<             not cause a resource=A1s ETag to change.  </t>
---
>             not cause a resource's ETag to change.  </t>
4458,4459c4459,4460
<             =89activelock=A1 elements.  If there is one or more lock, a=
n=20
<             =89activelock=A1 element appears for each lock on the resou=
rce.</t> =20
---
>             "activelock" elements.  If there is one or more lock, an=20
>             "activelock" element appears for each lock on the resource.=
</t> =20

--------------080106020101080206070008--




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I agree that this should be removed from the draft text until we have 
consensus that this resolves some significant issue (and like Julian,
I have not seen a compelling argument that it does).

And I agree that changes should not be made to the current draft until 
there
is at least consensus on the mailing list that there is a well-defined 
issue
that needs to be addressed.

Cheers,
Geoff

Julian wrote on 10/17/2005 05:35:40 PM:

> 
> Cullen Jennings wrote:
> > Do you really think this should be removed from the final RFC? On the 
call
> > the other day I though you were going to do some testing and come up 
with
> > some modifications for this text?
> 
> No, I think this is a misunderstanding. I really feel this text is both 
> misleading, and doesn't resolve any issue I'm aware of.
> 
> I'd really like all of us to agree on the approach not to make any 
> changes in the original spec unless we have a well-defined issue, and 
> working group consensus how to resolve it. If it ain't broke, don't fix 
it.
> 
> Best regards, Julian
> 

--=_alternative 0041FE1A8525709E_=
Content-Type: text/html; charset="US-ASCII"


<br><font size=2><tt>I agree that this should be removed from the draft
text until we have </tt></font>
<br><font size=2><tt>consensus that this resolves some significant issue
(and like Julian,</tt></font>
<br><font size=2><tt>I have not seen a compelling argument that it does).</tt></font>
<br>
<br><font size=2><tt>And I agree that changes should not be made to the
current draft until there</tt></font>
<br><font size=2><tt>is at least consensus on the mailing list that there
is a well-defined issue</tt></font>
<br><font size=2><tt>that needs to be addressed.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br><font size=2><tt>Julian wrote on 10/17/2005 05:35:40 PM:<br>
<br>
&gt; <br>
&gt; Cullen Jennings wrote:<br>
&gt; &gt; Do you really think this should be removed from the final RFC?
On the call<br>
&gt; &gt; the other day I though you were going to do some testing and
come up with<br>
&gt; &gt; some modifications for this text?<br>
&gt; <br>
&gt; No, I think this is a misunderstanding. I really feel this text is
both <br>
&gt; misleading, and doesn't resolve any issue I'm aware of.<br>
&gt; <br>
&gt; I'd really like all of us to agree on the approach not to make any
<br>
&gt; changes in the original spec unless we have a well-defined issue,
and <br>
&gt; working group consensus how to resolve it. If it ain't broke, don't
fix it.<br>
&gt; <br>
&gt; Best regards, Julian<br>
&gt; <br>
</tt></font>
--=_alternative 0041FE1A8525709E_=--




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Cc: WebDav <w3c-dist-auth@w3.org>, Cullen Jennings <fluffy@cisco.com>
From: Lisa Dusseault <lisa@osafoundation.org>
Date: Tue, 18 Oct 2005 09:20:41 -0700
To: Julian Reschke <julian.reschke@gmx.de>
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Nobody says they implement 'bis' yet, as far as I know.  And clients 
can't support it until the server does.

Lisa

On Oct 18, 2005, at 12:52 AM, Julian Reschke wrote:

> Lisa Dusseault wrote:
>> Me neither, but as a client implementor, we'd certainly like to use 
>> this or a reasonable substitute.  We have configuration information 
>> about the user's account/password on WebDAV servers, and can't even 
>> use it until the server thinks to do an authentication challenge.
>
> As it has been in drafts for 2.5 years with nobody implementing it, 
> I'd say it doesn't belong into a spec revision that's supposed to 
> advance in the standards ladder.
>
> Best regards, Julian





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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=26

julian.reschke@greenbytes.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED





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This is a multi-part message in MIME format.
--------------070409070905010002090203
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: quoted-printable
X-MIME-Autoconverted: from 8bit to quoted-printable by ietf.org id OAA22159

Proposed resolution for=20
<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D26>:

As far as I can tell, the current draft of RFC2518bis changes the end of=20
the description for PROPFIND from:

"All servers MUST support returning a response of content type text/xml=20
or application/xml that contains a multistatus XML element that=20
describes the results of the attempts to retrieve the various properties.

If there is an error retrieving a property then a proper error result=20
MUST be included in the response. A request to retrieve the value of a=20
property which does not exist is an error and MUST be noted, if the=20
response uses a multistatus XML element, with a response XML element=20
which contains a 404 (Not Found) status value.

Consequently, the multistatus XML element for a collection resource with=20
member URIs MUST include a response XML element for each member URI of=20
the collection, to whatever depth was requested. Each response XML=20
element MUST contain an href XML element that gives the URI of the=20
resource on which the properties in the prop XML element are defined.=20
Results for a PROPFIND on a collection resource with internal member=20
URIs are returned as a flat list whose order of entries is not significan=
t.

In the case of allprop and propname, if a principal does not have the=20
right to know whether a particular property exists then the property=20
should be silently excluded from the response."=20
(<http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.8.1.p.4>)

to

"All servers MUST support returning a response of content type text/xml=20
or application/xml that contains a multistatus XML element that=20
describes the results of the attempts to retrieve the various=20
properties. The multistatus contains one response element for each=20
resource in the scope of the request (in no required order) or may be=20
empty if no resources match the request.

If there is an error retrieving a property then a proper error result=20
MUST be included in the response. A request to retrieve the value of a=20
property which does not exist is an error and MUST be noted, if the=20
response uses a multistatus XML element, with a response XML element=20
which contains a 404 (Not Found) status value.

Consequently, the multistatus XML element for a collection resource with=20
member URLs MUST include a response XML element for each member URL of=20
the collection, to whatever depth was requested. Each response XML=20
element MUST contain an href XML element that gives the URL of the=20
resource on which the properties in the prop XML element are defined.=20
URLs for collections appearing in the results MUST end in a slash=20
character. Results for a PROPFIND on a collection resource with internal=20
member URLs are returned as a flat list whose order of entries is not=20
significant.

A server enumerating the members of a collection using absolute URLs in=20
a PROPFIND response MUST use a common prefix in those URLs, and that=20
prefix MUST be the absolute URL used in the response to refer to the=20
parent collection.

Unless otherwise notified, clients may expect that the URL for the=20
parent collection in the PROPFIND response will be the same URL that was=20
used to refer to the parent collection in the PROPFIND request. Servers=20
MAY use an alternate URL for the parent collection in a PROPFIND=20
response, but in this case the server MUST include a Content-Location=20
header whose value is the fully-qualified URL used by the server to=20
refer to the parent collection in this response.

URLs in a PROPFIND response body MAY be represented as fully- qualified=20
URLs, in which case they must all contain the full parent collection URL=20
(scheme, host, port, and absolute path). Alternatively, these URLs MAY=20
be absolute paths (not containing scheme, host or port), but in this=20
case they must all still contain the full parent collection path.

If a server allows resource names to include characters that aren=EDt=20
legal in HTTP URL paths, these characters must be URI-escaped on the=20
wire. For example, it is illegal to use a space character or double-=20
quote in a URI [5]. URIs appearing in PROPFIND or PROPPATCH XML bodies=20
(or other XML marshalling defined in this specification) are still=20
subject to all URI rules, including forbidden characters.

Properties may be subject to access control. In the case of allprop and=20
propname, if a principal does not have the right to know whether a=20
particular property exists then the property MAY be silently excluded=20
from the response."=20
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#r=
fc.section.8.2.p.7>)

The problems that I see here are

- it makes statements about the multistatus format, which applies to=20
other methods than PROPFIND as well,

- consequently, it repeats lots of things that appear in section 12=20
("multistatus") in different words

- it throws in discussion of escaping "native" resource names to URIs,=20
which is really a completely different topic (and again has nothing to=20
do with PROPFIND at all)

- it makes a new MUST-level requirement about collection URLs ending in=20
slashes that as far as I can tell has no WG consensus

- it incorrectly claims that PROPFIND may result in an empty multistatus=20
element

My proposal would be to remove all of these changes, but to add a=20
forward reference to section 12 instead. We then should concentrate on=20
getting section 12 right (which, funny enough, has it's own ticket=20
<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D46>).

So the proposed change would be:

Section 8., para. 30:
OLD:

    All servers MUST support returning a response of content type text/
    xml or application/xml that contains a multistatus XML element that
    describes the results of the attempts to retrieve the various
    properties.  The multistatus contains one response element for each
    resource in the scope of the request (in no required order) or may be
    empty if no resources match the request.

NEW:

    All servers MUST support returning a response of content type text/
    xml or application/xml that contains a multistatus XML element that
    describes the results of the attempts to retrieve the various
    properties.


Section 8., para. 32:
OLD:

    Consequently, the multistatus XML element for a collection resource
    with member URLs MUST include a response XML element for each member
    URL of the collection, to whatever depth was requested.  Each
    response XML element MUST contain an href XML element that gives the
    URL of the resource on which the properties in the prop XML element
    are defined.  URLs for collections appearing in the results MUST end
    in a slash character.  Results for a PROPFIND on a collection
    resource with internal member URLs are returned as a flat list whose
    order of entries is not significant.

NEW:

    Consequently, the multistatus XML element for a collection resource
    with member URLs MUST include a response XML element for each member
    URL of the collection, to whatever depth was requested.  Each
    response XML element MUST contain an href XML element that gives the
    URL of the resource on which the properties in the prop XML element
    are defined (see Section 13.15 for a discussion of allowable values
    inside the href elements).  Results for a PROPFIND on a collection
    resource with internal member URLs are returned as a flat list whose
    order of entries is not significant.


Section 8., para. 33:
OLD:

    A server enumerating the members of a collection using absolute URLs
    in a PROPFIND response MUST use a common prefix in those URLs, and
    that prefix MUST be the absolute URL used in the response to refer to
    the parent collection.

    Unless otherwise notified, clients may expect that the URL for the
    parent collection in the PROPFIND response will be the same URL that
    was used to refer to the parent collection in the PROPFIND request.
    Servers MAY use an alternate URL for the parent collection in a
    PROPFIND response, but in this case the server MUST include a
    Content-Location header whose value is the fully-qualified URL used
    by the server to refer to the parent collection in this response.

    URLs in a PROPFIND response body MAY be represented as fully-
    qualified URLs, in which case they must all contain the full parent
    collection URL (scheme, host, port, and absolute path).
    Alternatively, these URLs MAY be absolute paths (not containing
    scheme, host or port), but in this case they must all still contain
    the full parent collection path.

    If a server allows resource names to include characters that aren't
    legal in HTTP URL paths, these characters must be URI-escaped on the
    wire.  For example, it is illegal to use a space character or double-
    quote in a URI [5].  URIs appearing in PROPFIND or PROPPATCH XML
    bodies (or other XML marshalling defined in this specification) are
    still subject to all URI rules, including forbidden characters.

    Properties may be subject to access control.  In the case of allprop
    and propname, if a principal does not have the right to know whether
    a particular property exists then the property MAY be silently
    excluded from the response.

NEW:

    Properties may be subject to access control.  In the case of allprop
    and propname, if a principal does not have the right to know whether
    a particular property exists then the property MAY be silently
    excluded from the response.


Best regards, Julian



--------------070409070905010002090203
Content-Type: text/plain;
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Content-Disposition: inline;
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Content-Transfer-Encoding: 7bit

--- draft-ietf-webdav-rfc2518bis-latest.xml	2005-10-18 19:36:56.000000000 +0100
+++ draft-ietf-webdav-rfc2518bis-latest.26.xml	2005-10-18 19:49:47.000000000 +0100
@@ -1308,9 +1308,7 @@
    All servers MUST support returning a response of content type 
    text/xml or application/xml that contains a multistatus XML element 
    that describes the results of the attempts to retrieve the various 
-   properties.  The multistatus contains one response element for each 
-   resource in the scope of the request (in no required order) or may
-   be empty if no resources match the request. 
+   properties. 
     </t>
     <t>
    If there is an error retrieving a property then a proper error 
@@ -1325,42 +1323,11 @@
    URL of the collection, to whatever depth was requested. Each 
    response XML element MUST contain an href XML element that gives the 
    URL of the resource on which the properties in the prop XML element 
-   are defined.  URLs for collections appearing in the results MUST end 
-   in a slash character.  Results for a PROPFIND on a collection 
+   are defined (see <xref target="multistatus"/>
+   for a discussion of allowable values inside the href elements).  Results
+   for a PROPFIND on a collection 
    resource with internal member URLs are returned as a flat list whose 
-   order of entries is not significant. 
-    </t>
-    <t>
-   A server enumerating the members of a collection using absolute URLs 
-   in a PROPFIND response MUST use a common prefix in those URLs, and 
-   that prefix MUST be the absolute URL used in the response to refer 
-   to the parent collection.  
-    </t>
-    <t>
-   Unless otherwise notified, clients may expect that the URL for the 
-   parent collection in the PROPFIND response will be the same URL that 
-   was used to refer to the parent collection in the PROPFIND request.  
-   Servers MAY use an alternate URL for the parent collection in a 
-   PROPFIND response, but in this case the server MUST include a 
-   Content-Location header whose value is the fully-qualified URL used 
-   by the server to refer to the parent collection in this response.   
-    </t>
-
-    <t>
-   URLs in a PROPFIND response body MAY be represented as fully-
-   qualified URLs, in which case they must all contain the full parent 
-   collection URL (scheme, host, port, and absolute path).  
-   Alternatively, these URLs MAY be absolute paths (not containing 
-   scheme, host or port), but in this case they must all still contain 
-   the full parent collection path. 
-    </t>
-    <t>
-   If a server allows resource names to include characters that aren't 
-   legal in HTTP URL paths, these characters must be URI-escaped on the 
-   wire. For example, it is illegal to use a space character or double-
-   quote in a <xref target="RFC2396">URI</xref>.  URIs appearing in PROPFIND or PROPPATCH 
-   XML bodies (or other XML marshalling defined in this specification) 
-   are still subject to all URI rules, including forbidden characters. 
+   order of entries is not significant.  
     </t>
     <t>
    Properties may be subject to access control. In the case of allprop 
@@ -3923,7 +3890,7 @@
     
   </section>
   
-  <section title="multistatus XML Element">
+  <section title="multistatus XML Element" anchor="multistatus">
        <t><list style="hanging">
       <t hangText="Name: ">multistatus</t>
   <t hangText="Namespace: ">DAV:</t> 

--------------070409070905010002090203--




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I support a solution along the lines of force-authenticate. There are  
many times when a client would like to validate its ability to  
perform actions against a resource before performing an expensive  
network operation against that resource.

Julian--I don't think lack of implementation is a sufficient counter- 
argument. Why do you think that this feature hasn't been implemented  
(why haven't you implemented it, for example?)

- Jim




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I agree with Julian's suggested text change ("will never match"  
instead of "must never match").

- Jim


On Oct 18, 2005, at 12:13 AM, Julian Reschke wrote:

>
> Lisa Dusseault wrote:
>
>> What about changing it to a MUST?  That makes it even more clear  
>> (and  we will get complaints about lower-case 'must' in the text)
>>
>
> Again: this follows by definition (only an IETF document/activity  
> cab put things into the DAV: namespace, thus a URI using the DAV:  
> scheme never can identify a valid lock token).
>
> Furthermore, keep in mind that RFC2119 explicitly asks for using  
> capitalized words sparingly.
>
> Best regards, Julian
>





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>>
>> in the meantime RFC2396 has been obsoleted, and RFC3986 makes  
>> "DAV:" a legal URI (<http://greenbytes.de/tech/webdav/ 
>> rfc3986.html#rfc.section.D.2.p.4>). Thus I'd simply this to:
>>

Amazing. Never thought that would happen!

- Jim




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Jim Whitehead wrote:
> 
> I support a solution along the lines of force-authenticate. There are  
> many times when a client would like to validate its ability to  perform 
> actions against a resource before performing an expensive  network 
> operation against that resource.

I don't argue that. The last time the WG (ie, the mailing list) 
discussed this, the consensus was to use an If header that would be 
known to fail. There is no written record of what we discussed later at 
the face to face meeting, and I frankly can't remember. So this is a 
process issue -- if it's supposed to become part of WebDAV, it has to 
make it through the process of (1) define what the problem is, then (2) 
find a WG consensus of how to resolve this. "Force-Authenticate" may 
very well be the solution.

Then again, if we want to *progress* in the standards ladder, I don't 
think we can put in a MUST-level requirement that hasn't been 
implemented by anybody although it has been in the draft for 2,5 years. 
If we're satisfied in just revising the spec at the same standards 
level, that's a different story (but then we should apply the same 
metrics to other things we're talking about, such as preserving 
namespace prefixes in properties which has at least *one* implementation).

> Julian--I don't think lack of implementation is a sufficient counter- 
> argument. Why do you think that this feature hasn't been implemented  
> (why haven't you implemented it, for example?)

We didn't implement it because

(1) no client asked for it and

(2) our server doesn't support non-authenticated access anyway.

On the other hand, Lisa has been working for a vendor that sells both 
servers and clients, so I'd be really interested to hear why it wasn't 
implemented over there? Maybe it's not that essential after all?

This really smells like a nice-to-have, in which case it certainly 
doesn't belong into a "Draft" revision of RFC2518bis.

Best regards, Julian




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I just don't think we will every finish if we have to review every single
little change on the list before it is made. I would rather assume that the
editor of a document can mostly get it right, then fix what they get wrong
instead of assuming that they will get it all wrong.

We call these things drafts because they are a draft for the WG to review,
comment on, and fix. We call the folks writing them an author because they
are taking their best stab at coming up with a draft that the WG can form
consensus around. Now when it is a WG drafts, such as this one, the author
does need to reflect the things WG agreed to into the document because in
the end it will not move forward without WG consensus. If the author of a
working group document is maliciously failing to put in the things the WG
has agreed to, I will find a new author for the document. However, lets not
confuse this with the author trying to find some draft text that we can all
agree to and then having the WG help refine that text until it is something
we can all live with.

A natural difficulty with this is that it is non trivial to see all the
change to a document. I really don't know any way to solve this other than
diff tools. It good to catch the major diffs in the changes section of the
document but it's unreasonable to get all the trivial ones. The changes
being made to this document are small enough and local enough that it is not
that hard to catch them with diff.

I'm saying this poorly - it's hard to describe the difference between
reasonable changes and an author being way off in left field and introducing
garbage that the WG would never agree to.

I really like us to focus on what changes to we have to make to draft to get
it to the point it is all something we can live with. I hope the bugs are a
way of focusing on these issues.

Cullen

PS. Consider this email a draft :-) I (and we) might have to refine it a few
times before I get it right.


On 10/17/05 12:47 PM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> 
> Clarifying...
> 
> I'd like to see stuff put into the draft *after* it has been discussed
> on the list, or at least that changes that are made are announced to the
> list for review. In the past, people have burned lots of cycles trying
> to find out what changed without notice, and reporting issues with these
> changes. It would really be nice if we could avoid that in the future.
> 
> Best regards, Julian
> 
> 
> 
> Lisa Dusseault wrote:
>> 
>> 
>> The text on hosting malicious scripts was suggested by Barry Lind.
>> 
>> I put in the summary of changes in response to your suggestion on the
>> phone, Julian.
>> 
>> Cullen, could you please respond about putting proposed text in the
>> working copy of the draft either posted at ietf.webdav.org/webdav  or
>> submitted to Internet-Drafts archive.
>> 
>> Lisa
>> 
>> On Oct 16, 2005, at 9:10 AM, Julian Reschke wrote:
>> 
>>> 
>>> Hi,
>>> 
>>> I was looking at the current edits and couldn't help noticing that it
>>> again contains stuff that wasn't announced at all. As far as I can
>>> tell, drafts submitted to the IETF should optimally represent the
>>> working group's consensus, and putting in stuff silently into the
>>> working edits doesn't seem to be the best way to achieve this.
>>> 
>>> In particular:
>>> 
>>> 1) "Hosting malicious scripts executed on client machines"
>>> (http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-
>>> latest.html#rfc.section.19.8>) looks interesting; but I don't see an
>>> issue raised for this topic. In particular, the recommendation to
>>> strip script from HTML pages looks a fishy (upon GET? PUT? for all
>>> users?). This certainly needs more discussion if this should be added
>>> to the spec.
>>> 
>>> 2) Summary of changes from RFC2518
>>> (<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-
>>> latest.html#rfc.section.B.3.1>):
>>> 
>>>> B.3.1  Summary of changes from RFC2518
>>>>    This section describes changes that are likely to result in
>>>>    implementation changes due to tightened requirements or changed
>>>>    behavior.  A more complete list of changes has been published in a
>>>>    separate document.
>>> 
>>> 
>>> Really? I think readers of the spec really would prefer to have a
>>> complete (not only a "more complete") list right here.
>>> 
>>>> B.3.1.1  Changes Notable to Server Implementors
>>>>    Tightened requirements for storing property  values (Section 4.4)
>>>>    when "xml:lang" appears and also when values are XML fragments
>>>>    (specifically on preserving prefixes, namespaces and whitespace.)
>>>>    Several tightened requirements for general response  handling
>>>>    (Section 8.1), including response bodies for use with errors, use  of
>>>>    Date header, ETag and Location header.
>>> 
>>> 
>>> - The response bodies for errors are optional, right?
>>> - What did change regarding the other response headers?
>>> 
>>>>    Tightened requirements for URL construction in PROPFIND (Section
>>>> 8.2)
>>>>    responses.
>>>>    Tightened requirements for checking identity of lock  owners
>>>>    (Section 7.1) during operations affected by locks.
>>>>    Tightened requirements for copying properties (Section 8.9.2) and
>>>>    moving properties (Section 8.10.1).
>>> 
>>> 
>>> (to be discussed)
>>> 
>>>>    Tightened requirements on preserving owner field in locks
>>>>    (Section 8.11).  Added "lockroot" element to lockdiscovery
>>>>    information.
>>>>    New value for "DAV:" header (Section 9.1) to advertise support for
>>>>    this specification.
>>>>    Tightened requirement for "Destination:"  header (Section 9.3) to
>>>>    work with path values
>>>>    New "Force-Authentication:" (Section 9.4) header added.
>>>>    Several changes for "If:" header (Section 9.5), including
>>>> requirement
>>>>    to accept commas and "DAV:no-lock" state token.
>>> 
>>> 
>>> "DAV:no-lock" is no new requirement.
>>> 
>>>>    Support for UTF-16 now required (ref (Section 18)).
>>> 
>>> 
>>> I don't think the requirement changed. The spec merely wasn't
>>> properly  repeating what XML defines, and this was fixed.
>>> 
>>>>    Removed definition of "source" property and special handling for
>>>>    dynamic resources
>>>>    Replaced lock-null resources with simpler locked empty resources
>>>>    (Section 7.6)
>>>> B.3.1.2  Changes Notable to Client Implementors
>>>>    Tightened requirements for supporting WebDAV collections
>>>>    (Section 5.2) within resources that do not support WebDAV (e.g.
>>>>    servlet containers).
>>>>    Redefined 'allprop' PROPFIND requests so that the server does not
>>>>    have to return all properties.
>>> 
>>> 
>>> That affects servers as well, right? Maybe splitting the list in two
>>> parts isn't worthwhile.
>>> 
>>>>    Required to handle empty multistatus responses in PROPFIND
>>>> responses
>>>>    (Section 8.2)
>>>>    No more "propertybehavior" specification allowed in MOVE and COPY
>>>>    requests
>>>>    Support for UTF-16 now required (ref (Section 18)).
>>>>    Removed definition of "source" property and special handling for
>>>>    dynamic resources.
>>> 
>>> 
>>> Missing changes:
>>> 
>>> - PROPFIND dead-props
>>> (<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-
>>> latest.html#rfc.section.13.28>)
>>> 
>>> - implicit lock refresh removed (see
>>> <http://greenbytes.de/tech/webdav/draft-reschke-webdav-locking-
>>> latest.html#rfc.section.B.1.1>)
>>> 
>>> ...and potentially more.
>>> 
>>> Best regards, Julian
>>> 
>>> 
>> 
>> 
>> 
> 




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On 10/18/05 5:06 AM, "Geoffrey M Clemm" <geoffrey.clemm@us.ibm.com> wrote:

> 
> I agree that this should be removed from the draft text until we have
> consensus that this resolves some significant issue (and like Julian,
> I have not seen a compelling argument that it does).

I have no opinion if this should be there or not and I'm fine if we come to
agreement to remove it. I have fairly good notes from the call and well, no
real point in going there. Needless to say, if we come to agreement on the
list that is the important thing.
 
> And I agree that changes should not be made to the current draft until there
> is at least consensus on the mailing list that there is a well-defined issue
> that needs to be addressed.

Clearly there is a well define basic issue - the spec if not clear enough on
what implementers should do and/or wrong. That is the main reason we are
doing a bis. We all agree on this. I suspect the author thought this text
was a small clarification to help on this basic issue.

If an author tried to put in some text that they thought would be agreeable
to group to try and make the draft better - well it depends, hopefully big
things they would get WG input on then take a stab at fixing. On small
things they would just fix. It is a judgment call on if something is small
or large. They author will not always get this judgment call right and we as
a group will fix it.

I just don't see how we can finish if the author can't change the document.

Cullen


> 
> Cheers, 
> Geoff 
> 
> Julian wrote on 10/17/2005 05:35:40 PM:
> 
>> 
>> Cullen Jennings wrote:
>>> Do you really think this should be removed from the final RFC? On the call
>>> the other day I though you were going to do some testing and come up with
>>> some modifications for this text?
>> 
>> No, I think this is a misunderstanding. I really feel this text is both
>> misleading, and doesn't resolve any issue I'm aware of.
>> 
>> I'd really like all of us to agree on the approach not to make any
>> changes in the original spec unless we have a well-defined issue, and
>> working group consensus how to resolve it. If it ain't broke, don't fix it.
>> 
>> Best regards, Julian
>> 
> 





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I will not be able to join the call this Friday but all the dial in
information is as usual. If there is some problem with the bridge call my
cell. Thanks, Cullen




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Cullen Jennings wrote:
> 
> I just don't think we will every finish if we have to review every single
> little change on the list before it is made. I would rather assume that the
> editor of a document can mostly get it right, then fix what they get wrong
> instead of assuming that they will get it all wrong.
> 
> We call these things drafts because they are a draft for the WG to review,
> comment on, and fix. We call the folks writing them an author because they
> are taking their best stab at coming up with a draft that the WG can form
> consensus around. Now when it is a WG drafts, such as this one, the author
> does need to reflect the things WG agreed to into the document because in
> the end it will not move forward without WG consensus. If the author of a
> working group document is maliciously failing to put in the things the WG
> has agreed to, I will find a new author for the document. However, lets not
> confuse this with the author trying to find some draft text that we can all
> agree to and then having the WG help refine that text until it is something
> we can all live with.
> 
> A natural difficulty with this is that it is non trivial to see all the
> change to a document. I really don't know any way to solve this other than
> diff tools. It good to catch the major diffs in the changes section of the
> document but it's unreasonable to get all the trivial ones. The changes
> being made to this document are small enough and local enough that it is not
> that hard to catch them with diff.
> 
> I'm saying this poorly - it's hard to describe the difference between
> reasonable changes and an author being way off in left field and introducing
> garbage that the WG would never agree to.
> 
> I really like us to focus on what changes to we have to make to draft to get
> it to the point it is all something we can live with. I hope the bugs are a
> way of focusing on these issues.
> 
> Cullen
> 
> PS. Consider this email a draft :-) I (and we) might have to refine it a few
> times before I get it right.

OK,

a few questions:

- how many people have been reviewing each of these drafts?

- can anybody say with confidence what has changed since RFC2518?

- does any server implementor think that (s)he has a compliant 
implementation of what's in?


The answers we *should* be getting are:

-> the majority of the WG members

-> see above

-> most of the active implementors of servers


However I'm pretty sure the actual situation is different, and I think 
this is caused by the way how the editorial process has been working in 
the past.

The fact that we only have little participation nowadays even makes it 
more important that those who want to contribute it can do that 
effectively. Right now, I don't have the impression that the time I have 
spent in the past years has been effective at all.


Best regards, Julian





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Cullen Jennings wrote:
> 
> I will not be able to join the call this Friday but all the dial in
> information is as usual. If there is some problem with the bridge call my
> cell. Thanks, Cullen

OK,

I'm attaching a calendar entry for Friday's meeting (which will be at 
16.30 UTC). Let's discuss resolution of the issues we assigned last 
week, and try to assign some more for the next week.

Cullen, for next week I'd really like to have the following topics on 
the agenda:

- status of BIND (to be submitted as "proposed")?

- status of REDIRECT (to be submitted as "experimental")?

- progress of PROPERTY-DATATYPES and QUOTA in the RFC Editor's 
publication queue

- editorial process for RFC2518bis

Best regards, Julian




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BEGIN:VCALENDAR
BEGIN:VEVENT
UID
 :8c7f1360-34fa-11da-a80e-df1257e30ca2
SUMMARY
 :WebDAV WG conference call
DESCRIPTION
 :Meeting ID:             251807\nMeeting Password:  \nPhone Numbers: 
  1-866-MEETME9 (US Toll-free)\n                        1-650-260-9030 
 (Local/International)
CATEGORIES
 :WebDAV
URL
 :http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0081.html
CLASS
 :PUBLIC
DTSTART
 :20051021T163000Z
DTEND
 :20051021T180000Z
DTSTAMP
 :20051004T171529Z
END:VEVENT
END:VCALENDAR

--------------030602060808080309080701--




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=12

julian.reschke@greenbytes.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED





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From w3c-dist-auth-request@frink.w3.org Wed Oct 19 08:08:37 2005
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Proposed resolution for 
<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=12>:

This is about section 8.1.3, which currently says:

"8.1.3 Use of Location header in responses

When the Location header is used in a response, it is used by the server 
to indicate the preferred address for the target resource of the 
request. Whenever the server has a preferred address, it should use that 
address consistently. This means that when a response contains a 
Location header, all the URLs in the response body (e.g. a Multi-Status) 
should be consistent (most importantly, should use the same host and 
port)." 
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.8.1.3>)

I really have no idea what this is about. HTTP (RFC2616) defines 
"Location" as:

"14.30 Location

The Location response-header field is used to redirect the recipient to 
a location other than the Request-URI for completion of the request or 
identification of a new resource. For 201 (Created) responses, the 
Location is that of the new resource which was created by the request. 
For 3xx responses, the location SHOULD indicate the server's preferred 
URI for automatic redirection to the resource. The field value consists 
of a single absolute URI.


        Location       = "Location" ":" absoluteURI

An example is:

        Location: http://www.w3.org/pub/WWW/People.html

     Note: The Content-Location header field (Section 14.14) differs 
from Location in that the Content-Location identifies the original 
location of the entity enclosed in the request. It is therefore possible 
for a response to contain header fields for both Location and 
Content-Location. Also see Section 13.10 for cache requirements of some 
methods." 
(<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.14.30>)


Unless somebody can explain what the connection between URLs in response 
bodies and the "Location" response header is, I'd suggest to get rid of 
this paragraph (patch attached).

Best regards, Julian


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--- draft-ietf-webdav-rfc2518bis-latest.xml	2005-10-19 12:59:48.000000000 +0100
+++ draft-ietf-webdav-rfc2518bis-latest.12.xml	2005-10-19 12:59:34.000000000 +0100
@@ -1144,18 +1144,6 @@
       </t>
     </section>  
     
-    <section title="Use of Location header in responses">
-      <t>
-   When the Location header is used in a response, it is used by the 
-   server to indicate the preferred address for the target resource of 
-   the request.  Whenever the server has a preferred address, it should 
-   use that address consistently.  This means that when a response 
-   contains a Location header, all the URLs in the response body (e.g. 
-   a Multi-Status) should be consistent (most importantly, should use 
-   the same host and port). 
-      </t>
-    </section>
-    
     <section title="Required Response Headers: Date">
       <t>
    Note that HTTP 1.1 requires the Date header in all responses if 

--------------090201020407050407060306--




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=169

           Summary: Date header required?
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://greenbytes.de/tech/webdav/draft-ietf-webdav-
                    rfc2518bis-07.html#rfc.section.8.1.4
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


The spec currently says:

"8.1.4 Required Response Headers: Date

Note that HTTP 1.1 requires the Date header in all responses if possible."

This is misleading; RFC2616 contains a long description of when "Date" is
required, in particular:

- snip -
   1. If the response status code is 100 (Continue) or 101 (Switching
Protocols), the response MAY include a Date header field, at the server's option.
   2. If the response status code conveys a server error, e.g. 500 (Internal
Server Error) or 503 (Service Unavailable), and it is inconvenient or impossible
to generate a valid Date.
   3. If the server does not have a clock that can provide a reasonable
approximation of the current time, its responses MUST NOT include a Date header
field. In this case, the rules in Section 14.18.1 MUST be followed.
- snip -

I don't see why RFC2518 needs to say anything at all (it's an extension of
HTTP/1.1 after all), but if it does, it should make correct statements about
what HTTP 1.1 actually says.



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> a few questions:
>
> - how many people have been reviewing each of these drafts?

I have been doing my level best to keep up with list traffic, but  
have not performed a complete draft read in some time. I usually  
prefer to do a fewer number of deep readings rather than try to scan  
each minor draft rev.

>
> - can anybody say with confidence what has changed since RFC2518?

Um, isn't this what diff tools are for? If we can't do a reasonable  
diff, then perhaps we should move back to Word. It provides much  
better visibility for fine-grain changes.

>
> - does any server implementor think that (s)he has a compliant  
> implementation of what's in?

Given that we are discussing a small number of minor new features  
(such as force-authenticate), the answer should be none.

>
> The fact that we only have little participation nowadays even makes  
> it more important that those who want to contribute it can do that  
> effectively. Right now, I don't have the impression that the time I  
> have spent in the past years has been effective at all.

My view is quite different. Due to your contributions we have a rich  
set of issues that have been documented, and we have gone some way  
towards resolving a large number of them.

What we need to complete this revision process is active commitment  
from the remaining active working group members. We currently have  
this. We have an active document editor who is producing new drafts  
on a timely basis. We have several WG members actively engaging  
remaining issues, and a commitment to work towards consensus on  
remaining issues.

I know you are frustrated by the fact that text is appearing in the  
drafts between revisions that you don't feel represents WG consensus.  
Reflecting on the drafting of 2518, the design team sometimes shoved  
in lots of stuff between revisions that was never agreed upon by the  
list first. That's why we issued drafts, and then solicited comments  
on them. That's also why we usually had a Word version of the  
document with change tracking turned on, so people could easily see  
all of the changes. Many times people ripped our heads off for the  
problems that were introduced.

My personal view is the use of XML for the draft is part of the  
problem. In order to actually read the draft, I have to download it  
from the editing site, put it in a location where all of the  
stylesheets are present (after finding and downloading them too).  
Then I have to use diff, whose output is tedious to understand, to  
understand the differences between versions. I'm no fan of Word, but  
its change tracking feature and visibility of changes seems like it's  
*exactly* what we need right now. The other advantage of Word is its  
ability to let multiple authors work directly on the specification,  
since you can see exactly what edits have been performed.

Finally, while I know its frustrating to have to monitor changes made  
to the draft, I don't see how this is anything other than an  
essential difficulty of producing a protocol specification. Anyone  
acting document editor is likely to add text into the specification,  
in a good faith effort to resolve an issue, that doesn't meet the  
approval of the rest of the working group. Roy sometimes got beat up  
for changes he made to the HTTP/1.x specifications when he was editor  
(and there were often complaints that he wasn't making drafts fast  
enough). Geoff would often insert large chunks of text into the Delta- 
V specification, and then go to the list to build consensus around  
them. It's not reasonable to expect every text change to be vetted by  
the list first. It also doesn't reflect current IETF practice, even  
in our own community.

What we do seem to have is a change visibility problem. Moving back  
to Word would be a big step in the direction of solving this. If we  
use a reasonable document model, converting back to XML at the end  
shouldn't be too heinous.

- Jim





--Apple-Mail-18--1037636873
Content-Type: text/html;
	charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<HTML><BODY style=3D"word-wrap: break-word; -khtml-nbsp-mode: space; =
-khtml-line-break: after-white-space; "><DIV><BLOCKQUOTE =
type=3D"cite"><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">a few questions:</DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">- how =
many people have been reviewing each of these =
drafts?</DIV></BLOCKQUOTE><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>I have been doing my level =
best to keep up with list traffic, but have not performed a complete =
draft read in some time. I usually prefer to do a fewer number of deep =
readings rather than try to scan each minor draft =
rev.</DIV><BR><BLOCKQUOTE type=3D"cite"><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: =
14px; "><BR></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">- can anybody say with =
confidence what has changed since RFC2518?</DIV></BLOCKQUOTE><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>Um, isn't this what diff =
tools are for? If we can't do a reasonable diff, then perhaps we should =
move back to Word. It provides much better visibility for fine-grain =
changes.</DIV><BR><BLOCKQUOTE type=3D"cite"><DIV style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; =
min-height: 14px; "><BR></DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">- does any =
server implementor think that (s)he has a compliant implementation of =
what's in?</DIV></BLOCKQUOTE><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>Given that we are =
discussing a small number of minor new features (such as =
force-authenticate), the answer should be none.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><BLOCKQUOTE type=3D"cite"><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">The fact =
that we only have little participation nowadays even makes it more =
important that those who want to contribute it can do that effectively. =
Right now, I don't have the impression that the time I have spent in the =
past years has been effective at all.</DIV></BLOCKQUOTE></DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD">My view is quite different. =
Due to your contributions we have a rich set of issues that have been =
documented, and we have gone some way towards resolving a large number =
of them.</FONT></DIV><DIV><FONT class=3D"Apple-style-span" =
color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD">What we need to complete =
this revision process is active commitment from the remaining active =
working group members. We currently have this. We have an active =
document editor who is producing new drafts on a timely basis. We have =
several WG members actively engaging remaining issues, and a commitment =
to work towards consensus on remaining issues.</FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD">I know you are frustrated =
by the fact that text is appearing in the drafts between revisions that =
you don't feel represents WG consensus. Reflecting on the drafting of =
2518, the design team sometimes shoved in lots of stuff between =
revisions that was never agreed upon by the list first. That's why we =
issued drafts, and then solicited comments on them. That's also why we =
usually had a Word version of the document with change tracking turned =
on, so people could easily see all of the changes. Many times people =
ripped our heads off for the problems that were =
introduced.</FONT></DIV><DIV><FONT class=3D"Apple-style-span" =
color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD">My personal view is the use =
of XML for the draft is part of the problem. In order to actually read =
the draft, I have to download it from the editing site, put it in a =
location where all of the stylesheets are present (after finding and =
downloading them too). Then I have to use diff, whose output is tedious =
to understand, to understand the differences between versions. I'm no =
fan of Word, but its change tracking feature and visibility of changes =
seems like it's *exactly* what we need right now. The other advantage of =
Word is its ability to let multiple authors work directly on the =
specification, since you can see exactly what edits have been =
performed.</FONT></DIV><DIV><FONT class=3D"Apple-style-span" =
color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD">Finally, while I know its =
frustrating to have to monitor changes made to the draft, I don't see =
how this is anything other than an essential difficulty of producing a =
protocol specification. Anyone acting document editor is likely to add =
text into the specification, in a good faith effort to resolve an issue, =
that doesn't meet the approval of the rest of the working group. Roy =
sometimes got beat up for changes he made to the HTTP/1.x specifications =
when he was editor (and there were often complaints that he wasn't =
making drafts fast enough). Geoff would often insert large chunks of =
text into the Delta-V specification, and then go to the list to build =
consensus around them. It's not reasonable to expect every text change =
to be vetted by the list first. It also doesn't reflect current IETF =
practice, even in our own community.</FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD">What we do seem to have is =
a change visibility problem. Moving back to Word would be a big step in =
the direction of solving this. If we use a reasonable document model, =
converting back to XML at the end shouldn't be too =
heinous.</FONT></DIV><DIV><FONT class=3D"Apple-style-span" =
color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD">- =
Jim=A0</FONT></DIV><DIV><FONT class=3D"Apple-style-span" =
color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></DIV></BODY></HTML>=

--Apple-Mail-18--1037636873--




From w3c-dist-auth-request@frink.w3.org Wed Oct 19 13:32:10 2005
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Jim Whitehead wrote:
>> - can anybody say with confidence what has changed since RFC2518?
> 
> 
> Um, isn't this what diff tools are for? If we can't do a reasonable 
> diff, then perhaps we should move back to Word. It provides much better 
> visibility for fine-grain changes.

We can get a reasonable diff (now that we have XML version of both), see 
for instance 
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-latest-from-rfc2518.diff.html>. 
  I guess this is the format people should be reviewing.

>> - does any server implementor think that (s)he has a compliant 
>> implementation of what's in?
> 
> 
> Given that we are discussing a small number of minor new features (such 
> as force-authenticate), the answer should be none.

Given the fact that we think we have only a small number of changes, 
shouldn't the answer be: almost all of them? (at least of those reading 
this list?)

>> The fact that we only have little participation nowadays even makes it 
>> more important that those who want to contribute it can do that 
>> effectively. Right now, I don't have the impression that the time I 
>> have spent in the past years has been effective at all.
> 
> 
> My view is quite different. Due to your contributions we have a rich set 
> of issues that have been documented, and we have gone some way towards 
> resolving a large number of them.
> 
> What we need to complete this revision process is active commitment from 
> the remaining active working group members. We currently have this. We 
> have an active document editor who is producing new drafts on a timely 
> basis. We have several WG members actively engaging remaining issues, 
> and a commitment to work towards consensus on remaining issues.
> 
> I know you are frustrated by the fact that text is appearing in the 
> drafts between revisions that you don't feel represents WG consensus. 
> Reflecting on the drafting of 2518, the design team sometimes shoved in 
> lots of stuff between revisions that was never agreed upon by the list 
> first. That's why we issued drafts, and then solicited comments on them. 
> That's also why we usually had a Word version of the document with 
> change tracking turned on, so people could easily see all of the 
> changes. Many times people ripped our heads off for the problems that 
> were introduced.
> 
> My personal view is the use of XML for the draft is part of the problem. 
> In order to actually read the draft, I have to download it from the 
> editing site, put it in a location where all of the stylesheets are 
> present (after finding and downloading them too). Then I have to use 
> diff, whose output is tedious to understand, to understand the 
> differences between versions. I'm no fan of Word, but its change 
> tracking feature and visibility of changes seems like it's *exactly* 
> what we need right now. The other advantage of Word is its ability to 
> let multiple authors work directly on the specification, since you can 
> see exactly what edits have been performed.

Well, sounds like pre-generated HTML with change tracking (hyper-linked 
to an issues list) is a good thing. It's not like it's impossible to get 
that with XML (check the drafts I've been editing, for instance 
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-bind-12.html>).

> Finally, while I know its frustrating to have to monitor changes made to 
> the draft, I don't see how this is anything other than an essential 
> difficulty of producing a protocol specification. Anyone acting document 
> editor is likely to add text into the specification, in a good faith 
> effort to resolve an issue, that doesn't meet the approval of the rest 
> of the working group. Roy sometimes got beat up for changes he made to 
> the HTTP/1.x specifications when he was editor (and there were often 
> complaints that he wasn't making drafts fast enough). Geoff would often 
> insert large chunks of text into the Delta-V specification, and then go 
> to the list to build consensus around them. It's not reasonable to 
> expect every text change to be vetted by the list first. It also doesn't 
> reflect current IETF practice, even in our own community.

That's true, but I bet in these cases the changes were at least reported 
to the list, discussed there, and taken out when there was no consensus. 
I personally prefer drafts that represent the WG consensus at time of 
submission. But as long as the process that's used ensures that the 
result is ok, that's fine with me as well.

Right now we have the situation that feedback to previous drafts usually 
was ignored, thus the long backlog on issues we now have to go through. 
This definitively is frustrating, and please don't blame people when 
they start considering how to invest their time in a more efficient way.

> What we do seem to have is a change visibility problem. Moving back to 
> Word would be a big step in the direction of solving this. If we use a 
> reasonable document model, converting back to XML at the end shouldn't 
> be too heinous.

IMHO, it's definitively not XML which is the problem. In the end, we 
need to provide an ASCII version, and that works *much* better using 
xml2rfc. Last time we produced a draft with Word (RFC3744) it's 
formatting was so bad that we had to go through an additional 
edit/submission cycle to get it right.

Best regards, Julian






From w3c-dist-auth-request@frink.w3.org Wed Oct 19 14:41:05 2005
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> We can get a reasonable diff (now that we have XML version of  
> both), see for instance <http://greenbytes.de/tech/webdav/draft- 
> ietf-webdav-rfc2518bis-latest-from-rfc2518.diff.html>.  I guess  
> this is the format people should be reviewing.

That's very nice! Are you planning on consistently producing this  
page (or is it created automatically)?

Since it's easy to see the differences using this tool, it seems to  
me the concern about seeing changes from draft to daft is reduced. Is  
this true?

>
> Well, sounds like pre-generated HTML with change tracking (hyper- 
> linked to an issues list) is a good thing. It's not like it's  
> impossible to get that with XML (check the drafts I've been  
> editing, for instance <http://greenbytes.de/tech/webdav/draft-ietf- 
> webdav-bind-12.html>).

This also sounds like a plus. Is there some place that documents how  
to do this?
>
> Right now we have the situation that feedback to previous drafts  
> usually was ignored, thus the long backlog on issues we now have to  
> go through. This definitively is frustrating, and please don't  
> blame people when they start considering how to invest their time  
> in a more efficient way.

My feeling is the modification process is now back on track, and we  
have a responsive document editor.

> IMHO, it's definitively not XML which is the problem. In the end,  
> we need to provide an ASCII version, and that works *much* better  
> using xml2rfc. Last time we produced a draft with Word (RFC3744)  
> it's formatting was so bad that we had to go through an additional  
> edit/submission cycle to get it right.
>

I agree that's a pain, and a big advantage of XML. But, if the lack  
of change awareness from draft to draft frustrates people so much we  
never create a final draft, the ability to convert to text isn't  
super important. But, perhaps it's easy to create a cron job that  
automatically creates an HTML diff between revisions of 2518bis?  
Also, automatically converting the latest draft to HTML would also be  
a plus.

Making it easier to see the latest draft might improve participation.

- Jim





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To respond specifically to the question about resolving issues, the 
text was added in an attempt to comprehensively respond to an issue 
that was raised on the mailing list by ChunWei Ho on July 20.  I 
thought that your answer to ChunWei Ho's question was perfectly 
correct, and that info wasn't unambiguously stated in the RFC, so I 
tried to answer that question and also questions about other status 
codes besides 412 appearing in Multi-Status responses (some of them are 
more subtle than whether or not 412 should appear).  I'm not tied to 
any of the specific recommendations I made in that section -- consider 
it straw-man text.  Have you any changes to recommend in it?

Lisa


On Oct 17, 2005, at 2:35 PM, Julian Reschke wrote:

> Cullen Jennings wrote:
>> Do you really think this should be removed from the final RFC? On the 
>> call
>> the other day I though you were going to do some testing and come up 
>> with
>> some modifications for this text?
>
> No, I think this is a misunderstanding. I really feel this text is 
> both misleading, and doesn't resolve any issue I'm aware of.
>
> I'd really like all of us to agree on the approach not to make any 
> changes in the original spec unless we have a well-defined issue, and 
> working group consensus how to resolve it. If it ain't broke, don't 
> fix it.
>
> Best regards, Julian





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Jim quoth:

> What we do seem to have is a change visibility problem. Moving back to 
> Word would be a big step in the direction of solving this. If we use a 
> reasonable document model, converting back to XML at the end shouldn't 
> be too heinous.
>

Having migrated *from* Word in the midst of this process ( I think 
bis-06 was the first draft produced from XML) I am loath to go back.  I 
have a couple ideas to make the process easier however:

  - When I submit a draft I have to generate a text version anyway -- I 
usually save that to the ietf.webdav.org/webdav area as well.  I can 
generate an HTML version too.  It's a bit of a pain to do that for 
every single change I do (the ones that aren't submitted to the 
official internet-drafts repository) but perhaps I can automate that if 
there's demand, and I'll certainly do that whenever we get an official 
draft version bump.

  - I can do XML diffs and save them to the same place.  Again, not 
every week, but every so often.  We'd eventually have a set of diffs 
that constitutes the entire set of changes starting from the oldest XML 
version available -- 07-08diff.txt, 08-09diff.txt and so on.

  - I already maintain a complete list of changes including those made 
before the draft format went from Word to XML.  Each change has draft 
#'s along with it and issue codes so it's got a lot of context for 
understanding specific changes.  If there's anything missing at all 
it's an oversight and can probably be fixed if it's pointed out to me.
http://ietf.webdav.org/webdav/rfc2518bis/RFC2518%20Changes.doc

  - When I write significant new text in the draft, I can also submit it 
to the mailing list -- particularly when it's new sentences or entire 
paragraphs.  I did this with the partial-success text on Oct 11.  I can 
continue to do this as it seems appropriate , on special request, etc.

Lisa
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Jim quoth:


<excerpt><color><param>0000,0000,DDDB</param>What we do seem to have
is a change visibility problem. Moving back to Word would be a big
step in the direction of solving this. If we use a reasonable document
model, converting back to XML at the end shouldn't be too heinous.</color>


</excerpt>

Having migrated *from* Word in the midst of this process ( I think
bis-06 was the first draft produced from XML) I am loath to go back. 
I have a couple ideas to make the process easier however:


 - When I submit a draft I have to generate a text version anyway -- I
usually save that to the ietf.webdav.org/webdav area as well.  I can
generate an HTML version too.  It's a bit of a pain to do that for
every single change I do (the ones that aren't submitted to the
official internet-drafts repository) but perhaps I can automate that
if there's demand, and I'll certainly do that whenever we get an
official draft version bump.


 - I can do XML diffs and save them to the same place.  Again, not
every week, but every so often.  We'd eventually have a set of diffs
that constitutes the entire set of changes starting from the oldest
XML version available -- 07-08diff.txt, 08-09diff.txt and so on.


 - I already maintain a complete list of changes including those made
before the draft format went from Word to XML.  Each change has draft
#'s along with it and issue codes so it's got a lot of context for
understanding specific changes.  If there's anything missing at all
it's an oversight and can probably be fixed if it's pointed out to me.

http://ietf.webdav.org/webdav/rfc2518bis/RFC2518%20Changes.doc


 - When I write significant new text in the draft, I can also submit
it to the mailing list -- particularly when it's new sentences or
entire paragraphs.  I did this with the partial-success text on Oct
11.  I can continue to do this as it seems appropriate , on special
request, etc.


Lisa
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> On the other hand, Lisa has been working for a vendor that sells both 
> servers and clients, so I'd be really interested to hear why it wasn't 
> implemented over there? Maybe it's not that essential after all?
>

We haven't implemented all of WebDAV yet, let alone RFC2518bis, and 
don't claim to have a finished or fully-compliant implementation in 
either client or server yet.  We're working on it!  I highly suspect we 
will implement in client and server because we do support anonymous 
access and it's nice for clients to be able to decide to go from that 
to authenticated access.

While I'm on the topic: our WebDAV client library in progress is 
intended to be high-level and more application-oriented than the 
standard libraries that come with Python.  It's open source, naturally, 
and contributions are welcome.

http://wiki.osafoundation.org/bin/view/Projects/ZanshinProject

Lisa





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Ok, will do.

Lisa

On Oct 18, 2005, at 1:30 PM, Jim Whitehead wrote:

> I agree with Julian's suggested text change ("will never match" 
> instead of "must never match").
>
> - Jim
>
>
> On Oct 18, 2005, at 12:13 AM, Julian Reschke wrote:
>
>>
>> Lisa Dusseault wrote:
>>
>>> What about changing it to a MUST?  That makes it even more clear 
>>> (and  we will get complaints about lower-case 'must' in the text)
>>>
>>
>> Again: this follows by definition (only an IETF document/activity cab 
>> put things into the DAV: namespace, thus a URI using the DAV: scheme 
>> never can identify a valid lock token).
>>
>> Furthermore, keep in mind that RFC2119 explicitly asks for using 
>> capitalized words sparingly.
>>
>> Best regards, Julian
>>
>





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Subject: Re: new WebDAV python library
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>
> While I'm on the topic: our WebDAV client library in progress is  
> intended to be high-level and more application-oriented than the  
> standard libraries that come with Python.  It's open source,  
> naturally, and contributions are welcome.
>
> http://wiki.osafoundation.org/bin/view/Projects/ZanshinProject
>
>

Hey, that's really neat!

- Jim





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Jim Whitehead wrote:
> 
>> We can get a reasonable diff (now that we have XML version of  both), 
>> see for instance <http://greenbytes.de/tech/webdav/draft- 
>> ietf-webdav-rfc2518bis-latest-from-rfc2518.diff.html>.  I guess  this 
>> is the format people should be reviewing.
> 
> 
> That's very nice! Are you planning on consistently producing this  page 
> (or is it created automatically)?

I can do that semi-automatically once the source on ietf.webdav.org 
actually is well-formed (and doesn't need manual fixes anymore before 
running it through an XML parser).

> Since it's easy to see the differences using this tool, it seems to  me 
> the concern about seeing changes from draft to daft is reduced. Is  this 
> true?

The drafts used to use a format where rfcdiff couldn't generate sensible 
diffs (hint: they were generated from Word). Now that readable diffs can 
be produce from both the revision and the original version this is less 
of a concern. I didn't think about generating a diff against rfc2518 
until today, but this makes a lot of sense.


>> Well, sounds like pre-generated HTML with change tracking (hyper- 
>> linked to an issues list) is a good thing. It's not like it's  
>> impossible to get that with XML (check the drafts I've been  editing, 
>> for instance <http://greenbytes.de/tech/webdav/draft-ietf- 
>> webdav-bind-12.html>).
> 
> 
> This also sounds like a plus. Is there some place that documents how  to 
> do this?

It's an extension to xml2rfc that uses extension elements for 
del/ins/replace. If somebody wants to use it I''ll be happy to (finally) 
write down documentation.

>> Right now we have the situation that feedback to previous drafts  
>> usually was ignored, thus the long backlog on issues we now have to  
>> go through. This definitively is frustrating, and please don't  blame 
>> people when they start considering how to invest their time  in a more 
>> efficient way.
> 
> 
> My feeling is the modification process is now back on track, and we  
> have a responsive document editor.
> 
>> IMHO, it's definitively not XML which is the problem. In the end,  we 
>> need to provide an ASCII version, and that works *much* better  using 
>> xml2rfc. Last time we produced a draft with Word (RFC3744)  it's 
>> formatting was so bad that we had to go through an additional  
>> edit/submission cycle to get it right.
>>
> 
> I agree that's a pain, and a big advantage of XML. But, if the lack  of 
> change awareness from draft to draft frustrates people so much we  never 
> create a final draft, the ability to convert to text isn't  super 
> important. But, perhaps it's easy to create a cron job that  
> automatically creates an HTML diff between revisions of 2518bis?  Also, 

Revisions between drafts that have been submitted are online at 
<http://tools.ietf.org/wg/webdav/draft-ietf-webdav-rfc2518bis/>.

> automatically converting the latest draft to HTML would also be  a plus.

Once the source document is fixed that'll be trivial.

> Making it easier to see the latest draft might improve participation.

Yep.




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Subject: Re: Appropriate partial success codes (was Re: Some questions about  WebDAV)
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Lisa Dusseault wrote:
> 
> To respond specifically to the question about resolving issues, the text 
> was added in an attempt to comprehensively respond to an issue that was 
> raised on the mailing list by ChunWei Ho on July 20.  I thought that 
> your answer to ChunWei Ho's question was perfectly correct, and that 
> info wasn't unambiguously stated in the RFC, so I tried to answer that 
> question and also questions about other status codes besides 412 
> appearing in Multi-Status responses (some of them are more subtle than 
> whether or not 412 should appear).  I'm not tied to any of the specific 
> recommendations I made in that section -- consider it straw-man text.  
> Have you any changes to recommend in it?
> 
> Lisa

The question was:

"Hi,

I have another question. When the If header (webDAV's If header)
condition is not met, the request should fail with 412 Precondition
Failed. If the request is one over multiple resource, like PROPFIND,
COPY or MOVE over Depth > 0, should the whole request fail returning
412 Precondition Failed, or fail only for the specific resources
returning 207 MultiStatus with some portions giving a 412 Precondition
Failed.

Thanks again for the help! :)

Regards,
CW"

(see 
<http://lists.w3.org/Archives/Public/w3c-dist-auth/2005JulSep/0070.html>).

I'm not sure how the new text you added helps resolving that, because 
this was about whether to return a 207 or not.

My answer was:

"Hi,

judging from
<http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.9.4.p.4>:

"The If header's purpose is to describe a series of state lists. If the
state of the resource to which the header is applied does not match any
of the specified state lists then the request MUST fail with a 412
(Precondition Failed). If one of the described state lists matches the
state of the resource then the request may succeed."

I would say that the server must return a 412 (so partial
execution/success of the request is not an option)."

(see 
<http://lists.w3.org/Archives/Public/w3c-dist-auth/2005JulSep/0071.html>)

So as far as I can tell the spec is perfectly ok, and there's absolutely 
no reason to add any new text because of this question.

Best regards, Julian




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This is a multipart message in MIME format.
--=_alternative 0011BBBD852570A0_=
Content-Type: text/plain; charset="US-ASCII"

I agree with Julian.

Here's a good example of why if you think you have a paragraph that
addresses some concern, please just email it out and say "how about this 
paragraph to resolve issue XYZ" (ideally, with a URL to the bug or email
message for issue XYZ).  That is far easier to review than to hope Julian
catches the change and brings it to our attention on the mailing list.

Cheers,
Geoff

Julian wrote on 10/19/2005 05:44:11 PM:

> 
> Lisa Dusseault wrote:
> > 
> > To respond specifically to the question about resolving issues, the 
text 
> > was added in an attempt to comprehensively respond to an issue that 
was 
> > raised on the mailing list by ChunWei Ho on July 20.  I thought that 
> > your answer to ChunWei Ho's question was perfectly correct, and that 
> > info wasn't unambiguously stated in the RFC, so I tried to answer that 

> > question and also questions about other status codes besides 412 
> > appearing in Multi-Status responses (some of them are more subtle than 

> > whether or not 412 should appear).  I'm not tied to any of the 
specific 
> > recommendations I made in that section -- consider it straw-man text. 
> > Have you any changes to recommend in it?
> > 
> > Lisa
> 
> The question was:
> 
> "Hi,
> 
> I have another question. When the If header (webDAV's If header)
> condition is not met, the request should fail with 412 Precondition
> Failed. If the request is one over multiple resource, like PROPFIND,
> COPY or MOVE over Depth > 0, should the whole request fail returning
> 412 Precondition Failed, or fail only for the specific resources
> returning 207 MultiStatus with some portions giving a 412 Precondition
> Failed.
> 
> Thanks again for the help! :)
> 
> Regards,
> CW"
> 
> (see 
> 
<http://lists.w3.org/Archives/Public/w3c-dist-auth/2005JulSep/0070.html>).
> 
> I'm not sure how the new text you added helps resolving that, because 
> this was about whether to return a 207 or not.
> 
> My answer was:
> 
> "Hi,
> 
> judging from
> <http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.9.4.p.4>:
> 
> "The If header's purpose is to describe a series of state lists. If the
> state of the resource to which the header is applied does not match any
> of the specified state lists then the request MUST fail with a 412
> (Precondition Failed). If one of the described state lists matches the
> state of the resource then the request may succeed."
> 
> I would say that the server must return a 412 (so partial
> execution/success of the request is not an option)."
> 
> (see 
> 
<http://lists.w3.org/Archives/Public/w3c-dist-auth/2005JulSep/0071.html>)
> 
> So as far as I can tell the spec is perfectly ok, and there's absolutely 

> no reason to add any new text because of this question.
> 
> Best regards, Julian
> 

--=_alternative 0011BBBD852570A0_=
Content-Type: text/html; charset="US-ASCII"


<br><font size=2><tt>I agree with Julian.</tt></font>
<br>
<br><font size=2><tt>Here's a good example of why if you think you have
a paragraph that</tt></font>
<br><font size=2><tt>addresses some concern, please just email it out and
say &quot;how about this </tt></font>
<br><font size=2><tt>paragraph to resolve issue XYZ&quot; (ideally, with
a URL to the bug or email</tt></font>
<br><font size=2><tt>message for issue XYZ). &nbsp;That is far easier to
review than to hope Julian</tt></font>
<br><font size=2><tt>catches the change and brings it to our attention
on the mailing list.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br><font size=2><tt>Julian wrote on 10/19/2005 05:44:11 PM:<br>
<br>
&gt; <br>
&gt; Lisa Dusseault wrote:<br>
&gt; &gt; <br>
&gt; &gt; To respond specifically to the question about resolving issues,
the text <br>
&gt; &gt; was added in an attempt to comprehensively respond to an issue
that was <br>
&gt; &gt; raised on the mailing list by ChunWei Ho on July 20. &nbsp;I
thought that <br>
&gt; &gt; your answer to ChunWei Ho's question was perfectly correct, and
that <br>
&gt; &gt; info wasn't unambiguously stated in the RFC, so I tried to answer
that <br>
&gt; &gt; question and also questions about other status codes besides
412 <br>
&gt; &gt; appearing in Multi-Status responses (some of them are more subtle
than <br>
&gt; &gt; whether or not 412 should appear). &nbsp;I'm not tied to any
of the specific <br>
&gt; &gt; recommendations I made in that section -- consider it straw-man
text. &nbsp;<br>
&gt; &gt; Have you any changes to recommend in it?<br>
&gt; &gt; <br>
&gt; &gt; Lisa<br>
&gt; <br>
&gt; The question was:<br>
&gt; <br>
&gt; &quot;Hi,<br>
&gt; <br>
&gt; I have another question. When the If header (webDAV's If header)<br>
&gt; condition is not met, the request should fail with 412 Precondition<br>
&gt; Failed. If the request is one over multiple resource, like PROPFIND,<br>
&gt; COPY or MOVE over Depth &gt; 0, should the whole request fail returning<br>
&gt; 412 Precondition Failed, or fail only for the specific resources<br>
&gt; returning 207 MultiStatus with some portions giving a 412 Precondition<br>
&gt; Failed.<br>
&gt; <br>
&gt; Thanks again for the help! :)<br>
&gt; <br>
&gt; Regards,<br>
&gt; CW&quot;<br>
&gt; <br>
&gt; (see <br>
&gt; &lt;http://lists.w3.org/Archives/Public/w3c-dist-auth/2005JulSep/0070.html&gt;).<br>
&gt; <br>
&gt; I'm not sure how the new text you added helps resolving that, because
<br>
&gt; this was about whether to return a 207 or not.<br>
&gt; <br>
&gt; My answer was:<br>
&gt; <br>
&gt; &quot;Hi,<br>
&gt; <br>
&gt; judging from<br>
&gt; &lt;http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.9.4.p.4&gt;:<br>
&gt; <br>
&gt; &quot;The If header's purpose is to describe a series of state lists.
If the<br>
&gt; state of the resource to which the header is applied does not match
any<br>
&gt; of the specified state lists then the request MUST fail with a 412<br>
&gt; (Precondition Failed). If one of the described state lists matches
the<br>
&gt; state of the resource then the request may succeed.&quot;<br>
&gt; <br>
&gt; I would say that the server must return a 412 (so partial<br>
&gt; execution/success of the request is not an option).&quot;<br>
&gt; <br>
&gt; (see <br>
&gt; &lt;http://lists.w3.org/Archives/Public/w3c-dist-auth/2005JulSep/0071.html&gt;)<br>
&gt; <br>
&gt; So as far as I can tell the spec is perfectly ok, and there's absolutely
<br>
&gt; no reason to add any new text because of this question.<br>
&gt; <br>
&gt; Best regards, Julian<br>
&gt; <br>
</tt></font>
--=_alternative 0011BBBD852570A0_=--




From w3c-dist-auth-request@frink.w3.org Thu Oct 20 05:31:04 2005
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From: "Lukas Mathis" <lukas.mathis@numcom.com>
To: "'WebDav'" <w3c-dist-auth@w3.org>
Date: Thu, 20 Oct 2005 11:21:23 +0200
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Subject: Problem implementing simple WebDAV Server
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Hi,

I'm trying to implement a simple WebDAV server. So far, I've implemented a
propfind method based on example code found in Lisa Dusseault's book
"WebDAV: Next-Generation Collaborative Web Authoring". The method simply
returns an empty directory. Unfortunately, Trying to access it using
Windows' web folders ("webfolder client") gives an error ("Cannot connect to
the Web server http://10.0.0.70:4444/webdav/. The server could not be
located, or may be too busy to respond. Please check your typing or check to
make sure the Web server is available"). BitKinex, on the other hand,
displays the empty directory just fine.

One possible source of the problem may be that web folders seem to try to
access or create several files with "vti" in their name - outside the
/webdav/ folder. This fails, obviously - the root of my server is a normal
web server, no WebDAV server.

I've tried several fixes to go around bugs in web folders, including
changing what options and headers / and /webdav/ return. On another list,
Julian Reschke gave me some pointers to such bugs in web folders, but I did
not manage to fix my problem. I'm not sure if the problem really lies with
web folders, or if I'm just missing some error in my code which BitKinex
ignores.

Any help would be greatly appreciated.

Here's the exchange between web folders and my simple WebDAV server (running
as a Servet inside /webdav):


Request >>>>>>>>>>>>>>>>>>>>>

PROPFIND /webdav HTTP/1.1
Content-Language: en-us
Accept-Language: de-ch, en-us;q=0.5
Content-Type: text/xml
Translate: f
Depth: 0
Content-Length: 0
User-Agent: Microsoft Data Access Internet Publishing Provider DAV
Host: 10.0.0.70:4444
Connection: Keep-Alive
Cookie: JSESSIONID=B671A9ACFAE14F486E24305FB6927063

Response <<<<<<<<<<<<<<<<<<<<

HTTP/1.1 207 Multi-Status
Server: Apache-Coyote/1.1
Date: Thu, 20 Oct 2005 09:01:56 GMT
Expires: Thu, 20 Oct 2005 09:01:56 GMT
Pragma: no-cache
Cache-Control: no-cache
Content-Type: text/xml;charset=UTF-8
Content-Length: 823

<?xml version="1.0" encoding="utf-8" ?>
   <D:multistatus xmlns:D="DAV:">
     <D:response>
          <D:href>http://10.0.0.70:4444/webdav/</D:href>
          <D:propstat>
               <D:prop>
                    <D:creationdate>2001-05-11T17:33:11Z</D:creationdate>
                    <D:displayname>webdav</D:displayname>
                    <D:getlastmodified>Thu, 16 Aug 2001 23:24:33
GMT</D:getlastmodified>
                    <D:resourcetype/>
                    <D:supportedlock/>
                    <D:lockdiscovery/>
               </D:prop>
               <D:status>HTTP/1.1 200 OK</D:status>
          </D:propstat>
          <D:propstat>
               <D:prop><D:getetag/></D:prop>
               <D:status>HTTP/1.1 404 Not Found</D:status>
          </D:propstat>
     </D:response>
   </D:multistatus>

Request >>>>>>>>>>>>>>>>>>>>>

GET /_vti_inf.html HTTP/1.1
Date: Thu, 20 Oct 2005 09:01:56 GMT
MIME-Version: 1.0
Accept: */*
User-Agent: Mozilla/4.0 (compatible; MS FrontPage 6.0)
Host: 10.0.0.70:4444
Accept: auth/sicily
Content-Length: 0
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: JSESSIONID=B671A9ACFAE14F486E24305FB6927063

Response <<<<<<<<<<<<<<<<<<<<

HTTP/1.1 404 /_vti_inf.html
Server: Apache-Coyote/1.1
Content-Type: text/html;charset=ISO-8859-1
Transfer-Encoding: chunked
Date: Thu, 20 Oct 2005 09:01:56 GMT

851
<html>
<!-- removed html code -->
</html>
0

Request >>>>>>>>>>>>>>>>>>>>>

POST /_vti_bin/shtml.exe/_vti_rpc HTTP/1.1
Date: Thu, 20 Oct 2005 09:01:56 GMT
MIME-Version: 1.0
User-Agent: MSFrontPage/6.0
Host: 10.0.0.70:4444
Accept: auth/sicily
Content-Length: 41
Content-Type: application/x-www-form-urlencoded
X-Vermeer-Content-Type: application/x-www-form-urlencoded
Connection: Keep-Alive
Cache-Control: no-cache

Response <<<<<<<<<<<<<<<<<<<<

HTTP/1.1 404 /_vti_bin/shtml.exe/_vti_rpc
Server: Apache-Coyote/1.1
Content-Type: text/html;charset=ISO-8859-1
Transfer-Encoding: chunked
Date: Thu, 20 Oct 2005 09:01:56 GMT

851
<html>
<!-- removed html code -->
</html>
0

Request >>>>>>>>>>>>>>>>>>>>>

method=server+version%3a6%2e0%2e2%2e5523
GET /_vti_inf.html HTTP/1.1
Date: Thu, 20 Oct 2005 09:01:56 GMT
MIME-Version: 1.0
Accept: */*
User-Agent: Mozilla/4.0 (compatible; MS FrontPage 6.0)
Host: 10.0.0.70:4444
Accept: auth/sicily
Content-Length: 0
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: JSESSIONID=B671A9ACFAE14F486E24305FB6927063

Response <<<<<<<<<<<<<<<<<<<<

HTTP/1.1 404 /_vti_inf.html
Server: Apache-Coyote/1.1
Content-Type: text/html;charset=ISO-8859-1
Transfer-Encoding: chunked
Date: Thu, 20 Oct 2005 09:01:56 GMT

851
<html>
<!-- removed html code -->
</html>
0

Request >>>>>>>>>>>>>>>>>>>>>

POST /_vti_bin/shtml.exe/_vti_rpc HTTP/1.1
Date: Thu, 20 Oct 2005 09:01:56 GMT
MIME-Version: 1.0
User-Agent: MSFrontPage/6.0
Host: 10.0.0.70:4444
Accept: auth/sicily
Content-Length: 41
Content-Type: application/x-www-form-urlencoded
X-Vermeer-Content-Type: application/x-www-form-urlencoded
Connection: Keep-Alive
Cache-Control: no-cache

Response <<<<<<<<<<<<<<<<<<<<

HTTP/1.1 404 /_vti_bin/shtml.exe/_vti_rpc
Server: Apache-Coyote/1.1
Content-Type: text/html;charset=ISO-8859-1
Transfer-Encoding: chunked
Date: Thu, 20 Oct 2005 09:01:56 GMT

851
<html>
<!-- removed html code -->
</html>
0

Request >>>>>>>>>>>>>>>>>>>>>

method=server+version%3a6%2e0%2e2%2e5523
OPTIONS / HTTP/1.1
Translate: f
User-Agent: Microsoft Data Access Internet Publishing Provider Protocol
Discovery
Host: 10.0.0.70:4444
Content-Length: 0
Connection: Keep-Alive
Cookie: JSESSIONID=B671A9ACFAE14F486E24305FB6927063

Response <<<<<<<<<<<<<<<<<<<<

HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Date: Thu, 20 Oct 2005 09:01:56 GMT
Expires: Thu, 20 Oct 2005 09:01:56 GMT
Pragma: no-cache
Cache-Control: no-cache
Allow: OPTIONS, GET, HEAD, POST, DELETE, TRACE, PROPPATCH, COPY, MOVE, LOCK,
UNLOCK, PROPFIND, PUT
DAV: 1,2
Content-Type: text/html;charset=ISO-8859-1
Content-Length: 1






From w3c-dist-auth-request@frink.w3.org Thu Oct 20 06:08:04 2005
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From: Julian Reschke <julian.reschke@gmx.de>
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Lukas Mathis wrote:
> Hi,
> 
> I'm trying to implement a simple WebDAV server. So far, I've implemented a
> propfind method based on example code found in Lisa Dusseault's book
> "WebDAV: Next-Generation Collaborative Web Authoring". The method simply
> returns an empty directory. Unfortunately, Trying to access it using
> Windows' web folders ("webfolder client") gives an error ("Cannot connect to
> the Web server http://10.0.0.70:4444/webdav/. The server could not be
> located, or may be too busy to respond. Please check your typing or check to
> make sure the Web server is available"). BitKinex, on the other hand,
> displays the empty directory just fine.
> 
> One possible source of the problem may be that web folders seem to try to
> access or create several files with "vti" in their name - outside the
> /webdav/ folder. This fails, obviously - the root of my server is a normal
> web server, no WebDAV server.

That's the client trying Frontpage Extensions after it wasn't happy with 
the PROPFIND reply.

> I've tried several fixes to go around bugs in web folders, including
> changing what options and headers / and /webdav/ return. On another list,
> Julian Reschke gave me some pointers to such bugs in web folders, but I did
> not manage to fix my problem. I'm not sure if the problem really lies with
> web folders, or if I'm just missing some error in my code which BitKinex
> ignores.
> 
> Any help would be greatly appreciated.
> 
> Here's the exchange between web folders and my simple WebDAV server (running
> as a Servet inside /webdav):
> 
> 
> Request >>>>>>>>>>>>>>>>>>>>>
> 
> PROPFIND /webdav HTTP/1.1
> Content-Language: en-us
> Accept-Language: de-ch, en-us;q=0.5
> Content-Type: text/xml
> Translate: f
> Depth: 0
> Content-Length: 0
> User-Agent: Microsoft Data Access Internet Publishing Provider DAV
> Host: 10.0.0.70:4444
> Connection: Keep-Alive
> Cookie: JSESSIONID=B671A9ACFAE14F486E24305FB6927063
> 
> Response <<<<<<<<<<<<<<<<<<<<
> 
> HTTP/1.1 207 Multi-Status
> Server: Apache-Coyote/1.1
> Date: Thu, 20 Oct 2005 09:01:56 GMT
> Expires: Thu, 20 Oct 2005 09:01:56 GMT
> Pragma: no-cache
> Cache-Control: no-cache
> Content-Type: text/xml;charset=UTF-8
> Content-Length: 823
> 
> <?xml version="1.0" encoding="utf-8" ?>
>    <D:multistatus xmlns:D="DAV:">
>      <D:response>
>           <D:href>http://10.0.0.70:4444/webdav/</D:href>
>           <D:propstat>
>                <D:prop>
>                     <D:creationdate>2001-05-11T17:33:11Z</D:creationdate>
>                     <D:displayname>webdav</D:displayname>
>                     <D:getlastmodified>Thu, 16 Aug 2001 23:24:33
> GMT</D:getlastmodified>
>                     <D:resourcetype/>

That should be <D:resourcetype><D:collection/></D:resourcetype>, right?

>                     <D:supportedlock/>
>                     <D:lockdiscovery/>
>                </D:prop>
>                <D:status>HTTP/1.1 200 OK</D:status>
>           </D:propstat>
>           <D:propstat>
>                <D:prop><D:getetag/></D:prop>
>                <D:status>HTTP/1.1 404 Not Found</D:status>
>           </D:propstat>
>      </D:response>
>    </D:multistatus>
> 
> Request >>>>>>>>>>>>>>>>>>>>>
> 
> GET /_vti_inf.html HTTP/1.1
> Date: Thu, 20 Oct 2005 09:01:56 GMT
> MIME-Version: 1.0
> Accept: */*
> User-Agent: Mozilla/4.0 (compatible; MS FrontPage 6.0)
> Host: 10.0.0.70:4444
> Accept: auth/sicily
> Content-Length: 0
> Connection: Keep-Alive
> Cache-Control: no-cache
> Cookie: JSESSIONID=B671A9ACFAE14F486E24305FB6927063
> 
> Response <<<<<<<<<<<<<<<<<<<<
> 
> HTTP/1.1 404 /_vti_inf.html
> Server: Apache-Coyote/1.1
> Content-Type: text/html;charset=ISO-8859-1
> Transfer-Encoding: chunked
> Date: Thu, 20 Oct 2005 09:01:56 GMT
> 
> 851
> <html>
> <!-- removed html code -->
> </html>
> 0
> 
> Request >>>>>>>>>>>>>>>>>>>>>
> 
> POST /_vti_bin/shtml.exe/_vti_rpc HTTP/1.1
> Date: Thu, 20 Oct 2005 09:01:56 GMT
> MIME-Version: 1.0
> User-Agent: MSFrontPage/6.0
> Host: 10.0.0.70:4444
> Accept: auth/sicily
> Content-Length: 41
> Content-Type: application/x-www-form-urlencoded
> X-Vermeer-Content-Type: application/x-www-form-urlencoded
> Connection: Keep-Alive
> Cache-Control: no-cache
> 
> Response <<<<<<<<<<<<<<<<<<<<
> 
> HTTP/1.1 404 /_vti_bin/shtml.exe/_vti_rpc
> Server: Apache-Coyote/1.1
> Content-Type: text/html;charset=ISO-8859-1
> Transfer-Encoding: chunked
> Date: Thu, 20 Oct 2005 09:01:56 GMT
> 
> 851
> <html>
> <!-- removed html code -->
> </html>
> 0
> 
> Request >>>>>>>>>>>>>>>>>>>>>
> 
> method=server+version%3a6%2e0%2e2%2e5523
> GET /_vti_inf.html HTTP/1.1
> Date: Thu, 20 Oct 2005 09:01:56 GMT
> MIME-Version: 1.0
> Accept: */*
> User-Agent: Mozilla/4.0 (compatible; MS FrontPage 6.0)
> Host: 10.0.0.70:4444
> Accept: auth/sicily
> Content-Length: 0
> Connection: Keep-Alive
> Cache-Control: no-cache
> Cookie: JSESSIONID=B671A9ACFAE14F486E24305FB6927063
> 
> Response <<<<<<<<<<<<<<<<<<<<
> 
> HTTP/1.1 404 /_vti_inf.html
> Server: Apache-Coyote/1.1
> Content-Type: text/html;charset=ISO-8859-1
> Transfer-Encoding: chunked
> Date: Thu, 20 Oct 2005 09:01:56 GMT
> 
> 851
> <html>
> <!-- removed html code -->
> </html>
> 0
> 
> Request >>>>>>>>>>>>>>>>>>>>>
> 
> POST /_vti_bin/shtml.exe/_vti_rpc HTTP/1.1
> Date: Thu, 20 Oct 2005 09:01:56 GMT
> MIME-Version: 1.0
> User-Agent: MSFrontPage/6.0
> Host: 10.0.0.70:4444
> Accept: auth/sicily
> Content-Length: 41
> Content-Type: application/x-www-form-urlencoded
> X-Vermeer-Content-Type: application/x-www-form-urlencoded
> Connection: Keep-Alive
> Cache-Control: no-cache
> 
> Response <<<<<<<<<<<<<<<<<<<<
> 
> HTTP/1.1 404 /_vti_bin/shtml.exe/_vti_rpc
> Server: Apache-Coyote/1.1
> Content-Type: text/html;charset=ISO-8859-1
> Transfer-Encoding: chunked
> Date: Thu, 20 Oct 2005 09:01:56 GMT
> 
> 851
> <html>
> <!-- removed html code -->
> </html>
> 0
> 
> Request >>>>>>>>>>>>>>>>>>>>>
> 
> method=server+version%3a6%2e0%2e2%2e5523
> OPTIONS / HTTP/1.1
> Translate: f
> User-Agent: Microsoft Data Access Internet Publishing Provider Protocol
> Discovery
> Host: 10.0.0.70:4444
> Content-Length: 0
> Connection: Keep-Alive
> Cookie: JSESSIONID=B671A9ACFAE14F486E24305FB6927063
> 
> Response <<<<<<<<<<<<<<<<<<<<
> 
> HTTP/1.1 200 OK
> Server: Apache-Coyote/1.1
> Date: Thu, 20 Oct 2005 09:01:56 GMT
> Expires: Thu, 20 Oct 2005 09:01:56 GMT
> Pragma: no-cache
> Cache-Control: no-cache
> Allow: OPTIONS, GET, HEAD, POST, DELETE, TRACE, PROPPATCH, COPY, MOVE, LOCK,
> UNLOCK, PROPFIND, PUT
> DAV: 1,2
> Content-Type: text/html;charset=ISO-8859-1
> Content-Length: 1
> 
> 
> 
> 

Best regards, Julian

-- 
<green/>bytes GmbH -- http://www.greenbytes.de -- tel:+492512807760




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Hi,

the draft is now in the RFC Editor's queue for Independant Submissions 
(to be reviewed).

It's progress can be tracked at 
<http://www.rfc-editor.org/queue.html#draft-ietf-webdav-quota>.

Best regards, Julian


Julian Reschke wrote:
> Hi,
> 
> as discussed previously, I have submitted the current version of the 
> WebDAV mount spec as a new draft (HTML version at 
> <http://greenbytes.de/tech/webdav/draft-reschke-webdav-mount-02.html>). 
> Unless any new issues are raised, I'll submit this draft to the RFC 
> Editor for publication as Informational RFC early next week.
> 
> Best regards, Julian
> 
> 
> -------- Original Message --------
> From: Internet-Drafts@ietf.org
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> A New Internet-Draft is available from the on-line Internet-Drafts 
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> 
>     Title        : Mounting WebDAV (Web Distributed Authoring and 
> Versioning) servers
>     Author(s)    : J. Reschke
>     Filename    : draft-reschke-webdav-mount-02.txt
>     Pages        : 16
>     Date        : 2005-10-11
>     
> In current Web browsers, there is no uniform way to specify that a
>    user clicking on a link will be presented with an editable view of a
>    WebDAV server.  For example, it is frequently desirable to be able to
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>    drag and drop interaction with the resources of a WebDAV server.
> 
>    This document specifies a mechanism and a document format that
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>    send "mounting" information to a WebDAV client.  The protocol is
>    designed to work on any platform and with any combination of browser
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>    documents through their MIME type.
> 
> A URL for this Internet-Draft is:
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Cc: WebDav <w3c-dist-auth@w3.org>, Cullen Jennings <fluffy@cisco.com>
From: Lisa Dusseault <lisa@osafoundation.org>
Date: Wed, 19 Oct 2005 15:26:17 -0700
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Well, I suppose there are multiple ways of answering the question.    
Since the question explicitly asked whether the server should fail  
"returning 207 Multi-Status with some portions giving a 412  
Precondition Failed", I still find that saying that 412 can't appear in  
Multi-Status is at least a partial answer to that question.

Another answer would be to say that unmet preconditions MUST cause the  
entire request to fail atomically even if the request involves multiple  
resources.  Do you think we should add that to the draft?

Lisa


On Oct 19, 2005, at 2:44 PM, Julian Reschke wrote:

> Lisa Dusseault wrote:
>> To respond specifically to the question about resolving issues, the  
>> text was added in an attempt to comprehensively respond to an issue  
>> that was raised on the mailing list by ChunWei Ho on July 20.  I  
>> thought that your answer to ChunWei Ho's question was perfectly  
>> correct, and that info wasn't unambiguously stated in the RFC, so I  
>> tried to answer that question and also questions about other status  
>> codes besides 412 appearing in Multi-Status responses (some of them  
>> are more subtle than whether or not 412 should appear).  I'm not tied  
>> to any of the specific recommendations I made in that section --  
>> consider it straw-man text.  Have you any changes to recommend in it?
>> Lisa
>
> The question was:
>
> "Hi,
>
> I have another question. When the If header (webDAV's If header)
> condition is not met, the request should fail with 412 Precondition
> Failed. If the request is one over multiple resource, like PROPFIND,
> COPY or MOVE over Depth > 0, should the whole request fail returning
> 412 Precondition Failed, or fail only for the specific resources
> returning 207 MultiStatus with some portions giving a 412 Precondition
> Failed.
>
> Thanks again for the help! :)
>
> Regards,
> CW"
>
> (see  
> <http://lists.w3.org/Archives/Public/w3c-dist-auth/2005JulSep/ 
> 0070.html>).
>
> I'm not sure how the new text you added helps resolving that, because  
> this was about whether to return a 207 or not.
>
> My answer was:
>
> "Hi,
>
> judging from
> <http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.9.4.p.4>:
>
> "The If header's purpose is to describe a series of state lists. If the
> state of the resource to which the header is applied does not match any
> of the specified state lists then the request MUST fail with a 412
> (Precondition Failed). If one of the described state lists matches the
> state of the resource then the request may succeed."
>
> I would say that the server must return a 412 (so partial
> execution/success of the request is not an option)."
>
> (see  
> <http://lists.w3.org/Archives/Public/w3c-dist-auth/2005JulSep/ 
> 0071.html>)
>
> So as far as I can tell the spec is perfectly ok, and there's  
> absolutely no reason to add any new text because of this question.
>
> Best regards, Julian





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Lisa Dusseault wrote:
> 
> Well, I suppose there are multiple ways of answering the question.    
> Since the question explicitly asked whether the server should fail  
> "returning 207 Multi-Status with some portions giving a 412  
> Precondition Failed", I still find that saying that 412 can't appear in  
> Multi-Status is at least a partial answer to that question.

...but:

1) A statement about 412 in multistatus is very different from adding a 
whole new section saying lots of other things, and

2) from a procedural p.o.v.: somebody asked a question, and there was a 
single answer, and no further discussion. To me, cases like this one are 
a perfect example for no changes of the spec being required. We 
shouldn't change the spec each and every time somebody has a question 
unless there's a consensus that there's actually something wrong with 
the spec. If it ain't broken, don't fix it.

> Another answer would be to say that unmet preconditions MUST cause the  
> entire request to fail atomically even if the request involves multiple  
> resources.  Do you think we should add that to the draft?

After re-reading the thread I actually think that RFC2518 currently 
defines a behaviour for "Depth" that is unlikely to be implemented. So 
what we need to do is to sit down, write test cases and find out what 
current implementations do. *Then*, wen can discuss potential changes. 
But please let's first find out what currently servers do.

Volunteers?

Best regards, Julian




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Cullen Jennings wrote:
> 
> Do I have the summary right that there is only one server we know of that
> preservers namespaces?

has anybody created a test case to use in checking server behavior for 
preserving whitespace and namespaces? if so, i'll use that to give you 
results for cosmo. otherwise i'll whip up something of my own.




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Brian Moseley wrote:
> has anybody created a test case to use in checking server behavior for 
> preserving whitespace and namespaces? if so, i'll use that to give you 
> results for cosmo. otherwise i'll whip up something of my own.

<http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0245.html>

Best regards, Julian




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Julian Reschke wrote:

> <http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0245.html>

ah, no windows here so i'll go ahead and write my own. thanks!




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Hello, I have a question about the mod_dav Apache Module.
I limit a directory per user with the directive "require user", but I
want to limit the simultaneous connections with the same user.
Is there a solution for limit the access user to one IP, not multiples
IP's connected with same user.
I use the mod_dav-1.0.3p0.tgz module.

I hope somebody helps me.
Thanks.




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Just so you know, if you put limits like that on a WebDAV server, it  
won't work with Mac OS X's WebDAV file system which handles multiple  
concurrent requests from multiple file system clients (where a client  
is some process thread). We tried queuing requests on the client and  
handling them one at a time, but that made the file system very non- 
responsive when a request that should be relatively fast (i.e. a  
PROPFIND with a depth of 0) got queued up behind a request that could  
take minutes or hours (i.e. a GET on a large resource).

In the current implementation, the Mac OS X WebDAV file system will  
have at most 5 connections open with the server and will queue file  
system client requests when all of those connections are in use.

- Jim

On Oct 21, 2005, at 5:44 AM, Blowfish wrote:

> Hello, I have a question about the mod_dav Apache Module.
> I limit a directory per user with the directive "require user", but I
> want to limit the simultaneous connections with the same user.
> Is there a solution for limit the access user to one IP, not multiples
> IP's connected with same user.
> I use the mod_dav-1.0.3p0.tgz module.
>
> I hope somebody helps me.
> Thanks.





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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=170

           Summary: no mention of 424 in section 8.3.2
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://http://lists.w3.org/Archives/Public/w3c-dist-
                    auth/2005OctDec/0272.html
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: 08.  HTTP Methods for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: elias@cse.ucsc.edu
         QAContact: w3c-dist-auth@w3.org


As reported by Bernard Desruisseaux:
<http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0272.html>

The response to PROPPATCH in Section "8.3.2  Example - PROPPATCH"
contains a <D:status>HTTP/1.1 424 Failed Dependency</D:status>, but
the status code "424 Failed Dependency" is not listed in Section
"8.3.1  Status Codes for use with 207 (Multi-Status)".

While the list of status codes in Section 8.3.1 is not necessarily
exhaustive, I think the status code 424 should definitely be mentionned.



------- You are receiving this mail because: -------
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I set up a weekly bridge for 9 week for all the folks that want to call in.

Date/Time:        October 26, 2005 at 10:00 AM America/Los_Angeles
Length:        60 minutes
Frequency:        This meeting is scheduled to occur every Wednesday for 9
weeks.
Meeting ID:        251807
Meeting Password:  
Description:        <None>
Phone Numbers:    1-866-MEETME9 (US Toll-free)
            1-650-260-9030 (Local/International)




From pete@concentric.com Fri Oct 21 21:07:37 2005
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___
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Online Pharmaceuticals



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<html>
<body>
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<br>
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___
<br>
Best regards,<br>
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range of credit cards. dgjkjutyr RldRUFRHH1JGVllbRVF1WFdHUhteQFQ=
</body>
</html>


------------3021A8CEE01E469--





From w3c-dist-auth-request@frink.w3.org Sat Oct 22 03:23:17 2005
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Another ignorant questions but ... Do existing servers include Locations
headers. For any generic header X, if servers use it or clients expect it,
then I would hope the spec talked about what needed to be in header X. If no
one uses header X (and sound like you are saying it is hard to imagine
anyone uses since no one knows what it means) then the spec should ignore it
or say not to use it.

On 10/19/05 5:06 AM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> Proposed resolution for
> <http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=12>:
> 
> This is about section 8.1.3, which currently says:
> 
> "8.1.3 Use of Location header in responses
> 
> When the Location header is used in a response, it is used by the server
> to indicate the preferred address for the target resource of the
> request. Whenever the server has a preferred address, it should use that
> address consistently. This means that when a response contains a
> Location header, all the URLs in the response body (e.g. a Multi-Status)
> should be consistent (most importantly, should use the same host and
> port)." 
> (<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.se
> ction.8.1.3>)
> 
> I really have no idea what this is about. HTTP (RFC2616) defines
> "Location" as:
> 
> "14.30 Location
> 
> The Location response-header field is used to redirect the recipient to
> a location other than the Request-URI for completion of the request or
> identification of a new resource. For 201 (Created) responses, the
> Location is that of the new resource which was created by the request.
> For 3xx responses, the location SHOULD indicate the server's preferred
> URI for automatic redirection to the resource. The field value consists
> of a single absolute URI.
> 
> 
>         Location       = "Location" ":" absoluteURI
> 
> An example is:
> 
>         Location: http://www.w3.org/pub/WWW/People.html
> 
>      Note: The Content-Location header field (Section 14.14) differs
> from Location in that the Content-Location identifies the original
> location of the entity enclosed in the request. It is therefore possible
> for a response to contain header fields for both Location and
> Content-Location. Also see Section 13.10 for cache requirements of some
> methods." 
> (<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.14.30>)
> 
> 
> Unless somebody can explain what the connection between URLs in response
> bodies and the "Location" response header is, I'd suggest to get rid of
> this paragraph (patch attached).
> 
> Best regards, Julian
> 
> --- draft-ietf-webdav-rfc2518bis-latest.xml 2005-10-19 12:59:48.000000000
> +0100
> +++ draft-ietf-webdav-rfc2518bis-latest.12.xml 2005-10-19 12:59:34.000000000
> +0100
> @@ -1144,18 +1144,6 @@
>        </t>
>      </section>  
>      
> -    <section title="Use of Location header in responses">
> -      <t>
> -   When the Location header is used in a response, it is used by the
> -   server to indicate the preferred address for the target resource of
> -   the request.  Whenever the server has a preferred address, it should
> -   use that address consistently.  This means that when a response
> -   contains a Location header, all the URLs in the response body (e.g.
> -   a Multi-Status) should be consistent (most importantly, should use
> -   the same host and port).
> -      </t>
> -    </section>
> -    
>      <section title="Required Response Headers: Date">
>        <t>
>     Note that HTTP 1.1 requires the Date header in all responses if 




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Cullen Jennings wrote:
> Another ignorant questions but ... Do existing servers include Locations
> headers. For any generic header X, if servers use it or clients expect it,
> then I would hope the spec talked about what needed to be in header X. If no
> one uses header X (and sound like you are saying it is hard to imagine
> anyone uses since no one knows what it means) then the spec should ignore it
> or say not to use it.

As far as I can tell, returning a "Location" response header with status 
207 is completely meaningless, and I'm not aware of any server doing that.

Best regards, Julian




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To: WebDav WG <w3c-dist-auth@w3.org>
From: Lisa Dusseault <lisa@osafoundation.org>
Date: Sat, 22 Oct 2005 10:07:48 -0700
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Subject: Combined set of issues around lock tokens, examples, schemes
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There are several issues that intersect around lock token requirements 
and examples.

  - Some examples use the "locktoken" scheme which is defined nowhere
  - The examples that use strings like "locktoken:a-lock-token" could be 
converted to "opaquelocktoken:a-lock-token" but then that would be an 
example of an invalid URI according to the rules of the 
"opaquelocktoken" scheme and we generally want to provide "best 
practices" examples (note, however, at the slight expense of 
readability)
  - In the meantime, RFC4122 appeared and makes it unnecessary for 
WebDAV to define how to do a UUID -- and we noticed that it defines a 
scheme as well (urn:uuid:)

What about resolving these by getting rid of the opaquelocktoken 
scheme?  The specification requirements would still make it legal to 
use any legal URI that was unique, so existing servers using 
"opaquelocktoken" would not be made non-compliant by this change.  It 
would simplify the spec by relying more on RFC4122 and defining one 
fewer new scheme and a bit of syntax associated with that scheme.

In summary a recommended (but not the only) form for lock tokens would 
be a UID in RFC4122 format, for example:
   "urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6"

This seemed to make sense to Julian, Jim, Geoff and myself on the call 
today, so if we missed anything, or anybody has objections, please 
raise them.

Lisa





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Trying to fill in a little background here: we've discussed this 
related issues before, from June 22 to 26, 2003 and Oct 9 2003.  I 
think part of what we concluded was that if a resource that is 
mentioned in a PROPFIND response would normally return a Location 
header (if you did a HEAD to that resource alone) we needed to find a 
way to return the same info inside the PROPFIND response. So we 
discussed use of 302/303 and a <DAV:location> element to provide the 
information that would have been in the Location header, all inside the 
207 response.

But a slightly different case: if *all* of the resources had been 
redirected (if the target collection itself or a parent had been 
redirected) then one single Location header for the entire response 
might work for the whole shebang.  Thus, I don't agree that returning 
207 with a Location header is meaningless.  (I have no reason to 
disagree with the assertion that existing implementations probably 
don't do that, though).

It might well be premature optimization, however.  The "dumber" way to 
handle this case -- when the request is to a collection that has been 
moved/redirected -- is simply to return the appropriate 300 level 
response and Location and make the client repeat the request against 
the new URL.  Two roundtrips, but probably not a case worth optimizing 
for, because we'd have to define either how to combine the Location 
header with relative URLs inside the response, or how the Location 
header must be consistent with absolute URLs inside the response.

Is there consensus that the Location header MUST NOT be used with 207?  
(and while we're at it, should we generalize to all status responses 
besides 201 and 301, 302, 303, 305, 307?)

Lisa

On Oct 22, 2005, at 1:26 AM, Julian Reschke wrote:

>
> Cullen Jennings wrote:
>> Another ignorant questions but ... Do existing servers include 
>> Locations
>> headers. For any generic header X, if servers use it or clients 
>> expect it,
>> then I would hope the spec talked about what needed to be in header 
>> X. If no
>> one uses header X (and sound like you are saying it is hard to imagine
>> anyone uses since no one knows what it means) then the spec should 
>> ignore it
>> or say not to use it.
>
> As far as I can tell, returning a "Location" response header with 
> status 207 is completely meaningless, and I'm not aware of any server 
> doing that.
>
> Best regards, Julian
>





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Lisa Dusseault wrote:
> Trying to fill in a little background here: we've discussed this related 
> issues before, from June 22 to 26, 2003 and Oct 9 2003.  I think part of 

For the former time range, I'm not sure what messages you're referring 
to (URL?). For the latter, this was about DAV:location elements in 
DAV:multistatus (see 
<http://lists.w3.org/Archives/Public/w3c-dist-auth/2003OctDec/thread.html#35>).

> what we concluded was that if a resource that is mentioned in a PROPFIND 
> response would normally return a Location header (if you did a HEAD to 
> that resource alone) we needed to find a way to return the same info 
> inside the PROPFIND response. So we discussed use of 302/303 and a 
> <DAV:location> element to provide the information that would have been 
> in the Location header, all inside the 207 response.

That's all true, but what does this have to do with what the spec 
currently says? It talks about some interaction of a "Location" response 
header and a multistatus response body (on the very same message), and I 
really don't get what this has to do with the issue mentioned above.

> But a slightly different case: if *all* of the resources had been 
> redirected (if the target collection itself or a parent had been 
> redirected) then one single Location header for the entire response 

That's a different situation, described in 
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-redirectref-protocol-13.html#redirect.references.to.collections>. 
As a redirect reference resource is not a collection, a PROPFIND on it 
with no Redirect-specific request headers simply would return in a 302 
status, just like GET or HEAD.

> might work for the whole shebang.  Thus, I don't agree that returning 
> 207 with a Location header is meaningless.  (I have no reason to 
> disagree with the assertion that existing implementations probably don't 
> do that, though).

The nature of a redirect resource is that it redirects to a different 
URL, using 3xx and Location header. Applying PROPFIND to a redirect gets 
you a 3xx and a Location header, not a 207 and multistatus.

The REDIRECT spec defines an extension so that you can PROPFIND the 
properties of the redirect, instead of being redirected. That still 
doesn't make a redirect a WebDAV collection.

On the other hand, a WebDAV collection that *contains* redirects will 
respond with 207/multistatus to a PROPFIND.

> It might well be premature optimization, however.  The "dumber" way to 
> handle this case -- when the request is to a collection that has been 
> moved/redirected -- is simply to return the appropriate 300 level 
> response and Location and make the client repeat the request against the 
> new URL.  Two roundtrips, but probably not a case worth optimizing for, 
> because we'd have to define either how to combine the Location header 
> with relative URLs inside the response, or how the Location header must 
> be consistent with absolute URLs inside the response.

This sounds a bit like you want to re-invent redirects altogether. 
Applying an HTTP method to a redirect causes a 3xx with a Location 
header. That's it, unless the client uses specific extensions to request 
different behaviour (one approach is defined in the REDIRECT spec).

> Is there consensus that the Location header MUST NOT be used with 207?  
> (and while we're at it, should we generalize to all status responses 
> besides 201 and 301, 302, 303, 305, 307?)

Lisa, it seems that whatever we discuss, you try to turn this into a 
discussion about even more spec text. RFC2518bis doesn't need to say 
anything about it. Whatever RFC2616 already says and a future WebDAV 
REDIRECT spec will say is sufficient.

Best regards, Julian




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On Oct 22, 2005, at 11:04 AM, Julian Reschke wrote:

>
> Lisa, it seems that whatever we discuss, you try to turn this into a 
> discussion about even more spec text. RFC2518bis doesn't need to say 
> anything about it. Whatever RFC2616 already says and a future WebDAV 
> REDIRECT spec will say is sufficient.

You say that as though it's a bad thing!  Whenever we discuss or 
disagree on the mailing list, I find that's a good case for narrowing 
down what can be done in implementations of RFC2518bis; to reduce 
variety between implementations, improve interoperability and have a 
complete spec that doesn't send people running to the mailing list all 
too often.

We can at least think and talk about the issue -- if we *do* come to 
consensus that Location header is not appropriate in 207 responses (or 
other new response codes defined by WebDAV, or new methods defined by 
WebDAV) then any of that would be good information to add to the spec.  
OTOH if we come to consensus that we shouldn't restrict Location header 
use but leave it undefined on most response types, I hope there's a 
good reason for that which would come out in a discussion.

Lisa





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Lisa Dusseault wrote:
> 
> On Oct 22, 2005, at 11:04 AM, Julian Reschke wrote:
> 
>>
>> Lisa, it seems that whatever we discuss, you try to turn this into a 
>> discussion about even more spec text. RFC2518bis doesn't need to say 
>> anything about it. Whatever RFC2616 already says and a future WebDAV 
>> REDIRECT spec will say is sufficient.
> 
> 
> You say that as though it's a bad thing!  Whenever we discuss or 

Yes, as a matter of fact I think it's a bad thing. We are revising 
RFC2518, which to me means

- fixing bugs (examples, typos)
- removing stuff nobody does implement (such as DAV:propertybehaviour)
- simplify things that were too complex in the first place (lock-null 
resources come to mind)
- removing stuff that's not need today anymore (XML namespace 
explanations, UUID generation instructions...)
- update references
- add stuff that we agree was missing (DAV:lockroot...)

This may not be complete, but it should cover most cases.

Just adding prose without no actual need for it IMHO is a bad idea. Do 
that in FAQs, Blogs, online resources, implementor guides, books, whatever.

> disagree on the mailing list, I find that's a good case for narrowing 
> down what can be done in implementations of RFC2518bis; to reduce 
> variety between implementations, improve interoperability and have a 
> complete spec that doesn't send people running to the mailing list all 
> too often.

"Narrowing down" means a change of the spec. As far as I can tell, there 
is no need to change the spec. If you feel there is a need, please 
explain way (interop problem???).

> We can at least think and talk about the issue -- if we *do* come to 
> consensus that Location header is not appropriate in 207 responses (or 
> other new response codes defined by WebDAV, or new methods defined by 
> WebDAV) then any of that would be good information to add to the spec.

I disagree. RFC2616 defines what the "Location" header is for, and any 
attempt to go further than that without practical reasons IMHO would be 
the wrong thing to do.

> OTOH if we come to consensus that we shouldn't restrict Location header 
> use but leave it undefined on most response types, I hope there's a good 
> reason for that which would come out in a discussion.

We can (and will) discuss whatever is raised here. I just dont't see how 
this discussion helps us in any way revising RFC2518. As a matter of 
fact, it slows us down, because it distracts us from the things that 
*are* on the issues list.

Best regards, Julian









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Lisa Dusseault wrote:
> 
> 
> There are several issues that intersect around lock token requirements 
> and examples.
> 
>  - Some examples use the "locktoken" scheme which is defined nowhere

Correct. The spec shouldn't do that.

>  - The examples that use strings like "locktoken:a-lock-token" could be 
> converted to "opaquelocktoken:a-lock-token" but then that would be an 
> example of an invalid URI according to the rules of the 
> "opaquelocktoken" scheme and we generally want to provide "best 
> practices" examples (note, however, at the slight expense of readability)

Yes.

>  - In the meantime, RFC4122 appeared and makes it unnecessary for WebDAV 
> to define how to do a UUID -- and we noticed that it defines a scheme as 
> well (urn:uuid:)

That's a change that's already in -- draft 07 doesn't specify how to 
generate UUIDs anymore.

Section 6.4 
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.6.4>) 
  says:

--
In order to guarantee uniqueness across all resources for all time a 
server MAY use the Universal Unique Identifier (UUID) [9] mechanism to 
generate a lock token:

urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6

The 'opaquelocktoken' URI scheme extends the UUID mechanism slightly 
while still guaranteeing the lock token to be unique across all 
resources for all time. With the 'opaquelocktoken' scheme, the server 
MAY reuse a UUID with extension characters added. If the server does 
this then the algorithm generating the extensions MUST guarantee that 
the same extension will never be used twice with the associated UUID.

OpaqueLockToken-URI = "opaquelocktoken:" UUID [Extension] ; The UUID 
production is the string representation of a UUID. Note that white space 
(LWS) is not allowed between elements of this production.

Extension = path ; path is defined in section 3.3 of RFC2396 [5]
--

Besides fixing the obvious editorial problems here (ABNF examples and 
spec in the same paragraph), I don't see why we need to take out even more.

> What about resolving these by getting rid of the opaquelocktoken 
> scheme?  The specification requirements would still make it legal to use 
> any legal URI that was unique, so existing servers using 
> "opaquelocktoken" would not be made non-compliant by this change.  It 
> would simplify the spec by relying more on RFC4122 and defining one 
> fewer new scheme and a bit of syntax associated with that scheme.

The "opaquelocktoken" scheme is defined in RFC2518. Existing servers use 
it and are unlikely to stop using it (unless there's a replacement that 
provides exactly the same sematics). If RFC2518bis is going to 
"obsolete" RFC2518, I think it needs to keep the scheme declaration. On 
the other hand, if it doesn't keep it, I'll probably submit that as a 
separate spec.

Again: if it ain't broke don't fix it. I don't see any benefit in 
removing it, but lots of additional work and confusion if we do.

> In summary a recommended (but not the only) form for lock tokens would 
> be a UID in RFC4122 format, for example:
>   "urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6"

It just happens to be a simple URN scheme that fulfills the requirements 
for lock tokens. RFC2518 always allowed different schemes, and we should 
not make the impression that this changed.

> This seemed to make sense to Julian, Jim, Geoff and myself on the call 
> today, so if we missed anything, or anybody has objections, please raise 
> them.

+1 on having valid lock tokens in examples
+1 on using urn:uuid URIs to do that
+1 on simplifying the definition of "opaquelocktoken" by simply 
referring to the UUID generation instructions in RFC4122 (already done 
in draft 07)
-1 on removing the definition of "opaquelocktoken"

Best regards, Julian





From w3c-dist-auth-request@frink.w3.org Sat Oct 22 15:00:19 2005
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Julian Reschke wrote:
> OK,
> 
>> I tried to diff the xml file downloaded from my URL vs. the one from  
>> yours and unfortunately the diff is garbage, showing every line  
>> different.  It's probably something stupid like line returns, but 
>> it's  a pain in the ass figuring out what's actually changed.   If 
>> you  provide a diff I'll check it out further. 
> 
> 
> attached is a patch for the file that was on 
> <http://ietf.webdav.org/webdav/rfc2518bis> as of today.
> 
> Best regards, Julian

Lisa,

any chance you could fix the draft, so that it parses? Once that's done 
I can set up something that generates and publishes the HTML version, 
plus diffs to RFC2518.

Best regards, Julian




From w3c-dist-auth-request@frink.w3.org Sat Oct 22 15:47:27 2005
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Subject: Test cases for "If" header checks
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Hi.

Below is a test script (for Microsoft's XMLHTTPRequest component) that 
tests various forms of "If" headers.

Basically it does some sanity checks first, and then tries the new 
syntax allowing comma-separated lists (or multiple headers).

Of the servers I tested, none supported the new format (not 
surprisingly), but most (*) replied with 400 (bad request). This means 
clients can test that, and there doesn't seem to be any need for a new 
compliance class just for this use case.

Best regards, Julian

(* I notified the maintainers of the other two servers, one of which 
happens to be myself)

--

var req = new ActiveXObject ("MSXML2.ServerXMLHTTP");

if (WScript.Arguments.length == 0) {
   WScript.Echo("Test case If header eval");
   WScript.Echo("Usage: cscript if_fail.js URI {username} {password}");
   WScript.Quit(2);
}

var uri = WScript.Arguments(0);
var user = null;
var pwd = null;

function dumpResponse(r) {
   WScript.Echo(r.status);
   WScript.Echo(r.getAllResponseHeaders());
   WScript.Echo(r.responseText);
}


if (WScript.Arguments.length > 1) {
   user = WScript.Arguments(1);
}

if (WScript.Arguments.length > 2) {
   pwd = WScript.Arguments(2);
}

var x = 1;

function testPut(ifheader, desc) {

   WScript.Echo("\n\n\nTest case " + x + ", If header: " + ifheader);
   WScript.Echo("(" + desc + ")");
   req.open("PUT", uri, false, user, pwd);
   if (ifheader != null) req.setRequestHeader("If", ifheader);
   req.send("test case " + x);
   dumpResponse(req);
   x += 1;
}


// delete content
WScript.Echo("DELETE " + uri);
req.open("DELETE", uri, false, user, pwd);
req.send("foobar");
dumpResponse(req);

testPut(null, "initial content");
if (req.status < 200 || req.status >= 300) {
   WScript.Echo("unexpected status upon PUT");
   WScript.Quit(2);
}

testPut("(<DAV:no-lock>)", "const false");
if (req.status != 412) {
   WScript.Echo("unexpected status upon PUT");
}

testPut("(Not <DAV:no-lock>)", "const true");
if (req.status != 204 && req.status != 200) {
   WScript.Echo("unexpected status upon PUT");
}

testPut("(<DAV:no-lock> Not <DAV:no-lock>)", "const false");
if (req.status != 412) {
   WScript.Echo("unexpected status upon PUT");
}

testPut("(<DAV:no-lock>), (Not <DAV:no-lock>)", "const true using comma 
notation");
if (req.status == 200 || req.status == 204) {
   WScript.Echo("Server seems to understand ',' in If-List as per 
RFC2518bis");
}
else if (req.status == 400) {
   WScript.Echo("Server seems not to understand ',' in If-List as per 
RFC2518bis, rejecting the request with 400");
}
else {
   WScript.Echo("unexpected status upon PUT");
}

testPut("(Not <DAV:no-lock>), (Not <DAV:no-lock>)", "const false using 
comma notation");
if (req.status == 412) {
   WScript.Echo("Server seems to understand ',' in If-List as per 
RFC2518bis");
}
else if (req.status == 400) {
   WScript.Echo("Server seems not to understand ',' in If-List as per 
RFC2518bis, rejecting the request with 400");
}
else {
   WScript.Echo("unexpected status upon PUT");
}





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Hi,

in the meantime (conference call), we found that there was a
misunderstanding between Lisa and myself. When I talked about
"whitespace", I was talking about whitespace in text nodes (between
tags), while she thought I was talking about whitespace inside tags.

To clarify: whitespace inside tags (such as the one between attributes)
is not significant. Nor is attribute order for that matter.

In the conference call, we kind of agreed to delegate terminology to one
of the applicable W3C documents/data models (such as XPath or XML
Infoset). Funny enough, this is exactly what I have proposed long LONG
(!) ago:

<http://lists.w3.org/Archives/Public/w3c-dist-auth/2001AprJun/0102.html>

Best regards, Julian





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OK,

below a proposal to resolve issues 20 
(<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=20>, "Lock 
Token Examples"), 91 
(<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=91>, "chapter 
name for lock token uri schemes"), 102 
(<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=102>, "lock 
tokens in examples") and 99 
(<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=99>, "Risks 
Connected with Lock Tokens").

It does this by

- fixing examples (URI scheme, syntax, whitespace), always using 
syntactically legal urn:uuid URIs

- rewriting section 6.4, getting rid of 6.5 consequently

- fixing the security consideratios, basically re-using the text from 
RFC2518 and just fix what was broken or out-of-date

- move "opaquelocktoken" definition into appendix with minimally 
required spec text


The changes are:


Section 6., para. 16:
OLD:

    This specification provides a lock token URI scheme called
    opaquelocktoken that meets the uniqueness requirements.  However
    resources are free to return any URI scheme so long as it meets the
    uniqueness requirements.  According to current IETF best practices,
    implementations SHOULD use registered URI schemes to ensure
    uniqueness.

NEW:

    A robust method for generating a lock token fulfilling the uniqueness
    requirements is to leverage the "Universally Unique IDentifier"
    (UUID) mechanism.  URI schemes that can use UUIDs are the "UUID" URN
    Namespace defined in [9] and the "opaquelocktoken" URI scheme defined
    in Appendix C.

    However resources are free to return any URI scheme so long as it
    meets the uniqueness requirements.  According to current IETF best
    practices, implementations SHOULD use registered URI schemes to
    ensure uniqueness.


Section 6., para. 19:
OLD:

  6.4  Lock Token URI Schemes

    In order to guarantee uniqueness across all resources for all time a
    server MAY use the Universal Unique  Identifier (UUID) [9] mechanism
    to generate a lock token:

    urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6

    The 'opaquelocktoken' URI scheme extends the UUID mechanism slightly
    while still guaranteeing the lock token to be unique across all
    resources for all time.  With the 'opaquelocktoken' scheme, the
    server MAY reuse a UUID with extension characters added.  If the
    server does this then the algorithm generating the extensions MUST
    guarantee that the same extension will never be used twice with the
    associated UUID.

    OpaqueLockToken-URI = "opaquelocktoken:" UUID [Extension]  ; The UUID
    production is the string representation of a UUID.  Note that white
    space (LWS) is not allowed between elements of this production.

    Extension = path  ; path is defined in section 3.3 of RFC2396 [5]

  6.5  Lock Capability Discovery

NEW:

  6.4  Lock Capability Discovery


Section 7., para. 77:
OLD:

          COPY /~fielding/index.html HTTP/1.1
          Host: www.ics.uci.edu
          Destination: http://www.ics.uci.edu/users/f/fielding/index.html
          If: <http://www.ics.uci.edu/users/f/fielding/index.html>
              (<opaquelocktoken:f81d4fae-7dec-11d0-a765-00a0c91e6bf6>)

NEW:

          COPY /~fielding/index.html HTTP/1.1
          Host: www.ics.uci.edu
          Destination: http://www.ics.uci.edu/users/f/fielding/index.html
          If: <http://www.ics.uci.edu/users/f/fielding/index.html>
              (<urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6>)


Section 8., para. 219:
OLD:

          MOVE /container/ HTTP/1.1
          Host: www.example.com
          Destination: http://www.example.com/othercontainer/
          Overwrite: F
          If: (<opaquelocktoken:fe184f2e-6eec-41d0-c765-01adc56e6bb4>)
              (<opaquelocktoken:e454f3f3-acdc-452a-56c7-00a5c91e4b77>)

NEW:

          MOVE /container/ HTTP/1.1
          Host: www.example.com
          Destination: http://www.example.com/othercontainer/
          Overwrite: F
          If: (<urn:uuid:fe184f2e-6eec-41d0-c765-01adc56e6bb4>)
              (<urn:uuid:e454f3f3-acdc-452a-56c7-00a5c91e4b77>)


Section 8., para. 260:
OLD:

        HTTP/1.1 200 OK
        Lock-Token: <opaquelocktoken:e71d4fae-5dec-22d6-fea5-00a0c91e6be4>
        Content-Type: text/xml; charset="utf-8"
        Content-Length: xxxx

NEW:

        HTTP/1.1 200 OK
        Lock-Token: <urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4>
        Content-Type: text/xml; charset="utf-8"
        Content-Length: xxxx


Section 8., para. 261:
OLD:

        <?xml version="1.0" encoding="utf-8" ?>
        <D:prop xmlns:D="DAV:">
         <D:lockdiscovery>
           <D:activelock>
             <D:locktype><D:write/></D:locktype>
             <D:lockscope><D:exclusive/></D:lockscope>
             <D:depth>infinity</D:depth>
             <D:owner>
               <D:href>
                 http://www.ics.uci.edu/~ejw/contact.html
               </D:href>
             </D:owner>
             <D:timeout>Second-604800</D:timeout>
             <D:locktoken>
               <D:href>opaquelocktoken:e71d4fae-5dec-22d6-fea5-
        00a0c91e6be4</D:href>
             </D:locktoken>
             <D:lockroot>
               <D:href>http://example.com/workspace/webdav
                 /proposal.doc</D:href>
             </D:lockroot>
           </D:activelock>
         </D:lockdiscovery>
        </D:prop>

NEW:

        <?xml version="1.0" encoding="utf-8" ?>
        <D:prop xmlns:D="DAV:">
         <D:lockdiscovery>
           <D:activelock>
             <D:locktype><D:write/></D:locktype>
             <D:lockscope><D:exclusive/></D:lockscope>
             <D:depth>infinity</D:depth>
             <D:owner>
               <D:href>
                 http://www.ics.uci.edu/~ejw/contact.html
               </D:href>
             </D:owner>
             <D:timeout>Second-604800</D:timeout>
             <D:locktoken>
               <D:href
        >urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4</D:href>
             </D:locktoken>
             <D:lockroot>
               <D:href
        >http://example.com/workspace/webdav/proposal.doc</D:href>
             </D:lockroot>
           </D:activelock>
         </D:lockdiscovery>
        </D:prop>


Section 8., para. 263:
OLD:

     Note that the locktoken and lockroot href elements would not contain
     any whitespace.  The line return appearing in this document is only
     for formatting.

  8.11.7  Example - Refreshing a Write Lock

NEW:

  8.11.7  Example - Refreshing a Write Lock


Section 8., para. 265:
OLD:

       LOCK /workspace/webdav/proposal.doc HTTP/1.1
       Host: example.com
       Timeout: Infinite, Second-4100000000
       Lock-Token: <opaquelocktoken:e71d4fae-5dec-22d6-fea5-00a0c91e6be4>
       Authorization: Digest username="ejw",
          realm="ejw@example.com", nonce="...",
          uri="/workspace/webdav/proposal.doc",
          response="...", opaque="..."

NEW:

       LOCK /workspace/webdav/proposal.doc HTTP/1.1
       Host: example.com
       Timeout: Infinite, Second-4100000000
       Lock-Token: <urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4>
       Authorization: Digest username="ejw",
          realm="ejw@example.com", nonce="...",
          uri="/workspace/webdav/proposal.doc",
          response="...", opaque="..."


Section 8., para. 268:
OLD:

        <?xml version="1.0" encoding="utf-8" ?>
        <D:prop xmlns:D="DAV:">
         <D:lockdiscovery>
           <D:activelock>
             <D:locktype><D:write/></D:locktype>
             <D:lockscope><D:exclusive/></D:lockscope>
             <D:depth>infinity</D:depth>
             <D:owner>
               <D:href>
               http://www.ics.uci.edu/~ejw/contact.html
               </D:href>
             </D:owner>
             <D:timeout>Second-604800</D:timeout>
             <D:locktoken>
               <D:href>opaquelocktoken:e71d4fae-5dec-22d6-fea5-
        00a0c91e6be4</D:href>
             </D:locktoken>
             <D:lockroot>
               <D:href>http://example.com/workspace/webdav
                 /proposal.doc</D:href>
             </D:lockroot>
           </D:activelock>
         </D:lockdiscovery>
        </D:prop>

NEW:

        <?xml version="1.0" encoding="utf-8" ?>
        <D:prop xmlns:D="DAV:">
         <D:lockdiscovery>
           <D:activelock>
             <D:locktype><D:write/></D:locktype>
             <D:lockscope><D:exclusive/></D:lockscope>
             <D:depth>infinity</D:depth>
             <D:owner>
               <D:href>
               http://www.ics.uci.edu/~ejw/contact.html
               </D:href>
             </D:owner>
             <D:timeout>Second-604800</D:timeout>
             <D:locktoken>
               <D:href
        >urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4</D:href>
             </D:locktoken>
             <D:lockroot>
               <D:href
        >http://example.com/workspace/webdav /proposal.doc</D:href>
             </D:lockroot>
           </D:activelock>
         </D:lockdiscovery>
        </D:prop>


Section 8., para. 292:
OLD:

        UNLOCK /workspace/webdav/info.doc HTTP/1.1
        Host: example.com
        Lock-Token: <opaquelocktoken:a515cfa4-5da4-22e1-f5b5-00a0451e6bf7>
        Authorization: Digest username="ejw",
           realm="ejw@example.com", nonce="...",
           uri="/workspace/webdav/proposal.doc",
           response="...", opaque="..."

NEW:

        UNLOCK /workspace/webdav/info.doc HTTP/1.1
        Host: example.com
        Lock-Token: <urn:uuid:a515cfa4-5da4-22e1-f5b5-00a0451e6bf7>
        Authorization: Digest username="ejw",
           realm="ejw@example.com", nonce="...",
           uri="/workspace/webdav/proposal.doc",
           response="...", opaque="..."


Section 8., para. 295:
OLD:

     In this example, the lock identified by the lock token
     "opaquelocktoken:a515cfa4-5da4-22e1-f5b5-00a0451e6bf7" is
     successfully removed from the resource
     http://example.com/workspace/webdav/info.doc.  If this lock included
     more than just one resource, the lock is removed from all resources
     included in the lock.  The 204 (No Content) status code is used
     instead of 200 (OK) because there is no response entity body.

NEW:

     In this example, the lock identified by the lock token
     "urn:uuid:a515cfa4-5da4-22e1-f5b5-00a0451e6bf7" is successfully
     removed from the resource
     http://example.com/workspace/webdav/info.doc.  If this lock included
     more than just one resource, the lock is removed from all resources
     included in the lock.  The 204 (No Content) status code is used
     instead of 200 (OK) because there is no response entity body.


Section 9., para. 38:
OLD:

        If: (<opaquelocktoken:a-write-lock-token> ["I am an ETag"]), (["I
        am another ETag"])

NEW:

        If: (<urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC>
             ["I am an ETag"]),
            (["I am another ETag"])


Section 9., para. 39:
OLD:

    The previous header would require that the resource identified in the
    Request-URI be locked with the specified lock token and in the state
    identified by the "I am an ETag" ETag or in the state identified by
    the second ETag "I am another ETag".  To put the matter more plainly
    one can think of the previous If header as being in the form (or (and
    <opaquelocktoken:a-write-lock-token> ["I am an ETag"]) (and ["I am
    another ETag"])).

NEW:

    The previous header would require that the resource identified in the
    Request-URI be locked with the specified lock token and in the state
    identified by the "I am an ETag" ETag or in the state identified by
    the second ETag "I am another ETag".  To put the matter more plainly
    one can think of the previous If header as being in the form (or (and
    <urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC> ["I am an ETag"])
    (and ["I am another ETag"])).


Section 9., para. 44:
OLD:

         COPY /resource1 HTTP/1.1
         Host: www.example.com
         Destination: http://www.example.com/resource2
         If: <http://www.example.com/resource1>
              (<opaquelocktoken:a-write-lock-token> [W/"A weak ETag"]), 
(["strong ETag"]),
             <http://www.bar.bar/random>
              (["another strong ETag"])

NEW:

         COPY /resource1 HTTP/1.1
         Host: www.example.com
         Destination: http://www.example.com/resource2
         If: <http://www.example.com/resource1>
              (<urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC>
               [W/"A weak ETag"]),
              (["strong ETag"]),
             <http://www.bar.bar/random>
              (["another strong ETag"])


Section 9., para. 45:
OLD:

     In this example http://www.example.com/resource1 is being copied to
     http://www.example.com/resource2.  When the method is first applied
     to http://www.example.com/resource1, resource1 must be in the state
     specified by "(<opaquelocktoken:a-write-lock-token> [W/"A weak
     ETag"]) (["strong ETag"])", that is, it either must be locked with a
     lock token of "opaquelocktoken:a-write-lock-token" and have a weak
     entity tag W/"A weak ETag" or it must have a strong entity tag
     "strong ETag".

NEW:

     In this example http://www.example.com/resource1 is being copied to
     http://www.example.com/resource2.  When the method is first applied
     to http://www.example.com/resource1, resource1 must be in the state
     specified by "(<urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC> [W/"A
     weak ETag"]) (["strong ETag"])", that is, it either must be locked
     with a lock token of "urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC"
     and have a weak entity tag W/"A weak ETag" or it must have a strong
     entity tag "strong ETag".


Section 9., para. 49:
OLD:

          If: (Not <opaquelocktoken:write1> <opaquelocktoken:write2>)

NEW:

          If: (Not <urn:uuid:E90CB889-97CA-49b9-AC33-111111111111>
               <urn:uuid:E90CB889-97CA-49b9-AC33-222222222222>)


Section 9., para. 50:
OLD:

    When submitted with a request, this If header requires that all
    operand resources must not be locked with opaquelocktoken:write1 and
    must be locked with opaquelocktoken:write2.

NEW:

    When submitted with a request, this If header requires that all
    operand resources must not be locked with
    urn:uuid:E90CB889-97CA-49b9-AC33-111111111111 and must be locked with
    urn:uuid:E90CB889-97CA-49b9-AC33-222222222222.


Section 9., para. 58:
OLD:

     DELETE /specs/rfc2518.txt HTTP/1.1
     Host: www.example.com
     If: <http://www.example.com/specs/> 
(<opaquelocktoken:a-write-lock-token>)

NEW:

      DELETE /specs/rfc2518.txt HTTP/1.1
      Host: www.example.com
      If: <http://www.example.com/specs/>
          (<urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC>)


Section 13., para. 19:
OLD:

     Description:  The href contains a single lock token URI which refers
        to the lock (i.e., the OpaqueLockToken-URI production in section
        6.4).

NEW:

     Description:  The href contains a single lock token URI which refers
        to the lock.


Section 14., para. 85:
OLD:

          <?xml version="1.0" encoding="utf-8" ?>
          <D:multistatus xmlns:D='DAV:'>
           <D:response>
             <D:href>http://www.example.com/container/</D:href>
             <D:propstat>
               <D:prop>
                 <D:lockdiscovery>
                  <D:activelock>
                   <D:locktype><D:write/></D:locktype>
                   <D:lockscope><D:exclusive/></D:lockscope>
                   <D:depth>0</D:depth>
                   <D:owner>Jane Smith</D:owner>
                   <D:timeout>Infinite</D:timeout>
                   <D:locktoken>
                     <D:href>opaquelocktoken:f81de2ad-7f3d-a1b2-4f3c-
          00a0c91a9d76</D:href>
                   </D:locktoken>
                   <D:lockroot>
                     <D:href>http://www.example.com/container/</D:href>
                   </D:lockroot>
                   </D:activelock>
                 </D:lockdiscovery>
               </D:prop>
               <D:status>HTTP/1.1 200 OK</D:status>
             </D:propstat>
           </D:response>
          </D:multistatus>

NEW:

          <?xml version="1.0" encoding="utf-8" ?>
          <D:multistatus xmlns:D='DAV:'>
           <D:response>
             <D:href>http://www.example.com/container/</D:href>
             <D:propstat>
               <D:prop>
                 <D:lockdiscovery>
                  <D:activelock>
                   <D:locktype><D:write/></D:locktype>
                   <D:lockscope><D:exclusive/></D:lockscope>
                   <D:depth>0</D:depth>
                   <D:owner>Jane Smith</D:owner>
                   <D:timeout>Infinite</D:timeout>
                   <D:locktoken>
                     <D:href
          >urn:uuid:f81de2ad-7f3d-a1b2-4f3c-00a0c91a9d76</D:href>
                   </D:locktoken>
                   <D:lockroot>
                     <D:href>http://www.example.com/container/</D:href>
                   </D:lockroot>
                   </D:activelock>
                 </D:lockdiscovery>
               </D:prop>
               <D:status>HTTP/1.1 200 OK</D:status>
             </D:propstat>
           </D:response>
          </D:multistatus>


Section 19., para. 24:
OLD:

    This specification requires the use of Universal  Unique Identifiers
    (UUIDs) [9] for lock tokens, in order to guarantee their uniqueness
    across space and time.  The security considerations for UUIDs do not
    apply because WebDAV does not assume that lock tokens are supposed to
    be hard to guess or require integrity.  In addition, UUIDs MAY
    contain a IEEE 802 node ID, usually the host address.  Since a WebDAV
    server will issue many locks over its lifetime, the use of node IDs
    might cause the WebDAV server to reveal its IEEE 802 address.
    Several risks are related to this:

NEW:

    This specification recommends the use of Universal Unique Identifiers
    (UUIDs) for lock tokens, in order to guarantee their uniqueness
    across space and time.  UUIDs, as defined in [9], contain a "node"
    field which "consists of the IEEE address, usually the host address.
    For systems with multiple IEEE 802 nodes, any available node address
    can be used."  Since a WebDAV server will issue many locks over its
    lifetime, the implication is that it will also be publicly exposing
    its IEEE 802 address.

    There are several risks associated with exposure of IEEE 802
    addresses.  Using the IEEE 802 address:


Section 19., para. 28:
OLD:

  19.8  Hosting malicious scripts executed on client machines

NEW:

     Section 4.5 of [9] details an alternate mechanism for generating the
     "node" field of a UUID without using an IEEE 802 address, which
     alleviates the risks associated with exposure of IEEE 802 addresses
     by using an alternate source of uniqueness.

  19.8  Hosting malicious scripts executed on client machines


Section 20., para. 4:
OLD:

    This specification also defines a URI scheme for the encoding of lock
    tokens, the opaquelocktoken URI scheme described in section 6.4.

NEW:

    This specification also defines the "opaquelocktoken" URI scheme for
    the encoding of lock tokens (see Appendix C).


NEW:

  Appendix C.  'opaquelocktoken' URI Scheme

    The 'opaquelocktoken' URI scheme defined below uses the Universal
    Unique Identifier (UUID) mechanism ([9], Section 4) to easily
    generate lock tokens fulfilling the uniqueness requirements stated in
    Section 6.3.

      OpaqueLockToken-URI = "opaquelocktoken:" UUID [path]
      ; UUID: see [RFC4122], Section 3.
      ; path: see [RFC3986], Section 3.3.

    Note that the optional "path" postfix allows to generate many lock
    tokens from a single URI, by appending an varying string such as a
    sequence number.

    Example:

      opaquelocktoken:f81de2ad-7f3d-a1b2-4f3c-00a0c91a9d76-0017


--------------030304060004070008090200
Content-Type: text/plain;
 name="20.diff"
Content-Disposition: inline;
 filename="20.diff"
Content-Transfer-Encoding: 7bit

--- draft-ietf-webdav-rfc2518bis-latest.xml	2005-10-21 16:12:09.000000000 +0100
+++ draft-ietf-webdav-rfc2518bis-latest.20.xml	2005-10-23 13:02:21.000000000 +0100
@@ -601,7 +601,7 @@
    </t>
   </section>
   
-  <section title="Lock Tokens">
+  <section title="Lock Tokens" anchor="lock.tokens">
     <t>
    A lock token is a type of state token, represented as a URI, which 
    identifies a particular lock.  A lock token is returned in the Lock-
@@ -619,11 +619,16 @@
    resources and servers without fear of confusion. 
     </t>
     <t>
-   This specification provides a lock token URI scheme called 
-   opaquelocktoken that meets the uniqueness requirements.  However 
-   resources are free to return any URI scheme so long as it meets the 
-   uniqueness requirements.  According to current IETF best practices, implementations
-   SHOULD use registered URI schemes to ensure uniqueness. 
+      A robust method for generating a lock token fulfilling the 
+      uniqueness requirements is to leverage the "Universally Unique IDentifier"
+      (UUID) mechanism.  URI schemes that can use UUIDs are the "UUID" URN
+      Namespace defined in <xref target="RFC4122"/> and the "opaquelocktoken"
+      URI scheme defined in <xref target="opaquelocktoken.uri.scheme"/>.
+    </t>
+    <t>
+     However resources are free to return any URI scheme so long as it meets the 
+     uniqueness requirements.  According to current IETF best practices, implementations
+     SHOULD use registered URI schemes to ensure uniqueness. 
     </t>
     <t>
    Submitting a lock token does not confer full privilege to use
@@ -640,31 +645,6 @@
     </t>
   </section>
   
-  <section title="Lock Token URI Schemes">
-    <t>
-   In order to guarantee uniqueness across all resources for all time 
-   a server MAY use the <xref target="RFC4122">Universal Unique 
-   Identifier (UUID)</xref> mechanism to generate a lock token:
-    </t>
-    <t>urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6</t>
-    <t>The 'opaquelocktoken' URI scheme extends the UUID mechanism slightly 
-      while still guaranteeing the lock token to be unique across all 
-   resources for all time.  With the 'opaquelocktoken' scheme, the server MAY 
-   reuse a UUID with extension characters added.  If the server does this then
-      the algorithm generating the extensions MUST guarantee that the same 
-   extension will never be used twice with the associated UUID. 
-    </t>
-    <t>
-   OpaqueLockToken-URI = "opaquelocktoken:" UUID [Extension]  ; The 
-   UUID production is the string representation of a UUID. Note 
-      that white space (LWS) is not allowed between 
-   elements of this production. 
-    </t>
-    <t>
-   Extension = path  ; path is defined in section 3.3 of <xref target="RFC2396">RFC2396</xref> 
-    </t>
-  </section>
-  
   <section title="Lock Capability Discovery">
     <t>
    Since server lock support is optional, a client trying to lock a 
@@ -1039,7 +1019,7 @@
      Host: www.ics.uci.edu 
      Destination: http://www.ics.uci.edu/users/f/fielding/index.html 
      If: <http://www.ics.uci.edu/users/f/fielding/index.html> 
-         (<opaquelocktoken:f81d4fae-7dec-11d0-a765-00a0c91e6bf6>) 
+         (<urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6>) 
       
     
    >>Response 
@@ -2441,8 +2421,8 @@
      Host: www.example.com 
      Destination: http://www.example.com/othercontainer/ 
      Overwrite: F 
-     If: (<opaquelocktoken:fe184f2e-6eec-41d0-c765-01adc56e6bb4>) 
-         (<opaquelocktoken:e454f3f3-acdc-452a-56c7-00a5c91e4b77>) 
+     If: (<urn:uuid:fe184f2e-6eec-41d0-c765-01adc56e6bb4>) 
+         (<urn:uuid:e454f3f3-acdc-452a-56c7-00a5c91e4b77>) 
       
     
    >>Response 
@@ -2688,7 +2668,7 @@
  >>Response 
   
    HTTP/1.1 200 OK 
-   Lock-Token: <opaquelocktoken:e71d4fae-5dec-22d6-fea5-00a0c91e6be4> 
+   Lock-Token: <urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4> 
    Content-Type: text/xml; charset="utf-8" 
    Content-Length: xxxx 
     
@@ -2706,12 +2686,12 @@
         </D:owner> 
         <D:timeout>Second-604800</D:timeout> 
         <D:locktoken> 
-          <D:href>opaquelocktoken:e71d4fae-5dec-22d6-fea5-
-   00a0c91e6be4</D:href> 
+          <D:href
+   >urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4</D:href> 
         </D:locktoken> 
         <D:lockroot> 
-          <D:href>http://example.com/workspace/webdav 
-            /proposal.doc</D:href> 
+          <D:href
+   >http://example.com/workspace/webdav/proposal.doc</D:href> 
         </D:lockroot> 
       </D:activelock> 
     </D:lockdiscovery> 
@@ -2729,11 +2709,6 @@
    seconds).  Note that the nonce, response, and opaque fields have not 
    been calculated in the Authorization request header. 
           </t>
-          <t>
-   Note that the locktoken and lockroot href elements would not contain 
-   any whitespace.  The line return appearing in this document is only 
-   for formatting. 
-          </t>
     </section>
     
     <section title="Example - Refreshing a Write Lock">
@@ -2744,7 +2719,7 @@
    LOCK /workspace/webdav/proposal.doc HTTP/1.1 
    Host: example.com 
    Timeout: Infinite, Second-4100000000 
-   Lock-Token: <opaquelocktoken:e71d4fae-5dec-22d6-fea5-00a0c91e6be4> 
+   Lock-Token: <urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4> 
    Authorization: Digest username="ejw", 
       realm="ejw@example.com", nonce="...", 
       uri="/workspace/webdav/proposal.doc", 
@@ -2770,12 +2745,12 @@
         </D:owner> 
         <D:timeout>Second-604800</D:timeout> 
         <D:locktoken> 
-          <D:href>opaquelocktoken:e71d4fae-5dec-22d6-fea5-
-   00a0c91e6be4</D:href> 
+          <D:href
+   >urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4</D:href> 
         </D:locktoken> 
         <D:lockroot> 
-          <D:href>http://example.com/workspace/webdav 
-            /proposal.doc</D:href> 
+          <D:href
+   >http://example.com/workspace/webdav /proposal.doc</D:href> 
         </D:lockroot> 
       </D:activelock> 
     </D:lockdiscovery> 
@@ -2919,7 +2894,7 @@
   
    UNLOCK /workspace/webdav/info.doc HTTP/1.1 
    Host: example.com 
-   Lock-Token: <opaquelocktoken:a515cfa4-5da4-22e1-f5b5-00a0451e6bf7> 
+   Lock-Token: <urn:uuid:a515cfa4-5da4-22e1-f5b5-00a0451e6bf7> 
    Authorization: Digest username="ejw", 
       realm="ejw@example.com", nonce="...", 
       uri="/workspace/webdav/proposal.doc", 
@@ -2933,7 +2908,7 @@
       <t>
       
    In this example, the lock identified by the lock token 
-   "opaquelocktoken:a515cfa4-5da4-22e1-f5b5-00a0451e6bf7" is 
+   "urn:uuid:a515cfa4-5da4-22e1-f5b5-00a0451e6bf7" is 
    successfully removed from the resource 
    http://example.com/workspace/webdav/info.doc.  If this lock included 
    more than just one resource, the lock is removed from all resources 
@@ -3118,7 +3093,7 @@
   
   <section title="If Header" anchor="if-header">
     <figure>
-      <artwork>
+      <artwork type="abnf2616">
    If = "If" ":" ( 1*No-tag-list | 1*Tagged-list) 
    No-tag-list = List 
    Tagged-list = Resource 1*List 
@@ -3179,8 +3154,9 @@
       <figure>
         <preamble>Example - no-tag-list production</preamble>
         <artwork><![CDATA[
-   If: (<opaquelocktoken:a-write-lock-token> ["I am an ETag"]), (["I 
-   am another ETag"]) 
+   If: (<urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC>
+        ["I am an ETag"]),
+       (["I am another ETag"]) 
         ]]></artwork>
       </figure>
       <t>
@@ -3189,7 +3165,7 @@
    state identified by the "I am an ETag" ETag or in the state 
    identified by the second ETag "I am another ETag".  To put the 
    matter more plainly one can think of the previous If header as being 
-   in the form (or (and &lt;opaquelocktoken:a-write-lock-token&gt; ["I am an 
+   in the form (or (and &lt;urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC&gt; ["I am an 
    ETag"]) (and ["I am another ETag"])). 
       </t>
     </section>
@@ -3220,7 +3196,9 @@
      Host: www.example.com 
      Destination: http://www.example.com/resource2 
      If: <http://www.example.com/resource1> 
-          (<opaquelocktoken:a-write-lock-token> [W/"A weak ETag"]), (["strong ETag"]), 
+          (<urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC>
+           [W/"A weak ETag"]),
+          (["strong ETag"]), 
          <http://www.bar.bar/random> 
           (["another strong ETag"]) 
     ]]></artwork>
@@ -3229,9 +3207,9 @@
    In this example http://www.example.com/resource1 is being copied to 
    http://www.example.com/resource2.  When the method is first applied 
    to http://www.example.com/resource1, resource1 must be in the state 
-   specified by "(&lt;opaquelocktoken:a-write-lock-token&gt; [W/"A weak ETag"]) 
+   specified by "(&lt;urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC&gt; [W/"A weak ETag"]) 
    (["strong ETag"])", that is, it either must be locked with a lock 
-   token of "opaquelocktoken:a-write-lock-token" and have a weak entity tag 
+   token of "urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC" and have a weak entity tag 
    W/"A weak ETag" or it must have a strong entity tag "strong ETag". 
       </t>
       <t>
@@ -3254,13 +3232,14 @@
      </t>
       <figure>
         <artwork><![CDATA[
-     If: (Not <opaquelocktoken:write1> <opaquelocktoken:write2>) 
+     If: (Not <urn:uuid:E90CB889-97CA-49b9-AC33-111111111111>
+          <urn:uuid:E90CB889-97CA-49b9-AC33-222222222222>) 
         ]]></artwork>
       </figure>
       <t>
    When submitted with a request, this If header requires that all 
-   operand resources must not be locked with opaquelocktoken:write1 and must 
-   be locked with opaquelocktoken:write2. 
+   operand resources must not be locked with urn:uuid:E90CB889-97CA-49b9-AC33-111111111111 and must 
+   be locked with urn:uuid:E90CB889-97CA-49b9-AC33-222222222222. 
       </t>
       <t>
    The Not production is particularly useful with the "&lt;DAV:no-lock&gt;" 
@@ -3294,9 +3273,10 @@
             <figure>
         <preamble>Example - Matching lock tokens with collection locks</preamble>
         <artwork><![CDATA[
- DELETE /specs/rfc2518.txt HTTP/1.1 
- Host: www.example.com 
- If: <http://www.example.com/specs/> (<opaquelocktoken:a-write-lock-token>) 
+  DELETE /specs/rfc2518.txt HTTP/1.1 
+  Host: www.example.com 
+  If: <http://www.example.com/specs/>
+      (<urn:uuid:E90CB889-97CA-49b9-AC33-0C653DF3FDAC>) 
     ]]></artwork>
     <postamble>For this example, the lock token must be compared to the 
         identified resource, which is the 'specs' collection identified by
@@ -3571,9 +3551,7 @@
       be returned unless some other error is returned.  On the other hand,
       if the client did not include a conditional header in the request,
       then the server MUST NOT use this error.
-      
     </t>
-    
   </section>
   
   <section title="414 Request-URI Too Long">
@@ -3740,8 +3718,7 @@
     <t hangText="Namespace: ">DAV:</t> 
     <t hangText="Purpose: ">The lock token associated with a lock. </t>
     <t hangText="Description: ">The href contains a single lock token URI which refers 
-            to the lock (i.e., the OpaqueLockToken-URI production in 
-            section 6.4). </t>
+            to the lock.</t>
    <t hangText="Extensibility: ">MAY be extended with additional child elements or 
             attributes which SHOULD be ignored if not recognized. </t>
     </list>
@@ -4500,8 +4477,8 @@
               <D:owner>Jane Smith</D:owner> 
               <D:timeout>Infinite</D:timeout> 
               <D:locktoken> 
-                <D:href>opaquelocktoken:f81de2ad-7f3d-a1b2-4f3c-
-     00a0c91a9d76</D:href> 
+                <D:href
+     >urn:uuid:f81de2ad-7f3d-a1b2-4f3c-00a0c91a9d76</D:href> 
               </D:locktoken> 
               <D:lockroot> 
                 <D:href>http://www.example.com/container/</D:href> 
@@ -5120,27 +5097,34 @@
   
   <section title="Risks Connected with Lock Tokens">
     <t>
-   This specification requires the use of <xref target="RFC4122">Universal 
-   Unique Identifiers (UUIDs)</xref> for lock tokens, in order to guarantee 
-   their uniqueness across space and time.  The security considerations 
-      for UUIDs do not apply because WebDAV does not assume that lock tokens
-      are supposed to be hard to guess or require integrity.   In addition,
-      UUIDs MAY contain a IEEE 802 node ID, usually the host address.  Since a 
-      WebDAV server will 
-   issue many locks over its lifetime, the use of node IDs might cause the 
-      WebDAV server to reveal its IEEE 802 address. Several risks are related
-      to this:
-    </t>
-    <t><list style="symbols">
-      <t>It is possible to track the movement of hardware from subnet to 
-   subnet.</t> 
-    
-      <t>It may be possible to identify the manufacturer of the hardware 
-   running a WebDAV server. 
+       This specification recommends the use of Universal
+       Unique Identifiers (UUIDs) for lock tokens, in order to guarantee
+       their uniqueness across space and time.  UUIDs, as defined in <xref target="RFC4122" />,
+       contain a "node" field which "consists of the IEEE address,
+       usually the host address.  For systems with multiple IEEE 802 nodes,
+       any available node address can be used."  Since a WebDAV server will
+       issue many locks over its lifetime, the implication is that it will
+       also be publicly exposing its IEEE 802 address.
+    </t>
+    <t>
+       There are several risks associated with exposure of IEEE 802
+       addresses.  Using the IEEE 802 address:
+    </t>
+    <t>
+      <list style="symbols">
+       <t>It is possible to track the movement of hardware from subnet to
+       subnet.</t>
+       <t>It may be possible to identify the manufacturer of the hardware
+       running a WebDAV server.</t>
+       <t>It may be possible to determine the number of each type of computer
+       running WebDAV.</t>
+    </list></t>
+    <t>
+      Section 4.5 of <xref target="RFC4122"/> details an alternate mechanism
+      for generating the "node" field of a UUID without using an IEEE 802
+      address, which alleviates the risks associated with exposure of IEEE
+      802 addresses by using an alternate source of uniqueness.
     </t>
-      <t>It may be possible to determine the number of each type of 
-   computer running WebDAV. </t>
-     </list></t>
   </section>
   
   <section title="Hosting malicious scripts executed on client machines">
@@ -5191,9 +5175,8 @@
    referred to as "DAV:creationdate" for brevity. 
   </t>
   <t>
-   This specification also defines a URI scheme for the encoding of 
-   lock tokens, the opaquelocktoken URI scheme described in section 
-   6.4. 
+   This specification also defines the "opaquelocktoken" URI scheme for the
+   encoding of lock tokens (see <xref target="opaquelocktoken.uri.scheme"/>).
   </t>
   <t>
    To ensure correct interoperation based on this specification, IANA 
@@ -5643,6 +5626,29 @@
   </section>
 </section>
 
+<section title="'opaquelocktoken' URI Scheme" anchor="opaquelocktoken.uri.scheme">
+  <t>
+   The 'opaquelocktoken' URI scheme defined below uses the Universal Unique
+   Identifier (UUID) mechanism (<xref target="RFC4122"/>, Section 4) to
+   easily generate lock tokens fulfilling the uniqueness requirements
+   stated in <xref target="lock.tokens"/>.
+  </t>
+<figure><artwork type="abnf">
+  OpaqueLockToken-URI = "opaquelocktoken:" UUID [path]
+  ; UUID: see [RFC4122], Section 3.
+  ; path: see [RFC3986], Section 3.3.
+</artwork></figure>
+  <t>
+    Note that the optional "path" postfix allows to generate many lock tokens
+    from a single URI, by appending an varying string such as a sequence
+    number.
+  </t>
+<figure><preamble>Example:</preamble><artwork type="abnf">
+  opaquelocktoken:f81de2ad-7f3d-a1b2-4f3c-00a0c91a9d76-0017
+</artwork></figure>
+</section>
+  
+
 </back>
 </rfc>
 

--------------030304060004070008090200--




From w3c-dist-auth-request@frink.w3.org Sun Oct 23 08:44:19 2005
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Date: Sun, 23 Oct 2005 14:43:07 +0200
From: Julian Reschke <julian.reschke@gmx.de>
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Subject: If header list syntax, Re: Test cases for "If" header checks
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Hi,

I think there's an issue with the new If header syntax defined in 
RFC2518bis 
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.9.5>), 
allowing comma separation and consequently multiple instances of "If" 
headers.

In section 4.2, RFC2616 says 
(<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.4.2.p.5>):

"Multiple message-header fields with the same field-name MAY be present 
in a message if and only if the entire field-value for that header field 
is defined as a comma-separated list [i.e., #(values)]."

RFC2518bis currently defines the grammar below:

    If = "If" ":" ( 1*No-tag-list | 1*Tagged-list)
    No-tag-list = List
    Tagged-list = Resource 1*List
    Resource = Coded-URL
    List = #( "(" List | Clause ")" )
    Clause = ["Not"] State-token | State-token
    State-token = Coded-URL  | "[" entity-tag "]"
    Coded-URL = "<" absoluteURI ">"

which clearly is different from what RFC2616 requires.

It may be possible to fix this, but as nobody seems to have implemented 
this yet, we should also think about whether it's really needed:

1) Did we ever *see* an interop problem because of message header 
lengths? Was it ever reported to the mailing list?

2) If there is indeed a problem, is this about the total length of a 
single header, or the length of each individual line? I'm asking because 
it is possible to split a *single* request header across multiple lines 
already.


Looking at 
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.9.5.2>:

If: <http://www.example.com/resource1> (<locktoken:a-write-lock-token>
      [W/"A weak ETag"]), (["strong ETag"]),
      <http://www.bar.bar/random>(["another strong ETag"])

I think what we want is that this is the same thing as:

If: <http://www.example.com/resource1> (<locktoken:a-write-lock-token>
      [W/"A weak ETag"])
If: (["strong ETag"])
If: <http://www.bar.bar/random>(["another strong ETag"])

Which could also be written as:

If: <http://www.example.com/resource1> (<locktoken:a-write-lock-token>
      [W/"A weak ETag"])
     (["strong ETag"])
     <http://www.bar.bar/random>(["another strong ETag"])

today.

Feedback appreciated, Julian





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Subject: [Bug 171] New: If header grammar
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=171

           Summary: If header grammar
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
               URL: http://lists.w3.org/Archives/Public/w3c-dist-
                    auth/2005OctDec/0331.html
        OS/Version: other
            Status: NEW
          Severity: major
          Priority: P2
         Component: 09.  HTTP Headers for Distributed Authoring
        AssignedTo: joe-bugzilla@cursive.net
        ReportedBy: julian.reschke@greenbytes.de
         QAContact: w3c-dist-auth@w3.org


I think there's an issue with the new If header syntax defined in 
RFC2518bis 
(<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-07.html#rfc.section.9.5>),

allowing comma separation and consequently multiple instances of "If" 
headers.

In section 4.2, RFC2616 says 
(<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.4.2.p.5>):

"Multiple message-header fields with the same field-name MAY be present 
in a message if and only if the entire field-value for that header field 
is defined as a comma-separated list [i.e., #(values)]."

RFC2518bis currently defines the grammar below:

    If = "If" ":" ( 1*No-tag-list | 1*Tagged-list)
    No-tag-list = List
    Tagged-list = Resource 1*List
    Resource = Coded-URL
    List = #( "(" List | Clause ")" )
    Clause = ["Not"] State-token | State-token
    State-token = Coded-URL  | "[" entity-tag "]"
    Coded-URL = "<" absoluteURI ">"

which clearly is different from what RFC2616 requires.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=154





------- Additional Comments From julian.reschke@greenbytes.de  2005-10-23 07:38 -------
(wrong link, correct one is
<http://lists.w3.org/Archives/Public/w3c-dist-auth/2002AprJun/0155.html>).





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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=151





------- Additional Comments From julian.reschke@greenbytes.de  2005-10-23 07:40 -------
Work in progress in non-WG draft, see
<http://greenbytes.de/tech/webdav/#draft-reschke-webdav-url-constraints>.




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In-Reply-To: <435A881B.1030008@gmx.de>
To: Julian Reschke <julian.reschke@gmx.de>
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This is a multipart message in MIME format.
--=_alternative 00776956852570A3_=
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I agree with all of Julian's points.

We have a large number of real issues to deal with.

Let's get those taken care of before we waste any more time on debating
whether it improves or damages the specification by adding in arbitrary
amounts of additional "explanatory" text to an already overly long 
specification.

Cheers,
Geoff


Julian wrote on 10/22/2005 02:42:35 PM:
> 
> Lisa Dusseault wrote:
> > 
> > On Oct 22, 2005, at 11:04 AM, Julian Reschke wrote:
> > 
> >>
> >> Lisa, it seems that whatever we discuss, you try to turn this into a 
> >> discussion about even more spec text. RFC2518bis doesn't need to say 
> >> anything about it. Whatever RFC2616 already says and a future WebDAV 
> >> REDIRECT spec will say is sufficient.
> > 
> > 
> > You say that as though it's a bad thing!  Whenever we discuss or 
> 
> Yes, as a matter of fact I think it's a bad thing. We are revising 
> RFC2518, which to me means
> 
> - fixing bugs (examples, typos)
> - removing stuff nobody does implement (such as DAV:propertybehaviour)
> - simplify things that were too complex in the first place (lock-null 
> resources come to mind)
> - removing stuff that's not need today anymore (XML namespace 
> explanations, UUID generation instructions...)
> - update references
> - add stuff that we agree was missing (DAV:lockroot...)
> 
> This may not be complete, but it should cover most cases.
> 
> Just adding prose without no actual need for it IMHO is a bad idea. Do 
> that in FAQs, Blogs, online resources, implementor guides, books, 
whatever.
> 
> > disagree on the mailing list, I find that's a good case for narrowing 
> > down what can be done in implementations of RFC2518bis; to reduce 
> > variety between implementations, improve interoperability and have a 
> > complete spec that doesn't send people running to the mailing list all 

> > too often.
> 
> "Narrowing down" means a change of the spec. As far as I can tell, there 

> is no need to change the spec. If you feel there is a need, please 
> explain way (interop problem???).
> 
> > We can at least think and talk about the issue -- if we *do* come to 
> > consensus that Location header is not appropriate in 207 responses (or 

> > other new response codes defined by WebDAV, or new methods defined by 
> > WebDAV) then any of that would be good information to add to the spec.
> 
> I disagree. RFC2616 defines what the "Location" header is for, and any 
> attempt to go further than that without practical reasons IMHO would be 
> the wrong thing to do.
> 
> > OTOH if we come to consensus that we shouldn't restrict Location 
header 
> > use but leave it undefined on most response types, I hope there's a 
good 
> > reason for that which would come out in a discussion.
> 
> We can (and will) discuss whatever is raised here. I just dont't see how 

> this discussion helps us in any way revising RFC2518. As a matter of 
> fact, it slows us down, because it distracts us from the things that 
> *are* on the issues list.
> 
> Best regards, Julian
> 
> 
> 
> 
> 
> 

--=_alternative 00776956852570A3_=
Content-Type: text/html; charset="US-ASCII"


<br><font size=2><tt>I agree with all of Julian's points.</tt></font>
<br>
<br><font size=2><tt>We have a large number of real issues to deal with.</tt></font>
<br>
<br><font size=2><tt>Let's get those taken care of before we waste any
more time on debating</tt></font>
<br><font size=2><tt>whether it improves or damages the specification by
adding in arbitrary</tt></font>
<br><font size=2><tt>amounts of additional &quot;explanatory&quot; text
to an already overly long specification.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br>
<br><font size=2><tt>Julian wrote on 10/22/2005 02:42:35 PM:<br>
&gt; <br>
&gt; Lisa Dusseault wrote:<br>
&gt; &gt; <br>
&gt; &gt; On Oct 22, 2005, at 11:04 AM, Julian Reschke wrote:<br>
&gt; &gt; <br>
&gt; &gt;&gt;<br>
&gt; &gt;&gt; Lisa, it seems that whatever we discuss, you try to turn
this into a <br>
&gt; &gt;&gt; discussion about even more spec text. RFC2518bis doesn't
need to say <br>
&gt; &gt;&gt; anything about it. Whatever RFC2616 already says and a future
WebDAV <br>
&gt; &gt;&gt; REDIRECT spec will say is sufficient.<br>
&gt; &gt; <br>
&gt; &gt; <br>
&gt; &gt; You say that as though it's a bad thing! &nbsp;Whenever we discuss
or <br>
&gt; <br>
&gt; Yes, as a matter of fact I think it's a bad thing. We are revising
<br>
&gt; RFC2518, which to me means<br>
&gt; <br>
&gt; - fixing bugs (examples, typos)<br>
&gt; - removing stuff nobody does implement (such as DAV:propertybehaviour)<br>
&gt; - simplify things that were too complex in the first place (lock-null
<br>
&gt; resources come to mind)<br>
&gt; - removing stuff that's not need today anymore (XML namespace <br>
&gt; explanations, UUID generation instructions...)<br>
&gt; - update references<br>
&gt; - add stuff that we agree was missing (DAV:lockroot...)<br>
&gt; <br>
&gt; This may not be complete, but it should cover most cases.<br>
&gt; <br>
&gt; Just adding prose without no actual need for it IMHO is a bad idea.
Do <br>
&gt; that in FAQs, Blogs, online resources, implementor guides, books,
whatever.<br>
&gt; <br>
&gt; &gt; disagree on the mailing list, I find that's a good case for narrowing
<br>
&gt; &gt; down what can be done in implementations of RFC2518bis; to reduce
<br>
&gt; &gt; variety between implementations, improve interoperability and
have a <br>
&gt; &gt; complete spec that doesn't send people running to the mailing
list all <br>
&gt; &gt; too often.<br>
&gt; <br>
&gt; &quot;Narrowing down&quot; means a change of the spec. As far as I
can tell, there <br>
&gt; is no need to change the spec. If you feel there is a need, please
<br>
&gt; explain way (interop problem???).<br>
&gt; <br>
&gt; &gt; We can at least think and talk about the issue -- if we *do*
come to <br>
&gt; &gt; consensus that Location header is not appropriate in 207 responses
(or <br>
&gt; &gt; other new response codes defined by WebDAV, or new methods defined
by <br>
&gt; &gt; WebDAV) then any of that would be good information to add to
the spec.<br>
&gt; <br>
&gt; I disagree. RFC2616 defines what the &quot;Location&quot; header is
for, and any <br>
&gt; attempt to go further than that without practical reasons IMHO would
be <br>
&gt; the wrong thing to do.<br>
&gt; <br>
&gt; &gt; OTOH if we come to consensus that we shouldn't restrict Location
header <br>
&gt; &gt; use but leave it undefined on most response types, I hope there's
a good <br>
&gt; &gt; reason for that which would come out in a discussion.<br>
&gt; <br>
&gt; We can (and will) discuss whatever is raised here. I just dont't see
how <br>
&gt; this discussion helps us in any way revising RFC2518. As a matter
of <br>
&gt; fact, it slows us down, because it distracts us from the things that
<br>
&gt; *are* on the issues list.<br>
&gt; <br>
&gt; Best regards, Julian<br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
</tt></font>
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From: Lisa Dusseault <lisa@osafoundation.org>
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To: Julian Reschke <julian.reschke@gmx.de>
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Subject: Re: Combined set of issues around lock tokens, examples, schemes
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On Oct 22, 2005, at 11:53 AM, Julian Reschke wrote:
>>
>
> The "opaquelocktoken" scheme is defined in RFC2518. Existing servers 
> use it and are unlikely to stop using it (unless there's a replacement 
> that provides exactly the same sematics). If RFC2518bis is going to 
> "obsolete" RFC2518, I think it needs to keep the scheme declaration. 
> On the other hand, if it doesn't keep it, I'll probably submit that as 
> a separate spec.
>
> Again: if it ain't broke don't fix it. I don't see any benefit in 
> removing it, but lots of additional work and confusion if we do.
>

Can you elaborate on the work and confusion?   Here's the whole set of 
text that would be removed:

     The 'opaquelocktoken' URI scheme extends the UUID mechanism slightly
       while still guaranteeing the lock token to be unique across all
    resources for all time.  With the 'opaquelocktoken' scheme, the 
server MAY
    reuse a UUID with extension characters added.  If the server does 
this then
       the algorithm generating the extensions MUST guarantee that the 
same
    extension will never be used twice with the associated UUID.

    OpaqueLockToken-URI = "opaquelocktoken:" UUID [Extension]  ; The
    UUID production is the string representation of a UUID. Note
       that white space (LWS) is not allowed between
    elements of this production.

Removing that text doesn't stop server implementors from using 
"opaquelocktoken" or make them non-compliant if they continue to use 
it.  I still recommend removing it now that we have the "urn:uuid:" 
namespace to recommend instead.

Lisa





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Lisa Dusseault wrote:
> 
> 
> On Oct 22, 2005, at 11:53 AM, Julian Reschke wrote:
> 
>>>
>>
>> The "opaquelocktoken" scheme is defined in RFC2518. Existing servers 
>> use it and are unlikely to stop using it (unless there's a replacement 
>> that provides exactly the same sematics). If RFC2518bis is going to 
>> "obsolete" RFC2518, I think it needs to keep the scheme declaration. 
>> On the other hand, if it doesn't keep it, I'll probably submit that as 
>> a separate spec.
>>
>> Again: if it ain't broke don't fix it. I don't see any benefit in 
>> removing it, but lots of additional work and confusion if we do.
>>
> 
> Can you elaborate on the work and confusion?   Here's the whole set of 
> text that would be removed:
> 
>     The 'opaquelocktoken' URI scheme extends the UUID mechanism slightly
>       while still guaranteeing the lock token to be unique across all
>    resources for all time.  With the 'opaquelocktoken' scheme, the 
> server MAY
>    reuse a UUID with extension characters added.  If the server does 
> this then
>       the algorithm generating the extensions MUST guarantee that the same
>    extension will never be used twice with the associated UUID.
> 
>    OpaqueLockToken-URI = "opaquelocktoken:" UUID [Extension]  ; The
>    UUID production is the string representation of a UUID. Note
>       that white space (LWS) is not allowed between
>    elements of this production.
> 
> Removing that text doesn't stop server implementors from using 
> "opaquelocktoken" or make them non-compliant if they continue to use 
> it.  I still recommend removing it now that we have the "urn:uuid:" 
> namespace to recommend instead.

I thought we were working on obsoleting RFC2518. RFC2223 defines what 
this means:

---
Obsoletes

       To be used to refer to an earlier document that is replaced by
       this document.  This document contains either revised information,
       or else all of the same information plus some new information,
       however extensive or brief that new information is; i.e., this
       document can be used alone, without reference to the older
       document.
---

As far as I understand this means that there's a chance that the URI 
scheme "opaquelocktoken" will not be considered a registered URI scheme 
anymore if we remove it. I don't think it's worth that just to save 
something like 15 lines of text in the spec.

So before removing it, I'd prefer that someone gets a statement from 
IANA/IETF what this means for the registration status.

Regarding your question: people will be confused when opaquelocktoken 
isn't registered anymore. Additional work (ie, writing a separate RFC) 
will be required to fix this.

I'd also like to point out that opaquelocktoken has semantics that go 
beyond urn:uuid, so there are many cases where an implementor can't 
simply switch schemes.

So, again:

+1 on recommending urn:uuid
+1 on using it examples
+1 on simplifying the opaquelocktoken definition to rely on RFC4122 but
-1 on removing the scheme declaration

Best regards, Julian




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------=_NextPart_000_0006_D62062BA.BD9097A4--





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This is a multipart message in MIME format.
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Perhaps we could just mention opaquelocktoken in a "deprecated" section.
We can indicate there that "opaquelocktoken" is a registered IANA scheme
defined in 2518 (to remove any concerns about its loss of registration)
but that it has been deprecated in favor of urn:uuid.

This gets opaquelocktoken out of the main body of the text (I'm in favor
of anything we can do do simplify the main body of 2518bis), without
creating any confusion about the registration of the opaquelocktoken 
scheme.

Cheers,
Geoff

Julian wrote on 10/24/2005 03:40:15 AM:
> Lisa Dusseault wrote:
> > On Oct 22, 2005, at 11:53 AM, Julian Reschke wrote:
> > 
> >>>
> >>
> >> The "opaquelocktoken" scheme is defined in RFC2518. Existing servers 
> >> use it and are unlikely to stop using it (unless there's a 
replacement 
> >> that provides exactly the same sematics). If RFC2518bis is going to 
> >> "obsolete" RFC2518, I think it needs to keep the scheme declaration. 
> >> On the other hand, if it doesn't keep it, I'll probably submit that 
as 
> >> a separate spec.
> >>
> >> Again: if it ain't broke don't fix it. I don't see any benefit in 
> >> removing it, but lots of additional work and confusion if we do.
> >>
> > 
> > Can you elaborate on the work and confusion?   Here's the whole set of 

> > text that would be removed:
> > 
> >     The 'opaquelocktoken' URI scheme extends the UUID mechanism 
slightly
> >       while still guaranteeing the lock token to be unique across all
> >    resources for all time.  With the 'opaquelocktoken' scheme, the 
> > server MAY
> >    reuse a UUID with extension characters added.  If the server does 
> > this then
> >       the algorithm generating the extensions MUST guarantee that the 
same
> >    extension will never be used twice with the associated UUID.
> > 
> >    OpaqueLockToken-URI = "opaquelocktoken:" UUID [Extension]  ; The
> >    UUID production is the string representation of a UUID. Note
> >       that white space (LWS) is not allowed between
> >    elements of this production.
> > 
> > Removing that text doesn't stop server implementors from using 
> > "opaquelocktoken" or make them non-compliant if they continue to use 
> > it.  I still recommend removing it now that we have the "urn:uuid:" 
> > namespace to recommend instead.
> 
> I thought we were working on obsoleting RFC2518. RFC2223 defines what 
> this means:
> 
> ---
> Obsoletes
> 
>        To be used to refer to an earlier document that is replaced by
>        this document.  This document contains either revised 
information,
>        or else all of the same information plus some new information,
>        however extensive or brief that new information is; i.e., this
>        document can be used alone, without reference to the older
>        document.
> ---
> 
> As far as I understand this means that there's a chance that the URI 
> scheme "opaquelocktoken" will not be considered a registered URI scheme 
> anymore if we remove it. I don't think it's worth that just to save 
> something like 15 lines of text in the spec.
> 
> So before removing it, I'd prefer that someone gets a statement from 
> IANA/IETF what this means for the registration status.
> 
> Regarding your question: people will be confused when opaquelocktoken 
> isn't registered anymore. Additional work (ie, writing a separate RFC) 
> will be required to fix this.
> 
> I'd also like to point out that opaquelocktoken has semantics that go 
> beyond urn:uuid, so there are many cases where an implementor can't 
> simply switch schemes.
> 
> So, again:
> 
> +1 on recommending urn:uuid
> +1 on using it examples
> +1 on simplifying the opaquelocktoken definition to rely on RFC4122 but
> -1 on removing the scheme declaration
> 
> Best regards, Julian
> 

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<br><font size=2><tt>Perhaps we could just mention opaquelocktoken in a
&quot;deprecated&quot; section.</tt></font>
<br><font size=2><tt>We can indicate there that &quot;opaquelocktoken&quot;
is a registered IANA scheme</tt></font>
<br><font size=2><tt>defined in 2518 (to remove any concerns about its
loss of registration)</tt></font>
<br><font size=2><tt>but that it has been deprecated in favor of urn:uuid.</tt></font>
<br>
<br><font size=2><tt>This gets opaquelocktoken out of the main body of
the text (I'm in favor</tt></font>
<br><font size=2><tt>of anything we can do do simplify the main body of
2518bis), without</tt></font>
<br><font size=2><tt>creating any confusion about the registration of the
opaquelocktoken scheme.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br><font size=2><tt>Julian wrote on 10/24/2005 03:40:15 AM:<br>
&gt; Lisa Dusseault wrote:<br>
&gt; &gt; On Oct 22, 2005, at 11:53 AM, Julian Reschke wrote:<br>
&gt; &gt; <br>
&gt; &gt;&gt;&gt;<br>
&gt; &gt;&gt;<br>
&gt; &gt;&gt; The &quot;opaquelocktoken&quot; scheme is defined in RFC2518.
Existing servers <br>
&gt; &gt;&gt; use it and are unlikely to stop using it (unless there's
a replacement <br>
&gt; &gt;&gt; that provides exactly the same sematics). If RFC2518bis is
going to <br>
&gt; &gt;&gt; &quot;obsolete&quot; RFC2518, I think it needs to keep the
scheme declaration. <br>
&gt; &gt;&gt; On the other hand, if it doesn't keep it, I'll probably submit
that as <br>
&gt; &gt;&gt; a separate spec.<br>
&gt; &gt;&gt;<br>
&gt; &gt;&gt; Again: if it ain't broke don't fix it. I don't see any benefit
in <br>
&gt; &gt;&gt; removing it, but lots of additional work and confusion if
we do.<br>
&gt; &gt;&gt;<br>
&gt; &gt; <br>
&gt; &gt; Can you elaborate on the work and confusion? &nbsp; Here's the
whole set of <br>
&gt; &gt; text that would be removed:<br>
&gt; &gt; <br>
&gt; &gt; &nbsp; &nbsp; The 'opaquelocktoken' URI scheme extends the UUID
mechanism slightly<br>
&gt; &gt; &nbsp; &nbsp; &nbsp; while still guaranteeing the lock token
to be unique across all<br>
&gt; &gt; &nbsp; &nbsp;resources for all time. &nbsp;With the 'opaquelocktoken'
scheme, the <br>
&gt; &gt; server MAY<br>
&gt; &gt; &nbsp; &nbsp;reuse a UUID with extension characters added. &nbsp;If
the server does <br>
&gt; &gt; this then<br>
&gt; &gt; &nbsp; &nbsp; &nbsp; the algorithm generating the extensions
MUST guarantee that the same<br>
&gt; &gt; &nbsp; &nbsp;extension will never be used twice with the associated
UUID.<br>
&gt; &gt; <br>
&gt; &gt; &nbsp; &nbsp;OpaqueLockToken-URI = &quot;opaquelocktoken:&quot;
UUID [Extension] &nbsp;; The<br>
&gt; &gt; &nbsp; &nbsp;UUID production is the string representation of
a UUID. Note<br>
&gt; &gt; &nbsp; &nbsp; &nbsp; that white space (LWS) is not allowed between<br>
&gt; &gt; &nbsp; &nbsp;elements of this production.<br>
&gt; &gt; <br>
&gt; &gt; Removing that text doesn't stop server implementors from using
<br>
&gt; &gt; &quot;opaquelocktoken&quot; or make them non-compliant if they
continue to use <br>
&gt; &gt; it. &nbsp;I still recommend removing it now that we have the
&quot;urn:uuid:&quot; <br>
&gt; &gt; namespace to recommend instead.<br>
&gt; <br>
&gt; I thought we were working on obsoleting RFC2518. RFC2223 defines what
<br>
&gt; this means:<br>
&gt; <br>
&gt; ---<br>
&gt; Obsoletes<br>
&gt; <br>
&gt; &nbsp; &nbsp; &nbsp; &nbsp;To be used to refer to an earlier document
that is replaced by<br>
&gt; &nbsp; &nbsp; &nbsp; &nbsp;this document. &nbsp;This document contains
either revised information,<br>
&gt; &nbsp; &nbsp; &nbsp; &nbsp;or else all of the same information plus
some new information,<br>
&gt; &nbsp; &nbsp; &nbsp; &nbsp;however extensive or brief that new information
is; i.e., this<br>
&gt; &nbsp; &nbsp; &nbsp; &nbsp;document can be used alone, without reference
to the older<br>
&gt; &nbsp; &nbsp; &nbsp; &nbsp;document.<br>
&gt; ---<br>
&gt; <br>
&gt; As far as I understand this means that there's a chance that the URI
<br>
&gt; scheme &quot;opaquelocktoken&quot; will not be considered a registered
URI scheme <br>
&gt; anymore if we remove it. I don't think it's worth that just to save
<br>
&gt; something like 15 lines of text in the spec.<br>
&gt; <br>
&gt; So before removing it, I'd prefer that someone gets a statement from
<br>
&gt; IANA/IETF what this means for the registration status.<br>
&gt; <br>
&gt; Regarding your question: people will be confused when opaquelocktoken
<br>
&gt; isn't registered anymore. Additional work (ie, writing a separate
RFC) <br>
&gt; will be required to fix this.<br>
&gt; <br>
&gt; I'd also like to point out that opaquelocktoken has semantics that
go <br>
&gt; beyond urn:uuid, so there are many cases where an implementor can't
<br>
&gt; simply switch schemes.<br>
&gt; <br>
&gt; So, again:<br>
&gt; <br>
&gt; +1 on recommending urn:uuid<br>
&gt; +1 on using it examples<br>
&gt; +1 on simplifying the opaquelocktoken definition to rely on RFC4122
but<br>
&gt; -1 on removing the scheme declaration<br>
&gt; <br>
&gt; Best regards, Julian<br>
&gt; <br>
</tt></font>
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From: Lisa Dusseault <lisa@osafoundation.org>
Date: Mon, 24 Oct 2005 09:36:06 -0700
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I had assumed that removing opaquelocktoken from RFC2518bis would leave=20=

it registered because it would remain registered in RFC2518.  The BCP=20
on registering schemes=20
(ftp://ftp.rfc-editor.org/in-notes/bcp/bcp35.txt) doesn't say much on=20
obsoleting schemes in STD track documents.    The registration page=20
doesn't show any info about obsoleted or historic schemes=20
(http://www.iana.org/assignments/uri-schemes).  However, it does show=20
several schemes (fax, modem) that were defined in an obsoleted RFC=20
(2806) and not redefined in the new RFC (3966).

Thus I conclude that leaving mention of opaquelocktoken out of=20
RFC2518bis would not lose its registration.  Does that change any=20
opinions?

Lisa

On Oct 24, 2005, at 4:40 AM, Geoffrey M Clemm wrote:

>
> Perhaps we could just mention opaquelocktoken in a "deprecated"=20
> section.
> We can indicate there that "opaquelocktoken" is a registered IANA=20
> scheme
> defined in 2518 (to remove any concerns about its loss of =
registration)
> but that it has been deprecated in favor of urn:uuid.
>
> This gets opaquelocktoken out of the main body of the text (I'm in=20
> favor
> of anything we can do do simplify the main body of 2518bis), without
> creating any confusion about the registration of the opaquelocktoken=20=

> scheme.
>
> Cheers,
> Geoff
>
> Julian wrote on 10/24/2005 03:40:15 AM:
>  > Lisa Dusseault wrote:
>  > > On Oct 22, 2005, at 11:53 AM, Julian Reschke wrote:
>  > >
>  > >>>
>  > >>
>  > >> The "opaquelocktoken" scheme is defined in RFC2518. Existing=20
> servers
>  > >> use it and are unlikely to stop using it (unless there's a=20
> replacement
>  > >> that provides exactly the same sematics). If RFC2518bis is going=20=

> to
>  > >> "obsolete" RFC2518, I think it needs to keep the scheme=20
> declaration.
>  > >> On the other hand, if it doesn't keep it, I'll probably submit=20=

> that as
>  > >> a separate spec.
>  > >>
>  > >> Again: if it ain't broke don't fix it. I don't see any benefit =
in
>  > >> removing it, but lots of additional work and confusion if we do.
>  > >>
>  > > )
>  > > Can you elaborate on the work and confusion? =A0 Here's the whole=20=

> set of
>  > > text that would be removed:
>  > >
>  > > =A0 =A0 The 'opaquelocktoken' URI scheme extends the UUID =
mechanism=20
> slightly
>  > > =A0 =A0 =A0 while still guaranteeing the lock token to be unique =
across=20
> all
>  > > =A0 =A0resources for all time. =A0With the 'opaquelocktoken' =
scheme, the
>  > > server MAY
>  > > =A0 =A0reuse a UUID with extension characters added. =A0If the =
server=20
> does
>  > > this then
>  > > =A0 =A0 =A0 the algorithm generating the extensions MUST =
guarantee that=20
> the same
>  > > =A0 =A0extension will never be used twice with the associated =
UUID.
>  > >
>  > > =A0 =A0OpaqueLockToken-URI =3D "opaquelocktoken:" UUID =
[Extension] =A0;=20
> The
>  > > =A0 =A0UUID production is the string representation of a UUID. =
Note
>  > > =A0 =A0 =A0 that white space (LWS) is not allowed between
>  > > =A0 =A0elements of this production.
>  > >
>  > > Removing that text doesn't stop server implementors from using
>  > > "opaquelocktoken" or make them non-compliant if they continue to=20=

> use
>  > > it. =A0I still recommend removing it now that we have the=20
> "urn:uuid:"
>  > > namespace to recommend instead.
>  >
>  > I thought we were working on obsoleting RFC2518. RFC2223 defines=20
> what
>  > this means:
>  >
>  > ---
>  > Obsoletes
>  >
>  > =A0 =A0 =A0 =A0To be used to refer to an earlier document that is =
replaced=20
> by
>  > =A0 =A0 =A0 =A0this document. =A0This document contains either =
revised=20
> information,
>  > =A0 =A0 =A0 =A0or else all of the same information plus some new=20
> information,
>  > =A0 =A0 =A0 =A0however extensive or brief that new information is; =
i.e.,=20
> this
>  > =A0 =A0 =A0 =A0document can be used alone, without reference to the =
older
>  > =A0 =A0 =A0 =A0document.
>  > ---
>  >
>  > As far as I understand this means that there's a chance that the =
URI
>  > scheme "opaquelocktoken" will not be considered a registered URI=20
> scheme
>  > anymore if we remove it. I don't think it's worth that just to save
>  > something like 15 lines of text in the spec.
>  >
>  > So before removing it, I'd prefer that someone gets a statement =
from
>  > IANA/IETF what this means for the registration status.
>  >
>  > Regarding your question: people will be confused when=20
> opaquelocktoken
>  > isn't registered anymore. Additional work (ie, writing a separate=20=

> RFC)
>  > will be required to fix this.
>  >
>  > I'd also like to point out that opaquelocktoken has semantics that=20=

> go
>  > beyond urn:uuid, so there are many cases where an implementor can't
>  > simply switch schemes.
>  >
>  > So, again:
>  >
>  > +1 on recommending urn:uuid
>  > +1 on using it examples
>  > +1 on simplifying the opaquelocktoken definition to rely on RFC4122=20=

> but
>  > -1 on removing the scheme declaration
>  >
>  > Best regards, Julian
>  >

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I had assumed that removing opaquelocktoken from RFC2518bis would
leave it registered because it would remain registered in RFC2518.=20
The BCP on registering schemes
(ftp://ftp.rfc-editor.org/in-notes/bcp/bcp35.txt) doesn't say much on
obsoleting schemes in STD track documents.    The registration page
doesn't show any info about obsoleted or historic schemes
(http://www.iana.org/assignments/uri-schemes).  However, it does show
several schemes (fax, modem) that were defined in an obsoleted RFC
(2806) and not redefined in the new RFC (3966). =20


Thus I conclude that leaving mention of opaquelocktoken out of
RFC2518bis would not lose its registration.  Does that change any
opinions?


Lisa


On Oct 24, 2005, at 4:40 AM, Geoffrey M Clemm wrote:


<excerpt>

<fixed><x-tad-smaller>Perhaps we could just mention opaquelocktoken in
a "deprecated" section.</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>We can indicate there that "opaquelocktoken" is
a registered IANA scheme</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>defined in 2518 (to remove any concerns about
its loss of registration)</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>but that it has been deprecated in favor of
urn:uuid.</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>This gets opaquelocktoken out of the main body
of the text (I'm in favor</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>of anything we can do do simplify the main body
of 2518bis), without</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>creating any confusion about the registration of
the opaquelocktoken scheme.</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>Cheers,</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>Geoff</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>Julian wrote on 10/24/2005 03:40:15 =
AM:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Lisa Dusseault wrote:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > On Oct 22, 2005, at 11:53 AM, Julian
Reschke wrote:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >>></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> The "opaquelocktoken" scheme is defined in
RFC2518. Existing servers </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> use it and are unlikely to stop using it
(unless there's a replacement</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> that provides exactly the same sematics).
If RFC2518bis is going to</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> "obsolete" RFC2518, I think it needs to
keep the scheme declaration.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> On the other hand, if it doesn't keep it,
I'll probably submit that as </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> a separate spec.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> Again: if it ain't broke don't fix it. I
don't see any benefit in </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >> removing it, but lots of additional work
and confusion if we do.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > >></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > </x-tad-smaller><x-tad-smaller>) =
</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > Can you elaborate on the work and
confusion? =A0 Here's the whole set of </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > text that would be =
removed:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0 The 'opaquelocktoken' URI scheme
extends the UUID mechanism slightly</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0 =A0 while still guaranteeing the lock
token to be unique across all</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0resources for all time. =A0With the
'opaquelocktoken' scheme, the</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > server MAY</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0reuse a UUID with extension characters
added. =A0If the server does </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > this then</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0 =A0 the algorithm generating the
extensions MUST guarantee that the same</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0extension will never be used twice =
with
the associated UUID.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0OpaqueLockToken-URI =3D =
"opaquelocktoken:"
UUID [Extension] =A0; The</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0UUID production is the string
representation of a UUID. Note</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0 =A0 that white space (LWS) is not =
allowed
between</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > =A0 =A0elements of this =
production.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > Removing that text doesn't stop server
implementors from using </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > "opaquelocktoken" or make them
non-compliant if they continue to use </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > it. =A0I still recommend removing it now that
we have the "urn:uuid:"</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > namespace to recommend =
instead.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > I thought we were working on obsoleting
RFC2518. RFC2223 defines what </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > this means:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ---</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Obsoletes</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > =A0 =A0 =A0 =A0To be used to refer to an =
earlier
document that is replaced by</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > =A0 =A0 =A0 =A0this document. =A0This document =
contains
either revised information,</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > =A0 =A0 =A0 =A0or else all of the same =
information
plus some new information,</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > =A0 =A0 =A0 =A0however extensive or brief that =
new
information is; i.e., this</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > =A0 =A0 =A0 =A0document can be used alone, =
without
reference to the older</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > =A0 =A0 =A0 =A0document.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ---</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > As far as I understand this means that
there's a chance that the URI </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > scheme "opaquelocktoken" will not be
considered a registered URI scheme </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > anymore if we remove it. I don't think it's
worth that just to save </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > something like 15 lines of text in the =
spec.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > So before removing it, I'd prefer that
someone gets a statement from </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > IANA/IETF what this means for the
registration status.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Regarding your question: people will be
confused when opaquelocktoken</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > isn't registered anymore. Additional work
(ie, writing a separate RFC) </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > will be required to fix =
this.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > I'd also like to point out that
opaquelocktoken has semantics that go </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > beyond urn:uuid, so there are many cases
where an implementor can't </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > simply switch schemes.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > So, again:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > +1 on recommending =
urn:uuid</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > +1 on using it examples</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > +1 on simplifying the opaquelocktoken
definition to rely on RFC4122 but</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > -1 on removing the scheme =
declaration</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Best regards, Julian</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

</excerpt>=

--Apple-Mail-1--606772818--





From w3c-dist-auth-request@frink.w3.org Mon Oct 24 12:56:36 2005
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Lisa Dusseault wrote:
> I had assumed that removing opaquelocktoken from RFC2518bis would leave 
> it registered because it would remain registered in RFC2518. The BCP on 
> registering schemes (ftp://ftp.rfc-editor.org/in-notes/bcp/bcp35.txt) 
> doesn't say much on obsoleting schemes in STD track documents. The 
> registration page doesn't show any info about obsoleted or historic 
> schemes (http://www.iana.org/assignments/uri-schemes). However, it does 
> show several schemes (fax, modem) that were defined in an obsoleted RFC 
> (2806) and not redefined in the new RFC (3966).
> 
> Thus I conclude that leaving mention of opaquelocktoken out of 
> RFC2518bis would not lose its registration. Does that change any opinions?

Not yet. It may mean that I'm wrong, but it can also mean that IANA just 
forgot (did anybody tell them). Thus, those who want to take it out 
should please make sure that this doesn't have the effect of 
unregistering the scheme, for instance by asking the AD.

Best regards, Julian






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Subject: [Bug 172] New: Whether to obsolete 'opaquelocktoken', keep it, or remove it
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=172

           Summary: Whether to obsolete 'opaquelocktoken', keep it, or
                    remove it
           Product: WebDAV-RFC2518-bis
           Version: -07
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Other
        AssignedTo: lisa@osafoundation.org
        ReportedBy: lisa@osafoundation.org
         QAContact: w3c-dist-auth@w3.org


Now that the UUID RFC defines 'urn:uuid:' we don't need a separate scheme to use
for unique lock tokens.  I've sent mail to IANA so they can clarify what would
happen in their registry if we removed mention of 'opaquelocktoken' in
RFC2518bis or whether we can obsolete it.



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Ok, I've fixed all the non-ASCII characters I was aware of.  I haven't 
found a very good way to ensure those don't sneak in again but I'm sure 
you'll alert me if they do.

Lisa

On Oct 22, 2005, at 11:59 AM, Julian Reschke wrote:

> Julian Reschke wrote:
>> OK,
>>> I tried to diff the xml file downloaded from my URL vs. the one from 
>>>  yours and unfortunately the diff is garbage, showing every line  
>>> different.  It's probably something stupid like line returns, but 
>>> it's  a pain in the ass figuring out what's actually changed.   If 
>>> you  provide a diff I'll check it out further.
>> attached is a patch for the file that was on 
>> <http://ietf.webdav.org/webdav/rfc2518bis> as of today.
>> Best regards, Julian
>
> Lisa,
>
> any chance you could fix the draft, so that it parses? Once that's 
> done I can set up something that generates and publishes the HTML 
> version, plus diffs to RFC2518.
>
> Best regards, Julian





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This is a multi-part message in MIME format.
--------------080100000208060800060906
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
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Lisa Dusseault wrote:
> 
> Ok, I've fixed all the non-ASCII characters I was aware of.  I haven't 
> found a very good way to ensure those don't sneak in again but I'm sure 
> you'll alert me if they do.
> 
> Lisa

The way to check is to run it through a compliant XML parser. There 
really should be one on your system.

There are two other things that keep me from using this file:

- metadata should be updated so that people know they're not looking at 
draft -07 (docName attribute and date element)

- xml2rfc rejects the document because of the "strict" mode that is 
selected (because of artwork being too wide) -- please either fix the 
artwork, or relax the "strict" requirement for now.

Best regards, Julian

--------------080100000208060800060906
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Index: draft-ietf-webdav-rfc2518bis-latest.xml
===================================================================
RCS file: /var/cvsroot/xml2rfc/draft-ietf-webdav-rfc2518bis-latest.xml,v
retrieving revision 1.4
diff -r1.4 draft-ietf-webdav-rfc2518bis-latest.xml
2d1
< <?xml-stylesheet type='text/xsl' href='rfc2629.xslt' ?>
20a20
> <?rfc strict="yes"?>
22c22
< <rfc ipr="full3978" docName="draft-ietf-webdav-rfc2518bis-latest">
---
> <rfc ipr="full3978" docName="draft-ietf-webdav-rfc2518bis-07">
43c43
< <date month="October" year="2005" />
---
> <date month="July" year="2005" />

--------------080100000208060800060906--




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=172





------- Additional Comments From julian.reschke@greenbytes.de  2005-10-25 09:33 -------
The postfix notation of the "opaquelocktoken" scheme allows more freedom in
generating URIs than "urn:uuid". For instance, a server that internally uses a
simple string-typed (or numeric) lock identifiers can generate "opaquelocktoken"
URIs by simply appending the internal identifier to a single, fixed UUID. In
absence of that feature, it would need an additional lookup table to map
internals IDs to UUIDs.

So, no, "urn:uuid" can't be considered to "obsolete" the "opaquelocktoken" URI
scheme.

On the other hand, what do we gain from removing the scheme definition?
Simplifying (delegating most of the definitin to the URN:UUID spec) is a good
idea, but removing doesn't seem to be attractive to me.



------- You are receiving this mail because: -------
You are the QA contact for the bug, or are watching the QA contact.




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I set up call for this week at

Date/Time:         October 27, 2005 at 10:00 AM America/Los_Angeles
Length:            60 minutes
Meeting ID:        251807
Phone Numbers:     1-866-MEETME9 (US Toll-free)
                   1-650-260-9030 (Local/International)





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On 10/22/05 11:42 AM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> Yes, as a matter of fact I think it's a bad thing. We are revising
> RFC2518, which to me means
> 
> - fixing bugs (examples, typos)
> - removing stuff nobody does implement (such as DAV:propertybehaviour)
> - simplify things that were too complex in the first place (lock-null
> resources come to mind)
> - removing stuff that's not need today anymore (XML namespace
> explanations, UUID generation instructions...)
> - update references
> - add stuff that we agree was missing (DAV:lockroot...)
> 
> This may not be complete, but it should cover most cases.

We are also clarifying the Spec so that implementers end up implementing
versions that do interoperate.

> 
> Just adding prose without no actual need for it IMHO is a bad idea. Do
> that in FAQs, Blogs, online resources, implementor guides, books, whatever.

There is a fine line here. Someone skill in the art should be able to
correctly implement this by just reading the Spec and the documents it
normatively references. That does not mean we should right a basic tutorial
on how it all works or the sort of material that might be covered in WebDAV
book. It's a fine line to draw, but I tend to ask myself, if your average
implementer has a 20% chance of doing the wrong thing, you probably need
more advice or notes to keep them on the right path.

That is my somewhat philosophic answer, however, I have a far more pragmatic
thing you should keep in mind. The IESG has to read this, and if it makes no
sense to them, pain and suffering will ensue. This does not mean just the
apps ADs with an amazing background in the area has to read it, it means
that someone from a completely different area (say security) has to read it,
and understand it well enough to evaluate if it has significant issues. And
they are unlikely to read FAQs, Blogs etc because they are too busy.

In the case you are taking about here, I have no idea what the right line is
and I'm not supporting Lisa's or Julian's or anyone else opinion on it. I'm
just pointing out that this is not black or white but is one of the many
things where the WG will have to find some sort of reasonable balance.





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On 10/24/05 9:54 AM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> 
> Lisa Dusseault wrote:
>> I had assumed that removing opaquelocktoken from RFC2518bis would leave
>> it registered because it would remain registered in RFC2518. The BCP on
>> registering schemes (ftp://ftp.rfc-editor.org/in-notes/bcp/bcp35.txt)
>> doesn't say much on obsoleting schemes in STD track documents. The
>> registration page doesn't show any info about obsoleted or historic
>> schemes (http://www.iana.org/assignments/uri-schemes). However, it does
>> show several schemes (fax, modem) that were defined in an obsoleted RFC
>> (2806) and not redefined in the new RFC (3966).
>> 
>> Thus I conclude that leaving mention of opaquelocktoken out of
>> RFC2518bis would not lose its registration. Does that change any opinions?
> 
> Not yet. It may mean that I'm wrong, but it can also mean that IANA just
> forgot (did anybody tell them). Thus, those who want to take it out
> should please make sure that this doesn't have the effect of
> unregistering the scheme, for instance by asking the AD.
> 
> Best regards, Julian

Taking it out would not remove the registration or in any way stop it from
being used. We can get AD to confirm if you would like but I'm fairly
confident on this.

(As a side note, if you put text like "it MUST NOT be used" then it would
limit it use but still not remove the registration from IANA. I don't think
anyone is suggesting adding text like this that would limit its use)

Cullen




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On 10/23/05 2:44 PM, "Geoffrey M Clemm" <geoffrey.clemm@us.ibm.com> wrote:

> We have a large number of real issues to deal with.

That is definitely true. And I agree with Geoffrey we have to focus on the
ones that would be a show stopper to getting agreement on the final ASCII
text that we plan to send to IESG. 




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Cullen Jennings wrote:

> Taking it out would not remove the registration or in any way stop it from
> being used. We can get AD to confirm if you would like but I'm fairly
> confident on this.
> 
> (As a side note, if you put text like "it MUST NOT be used" then it would
> limit it use but still not remove the registration from IANA. I don't think
> anyone is suggesting adding text like this that would limit its use)
> 
> Cullen

1) I'm still not convinced. An implementer who sees a "opaquelocktoken" 
would then first go to IANA, and find out it's defined in RFC2518. The 
RFC Index will then point out that RFC2518 has been obsoleted by RFCxxxx 
(that's what we're going to do, right?). If that RFC doesn't mention the 
scheme anymore I think this will be confusing.

2) Why is the spec better in any way if the definition is removed? 
What's the advantage here?

3) To whose who think the scheme itself isn't needed anymore: this is 
simply incorrect (see 
<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=172#c1>):

> The postfix notation of the "opaquelocktoken" scheme allows more freedom in
> generating URIs than "urn:uuid". For instance, a server that internally uses a
> simple string-typed (or numeric) lock identifiers can generate "opaquelocktoken"
> URIs by simply appending the internal identifier to a single, fixed UUID. In
> absence of that feature, it would need an additional lookup table to map
> internals IDs to UUIDs.

Best regards, Julian






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Cullen Jennings wrote:
> ...
> There is a fine line here. Someone skill in the art should be able to
> correctly implement this by just reading the Spec and the documents it
> normatively references. That does not mean we should right a basic tutorial
> on how it all works or the sort of material that might be covered in WebDAV
> book. It's a fine line to draw, but I tend to ask myself, if your average
> implementer has a 20% chance of doing the wrong thing, you probably need
> more advice or notes to keep them on the right path.

a) Yes, but...:

b) Even if it's not about RFC2518 itself, but a normatively referenced 
spec? That is, do explanations/clarifications for HTTP belong into 
RFC2518bis, or RFC2616bis?

> That is my somewhat philosophic answer, however, I have a far more pragmatic
> thing you should keep in mind. The IESG has to read this, and if it makes no
> sense to them, pain and suffering will ensue. This does not mean just the
> apps ADs with an amazing background in the area has to read it, it means
> that someone from a completely different area (say security) has to read it,
> and understand it well enough to evaluate if it has significant issues. And
> they are unlikely to read FAQs, Blogs etc because they are too busy.

Yes, and if information is *needed*, it should be in the spec.

On the other hand, we're revising a spec that already has been accepted 
once. I would think it would make a lot of sense to keep changes to the 
minimum needed to achieve our goals. As a matter of fact, RFC2518 has 
had more contributors and reviewers than we can ever hope to find for 
RFC2518bis, so my proposal is to avoid changes unless they clearly 
enhance the spec.

> In the case you are taking about here, I have no idea what the right line is
> and I'm not supporting Lisa's or Julian's or anyone else opinion on it. I'm
> just pointing out that this is not black or white but is one of the many
> things where the WG will have to find some sort of reasonable balance.

Back to this issue:

1) I'm not aware of any interop problems.

2) I'm not aware of anybody having asked about this.

3) I don't see any benefit in RFC2518bis making statements about this, 
even if we *did* agree on what to say.

Best regards, Julian




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I agree with Julian's points, and would add that there is significant
experience that shows that these "helpful hints" can end up being the
greatest source of implementation confusion.  A prime example is the
the suggestion that "MOVE" be thought of as a "COPY followed by a DELETE".
People confuse these hints with normative text, and then base their
implementations on these hints rather than on the normative text.
So it is not enough to say "would this text answer this particular 
question",
but also have to check "can this text be misinterpreted in a way that
conflicts with the normative text".  And if the spec is already very long,
each new paragraph introduces the chance that reader fatigue will prevent
them from ever getting to the normative text, because of the amount of
intervening non-normative text.

Cheers,
Geoff

Julian wrote on 10/27/2005 08:48:51 AM:

> 
> Cullen Jennings wrote:
> > ...
> > There is a fine line here. Someone skill in the art should be able to
> > correctly implement this by just reading the Spec and the documents it
> > normatively references. That does not mean we should right a basic 
tutorial
> > on how it all works or the sort of material that might be covered in 
WebDAV
> > book. It's a fine line to draw, but I tend to ask myself, if your 
average
> > implementer has a 20% chance of doing the wrong thing, you probably 
need
> > more advice or notes to keep them on the right path.
> 
> a) Yes, but...:
> 
> b) Even if it's not about RFC2518 itself, but a normatively referenced 
> spec? That is, do explanations/clarifications for HTTP belong into 
> RFC2518bis, or RFC2616bis?
> 
> > That is my somewhat philosophic answer, however, I have a far 
morepragmatic
> > thing you should keep in mind. The IESG has to read this, and if it 
makes no
> > sense to them, pain and suffering will ensue. This does not mean just 
the
> > apps ADs with an amazing background in the area has to read it, it 
means
> > that someone from a completely different area (say security) has to 
read it,
> > and understand it well enough to evaluate if it has significant 
issues. And
> > they are unlikely to read FAQs, Blogs etc because they are too busy.
> 
> Yes, and if information is *needed*, it should be in the spec.
> 
> On the other hand, we're revising a spec that already has been accepted 
> once. I would think it would make a lot of sense to keep changes to the 
> minimum needed to achieve our goals. As a matter of fact, RFC2518 has 
> had more contributors and reviewers than we can ever hope to find for 
> RFC2518bis, so my proposal is to avoid changes unless they clearly 
> enhance the spec.
> 
> > In the case you are taking about here, I have no idea what the right 
line is
> > and I'm not supporting Lisa's or Julian's or anyone else opinion on 
it. I'm
> > just pointing out that this is not black or white but is one of the 
many
> > things where the WG will have to find some sort of reasonable balance.
> 
> Back to this issue:
> 
> 1) I'm not aware of any interop problems.
> 
> 2) I'm not aware of anybody having asked about this.
> 
> 3) I don't see any benefit in RFC2518bis making statements about this, 
> even if we *did* agree on what to say.
> 
> Best regards, Julian
> 

--=_alternative 004C4B92852570A7_=
Content-Type: text/html; charset="US-ASCII"


<br><font size=2><tt>I agree with Julian's points, and would add that there
is significant</tt></font>
<br><font size=2><tt>experience that shows that these &quot;helpful hints&quot;
can end up being the</tt></font>
<br><font size=2><tt>greatest source of implementation confusion. &nbsp;A
prime example is the</tt></font>
<br><font size=2><tt>the suggestion that &quot;MOVE&quot; be thought of
as a &quot;COPY followed by a DELETE&quot;.</tt></font>
<br><font size=2><tt>People confuse these hints with normative text, and
then base their</tt></font>
<br><font size=2><tt>implementations on these hints rather than on the
normative text.</tt></font>
<br><font size=2><tt>So it is not enough to say &quot;would this text answer
this particular question&quot;,</tt></font>
<br><font size=2><tt>but also have to check &quot;can this text be misinterpreted
in a way that</tt></font>
<br><font size=2><tt>conflicts with the normative text&quot;. &nbsp;And
if the spec is already very long,</tt></font>
<br><font size=2><tt>each new paragraph introduces the chance that reader
fatigue will prevent</tt></font>
<br><font size=2><tt>them from ever getting to the normative text, because
of the amount of</tt></font>
<br><font size=2><tt>intervening non-normative text.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br><font size=2><tt>Julian wrote on 10/27/2005 08:48:51 AM:<br>
<br>
&gt; <br>
&gt; Cullen Jennings wrote:<br>
&gt; &gt; ...<br>
&gt; &gt; There is a fine line here. Someone skill in the art should be
able to<br>
&gt; &gt; correctly implement this by just reading the Spec and the documents
it<br>
&gt; &gt; normatively references. That does not mean we should right a
basic tutorial<br>
&gt; &gt; on how it all works or the sort of material that might be covered
in WebDAV<br>
&gt; &gt; book. It's a fine line to draw, but I tend to ask myself, if
your average<br>
&gt; &gt; implementer has a 20% chance of doing the wrong thing, you probably
need<br>
&gt; &gt; more advice or notes to keep them on the right path.<br>
&gt; <br>
&gt; a) Yes, but...:<br>
&gt; <br>
&gt; b) Even if it's not about RFC2518 itself, but a normatively referenced
<br>
&gt; spec? That is, do explanations/clarifications for HTTP belong into
<br>
&gt; RFC2518bis, or RFC2616bis?<br>
&gt; <br>
&gt; &gt; That is my somewhat philosophic answer, however, I have a far
morepragmatic<br>
&gt; &gt; thing you should keep in mind. The IESG has to read this, and
if it makes no<br>
&gt; &gt; sense to them, pain and suffering will ensue. This does not mean
just the<br>
&gt; &gt; apps ADs with an amazing background in the area has to read it,
it means<br>
&gt; &gt; that someone from a completely different area (say security)
has to read it,<br>
&gt; &gt; and understand it well enough to evaluate if it has significant
issues. And<br>
&gt; &gt; they are unlikely to read FAQs, Blogs etc because they are too
busy.<br>
&gt; <br>
&gt; Yes, and if information is *needed*, it should be in the spec.<br>
&gt; <br>
&gt; On the other hand, we're revising a spec that already has been accepted
<br>
&gt; once. I would think it would make a lot of sense to keep changes to
the <br>
&gt; minimum needed to achieve our goals. As a matter of fact, RFC2518
has <br>
&gt; had more contributors and reviewers than we can ever hope to find
for <br>
&gt; RFC2518bis, so my proposal is to avoid changes unless they clearly
<br>
&gt; enhance the spec.<br>
&gt; <br>
&gt; &gt; In the case you are taking about here, I have no idea what the
right line is<br>
&gt; &gt; and I'm not supporting Lisa's or Julian's or anyone else opinion
on it. I'm<br>
&gt; &gt; just pointing out that this is not black or white but is one
of the many<br>
&gt; &gt; things where the WG will have to find some sort of reasonable
balance.<br>
&gt; <br>
&gt; Back to this issue:<br>
&gt; <br>
&gt; 1) I'm not aware of any interop problems.<br>
&gt; <br>
&gt; 2) I'm not aware of anybody having asked about this.<br>
&gt; <br>
&gt; 3) I don't see any benefit in RFC2518bis making statements about this,
<br>
&gt; even if we *did* agree on what to say.<br>
&gt; <br>
&gt; Best regards, Julian<br>
&gt; <br>
</tt></font>
--=_alternative 004C4B92852570A7_=--




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bugzilla@soe.ucsc.edu wrote:

>------- Additional Comments From lisa@osafoundation.org  2005-10-15 16:37 -------
>Proposed text for -08:
>
>      When trying to lock a collection upon 
>      creation, clients may attempt to increase the likelihood of this by 
>      pipelining the MKCOL and LOCK requests together (but because this 
>      doesn't convert two separate operations into one atomic operation 
>      there's no guarantee this will work). 
>
I have no problems with the proposed text.


Cheers,
Elias




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As discussed in todays conference call, this text will be moved to an 
appendix.


Best,
Elias


bugzilla@soe.ucsc.edu wrote:

>http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=172
>------- Additional Comments From julian.reschke@greenbytes.de  2005-10-25 09:33 -------
>The postfix notation of the "opaquelocktoken" scheme allows more freedom in
>generating URIs than "urn:uuid". For instance, a server that internally uses a
>simple string-typed (or numeric) lock identifiers can generate "opaquelocktoken"
>URIs by simply appending the internal identifier to a single, fixed UUID. In
>absence of that feature, it would need an additional lookup table to map
>internals IDs to UUIDs.
>
>So, no, "urn:uuid" can't be considered to "obsolete" the "opaquelocktoken" URI
>scheme.
>
>On the other hand, what do we gain from removing the scheme definition?
>Simplifying (delegating most of the definitin to the URN:UUID spec) is a good
>idea, but removing doesn't seem to be attractive to me.
>





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bugzilla@soe.ucsc.edu wrote:

>http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=14
>
Definately a major issue...  :-)

Summary notes from todays conference call:
There are currently servers which both DO and DO NOT change ETags on 
property changes, hence there is a risk in obsoleting existing 
implementations regardless of the path the WG takes on this issue.
Further, there are clear disadvantages to distributed authoring clients 
if an ETag changes due to a property update, without the resource body 
changing.

Jim suggests introducing PTag for property changes, and I agree this 
would be useful, however introducing this into a revision of an existing 
spec will create problems. Julian suggests that this would belong in a 
seperate specification.

Rough concensus reached to use SHOULD NOT with respect to changing ETags 
on property changes - Lisa to make edit...

Hope this captured the gist of the conversation, please feel free to add 
anything that may be useful.


Best,
Elias




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=14

lisa@osafoundation.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|joe-bugzilla@cursive.net    |lisa@osafoundation.org



------- Additional Comments From lisa@osafoundation.org  2005-10-27 10:47 -------
Next action proposed on phone conference October 27 (Julian, Jim, Elias, Cullen,
Lisa): servers SHOULD NOT change the ETag of a resource only because the dead
properties have been changed.  

This is basically a change from the 07 version of the spec replacing MUST NOT
with SHOULD NOT, thus relaxing the requirement, but compared to RFC2518 this is
a strengthened or added requirement.



------- You are receiving this mail because: -------
You are the QA contact for the bug, or are watching the QA contact.




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=14

lisa@osafoundation.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED





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From w3c-dist-auth-request@frink.w3.org Thu Oct 27 13:58:51 2005
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Julian Reschke wrote:

> Proposed resolution for 
> <http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23>: [...]
> NEW:
>    A lock token is a type of state token, represented as a URI, which
>    identifies a particular lock.  Each lock has exactly one unique lock
>    token, which is returned upon a successful LOCK creation operation in
>    the "Lock-Token" response header defined in Section 9.6.

I have no issues with the proposed text.


Cheers,
Elias




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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=17

lisa@osafoundation.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED



------- Additional Comments From lisa@osafoundation.org  2005-10-27 11:06 -------
On the understanding that when we've agreed on text or text changes, we resolve
bugs as "fixed", I'm resolving this.



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From w3c-dist-auth-request@frink.w3.org Thu Oct 27 14:21:01 2005
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I believe the following captures our most recent discussion on the 
meaning of a bugs status.

NEW: The bug is new.
ASSIGNED: The assigned person will take point on proposing new text.
RESOLVED: The WG has reached rough concensus on a proposed change. Note 
that the type of resolution (e.g. FIXED, INVALID...) is NOT being used 
to indicate anything presently, as the available options don't seem to 
fit our process very well.
VERIFIED: The text has been verified as included in the current revision 
of draft (published to webdav.org). The status will be changed to by the 
verifier.
CLOSED: The latest draft, including the agreed upon text, has been 
submitted to IETF.

We will look into modifying the available types of resolutions so that 
they may more closely reflect our process...


Best,
Elias




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I am okay with the change, below.

Best,
Elias


Julian Reschke wrote:

> For the record, the change is:
> Section 8., para. 61:
> OLD:
>     This example also demonstrates the use of XML namespace scoping and
>     the default namespace.  Since the "xmlns" attribute does not contain
>     a prefix, the namespace applies by default to all enclosed elements.
>     Hence, all elements which do not explicitly state the namespace to
>     which they belong are members of the "DAV:" namespace schema.
>
> NEW:
>     This example also demonstrates the use of XML namespace scoping and
>     the default namespace.  Since the "xmlns" attribute does not contain
>     a prefix, the namespace applies by default to all enclosed elements.
>     Hence, all elements which do not explicitly state the namespace to
>     which they belong are members of the "DAV:" namespace. 






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Elias,

This sounds good to me. Only two tweaks

* we had agreed that the new text proposals would be to the list, and  
not within Bugzilla
* we had agreed that anyone can perform the verification task (except  
the editor who made the change)

- Jim

On Oct 27, 2005, at 11:19 AM, Elias Sinderson wrote:

>
> I believe the following captures our most recent discussion on the  
> meaning of a bugs status.
>
> NEW: The bug is new.
> ASSIGNED: The assigned person will take point on proposing new text.
> RESOLVED: The WG has reached rough concensus on a proposed change.  
> Note that the type of resolution (e.g. FIXED, INVALID...) is NOT  
> being used to indicate anything presently, as the available options  
> don't seem to fit our process very well.
> VERIFIED: The text has been verified as included in the current  
> revision of draft (published to webdav.org). The status will be  
> changed to by the verifier.
> CLOSED: The latest draft, including the agreed upon text, has been  
> submitted to IETF.
>
> We will look into modifying the available types of resolutions so  
> that they may more closely reflect our process...
>
>
> Best,
> Elias
>





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From: Jim Whitehead <ejw@soe.ucsc.edu>
Date: Thu, 27 Oct 2005 16:50:06 -0700
To: Julian Reschke <julian.reschke@gmx.de>
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>

Julian writes:
> Back to this issue:
>
> 1) I'm not aware of any interop problems.
>
> 2) I'm not aware of anybody having asked about this.
>
> 3) I don't see any benefit in RFC2518bis making statements about  
> this, even if we *did* agree on what to say

I have just read through this entire thread, and I agree with his  
statement above, and the conclusion Julian reached in:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0294.html

Specifically:

* I don't think there is a compelling need to disallow Location and 207
* I don't think we need any special mechanism for handling 3xx within  
a PROPFIND
* I think it's fine if a client needs to retry a PROPFIND request if  
it receives a 3xx response

I feel a slight desire to add a 3xx response to one of the PROPFIND  
207 response examples in the text, but could live without it.

Unless others chime in, I think we're seeing rough consensus for  
removing the current 8.1.3, whose text is described in Bug 12 within  
Bugzilla:
http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=12

- Jim







From w3c-dist-auth-request@frink.w3.org Thu Oct 27 20:34:51 2005
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From: Jim Whitehead <ejw@soe.ucsc.edu>
Date: Thu, 27 Oct 2005 17:34:39 -0700
To: Julian Reschke <julian.reschke@gmx.de>
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>

Julian writes:

> So this is a process issue -- if it's supposed to become part of  
> WebDAV, it has to make it through the process of (1) define what  
> the problem is, then (2) find a WG consensus of how to resolve  
> this. "Force-Authenticate" may very well be the solution.

OK, I feel pretty strongly about this feature, so let me do the due  
diligence here.

PROBLEM STATEMENT

Some WebDAV servers are configured to allow live authoring, where the  
authored changes are immediately visible to the external world. In  
this situation, resources typically have access controls set such  
that GET, HEAD, POST, PROPFIND and OPTIONS can be performed by any  
user without authentication. Write operations such as PUT, LOCK,  
UNLOCK, MKCOL, MOVE, and COPY require authentication and access  
permissions. In some cases, a client would do a series of operations  
that do not require authentication, then perform a PUT of a large  
resource (this can happen with the common Microsoft Web Folders  
client). In this situation, the large resource body needs to be sent  
twice: the initial PUT (which gets a 401 response), and the second  
PUT, with authentication credentials.

Ideally, a client would like to test a resource to see whether it  
should ever send authentication credentials. It is far more  
convenient for a client author to make a single test at the beginning  
of a session, discover that some methods will require authentication  
credentials, and then consistently supply those authentication  
credentials for every method invocation thereafter. Since a client  
does not know which authentication scheme is in use, or what nonce  
values will be used in Digest Auth, it cannot speculatively provide  
authentication values without receiving a challenge (401) from the  
server first. While in general it is the case that authentication  
requirements can vary by method, even on the same resource, this  
configuration is extremely unusual. Hence, a client that proactively  
supplies a set of authentication credentials gathered from testing  
one method that requires authentication (PUT, say), will likely find  
that these same authentication credentials will work for all other  
methods (LOCK, UNLOCK, etc.) on the same resource that also require  
authentication.

SOLUTION REQUIREMENTS

R1: A client must be able to request an authentication challenge  
without causing a state change on the server
R2:  The mechanism for the authentication challenge must be clearly  
identifiable within the specification
R3: The client must be able to indicate which method the challenge  
pertains to (since this can potentially vary by method, though it  
usually doesn't)

SOLUTION PROPOSAL

I like the Force-Authenticate header as defined in the current draft.  
I don't like the If approach (submit an If header with a known bad  
lock token, hence the method will fail) for three reasons:

* I feel uncomfortable depending on an unintended use of the If  
header -- especially for PUT, if a server ever doesn't handle If  
correctly, the forcing of authentication could inadvertently change  
the contents of the resource (assuming you'd force authentication  
with a zero length body with PUT)
* It depends on the execution order of authentication vs. If header  
processing within servers (I note this was rebutted in:
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/ 
0335.html  and I also note that mod_dav does do authentication checks  
before If checks)
* It's a really obscure way of satisfying the requirements (i.e., it  
fails requirement R2)


My strong preference is for a new mechanism here (Force- 
Authenticate), though I could perhaps be swayed to adding a new  
section to the specification that explicitly describes the use of If  
to force authentication, and gives an example of how this works. I  
don't think this mechanism is one that most implementors would think  
of, even if the have a deep understanding of the spec (like, me, for  
example, who never thought of this).

- Jim










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+1

w3c-dist-auth-request@w3.org wrote on 10/27/2005 07:50:06 PM:

> 
> >
> 
> Julian writes:
> > Back to this issue:
> >
> > 1) I'm not aware of any interop problems.
> >
> > 2) I'm not aware of anybody having asked about this.
> >
> > 3) I don't see any benefit in RFC2518bis making statements about 
> > this, even if we *did* agree on what to say
> 
> I have just read through this entire thread, and I agree with his 
> statement above, and the conclusion Julian reached in:
> http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0294.html
> 
> Specifically:
> 
> * I don't think there is a compelling need to disallow Location and 207
> * I don't think we need any special mechanism for handling 3xx within 
> a PROPFIND
> * I think it's fine if a client needs to retry a PROPFIND request if 
> it receives a 3xx response
> 
> I feel a slight desire to add a 3xx response to one of the PROPFIND 
> 207 response examples in the text, but could live without it.
> 
> Unless others chime in, I think we're seeing rough consensus for 
> removing the current 8.1.3, whose text is described in Bug 12 within 
> Bugzilla:
> http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=12
> 
> - Jim
> 
> 
> 
> 

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<br><font size=2 face="sans-serif">+1</font>
<br>
<br><font size=2><tt>w3c-dist-auth-request@w3.org wrote on 10/27/2005 07:50:06
PM:<br>
<br>
&gt; <br>
&gt; &gt;<br>
&gt; <br>
&gt; Julian writes:<br>
&gt; &gt; Back to this issue:<br>
&gt; &gt;<br>
&gt; &gt; 1) I'm not aware of any interop problems.<br>
&gt; &gt;<br>
&gt; &gt; 2) I'm not aware of anybody having asked about this.<br>
&gt; &gt;<br>
&gt; &gt; 3) I don't see any benefit in RFC2518bis making statements about
&nbsp;<br>
&gt; &gt; this, even if we *did* agree on what to say<br>
&gt; <br>
&gt; I have just read through this entire thread, and I agree with his
&nbsp;<br>
&gt; statement above, and the conclusion Julian reached in:<br>
&gt; http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0294.html<br>
&gt; <br>
&gt; Specifically:<br>
&gt; <br>
&gt; * I don't think there is a compelling need to disallow Location and
207<br>
&gt; * I don't think we need any special mechanism for handling 3xx within
&nbsp;<br>
&gt; a PROPFIND<br>
&gt; * I think it's fine if a client needs to retry a PROPFIND request
if &nbsp;<br>
&gt; it receives a 3xx response<br>
&gt; <br>
&gt; I feel a slight desire to add a 3xx response to one of the PROPFIND
&nbsp;<br>
&gt; 207 response examples in the text, but could live without it.<br>
&gt; <br>
&gt; Unless others chime in, I think we're seeing rough consensus for &nbsp;<br>
&gt; removing the current 8.1.3, whose text is described in Bug 12 within
&nbsp;<br>
&gt; Bugzilla:<br>
&gt; http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=12<br>
&gt; <br>
&gt; - Jim<br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
</tt></font>
--=_alternative 0012154C852570A8_=--




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Julian Reschke wrote:
> Lisa Dusseault wrote:
> 
>>
>> Ok, I've fixed all the non-ASCII characters I was aware of.  I haven't 
>> found a very good way to ensure those don't sneak in again but I'm 
>> sure you'll alert me if they do.
>>
>> Lisa
> 
> 
> The way to check is to run it through a compliant XML parser. There 
> really should be one on your system.
> 
> There are two other things that keep me from using this file:
> 
> - metadata should be updated so that people know they're not looking at 
> draft -07 (docName attribute and date element)
> 
> - xml2rfc rejects the document because of the "strict" mode that is 
> selected (because of artwork being too wide) -- please either fix the 
> artwork, or relax the "strict" requirement for now.
> 
> Best regards, Julian

Lisa,

any chance that you could fix that? This is the one thing that stops me 
from auto-generating TXT, HTML and diffs on our web site.

Best regards, Julian




From w3c-dist-auth-request@frink.w3.org Fri Oct 28 09:50:29 2005
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Jim,

thanks for doing the "right thing" here. Comments inline.

Jim Whitehead wrote:
>  ...
> SOLUTION REQUIREMENTS
> 
> R1: A client must be able to request an authentication challenge  
> without causing a state change on the server
> R2:  The mechanism for the authentication challenge must be clearly  
> identifiable within the specification
> R3: The client must be able to indicate which method the challenge  
> pertains to (since this can potentially vary by method, though it  
> usually doesn't)
> 
> SOLUTION PROPOSAL
> 
> I like the Force-Authenticate header as defined in the current draft.  I 
> don't like the If approach (submit an If header with a known bad  lock 
> token, hence the method will fail) for three reasons:
> 
> * I feel uncomfortable depending on an unintended use of the If  header 
> -- especially for PUT, if a server ever doesn't handle If  correctly, 
> the forcing of authentication could inadvertently change  the contents 
> of the resource (assuming you'd force authentication  with a zero length 
> body with PUT)

I don't feel that we should add new features to the spec just because we 
fear that some servers may not get the existing stuff right. I a server 
doesn't handle the If header correctly upon PUT, this is a bug that 
needs to be fixed anyway.

As a matter of fact, of the servers I recently tested 
(<http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0328.html>), 
two were failing here, one of which not doing "If" checks at all, the 
other one treating unknown state tokens incorrectly. The latter is 
moddav, the bug is reported in 
<http://issues.eu.apache.org/bugzilla/show_bug.cgi?id=37288>, and Joe 
Orton has already attached a proposed patch.

The other servers (SAP Netweaver, Xythos, MS IIS) work as expected.

> * It depends on the execution order of authentication vs. If header  
> processing within servers (I note this was rebutted in:
> http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/ 0335.html  
> and I also note that mod_dav does do authentication checks  before If 
> checks)

Yep. Is anybody aware of servers working differently.

> * It's a really obscure way of satisfying the requirements (i.e., it  
> fails requirement R2)

That can be fixed by putting that as note into an appendix.

> My strong preference is for a new mechanism here (Force- Authenticate), 
> though I could perhaps be swayed to adding a new  section to the 
> specification that explicitly describes the use of If  to force 
> authentication, and gives an example of how this works. I  don't think 
> this mechanism is one that most implementors would think  of, even if 
> the have a deep understanding of the spec (like, me, for  example, who 
> never thought of this).

I have no problem adding non-normative text explaining this.

On the other hand I'd really like to hear from those client 
implementors. After the three years ago, did anybody actually try the 
solution proposed back then? If not, why not?

Best regards, Julian




From w3c-dist-auth-request@frink.w3.org Fri Oct 28 13:35:40 2005
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The IESG just approved draft-hansen-2717bis-2718bis-uri-guidelines
on the telechat yesterday.  As you'll note when reading it, URI
schemes published in standards track RFCs will be in the "permanent"
registry; an update may be later undertaken to move them to "historic",
but this requires a specific action and approval by the IESG (moves from
"provisional" to "historic" are simpler).

There are a number of typos in the -06 version, I have to admit, so
read it with the RFC editor note.  There was a published -07, but it
was withdrawn as approval of the -06+RFC Editor Note had already
been given.

					Ted




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From: Lisa Dusseault <lisa@osafoundation.org>
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Let me know if the version I uploaded today fixes the "strict" mode 
thing, i'm not sure I understand the problem there as I've had no 
trouble having xml2rfc run on the document (the version on the 
xml.resource.org site is the one I use)

lisa

On Oct 28, 2005, at 12:50 AM, Julian Reschke wrote:

> Julian Reschke wrote:
>> Lisa Dusseault wrote:
>>>
>>> Ok, I've fixed all the non-ASCII characters I was aware of.  I 
>>> haven't found a very good way to ensure those don't sneak in again 
>>> but I'm sure you'll alert me if they do.
>>>
>>> Lisa
>> The way to check is to run it through a compliant XML parser. There 
>> really should be one on your system.
>> There are two other things that keep me from using this file:
>> - metadata should be updated so that people know they're not looking 
>> at draft -07 (docName attribute and date element)
>> - xml2rfc rejects the document because of the "strict" mode that is 
>> selected (because of artwork being too wide) -- please either fix the 
>> artwork, or relax the "strict" requirement for now.
>> Best regards, Julian
>
> Lisa,
>
> any chance that you could fix that? This is the one thing that stops 
> me from auto-generating TXT, HTML and diffs on our web site.
>
> Best regards, Julian





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On Oct 28, 2005, at 6:47 AM, Julian Reschke wrote:

>
> Jim,
>
> thanks for doing the "right thing" here. Comments inline.
>
> Jim Whitehead wrote:
>>  ...
>> SOLUTION REQUIREMENTS
>> R1: A client must be able to request an authentication challenge   
>> without causing a state change on the server
>> R2:  The mechanism for the authentication challenge must be  
>> clearly  identifiable within the specification
>> R3: The client must be able to indicate which method the  
>> challenge  pertains to (since this can potentially vary by method,  
>> though it  usually doesn't)
>> SOLUTION PROPOSAL
>> I like the Force-Authenticate header as defined in the current  
>> draft.  I don't like the If approach (submit an If header with a  
>> known bad  lock token, hence the method will fail) for three reasons:
>> * I feel uncomfortable depending on an unintended use of the If   
>> header -- especially for PUT, if a server ever doesn't handle If   
>> correctly, the forcing of authentication could inadvertently  
>> change  the contents of the resource (assuming you'd force  
>> authentication  with a zero length body with PUT)
>
> I don't feel that we should add new features to the spec just  
> because we fear that some servers may not get the existing stuff  
> right. I a server doesn't handle the If header correctly upon PUT,  
> this is a bug that needs to be fixed anyway.
>
> As a matter of fact, of the servers I recently tested (<http:// 
> lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0328.html>),  
> two were failing here, one of which not doing "If" checks at all,  
> the other one treating unknown state tokens incorrectly. The latter  
> is moddav, the bug is reported in <http://issues.eu.apache.org/ 
> bugzilla/show_bug.cgi?id=37288>, and Joe Orton has already attached  
> a proposed patch.
>
> The other servers (SAP Netweaver, Xythos, MS IIS) work as expected.
>
>> * It depends on the execution order of authentication vs. If  
>> header  processing within servers (I note this was rebutted in:
>> http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/  
>> 0335.html  and I also note that mod_dav does do authentication  
>> checks  before If checks)
>
> Yep. Is anybody aware of servers working differently.
>
>> * It's a really obscure way of satisfying the requirements (i.e.,  
>> it  fails requirement R2)
>
> That can be fixed by putting that as note into an appendix.
>
>> My strong preference is for a new mechanism here (Force-  
>> Authenticate), though I could perhaps be swayed to adding a new   
>> section to the specification that explicitly describes the use of  
>> If  to force authentication, and gives an example of how this  
>> works. I  don't think this mechanism is one that most implementors  
>> would think  of, even if the have a deep understanding of the spec  
>> (like, me, for  example, who never thought of this).
>
> I have no problem adding non-normative text explaining this.
>
> On the other hand I'd really like to hear from those client  
> implementors. After the three years ago, did anybody actually try  
> the solution proposed back then? If not, why not?
>
> Best regards, Julian

> On the other hand I'd really like to hear from those client  
> implementors. After the three years ago, did anybody actually try  
> the solution proposed back then?

No, we didn't try it. The Mac OS X WebDAV file system handles  
challenges as it gets them and uses the protection space/domain rules  
in rfc2617 to determine when the credentials should be sent with a  
transaction.

> If not, why not?

Unlike some other clients, Mac OS X WebDAV file system always takes a  
LOCK on a resource when the file (resource) is opened with write  
access (and if LOCKs are not supported by the server, its a read-only  
mount for us). In addition, when the Mac OS X WebDAV file system is  
told to create a file that doesn't exist, it issues a PUT with a  
content-length of 0 to create an empty resource on the server (thus  
reserving the name space). Since both of those operations generate a  
challenge, we don't have the problem this bug is trying to solve.

- Jim





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Jim,

thanks for the explanation (the situation for our client is similar).

Best regards, Julian





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Lisa Dusseault wrote:
> Let me know if the version I uploaded today fixes the "strict" mode 
> thing, i'm not sure I understand the problem there as I've had no 
> trouble having xml2rfc run on the document (the version on the 
> xml.resource.org site is the one I use)

The version I have stops processing when it's run in strict mode, and 
artwork is too wide (you may want to check out 
<http://xml.resource.org/experimental.html>).

Best regards, Julian




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Ok,

here's a procedural question.

I have made a proposal to resolve these issues, and in the conference 
call we have sort-of agreed to that plan (for instance, keep 
opaquelocktoken, but move it to an appendix).

The new draft posted by Lisa *also* does this, but it doesn't use the 
text I proposed. In particular, it still refers to outdated documents.

If the working group wants people to propose ready-for-spec text, then I 
think that text should either be used, or those you don't like it should 
at least state what was wrong with it.

For the record, I proposed:

  Appendix C.  'opaquelocktoken' URI Scheme

    The 'opaquelocktoken' URI scheme defined below uses the Universal
    Unique Identifier (UUID) mechanism ([9], Section 4) to easily
    generate lock tokens fulfilling the uniqueness requirements stated in
    Section 6.3.

      OpaqueLockToken-URI = "opaquelocktoken:" UUID [path]
      ; UUID: see [RFC4122], Section 3.
      ; path: see [RFC3986], Section 3.3.

    Note that the optional "path" postfix allows to generate many lock
    tokens from a single URI, by appending an varying string such as a
    sequence number.

    Example:

      opaquelocktoken:f81de2ad-7f3d-a1b2-4f3c-00a0c91a9d76-0017

which is IMHO much better then the text we now got:

Appendix D.  The opaquelocktoken scheme and URIs

    The 'opaquelocktoken' URI scheme was defined in RFC2518 (and
    registered by IANA) in order to create syntactically correct and
    easy-to-generate URIs out of UUIDs, intended to be used as lock
    tokens and to be unique across all resources for all time.  This
    scheme has been obsoleted by [9], but is re-defined here for clarity.

    A server MAY generate one ore more UUIDs to use with the
    'opaquelocktoken' scheme as lock tokens.  A server MAY reuse a UUID
    with extension characters added.  If the server does this then the
    algorithm generating the extensions MUST guarantee that the same
    extension will never be used twice with the associated UUID.

    OpaqueLockToken-URI = "opaquelocktoken:" UUID [Extension]  ; The UUID
    production is the string representation of a UUID.  Note that white
    space (LWS) is not allowed between elements of this production.

    Extension = path  ; path is defined in section 3.3 of RFC2396 [5]


In particular:

- no, opaquelocktoken has *not* been obsoleted; it still does more that 
urn:uuid does

- What is "A server MAY generate one ore more UUIDs to use with the 
'opaquelocktoken' scheme as lock tokens." supposed to mean???

- "If the server does this then the algorithm generating the extensions 
MUST guarantee that the same extension will never be used twice with the 
associated UUID." - that's by definition of the lock token uniqueness; 
I'm not sure why it's repeated here.

- "OpaqueLockToken-URI = "opaquelocktoken:" UUID [Extension]  ; ..." -- 
just refer to the normative definition in RFC4122

- "Extension = path"... -- RFC2396 is obsoleted. Really :-)


Best regards, Julian












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Hi.

More changes that I think do not represent WG consensus:

1: 
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-latest.html#rfc.section.9.5.3.p.4>:

--
The Not production is particularly useful with the "<DAV:no-lock>" state 
token. The clause "Not <DAV:no-lock>" MUST evaluate to true. Thus, any 
"OR" statement containing the clause "Not <DAV:no-lock>" MUST also 
evaluate to true.
--

This now says MUST instead of "must". I'm not sure why RFC2119 
terminology is invoked here. URIs in the DAV: namespace by definition 
never represent a lock token, because they can only be assigned by the 
IETF or this WG. So the statement applies to *all* URIs that use the 
DAV: URI scheme, "DAV:no-lock" is just one example.

If you really feel that this needs to be stated somewhere, please don't 
make it sound as if "DAV:no-lock" is different from -- for instance -- 
"DAV:lock".



2: 
<http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis-latest-from-07.diff.html#diff-30>:

Why was the registration for "opaquelocktoken" removed from the IANA 
considerations? Thinking of it, why was the definition for the "DAV" URI 
scheme removed as well?????

Please undo.


Best regards, Julian




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From: Lisa Dusseault <lisa@osafoundation.org>
Date: Fri, 28 Oct 2005 14:17:46 -0700
To: Geoffrey M Clemm <geoffrey.clemm@us.ibm.com>
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--Apple-Mail-12--244272394
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Well I do agree on removing this section, and that supporting Location=20=

with 207 responses isn't necessary.   That means there's some text=20
early in section 12 that can go away, as well.

However, without those pieces of text, the use of the Location header=20
with 207 responses becomes undefined, and that always makes me feel=20
uncomfortable.    Server implementors won't know for sure if they can=20
use the Location header, it seems logical that it might work but as=20
we've seen there are some subtleties in how the client might interpret=20=

that.  Clients are probably not prepared to handle it.  So I propose=20
that we include text to be clear that the Location header SHOULD NOT=20
appear in certain responses.

I'm sensitive to the worry of preventing extensions but surely there's=20=

some way of dealing with that.  An extension can override "SHOULD"=20
level requirements, or we could come up with some "exception"=20
language... as in "servers SHOULD NOT return a Location header in these=20=

responses unless the client has some way to interpret that header."

Lisa

On Oct 27, 2005, at 8:17 PM, Geoffrey M Clemm wrote:

>
> +1
>
> w3c-dist-auth-request@w3.org wrote on 10/27/2005 07:50:06 PM:
>
>  >
>  > >
>  >
>  > Julian writes:
>  > > Back to this issue:
>  > >
>  > > 1) I'm not aware of any interop problems.
>  > >
>  > > 2) I'm not aware of anybody having asked about this.
>  > >
>  > > 3) I don't see any benefit in RFC2518bis making statements about =
=A0
>  > > this, even if we *did* agree on what to say
>  >
>  > I have just read through this entire thread, and I agree with his =A0=

>  > statement above, and the conclusion Julian reached in:
>  >=20
> http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0294.html
>  >
>  > Specifically:
>  >
>  > * I don't think there is a compelling need to disallow Location and=20=

> 207
>  > * I don't think we need any special mechanism for handling 3xx=20
> within =A0
>  > a PROPFIND
>  > * I think it's fine if a client needs to retry a PROPFIND request=20=

> if =A0
>  > it receives a 3xx response
>  >
>  > I feel a slight desire to add a 3xx response to one of the PROPFIND=20=

> =A0
>  > 207 response examples in the text, but could live without it.
>  >
>  > Unless others chime in, I think we're seeing rough consensus for =A0
>  > removing the current 8.1.3, whose text is described in Bug 12=20
> within =A0
>  > Bugzilla:
>  > http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D12
>  >
>  > - Jim
>  >
>  >
>  >
>  >

--Apple-Mail-12--244272394
Content-Type: text/enriched;
	charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

Well I do agree on removing this section, and that supporting Location
with 207 responses isn't necessary.   That means there's some text
early in section 12 that can go away, as well.


However, without those pieces of text, the use of the Location header
with 207 responses becomes undefined, and that always makes me feel
uncomfortable.    Server implementors won't know for sure if they can
use the Location header, it seems logical that it might work but as
we've seen there are some subtleties in how the client might interpret
that.  Clients are probably not prepared to handle it.  So I propose
that we include text to be clear that the Location header SHOULD NOT
appear in certain responses. =20


I'm sensitive to the worry of preventing extensions but surely there's
some way of dealing with that.  An extension can override "SHOULD"
level requirements, or we could come up with some "exception"
language... as in "servers SHOULD NOT return a Location header in
these responses unless the client has some way to interpret that
header."


Lisa=20


On Oct 27, 2005, at 8:17 PM, Geoffrey M Clemm wrote:


<excerpt>

<smaller>+1</smaller>=20


<fixed><x-tad-smaller>w3c-dist-auth-request@w3.org wrote on 10/27/2005
07:50:06 PM:</x-tad-smaller></fixed>


<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Julian writes:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > Back to this issue:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > 1) I'm not aware of any interop =
problems.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > 2) I'm not aware of anybody having asked
about this.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > 3) I don't see any benefit in RFC2518bis
making statements about =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > this, even if we *did* agree on what to =
say</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > I have just read through this entire thread,
and I agree with his =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > statement above, and the conclusion Julian
reached in:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> >
=
http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0294.html</x-=
tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Specifically:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > * I don't think there is a compelling need to
disallow Location and 207</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > * I don't think we need any special mechanism
for handling 3xx within =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > a PROPFIND</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > * I think it's fine if a client needs to
retry a PROPFIND request if =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > it receives a 3xx =
response</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > I feel a slight desire to add a 3xx response
to one of the PROPFIND =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > 207 response examples in the text, but could
live without it.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Unless others chime in, I think we're seeing
rough consensus for =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > removing the current 8.1.3, whose text is
described in Bug 12 within =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Bugzilla:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> >
=
http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D12</x-tad-smaller=
></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > - Jim</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

</excerpt>=

--Apple-Mail-12--244272394--





From w3c-dist-auth-request@frink.w3.org Fri Oct 28 17:36:42 2005
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Lisa Dusseault wrote:
> Well I do agree on removing this section, and that supporting Location 
> with 207 responses isn't necessary. That means there's some text early 
> in section 12 that can go away, as well.
> 
> However, without those pieces of text, the use of the Location header 
> with 207 responses becomes undefined, and that always makes me feel 
> uncomfortable. Server implementors won't know for sure if they can use 

The "Location" header is defined by RFC2616. Multistatus response bodies 
are defined in RFC2518. Are you saying that those definitions are 
incompatible? That would be a bug. If they aren't, there's nothing that 
needs to be fixed.

> the Location header, it seems logical that it might work but as we've 
> seen there are some subtleties in how the client might interpret that. 
> Clients are probably not prepared to handle it. So I propose that we 
> include text to be clear that the Location header SHOULD NOT appear in 
> certain responses.

Do you have any evidence of interoperability problems because RFC2518 
doesn't say anything about this?

> I'm sensitive to the worry of preventing extensions but surely there's 
> some way of dealing with that. An extension can override "SHOULD" level 
> requirements, or we could come up with some "exception" language... as 
> in "servers SHOULD NOT return a Location header in these responses 
> unless the client has some way to interpret that header."

-1.

Please define what the problem is with what RFC2518 and RFC2616 
currently say. We can then discuss whether there's a need to fix one of 
them.

Best regards, Julian




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--Apple-Mail-77--243020323
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>
Lisa writes:

> However, without those pieces of text, the use of the Location  
> header with 207 responses becomes undefined, and that always makes  
> me feel uncomfortable.    Server implementors won't know for sure  
> if they can use the Location header, it seems logical that it might  
> work but as we've seen there are some subtleties in how the client  
> might interpret that.  Clients are probably not prepared to handle  
> it.  So I propose that we include text to be clear that the  
> Location header SHOULD NOT appear in certain responses.

The HTTP specification generally doesn't explain all interactions of  
methods, headers, and response codes. Location only has defined  
semantics for certain response codes in HTTP.

On the other hand, the HTTP spec. isn't necessarily such a paragon of  
good writing that we should strive to emulate it.

My solution to this issue is to add the text:

"Use of the Location header with the methods and response codes  
defined in this specification is intentionally undefined."

And leave it at that. This lets clients know they can't depend on the  
feature, and lets servers know they probably shouldn't go there. But,  
if a later spec. does add something here (like a refined REDIRECT  
spec.), then the door is left open for new behavior.

Can we please close this issue?

- Jim

>
> I'm sensitive to the worry of preventing extensions but surely  
> there's some way of dealing with that.  An extension can override  
> "SHOULD" level requirements, or we could come up with some  
> "exception" language... as in "servers SHOULD NOT return a Location  
> header in these responses unless the client has some way to  
> interpret that header."
>
> Lisa
>
> On Oct 27, 2005, at 8:17 PM, Geoffrey M Clemm wrote:
>
>
>>
>> +1
>>
>> w3c-dist-auth-request@w3.org wrote on 10/27/2005 07:50:06 PM:
>>
>>  >
>>  > >
>>  >
>>  > Julian writes:
>>  > > Back to this issue:
>>  > >
>>  > > 1) I'm not aware of any interop problems.
>>  > >
>>  > > 2) I'm not aware of anybody having asked about this.
>>  > >
>>  > > 3) I don't see any benefit in RFC2518bis making statements about
>>  > > this, even if we *did* agree on what to say
>>  >
>>  > I have just read through this entire thread, and I agree with his
>>  > statement above, and the conclusion Julian reached in:
>>  > http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/ 
>> 0294.html
>>  >
>>  > Specifically:
>>  >
>>  > * I don't think there is a compelling need to disallow Location  
>> and 207
>>  > * I don't think we need any special mechanism for handling 3xx  
>> within
>>  > a PROPFIND
>>  > * I think it's fine if a client needs to retry a PROPFIND  
>> request if
>>  > it receives a 3xx response
>>  >
>>  > I feel a slight desire to add a 3xx response to one of the  
>> PROPFIND
>>  > 207 response examples in the text, but could live without it.
>>  >
>>  > Unless others chime in, I think we're seeing rough consensus for
>>  > removing the current 8.1.3, whose text is described in Bug 12  
>> within
>>  > Bugzilla:
>>  > http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=12
>>  >
>>  > - Jim
>>  >
>>  >
>>  >
>>  >
>


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	charset=ISO-8859-1
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<HTML><BODY style=3D"word-wrap: break-word; -khtml-nbsp-mode: space; =
-khtml-line-break: after-white-space; "><DIV><BLOCKQUOTE =
type=3D"cite"><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Helvetica" =
size=3D"3" style=3D"font: 12.0px =
Helvetica"><BR></FONT></DIV></BLOCKQUOTE><DIV>Lisa =
writes:</DIV><BR><BLOCKQUOTE type=3D"cite"><DIV style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT =
face=3D"Helvetica" size=3D"3" style=3D"font: 12.0px Helvetica">However, =
without those pieces of text, the use of the Location header with 207 =
responses becomes undefined, and that always makes me feel =
uncomfortable.<SPAN class=3D"Apple-converted-space">=A0 =A0 =
</SPAN>Server implementors won't know for sure if they can use the =
Location header, it seems logical that it might work but as we've seen =
there are some subtleties in how the client might interpret that.<SPAN =
class=3D"Apple-converted-space">=A0 </SPAN>Clients are probably not =
prepared to handle it.<SPAN class=3D"Apple-converted-space">=A0 =
</SPAN>So I propose that we include text to be clear that the Location =
header SHOULD NOT appear in certain responses. <SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV></BLOCKQUOTE><DIV><=
BR class=3D"khtml-block-placeholder"></DIV><DIV>The HTTP specification =
generally doesn't explain all interactions of methods, headers, and =
response codes. Location only has defined semantics for certain response =
codes in HTTP.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>On the other hand, the HTTP =
spec. isn't necessarily such a paragon of good writing that we should =
strive to emulate it.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>My solution to this issue =
is to add the text:</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>"Use of the Location header =
with the methods and response codes defined in this specification is =
intentionally undefined."</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>And leave it at that. This =
lets clients know they can't depend on the feature, and lets servers =
know they probably shouldn't go there. But, if a later spec. does add =
something here (like a refined REDIRECT spec.), then the door is left =
open for new behavior.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>Can we please close this =
issue?</DIV><DIV><BR class=3D"khtml-block-placeholder"></DIV><DIV>- =
Jim</DIV><BR><BLOCKQUOTE type=3D"cite"><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 12px/normal Helvetica; min-height: 14px; "><BR></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Helvetica" size=3D"3" style=3D"font: =
12.0px Helvetica">I'm sensitive to the worry of preventing extensions =
but surely there's some way of dealing with that.<SPAN =
class=3D"Apple-converted-space">=A0 </SPAN>An extension can override =
"SHOULD" level requirements, or we could come up with some "exception" =
language... as in "servers SHOULD NOT return a Location header in these =
responses unless the client has some way to interpret that =
header."</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
12px/normal Helvetica; min-height: 14px; "><BR></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Helvetica" size=3D"3" style=3D"font: =
12.0px Helvetica">Lisa<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 12px/normal Helvetica; =
min-height: 14px; "><BR></DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT =
face=3D"Helvetica" size=3D"3" style=3D"font: 12.0px Helvetica">On Oct =
27, 2005, at 8:17 PM, Geoffrey M Clemm wrote:</FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 12px/normal Helvetica; =
min-height: 14px; "><BR></DIV> <BR><BLOCKQUOTE type=3D"cite"><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 12px/normal Helvetica; =
min-height: 14px; "><BR></DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT =
face=3D"Helvetica" size=3D"2" style=3D"font: 10.0px =
Helvetica">+1</FONT><FONT face=3D"Helvetica" size=3D"3" style=3D"font: =
12.0px Helvetica"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 12px/normal Helvetica; =
min-height: 14px; "><BR></DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT =
face=3D"Monaco" size=3D"1" style=3D"font: 9.0px Monaco"><A =
href=3D"mailto:w3c-dist-auth-request@w3.org">w3c-dist-auth-request@w3.org<=
/A> wrote on 10/27/2005 07:50:06 PM:</FONT></DIV><DIV style=3D"margin-top:=
 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: =
normal normal normal 12px/normal Helvetica; min-height: 14px; =
"><BR></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; =
&gt;</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; =
Julian writes:</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" =
size=3D"1" style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; &gt; Back to this =
issue:</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; &gt;</FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; &gt; =
1) I'm not aware of any interop problems.</FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; =
&gt;</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; &gt; 2) I'm not aware of =
anybody having asked about this.</FONT></DIV><DIV style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT =
face=3D"Monaco" size=3D"1" style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; &gt;</FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; &gt; =
3) I don't see any benefit in RFC2518bis making statements about =
=A0</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; &gt; this, even if we =
*did* agree on what to say</FONT></DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT =
face=3D"Monaco" size=3D"1" style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; I =
have just read through this entire thread, and I agree with his =
=A0</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; statement above, and the =
conclusion Julian reached in:</FONT></DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT =
face=3D"Monaco" size=3D"1" style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; <A =
href=3D"http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0294.=
html">http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0294.ht=
ml</A></FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; =
Specifically:</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" =
size=3D"1" style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; * I =
don't think there is a compelling need to disallow Location and =
207</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; * I don't think we need =
any special mechanism for handling 3xx within =A0</FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; a =
PROPFIND</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; * I think it's fine if a =
client needs to retry a PROPFIND request if =A0</FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; it =
receives a 3xx response</FONT></DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT =
face=3D"Monaco" size=3D"1" style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; I =
feel a slight desire to add a 3xx response to one of the PROPFIND =
=A0</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; 207 response examples in =
the text, but could live without it.</FONT></DIV><DIV style=3D"margin-top:=
 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT =
face=3D"Monaco" size=3D"1" style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; =
Unless others chime in, I think we're seeing rough consensus for =
=A0</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; removing the current =
8.1.3, whose text is described in Bug 12 within =A0</FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; =
Bugzilla:</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt; <A =
href=3D"http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D12">http:=
//ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D12</A></FONT></DIV><DI=
V style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt; - =
Jim</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" =
style=3D"font: 9.0px Monaco"><SPAN =
class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><FONT face=3D"Monaco" size=3D"1" style=3D"font: =
9.0px Monaco"><SPAN class=3D"Apple-converted-space">=A0</SPAN>&gt;<SPAN =
class=3D"Apple-converted-space">=A0</SPAN></FONT></DIV> </BLOCKQUOTE><BR =
class=3D"Apple-interchange-newline"></BLOCKQUOTE></DIV><BR></BODY></HTML>=

--Apple-Mail-77--243020323--




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From: Jim Whitehead <ejw@soe.ucsc.edu>
Date: Fri, 28 Oct 2005 14:43:45 -0700
To: Julian Reschke <julian.reschke@gmx.de>
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Subject: Re: [Bug 18] no record of consensus for force-authenticate
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>
> I have no problem adding non-normative text explaining this.
>

I'm thinking that the right choice here is to create an appendix  
describing the problem, and the recommended solution(s). While I  
agree that we shouldn't be wily-nilly giving implementation advice,  
this is a common enough problem, whose solution is sufficiently non- 
obvious, that adding appendix text makes sense.

I also think we should add a force-authenticate feature, but I think  
it makes sense to put this in a separate "DAV-fixes" draft. This  
draft can accumulate items like Force-Authenticate, and the reliable  
etags for the body and dead properties, etc. I'll take an action item  
to start creating this draft. I'll make it a private draft, so Cullen  
doesn't have to justify the creation of a new WG item :-)

- Jim




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From: Jim Whitehead <ejw@soe.ucsc.edu>
Date: Fri, 28 Oct 2005 14:47:10 -0700
To: Julian Reschke <julian.reschke@gmx.de>
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Julian,

I'm unclear what changes Lisa needs to make at this point. Are there  
specific figures that are causing a problem?

Also, I don't think it's fair to ding Lisa for using the released  
version of xml2rfc, while you're using the unreleased head of the  
development tree.

- Jim

On Oct 28, 2005, at 12:02 PM, Julian Reschke wrote:

>
> Lisa Dusseault wrote:
>
>> Let me know if the version I uploaded today fixes the "strict"  
>> mode thing, i'm not sure I understand the problem there as I've  
>> had no trouble having xml2rfc run on the document (the version on  
>> the xml.resource.org site is the one I use)
>>
>
> The version I have stops processing when it's run in strict mode,  
> and artwork is too wide (you may want to check out <http:// 
> xml.resource.org/experimental.html>).
>
> Best regards, Julian
>





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--Apple-Mail-13--242384112
Content-Type: text/plain;
	charset=ISO-8859-1;
	delsp=yes;
	format=flowed
Content-Transfer-Encoding: quoted-printable

That's pretty concise and still useful.  I can live with that.

Lisa

On Oct 28, 2005, at 2:38 PM, Jim Whitehead wrote:

>>
> Lisa writes:
>
>> However, without those pieces of text, the use of the Location header =
=20
>> with 207 responses becomes undefined, and that always makes me feel =20=

>> uncomfortable. Server implementors won't know for sure if they can =20=

>> use the Location header, it seems logical that it might work but as =20=

>> we've seen there are some subtleties in how the client might =20
>> interpret that. Clients are probably not prepared to handle it. So I =20=

>> propose that we include text to be clear that the Location header =20
>> SHOULD NOT appear in certain responses.
> The HTTP specification generally doesn't explain all interactions of =20=

> methods, headers, and response codes. Location only has defined =20
> semantics for certain response codes in HTTP.
>
> On the other hand, the HTTP spec. isn't necessarily such a paragon of =20=

> good writing that we should strive to emulate it.
>
> My solution to this issue is to add the text:
>
> "Use of the Location header with the methods and response codes =20
> defined in this specification is intentionally undefined."
>
> And leave it at that. This lets clients know they can't depend on the =20=

> feature, and lets servers know they probably shouldn't go there. But, =20=

> if a later spec. does add something here (like a refined REDIRECT =20
> spec.), then the door is left open for new behavior.
>
> Can we please close this issue?
>
> - Jim
>
>>
>> I'm sensitive to the worry of preventing extensions but surely =20
>> there's some way of dealing with that. An extension can override =20
>> "SHOULD" level requirements, or we could come up with some =20
>> "exception" language... as in "servers SHOULD NOT return a Location =20=

>> header in these responses unless the client has some way to interpret =
=20
>> that header."
>>
>> Lisa
>>
>> On Oct 27, 2005, at 8:17 PM, Geoffrey M Clemm wrote:
>>
>>
>>>
>>> +1
>>>
>>> w3c-dist-auth-request@w3.org wrote on 10/27/2005 07:50:06 PM:
>>>
>>> =A0>
>>> =A0> >
>>> =A0>
>>> =A0> Julian writes:
>>> =A0> > Back to this issue:
>>> =A0> >
>>> =A0> > 1) I'm not aware of any interop problems.
>>> =A0> >
>>> =A0> > 2) I'm not aware of anybody having asked about this.
>>> =A0> >
>>> =A0> > 3) I don't see any benefit in RFC2518bis making statements =
about
>>> =A0> > this, even if we *did* agree on what to say
>>> =A0>
>>> =A0> I have just read through this entire thread, and I agree with =
his
>>> =A0> statement above, and the conclusion Julian reached in:
>>> =A0> =20
>>> http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/=20
>>> 0294.html
>>> =A0>
>>> =A0> Specifically:
>>> =A0>
>>> =A0> * I don't think there is a compelling need to disallow Location =
=20
>>> and 207
>>> =A0> * I don't think we need any special mechanism for handling 3xx =20=

>>> within
>>> =A0> a PROPFIND
>>> =A0> * I think it's fine if a client needs to retry a PROPFIND =
request =20
>>> if
>>> =A0> it receives a 3xx response
>>> =A0>
>>> =A0> I feel a slight desire to add a 3xx response to one of the =20
>>> PROPFIND
>>> =A0> 207 response examples in the text, but could live without it.
>>> =A0>
>>> =A0> Unless others chime in, I think we're seeing rough consensus =
for
>>> =A0> removing the current 8.1.3, whose text is described in Bug 12 =20=

>>> within
>>> =A0> Bugzilla:
>>> =A0> http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D12
>>> =A0>
>>> =A0> - Jim
>>> =A0>
>>> =A0>
>>> =A0>
>>> =A0>

--Apple-Mail-13--242384112
Content-Type: text/enriched;
	charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

That's pretty concise and still useful.  I can live with that.


Lisa


On Oct 28, 2005, at 2:38 PM, Jim Whitehead wrote:


<excerpt><excerpt>

</excerpt>Lisa writes:


<excerpt>However, without those pieces of text, the use of the
Location header with 207 responses becomes undefined, and that always
makes me feel uncomfortable. Server implementors won't know for sure
if they can use the Location header, it seems logical that it might
work but as we've seen there are some subtleties in how the client
might interpret that. Clients are probably not prepared to handle it.
So I propose that we include text to be clear that the Location header
SHOULD NOT appear in certain responses.=20

</excerpt>The HTTP specification generally doesn't explain all
interactions of methods, headers, and response codes. Location only
has defined semantics for certain response codes in HTTP.


On the other hand, the HTTP spec. isn't necessarily such a paragon of
good writing that we should strive to emulate it.


My solution to this issue is to add the text:


"Use of the Location header with the methods and response codes
defined in this specification is intentionally undefined."


And leave it at that. This lets clients know they can't depend on the
feature, and lets servers know they probably shouldn't go there. But,
if a later spec. does add something here (like a refined REDIRECT
spec.), then the door is left open for new behavior.


Can we please close this issue?


- Jim


<excerpt>

I'm sensitive to the worry of preventing extensions but surely there's
some way of dealing with that. An extension can override "SHOULD"
level requirements, or we could come up with some "exception"
language... as in "servers SHOULD NOT return a Location header in
these responses unless the client has some way to interpret that
header."


Lisa=20


On Oct 27, 2005, at 8:17 PM, Geoffrey M Clemm wrote:



<excerpt>

<smaller>+1</smaller>=20


=
<fixed><color><param>0000,0000,EEEE</param><x-tad-smaller>w3c-dist-auth-re=
quest@w3.org</x-tad-smaller></color><x-tad-smaller>
wrote on 10/27/2005 07:50:06 PM:</x-tad-smaller></fixed>


<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> ></x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> Julian writes:</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> > Back to this issue:</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> ></x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> > 1) I'm not aware of any interop =
problems.</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> ></x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> > 2) I'm not aware of anybody having asked
about this.</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> ></x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> > 3) I don't see any benefit in RFC2518bis
making statements about</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> > this, even if we *did* agree on what to =
say</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> I have just read through this entire thread,
and I agree with his</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> statement above, and the conclusion Julian
reached in:</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0>
=
</x-tad-smaller><color><param>0000,0000,EEEE</param><x-tad-smaller>http://=
lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0294.html</x-tad-sma=
ller></color></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> Specifically:</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> * I don't think there is a compelling need to
disallow Location and 207</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> * I don't think we need any special mechanism
for handling 3xx within</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> a PROPFIND</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> * I think it's fine if a client needs to
retry a PROPFIND request if</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> it receives a 3xx =
response</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> I feel a slight desire to add a 3xx response
to one of the PROPFIND</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> 207 response examples in the text, but could
live without it.</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> Unless others chime in, I think we're seeing
rough consensus for</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> removing the current 8.1.3, whose text is
described in Bug 12 within</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> Bugzilla:</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0>
=
</x-tad-smaller><color><param>0000,0000,EEEE</param><x-tad-smaller>http://=
ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D12</x-tad-smaller></colo=
r></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> - Jim</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

</excerpt></excerpt></excerpt>=

--Apple-Mail-13--242384112--





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Subject: Re: Combined set of issues around lock tokens, examples, schemes
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> More changes that I think do not represent WG consensus:
>
> 1: <http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis- 
> latest.html#rfc.section.9.5.3.p.4>:
>
> --
> The Not production is particularly useful with the "<DAV:no-lock>"  
> state token. The clause "Not <DAV:no-lock>" MUST evaluate to true.  
> Thus, any "OR" statement containing the clause "Not <DAV:no-lock>"  
> MUST also evaluate to true.
> --

This sounds right to me.

>
> This now says MUST instead of "must". I'm not sure why RFC2119  
> terminology is invoked here. URIs in the DAV: namespace by  
> definition never represent a lock token, because they can only be  
> assigned by the IETF or this WG. So the statement applies to *all*  
> URIs that use the DAV: URI scheme, "DAV:no-lock" is just one example.
>
> If you really feel that this needs to be stated somewhere, please  
> don't make it sound as if "DAV:no-lock" is different from -- for  
> instance -- "DAV:lock".

I know there was an issue with organizations adding things to the  
DAV: namespace without using the IETF process. However, this section  
doesn't seem like the right place to address this issue.

> 2: <http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis- 
> latest-from-07.diff.html#diff-30>:
>
> Why was the registration for "opaquelocktoken" removed from the  
> IANA considerations? Thinking of it, why was the definition for the  
> "DAV" URI scheme removed as well?????
>

Based on Ted Hardie's email of today, it sounds like these will  
continue to be registered, whether in the IANA considerations section  
or no. That said, it would be useful to have a brief sentence to the  
effect of, "the URI registrations for opaquelocktoken and DAV URI  
schemes made in RFC 2518 should still be considered active."

- Jim





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One thing I noticed when checking this against and editing the text =20
(sometimes this turns up new observations):   We actually use the =20
Location header in response to a MOVE request, in section 8.9.5 of =20
RFC2518.   Yet there's no explanation for this -- the text around the =20=

example doesn't indicate whether the server could have chosen a =20
different destination URL (which seems very harmful to interoperability =20=

to me) or, if not, why the Location header is even needed.

8.9.5 Example - MOVE of a Non-Collection

     This example shows resource
     http://www.ics.uci.edu/~fielding/index.html being moved to the =20
location http://www.ics.uci.edu/users/f/fielding/index.html. The =20
contents of the destination resource would have been overwritten if the =20=

destination resource had been non-null. In this case, since there was =20=

nothing at the destination resource, the response code is 201 =20
(Created).

     >>Request

     MOVE /~fielding/index.html HTTP/1.1
     Host: www.ics.uci.edu
     Destination: http://www.ics.uci.edu/users/f/fielding/index.html

     >>Response

     HTTP/1.1 201 Created
     Location: http://www.ics.uci.edu/users/f/fielding/index.html

----

What if I remove the header from the response example, in addition to =20=

Jim's suggested change?

Lisa


On Oct 28, 2005, at 2:49 PM, Lisa Dusseault wrote:

> That's pretty concise and still useful.  I can live with that.
>
> Lisa
>
> On Oct 28, 2005, at 2:38 PM, Jim Whitehead wrote:
>
>>>
>> Lisa writes:
>>
>>> However, without those pieces of text, the use of the Location =20
>>> header with 207 responses becomes undefined, and that always makes =20=

>>> me feel uncomfortable. Server implementors won't know for sure if =20=

>>> they can use the Location header, it seems logical that it might =20
>>> work but as we've seen there are some subtleties in how the client =20=

>>> might interpret that. Clients are probably not prepared to handle =20=

>>> it. So I propose that we include text to be clear that the Location =20=

>>> header SHOULD NOT appear in certain responses.
>> The HTTP specification generally doesn't explain all interactions of =20=

>> methods, headers, and response codes. Location only has defined =20
>> semantics for certain response codes in HTTP.
>>
>> On the other hand, the HTTP spec. isn't necessarily such a paragon of =
=20
>> good writing that we should strive to emulate it.
>>
>> My solution to this issue is to add the text:
>>
>> "Use of the Location header with the methods and response codes =20
>> defined in this specification is intentionally undefined."
>>
>> And leave it at that. This lets clients know they can't depend on the =
=20
>> feature, and lets servers know they probably shouldn't go there. But, =
=20
>> if a later spec. does add something here (like a refined REDIRECT =20
>> spec.), then the door is left open for new behavior.
>>
>> Can we please close this issue?
>>
>> - Jim
>>
>>>
>>> I'm sensitive to the worry of preventing extensions but surely =20
>>> there's some way of dealing with that. An extension can override =20
>>> "SHOULD" level requirements, or we could come up with some =20
>>> "exception" language... as in "servers SHOULD NOT return a Location =20=

>>> header in these responses unless the client has some way to =20
>>> interpret that header."
>>>
>>> Lisa
>>>
>>> On Oct 27, 2005, at 8:17 PM, Geoffrey M Clemm wrote:
>>>
>>>
>>>>
>>>> +1
>>>>
>>>> w3c-dist-auth-request@w3.org wrote on 10/27/2005 07:50:06 PM:
>>>>
>>>> =A0>
>>>> =A0> >
>>>> =A0>
>>>> =A0> Julian writes:
>>>> =A0> > Back to this issue:
>>>> =A0> >
>>>> =A0> > 1) I'm not aware of any interop problems.
>>>> =A0> >
>>>> =A0> > 2) I'm not aware of anybody having asked about this.
>>>> =A0> >
>>>> =A0> > 3) I don't see any benefit in RFC2518bis making statements =20=

>>>> about
>>>> =A0> > this, even if we *did* agree on what to say
>>>> =A0>
>>>> =A0> I have just read through this entire thread, and I agree with =
his
>>>> =A0> statement above, and the conclusion Julian reached in:
>>>> =A0> =20
>>>> http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/=20
>>>> 0294.html
>>>> =A0>
>>>> =A0> Specifically:
>>>> =A0>
>>>> =A0> * I don't think there is a compelling need to disallow =
Location =20
>>>> and 207
>>>> =A0> * I don't think we need any special mechanism for handling 3xx =
=20
>>>> within
>>>> =A0> a PROPFIND
>>>> =A0> * I think it's fine if a client needs to retry a PROPFIND =20
>>>> request if
>>>> =A0> it receives a 3xx response
>>>> =A0>
>>>> =A0> I feel a slight desire to add a 3xx response to one of the =20
>>>> PROPFIND
>>>> =A0> 207 response examples in the text, but could live without it.
>>>> =A0>
>>>> =A0> Unless others chime in, I think we're seeing rough consensus =
for
>>>> =A0> removing the current 8.1.3, whose text is described in Bug 12 =20=

>>>> within
>>>> =A0> Bugzilla:
>>>> =A0> http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D12
>>>> =A0>
>>>> =A0> - Jim
>>>> =A0>
>>>> =A0>
>>>> =A0>
>>>> =A0>

--Apple-Mail-14--241825482
Content-Type: text/enriched;
	charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

One thing I noticed when checking this against and editing the text
(sometimes this turns up new observations):   We actually use the
Location header in response to a MOVE request, in section 8.9.5 of
RFC2518.   Yet there's no explanation for this -- the text around the
example doesn't indicate whether the server could have chosen a
different destination URL (which seems very harmful to
interoperability to me) or, if not, why the Location header is even
needed.


8.9.5 Example - MOVE of a Non-Collection


    This example shows resource

    http://www.ics.uci.edu/~fielding/index.html being moved to the
location http://www.ics.uci.edu/users/f/fielding/index.html. The
contents of the destination resource would have been overwritten if
the destination resource had been non-null. In this case, since there
was nothing at the destination resource, the response code is 201
(Created).


    >>Request


    MOVE /~fielding/index.html HTTP/1.1

    Host: www.ics.uci.edu

    Destination: http://www.ics.uci.edu/users/f/fielding/index.html


    >>Response


    HTTP/1.1 201 Created

    Location: http://www.ics.uci.edu/users/f/fielding/index.html


----


What if I remove the header from the response example, in addition to
Jim's suggested change?


Lisa



On Oct 28, 2005, at 2:49 PM, Lisa Dusseault wrote:


<excerpt>That's pretty concise and still useful.  I can live with that.


Lisa


On Oct 28, 2005, at 2:38 PM, Jim Whitehead wrote:


<excerpt><excerpt>

</excerpt>Lisa writes:


<excerpt>However, without those pieces of text, the use of the
Location header with 207 responses becomes undefined, and that always
makes me feel uncomfortable. Server implementors won't know for sure
if they can use the Location header, it seems logical that it might
work but as we've seen there are some subtleties in how the client
might interpret that. Clients are probably not prepared to handle it.
So I propose that we include text to be clear that the Location header
SHOULD NOT appear in certain responses.=20

</excerpt>The HTTP specification generally doesn't explain all
interactions of methods, headers, and response codes. Location only
has defined semantics for certain response codes in HTTP.


On the other hand, the HTTP spec. isn't necessarily such a paragon of
good writing that we should strive to emulate it.


My solution to this issue is to add the text:


"Use of the Location header with the methods and response codes
defined in this specification is intentionally undefined."


And leave it at that. This lets clients know they can't depend on the
feature, and lets servers know they probably shouldn't go there. But,
if a later spec. does add something here (like a refined REDIRECT
spec.), then the door is left open for new behavior.


Can we please close this issue?


- Jim


<excerpt>

I'm sensitive to the worry of preventing extensions but surely there's
some way of dealing with that. An extension can override "SHOULD"
level requirements, or we could come up with some "exception"
language... as in "servers SHOULD NOT return a Location header in
these responses unless the client has some way to interpret that
header."


Lisa=20


On Oct 27, 2005, at 8:17 PM, Geoffrey M Clemm wrote:



<excerpt>

<smaller>+1</smaller>=20


=
<fixed><color><param>0000,0000,EEED</param><x-tad-smaller>w3c-dist-auth-re=
quest@w3.org</x-tad-smaller></color><x-tad-smaller>
wrote on 10/27/2005 07:50:06 PM:</x-tad-smaller></fixed>


<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> ></x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> Julian writes:</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> > Back to this issue:</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> ></x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> > 1) I'm not aware of any interop =
problems.</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> ></x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> > 2) I'm not aware of anybody having asked
about this.</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> ></x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> > 3) I don't see any benefit in RFC2518bis
making statements about</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> > this, even if we *did* agree on what to =
say</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> I have just read through this entire thread,
and I agree with his</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> statement above, and the conclusion Julian
reached in:</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0>
=
</x-tad-smaller><color><param>0000,0000,EEED</param><x-tad-smaller>http://=
lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0294.html</x-tad-sma=
ller></color></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> Specifically:</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> * I don't think there is a compelling need to
disallow Location and 207</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> * I don't think we need any special mechanism
for handling 3xx within</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> a PROPFIND</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> * I think it's fine if a client needs to
retry a PROPFIND request if</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> it receives a 3xx =
response</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> I feel a slight desire to add a 3xx response
to one of the PROPFIND</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> 207 response examples in the text, but could
live without it.</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> Unless others chime in, I think we're seeing
rough consensus for</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> removing the current 8.1.3, whose text is
described in Bug 12 within</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> Bugzilla:</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0>
=
</x-tad-smaller><color><param>0000,0000,EEED</param><x-tad-smaller>http://=
ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=3D12</x-tad-smaller></colo=
r></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> - Jim</x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

<fixed><x-tad-smaller>=A0> </x-tad-smaller></fixed>

</excerpt></excerpt></excerpt></excerpt>=

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On Oct 28, 2005, at 2:51 PM, Jim Whitehead wrote:

> URI registrations for opaquelocktoken and DAV URI schemes made in RFC 
> 2518 should still be considered active."
>

While looking at the IANA considerations section, this text caught my 
eye:

    This document defines two namespaces, the namespace of property
    names, and the namespace of WebDAV-specific XML elements used within
    property values.

I don't count two namespace, just one (DAV:).  any objections if I fix 
this sentence?

Lisa





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> If the working group wants people to propose ready-for-spec text,  
> then I think that text should either be used, or those you don't  
> like it should at least state what was wrong with it.

I don't think the editor should have to defend every minor text  
change. In particular, I think some of Lisa's additions are good (and  
she caught one error in the ABNF that you missed). However, you did  
catch a few minor errors, and one case of overspecification. Gee,  
it's almost like when multiple people collaborate on a document, the  
final result is of higher quality :-)

>
> For the record, I proposed:
>
>  Appendix C.  'opaquelocktoken' URI Scheme
>
>    The 'opaquelocktoken' URI scheme defined below uses the Universal
>    Unique Identifier (UUID) mechanism ([9], Section 4) to easily
>    generate lock tokens fulfilling the uniqueness requirements  
> stated in
>    Section 6.3.
>
>      OpaqueLockToken-URI = "opaquelocktoken:" UUID [path]
>      ; UUID: see [RFC4122], Section 3.
>      ; path: see [RFC3986], Section 3.3.
>
>    Note that the optional "path" postfix allows to generate many lock
>    tokens from a single URI, by appending an varying string such as a
>    sequence number.
>
>    Example:
>
>      opaquelocktoken:f81de2ad-7f3d-a1b2-4f3c-00a0c91a9d76-0017

I like this text, but I think Lisa does have some valuable  
contributions.

Lisa's note about LWS is necessary, since otherwise you could have  
any amount of LWS between "opaquelocktoken:" and UUID and [path].

I also generally like Lisa's new introduction sentence, since it  
provides a modicum of context for the appendix.

I'd tweak the introduction sentence slightly:

The 'opaquelocktoken' URI scheme can be used by servers to create  
syntactically correct and easy-to-generate URIs out of UUIDs,  
intended to be used as lock tokens, meeting the requirements for  
uniqueness across all resources for all time.

>    A server MAY generate one ore more UUIDs to use with the
>    'opaquelocktoken' scheme as lock tokens.  A server MAY reuse a UUID
>    with extension characters added.  If the server does this then the
>    algorithm generating the extensions MUST guarantee that the same
>    extension will never be used twice with the associated UUID.

This is implicit in the ABNF definition for opaquelocktoken, and  
doesn't need to be stated.


>
>    OpaqueLockToken-URI = "opaquelocktoken:" UUID [Extension]  ; The  
> UUID
>    production is the string representation of a UUID.  Note that white
>    space (LWS) is not allowed between elements of this production.

For this section, I recommend:

OpaqueLockToken-URI = "opaquelocktoken:" UUID [path]
    ; UUID: see [RFC4122], Section 3.
    ; path: see [RFC3986], Section 3.3.
Note that white space (LWS) is not allowed between elements of this  
production.


> - no, opaquelocktoken has *not* been obsoleted; it still does more  
> that urn:uuid does
>

I agree.


>
> - "If the server does this then the algorithm generating the  
> extensions MUST guarantee that the same extension will never be  
> used twice with the associated UUID." - that's by definition of the  
> lock token uniqueness; I'm not sure why it's repeated here.

I agree.

>
> - "OpaqueLockToken-URI = "opaquelocktoken:" UUID  
> [Extension]  ; ..." -- just refer to the normative definition in  
> RFC4122

I agree.

>
> - "Extension = path"... -- RFC2396 is obsoleted. Really :-)

I agree.

- Jim

--Apple-Mail-78--241272097
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<HTML><BODY style=3D"word-wrap: break-word; -khtml-nbsp-mode: space; =
-khtml-line-break: after-white-space; "><DIV><BLOCKQUOTE =
type=3D"cite"><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">If the working group wants =
people to propose ready-for-spec text, then I think that text should =
either be used, or those you don't like it should at least state what =
was wrong with it.</DIV></BLOCKQUOTE><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>I don't think the editor =
should have to defend every minor text change. In particular, I think =
some of Lisa's additions are good (and she caught one error in the ABNF =
that you missed). However, you did catch a few minor errors, and one =
case of overspecification. Gee, it's almost like when multiple people =
collaborate on a document, the final result is of higher quality =
:-)</DIV><BR><BLOCKQUOTE type=3D"cite"><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: =
14px; "><BR></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">For the record, I =
proposed:</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><SPAN class=3D"Apple-converted-space">=A0</SPAN>Append=
ix C.<SPAN class=3D"Apple-converted-space">=A0 </SPAN>'opaquelocktoken' =
URI Scheme</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><SPAN class=3D"Apple-converted-space">=A0=A0 =
</SPAN>The 'opaquelocktoken' URI scheme defined below uses the =
Universal</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 </SPAN>Unique Identifier (UUID) =
mechanism ([9], Section 4) to easily</DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 </SPAN>generate lock tokens =
fulfilling the uniqueness requirements stated in</DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><SPAN class=3D"Apple-converted-space">=A0=A0 =
</SPAN>Section 6.3.</DIV><DIV style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; =
"><BR></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 =A0 </SPAN>OpaqueLockToken-URI =3D =
"opaquelocktoken:" UUID [path]</DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 =A0 </SPAN>; UUID: see [RFC4122], =
Section 3.</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 =A0 </SPAN>; path: see [RFC3986], =
Section 3.3.</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><SPAN class=3D"Apple-converted-space">=A0=A0 =
</SPAN>Note that the optional "path" postfix allows to generate many =
lock</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 </SPAN>tokens from a single URI, =
by appending an varying string such as a</DIV><DIV style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 </SPAN>sequence number.</DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 </SPAN>Example:</DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 =A0 =
</SPAN>opaquelocktoken:f81de2ad-7f3d-a1b2-4f3c-00a0c91a9d76-0017</DIV></BL=
OCKQUOTE><DIV><BR class=3D"khtml-block-placeholder"></DIV><DIV>I like =
this text, but I think Lisa does have some valuable =
contributions.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>Lisa's=A0note about LWS is =
necessary, since otherwise you could have any amount of LWS between =
"opaquelocktoken:" and UUID and [path].</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>I also generally like =
Lisa's new introduction sentence, since it provides a modicum of context =
for the appendix.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>I'd tweak the introduction =
sentence slightly:</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>The 'opaquelocktoken' URI =
scheme can be used by servers to create syntactically correct and =
easy-to-generate URIs out of UUIDs, intended to be used as lock tokens, =
meeting the requirements for uniqueness across all resources for all =
time.=A0</DIV><BLOCKQUOTE type=3D"cite"></BLOCKQUOTE><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><BLOCKQUOTE type=3D"cite"><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><SPAN class=3D"Apple-converted-space">=A0 =A0</SPAN>A =
server MAY generate one ore more UUIDs to use with the</DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; "><SPAN class=3D"Apple-converted-space">=A0=A0 =
</SPAN>'opaquelocktoken' scheme as lock tokens.<SPAN =
class=3D"Apple-converted-space">=A0 </SPAN>A server MAY reuse a =
UUID</DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 </SPAN>with extension characters =
added.<SPAN class=3D"Apple-converted-space">=A0 </SPAN>If the server =
does this then the</DIV><DIV style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 </SPAN>algorithm generating the =
extensions MUST guarantee that the same</DIV><DIV style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 </SPAN>extension will never be =
used twice with the associated UUID.</DIV></BLOCKQUOTE><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>This is implicit in the =
ABNF definition for opaquelocktoken, and doesn't need to be =
stated.=A0</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><BR><BLOCKQUOTE type=3D"cite"><DIV=
 style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 </SPAN>OpaqueLockToken-URI =3D =
"opaquelocktoken:" UUID [Extension]<SPAN class=3D"Apple-converted-space">=A0=
 </SPAN>; The UUID</DIV><DIV style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 </SPAN>production is the string =
representation of a UUID.<SPAN class=3D"Apple-converted-space">=A0 =
</SPAN>Note that white</DIV><DIV style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; "><SPAN =
class=3D"Apple-converted-space">=A0=A0 </SPAN>space (LWS) is not allowed =
between elements of this production.</DIV></BLOCKQUOTE><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>For this section, I =
recommend:</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>OpaqueLockToken-URI =3D =
"opaquelocktoken:" UUID [path]</DIV><DIV>=A0 =A0; UUID: see [RFC4122], =
Section 3.</DIV><DIV>=A0 =A0; path: see [RFC3986], Section =
3.3.</DIV><DIV>Note that white=A0space (LWS) is not allowed between =
elements of this production.</DIV><BLOCKQUOTE =
type=3D"cite"></BLOCKQUOTE><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><BLOCKQUOTE type=3D"cite"><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; ">- no, opaquelocktoken has *not* been obsoleted; it =
still does more that <A href=3D"urn:uuid">urn:uuid</A> does</DIV><DIV =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; min-height: 14px; "><BR></DIV></BLOCKQUOTE><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>I =
agree.=A0</DIV><BR><BR><BLOCKQUOTE type=3D"cite"><DIV style=3D"margin-top:=
 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; =
min-height: 14px; "><BR></DIV><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">- "If the =
server does this then the algorithm generating the extensions MUST =
guarantee that the same extension will never be used twice with the =
associated UUID." - that's by definition of the lock token uniqueness; =
I'm not sure why it's repeated here.</DIV></BLOCKQUOTE><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>I =
agree.</DIV><BR><BLOCKQUOTE type=3D"cite"><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: =
14px; "><BR></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">- "OpaqueLockToken-URI =3D =
"opaquelocktoken:" UUID [Extension]<SPAN class=3D"Apple-converted-space">=A0=
 </SPAN>; ..." -- just refer to the normative definition in =
RFC4122</DIV></BLOCKQUOTE><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>I =
agree.</DIV><BR><BLOCKQUOTE type=3D"cite"><DIV style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: =
14px; "><BR></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; ">- "Extension =3D path"... -- =
RFC2396 is obsoleted. Really :-)</DIV></BLOCKQUOTE></DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD">I =
agree.</FONT></DIV><DIV><FONT class=3D"Apple-style-span" =
color=3D"#0000DD"><BR =
class=3D"khtml-block-placeholder"></FONT></DIV><DIV><FONT =
class=3D"Apple-style-span" color=3D"#0000DD">- =
Jim</FONT></DIV><DIV><FONT class=3D"Apple-style-span" =
color=3D"#0000DD"></FONT></DIV></BODY></HTML>=

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Subject: Re: [Bug 12] Destination header "consistent"
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--Apple-Mail-79--240941015
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> What if I remove the header from the response example, in addition  
> to Jim's suggested change?
>

Urk, bad idea.

The use of Location with MOVE is to be consistent with the semantics  
of the 201 response code.

So, the suggested text has to be more precise. Perhaps:

"The use of the Location header with the 207 status code is  
intentionally undefined."

However, even this I'm starting to feel is a bad idea. Why do we stop  
at Location? Why not create a table with all HTTP headers and state  
whether they should be used with 207?

- Jim
--Apple-Mail-79--240941015
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<HTML><BODY style=3D"word-wrap: break-word; -khtml-nbsp-mode: space; =
-khtml-line-break: after-white-space; "><DIV><BLOCKQUOTE =
type=3D"cite"><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; "><FONT face=3D"Helvetica" =
size=3D"3" style=3D"font: 12.0px Helvetica">What if I remove the header =
from the response example, in addition to Jim's suggested =
change?</FONT></DIV><DIV style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
12px/normal Helvetica; min-height: 14px; =
"><BR></DIV></BLOCKQUOTE><BR></DIV><DIV>Urk, bad idea.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>The use of Location with =
MOVE is to be consistent with the semantics of the 201 response =
code.</DIV><DIV><BR class=3D"khtml-block-placeholder"></DIV><DIV>So, the =
suggested text has to be more precise. Perhaps:</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>"The use of the Location =
header with the 207 status code is intentionally =
undefined."</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>However, even this I'm =
starting to feel is a bad idea. Why do we stop at Location? Why not =
create a table with all HTTP headers and state whether they should be =
used with 207?</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>- Jim</DIV></BODY></HTML>=

--Apple-Mail-79--240941015--




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From: Lisa Dusseault <lisa@osafoundation.org>
Date: Fri, 28 Oct 2005 15:23:34 -0700
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Subject: Re: [Bug 12] Destination header "consistent"
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On Oct 28, 2005, at 3:13 PM, Jim Whitehead wrote:

>> What if I remove the header from the response example, in addition to 
>> Jim's suggested change?
>>
>
> Urk, bad idea.
>
> The use of Location with MOVE is to be consistent with the semantics 
> of the 201 response code.

I read this a little differently than you -- I don't see that Location 
is REQUIRED with the 201 response code.  So I don't see a problem with 
leaving it out of a 201 Created response to a MOVE, but I'm not adamant 
either way.

>
> So, the suggested text has to be more precise. Perhaps:
>
> "The use of the Location header with the 207 status code is 
> intentionally undefined."
>
> However, even this I'm starting to feel is a bad idea. Why do we stop 
> at Location? Why not create a table with all HTTP headers and state 
> whether they should be used with 207?
>
Indeed.  It's certainly more work, but this kind of thing can be 
extremely valuable to implementors. As we can see from the discussion 
over the list of response codes that could and couldn't be used in 207 
responses, it's a fine line to walk and quite possible to overspecify.  
Perhaps if we had a table where many of the cell values were simply 
"undefined" instead of "MUST NOT use" we'd have a better compromise...

Lisa





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On Oct 28, 2005, at 3:13 PM, Jim Whitehead wrote:

>> What if I remove the header from the response example, in addition to 
>> Jim's suggested change?
>>
>
> Urk, bad idea.
>
> The use of Location with MOVE is to be consistent with the semantics 
> of the 201 response code.
>
Tacking on to my previous comment where I said I didn't think Location 
was REQUIRED with 201...  note that in RFC2518, we had an example of 
MKCOL, where the response was 201 Created without a Location header:

8.3.3 Example - MKCOL

     This example creates a collection called /webdisc/xfiles/ on the 
server www.server.org.

     >>Request

     MKCOL /webdisc/xfiles/ HTTP/1.1
     Host: www.server.org

     >>Response

     HTTP/1.1 201 Created


-- Lisa





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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=12





------- Additional Comments From lisa@osafoundation.org  2005-10-28 15:27 -------
We seemed to have agreement to remove 8.1.3, along with other mentions of using
the Location header or <location> element along with or inside 207 Multi-Status
responses.  (Instead, if the server has a new/changed location for a resource,
the 3xx level response can be used and the client would probably reissue the
request).  

Along the way we've noticed another couple sub-issues, like what text to add
about the Location header and 207 (Jim suggested explicitly leaving its
interaction undefined).



------- You are receiving this mail because: -------
You are the QA contact for the bug, or are watching the QA contact.




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On Oct 27, 2005, at 10:58 AM, Elias Sinderson wrote:

>
> Julian Reschke wrote:
>
>> Proposed resolution for 
>> <http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23>: [...]
>> NEW:
>>    A lock token is a type of state token, represented as a URI, which
>>    identifies a particular lock.  Each lock has exactly one unique 
>> lock
>>    token, which is returned upon a successful LOCK creation operation 
>> in
>>    the "Lock-Token" response header defined in Section 9.6.
>
> I have no issues with the proposed text.
>
>
> Cheers,
> Elias
>
>
It's not just the Lock-Token response header that shows the lock token 
in response to LOCK, the token also appears in the lockdiscovery 
property value, which is included in the body of the LOCK response.   
There's a couple issues that the section on lock tokens should address:
  - how lock tokens relate to locks (one and only one)
  - who generates them, how, and requirements (uniqueness, that clients 
MUST not interpret)
  - where to get them (Lock-Token response, lockdiscovery property)

So here's the (work-in-progress) text for the whole section on lock 
tokens, including my attempts to incorporate several bits of suggested 
text in a readable order, while also being complete:

----

  A lock token is a type of state token, represented as a URI, which 
identifies a particular lock. Each lock has exactly one unique lock 
token generated by the server. Clients MUST NOT attempt to interpret 
lock tokens in any way.

Lock token URIs MUST be unique across all resources for all time. This 
uniqueness constraint allows lock tokens to be submitted across 
resources and servers without fear of confusion.

When a LOCK operation creates a new lock, the new lock token is 
returned in the Lock-Token response header defined in Section 9.6 
(Lock-Token Header), and also in the body of the response. Also note 
that lock tokens MUST appear in the 'lockdiscovery' property of a 
locked resource.

Submitting a lock token does not confer full privilege to use the lock 
token or modify the locked resource. Anyone can find out anyone else's 
lock token by performing lock discovery. Write access and other 
privileges MUST be enforced through normal privilege or authentication 
mechanisms, not based on the slight obscurity of lock token values.

Since lock tokens are unique, a client MAY submit a lock token in an If 
header on a resource other than the one that returned it.

This specification encourages servers to create UUIDs for lock tokens, 
and to use the URI form defined by Universal Unique Identifier (UUID)  
[9]. However servers are free to use another valid URI so long as it 
meets the uniqueness requirements. For example, a valid lock token 
might be constructed using the "opaquelocktoken" scheme defined in an 
appendix of this document.

Example: "urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6"

----

There were some comments in a previous email from Julian about how the 
lock token might not appear in the 'lockdiscovery' property if there 
are multiple (shared) locks on the resource.  This statement doesn't 
fit my understanding, so I haven't yet "fixed" that if I am indeed 
wrong.  Doesn't the 'lockdiscovery' property include every active lock 
on the resource and all their lock tokens?

Lisa

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On Oct 27, 2005, at 10:58 AM, Elias Sinderson wrote:


<excerpt>

Julian Reschke wrote:


<excerpt>Proposed resolution for
<<http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23>: [...]

NEW:

   A lock token is a type of state token, represented as a URI, which

   identifies a particular lock.  Each lock has exactly one unique lock

   token, which is returned upon a successful LOCK creation operation
in

   the "Lock-Token" response header defined in Section 9.6.

</excerpt>

I have no issues with the proposed text.



Cheers,

Elias



</excerpt>It's not just the Lock-Token response header that shows the
lock token in response to LOCK, the token also appears in the
lockdiscovery property value, which is included in the body of the
LOCK response.   There's a couple issues that the section on lock
tokens should address:

 - how lock tokens relate to locks (one and only one) 

 - who generates them, how, and requirements (uniqueness, that clients
MUST not interpret)

 - where to get them (Lock-Token response, lockdiscovery property)


So here's the (work-in-progress) text for the whole section on lock
tokens, including my attempts to incorporate several bits of suggested
text in a readable order, while also being complete:


---- 


<fontfamily><param>Courier</param> A lock token is a type of state
token, represented as a URI, which identifies a particular lock. Each
lock has exactly one unique lock token generated by the server.
Clients MUST NOT attempt to interpret lock tokens in any way.


Lock token URIs MUST be unique across all resources for all time. This
uniqueness constraint allows lock tokens to be submitted across
resources and servers without fear of confusion.


When a LOCK operation creates a new lock, the new lock token is
returned in the Lock-Token response header defined in Section 9.6
(Lock-Token Header), and also in the body of the response. Also note
that lock tokens MUST appear in the 'lockdiscovery' property of a
locked resource.


Submitting a lock token does not confer full privilege to use the lock
token or modify the locked resource. Anyone can find out anyone else's
lock token by performing lock discovery. Write access and other
privileges MUST be enforced through normal privilege or authentication
mechanisms, not based on the slight obscurity of lock token values.


Since lock tokens are unique, a client MAY submit a lock token in an
If header on a resource other than the one that returned it.


This specification encourages servers to create UUIDs for lock tokens,
and to use the URI form defined by Universal Unique Identifier (UUID) 
[9]. However servers are free to use another valid URI so long as it
meets the uniqueness requirements. For example, a valid lock token
might be constructed using the "opaquelocktoken" scheme defined in an
appendix of this document.


Example: "urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6"</fontfamily>


----


There were some comments in a previous email from Julian about how the
lock token might not appear in the 'lockdiscovery' property if there
are multiple (shared) locks on the resource.  This statement doesn't
fit my understanding, so I haven't yet "fixed" that if I am indeed
wrong.  Doesn't the 'lockdiscovery' property include every active lock
on the resource and all their lock tokens? 


Lisa


--Apple-Mail-15--238806442--





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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23





------- Additional Comments From lisa@osafoundation.org  2005-10-28 15:50 -------
I don't understand the issue of shared locks and lockdiscovery -- I thought that
all active locks had to show up in lockdiscovery, along with their tokens.

I am fine with "has exactly one" and have made that change in local copy.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=24

lisa@osafoundation.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED



------- Additional Comments From lisa@osafoundation.org  2005-10-28 16:14 -------
I believe we've come to consensus on this one, and I've updated local copy, so I
believe this is fixed.



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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=18





------- Additional Comments From geoffrey.clemm@us.ibm.com  2005-10-28 19:50 -------
What does this do that the "Expect 100-continue" header already defined by HTTP 
doesn't already do?




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To avoid sending the PUT body twice, why can't a client just
use the standard HTTP "Expect 100-Continue" header?

And if a client is proactively checking for authentication preceding
a series of PUT calls, then having it just perform an initial LOCK/UNLOCK
to get the credential challenge doesn't seem like an unreasonable overhead
(2 initial requests).

So is this just a technique for servers that want to provide this
capability but don't want to support LOCK? 

Cheers,
Geoff

Jim wrote on 10/27/2005 08:34:39 PM:
> 
> >
> 
> Julian writes:
> 
> > So this is a process issue -- if it's supposed to become part of 
> > WebDAV, it has to make it through the process of (1) define what 
> > the problem is, then (2) find a WG consensus of how to resolve 
> > this. "Force-Authenticate" may very well be the solution.
> 
> OK, I feel pretty strongly about this feature, so let me do the due 
> diligence here.
> 
> PROBLEM STATEMENT
> 
> Some WebDAV servers are configured to allow live authoring, where the 
> authored changes are immediately visible to the external world. In 
> this situation, resources typically have access controls set such 
> that GET, HEAD, POST, PROPFIND and OPTIONS can be performed by any 
> user without authentication. Write operations such as PUT, LOCK, 
> UNLOCK, MKCOL, MOVE, and COPY require authentication and access 
> permissions. In some cases, a client would do a series of operations 
> that do not require authentication, then perform a PUT of a large 
> resource (this can happen with the common Microsoft Web Folders 
> client). In this situation, the large resource body needs to be sent 
> twice: the initial PUT (which gets a 401 response), and the second 
> PUT, with authentication credentials.
> 
> Ideally, a client would like to test a resource to see whether it 
> should ever send authentication credentials. It is far more 
> convenient for a client author to make a single test at the beginning 
> of a session, discover that some methods will require authentication 
> credentials, and then consistently supply those authentication 
> credentials for every method invocation thereafter. Since a client 
> does not know which authentication scheme is in use, or what nonce 
> values will be used in Digest Auth, it cannot speculatively provide 
> authentication values without receiving a challenge (401) from the 
> server first. While in general it is the case that authentication 
> requirements can vary by method, even on the same resource, this 
> configuration is extremely unusual. Hence, a client that proactively 
> supplies a set of authentication credentials gathered from testing 
> one method that requires authentication (PUT, say), will likely find 
> that these same authentication credentials will work for all other 
> methods (LOCK, UNLOCK, etc.) on the same resource that also require 
> authentication.
> 
> SOLUTION REQUIREMENTS
> 
> R1: A client must be able to request an authentication challenge 
> without causing a state change on the server
> R2:  The mechanism for the authentication challenge must be clearly 
> identifiable within the specification
> R3: The client must be able to indicate which method the challenge 
> pertains to (since this can potentially vary by method, though it 
> usually doesn't)
> 
> SOLUTION PROPOSAL
> 
> I like the Force-Authenticate header as defined in the current draft. 
> I don't like the If approach (submit an If header with a known bad 
> lock token, hence the method will fail) for three reasons:
> 
> * I feel uncomfortable depending on an unintended use of the If 
> header -- especially for PUT, if a server ever doesn't handle If 
> correctly, the forcing of authentication could inadvertently change 
> the contents of the resource (assuming you'd force authentication 
> with a zero length body with PUT)
> * It depends on the execution order of authentication vs. If header 
> processing within servers (I note this was rebutted in:
> http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/ 
> 0335.html  and I also note that mod_dav does do authentication checks 
> before If checks)
> * It's a really obscure way of satisfying the requirements (i.e., it 
> fails requirement R2)
> 
> 
> My strong preference is for a new mechanism here (Force- 
> Authenticate), though I could perhaps be swayed to adding a new 
> section to the specification that explicitly describes the use of If 
> to force authentication, and gives an example of how this works. I 
> don't think this mechanism is one that most implementors would think 
> of, even if the have a deep understanding of the spec (like, me, for 
> example, who never thought of this).
> 
> - Jim
> 
> 
> 
> 
> 
> 
> 

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<br><font size=2><tt>To avoid sending the PUT body twice, why can't a client
just</tt></font>
<br><font size=2><tt>use the standard HTTP &quot;Expect 100-Continue&quot;
header?</tt></font>
<br>
<br><font size=2><tt>And if a client is proactively checking for authentication
preceding</tt></font>
<br><font size=2><tt>a series of PUT calls, then having it just perform
an initial LOCK/UNLOCK</tt></font>
<br><font size=2><tt>to get the credential challenge doesn't seem like
an unreasonable overhead</tt></font>
<br><font size=2><tt>(2 initial requests).</tt></font>
<br>
<br><font size=2><tt>So is this just a technique for servers that want
to provide this</tt></font>
<br><font size=2><tt>capability but don't want to support LOCK? &nbsp;</tt></font>
<br>
<br><font size=2><tt>Cheers,<br>
Geoff</tt></font>
<br>
<br><font size=2><tt>Jim wrote on 10/27/2005 08:34:39 PM:<br>
&gt; <br>
&gt; &gt;<br>
&gt; <br>
&gt; Julian writes:<br>
&gt; <br>
&gt; &gt; So this is a process issue -- if it's supposed to become part
of &nbsp;<br>
&gt; &gt; WebDAV, it has to make it through the process of (1) define what
&nbsp;<br>
&gt; &gt; the problem is, then (2) find a WG consensus of how to resolve
&nbsp;<br>
&gt; &gt; this. &quot;Force-Authenticate&quot; may very well be the solution.<br>
&gt; <br>
&gt; OK, I feel pretty strongly about this feature, so let me do the due
&nbsp;<br>
&gt; diligence here.<br>
&gt; <br>
&gt; PROBLEM STATEMENT<br>
&gt; <br>
&gt; Some WebDAV servers are configured to allow live authoring, where
the &nbsp;<br>
&gt; authored changes are immediately visible to the external world. In
&nbsp;<br>
&gt; this situation, resources typically have access controls set such
&nbsp;<br>
&gt; that GET, HEAD, POST, PROPFIND and OPTIONS can be performed by any
&nbsp;<br>
&gt; user without authentication. Write operations such as PUT, LOCK, &nbsp;<br>
&gt; UNLOCK, MKCOL, MOVE, and COPY require authentication and access &nbsp;<br>
&gt; permissions. In some cases, a client would do a series of operations
&nbsp;<br>
&gt; that do not require authentication, then perform a PUT of a large
&nbsp;<br>
&gt; resource (this can happen with the common Microsoft Web Folders &nbsp;<br>
&gt; client). In this situation, the large resource body needs to be sent
&nbsp;<br>
&gt; twice: the initial PUT (which gets a 401 response), and the second
&nbsp;<br>
&gt; PUT, with authentication credentials.<br>
&gt; <br>
&gt; Ideally, a client would like to test a resource to see whether it
&nbsp;<br>
&gt; should ever send authentication credentials. It is far more &nbsp;<br>
&gt; convenient for a client author to make a single test at the beginning
&nbsp;<br>
&gt; of a session, discover that some methods will require authentication
&nbsp;<br>
&gt; credentials, and then consistently supply those authentication &nbsp;<br>
&gt; credentials for every method invocation thereafter. Since a client
&nbsp;<br>
&gt; does not know which authentication scheme is in use, or what nonce
&nbsp;<br>
&gt; values will be used in Digest Auth, it cannot speculatively provide
&nbsp;<br>
&gt; authentication values without receiving a challenge (401) from the
&nbsp;<br>
&gt; server first. While in general it is the case that authentication
&nbsp;<br>
&gt; requirements can vary by method, even on the same resource, this &nbsp;<br>
&gt; configuration is extremely unusual. Hence, a client that proactively
&nbsp;<br>
&gt; supplies a set of authentication credentials gathered from testing
&nbsp;<br>
&gt; one method that requires authentication (PUT, say), will likely find
&nbsp;<br>
&gt; that these same authentication credentials will work for all other
&nbsp;<br>
&gt; methods (LOCK, UNLOCK, etc.) on the same resource that also require
&nbsp;<br>
&gt; authentication.<br>
&gt; <br>
&gt; SOLUTION REQUIREMENTS<br>
&gt; <br>
&gt; R1: A client must be able to request an authentication challenge &nbsp;<br>
&gt; without causing a state change on the server<br>
&gt; R2: &nbsp;The mechanism for the authentication challenge must be clearly
&nbsp;<br>
&gt; identifiable within the specification<br>
&gt; R3: The client must be able to indicate which method the challenge
&nbsp;<br>
&gt; pertains to (since this can potentially vary by method, though it
&nbsp;<br>
&gt; usually doesn't)<br>
&gt; <br>
&gt; SOLUTION PROPOSAL<br>
&gt; <br>
&gt; I like the Force-Authenticate header as defined in the current draft.
&nbsp;<br>
&gt; I don't like the If approach (submit an If header with a known bad
&nbsp;<br>
&gt; lock token, hence the method will fail) for three reasons:<br>
&gt; <br>
&gt; * I feel uncomfortable depending on an unintended use of the If &nbsp;<br>
&gt; header -- especially for PUT, if a server ever doesn't handle If &nbsp;<br>
&gt; correctly, the forcing of authentication could inadvertently change
&nbsp;<br>
&gt; the contents of the resource (assuming you'd force authentication
&nbsp;<br>
&gt; with a zero length body with PUT)<br>
&gt; * It depends on the execution order of authentication vs. If header
&nbsp;<br>
&gt; processing within servers (I note this was rebutted in:<br>
&gt; http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/ <br>
&gt; 0335.html &nbsp;and I also note that mod_dav does do authentication
checks &nbsp;<br>
&gt; before If checks)<br>
&gt; * It's a really obscure way of satisfying the requirements (i.e.,
it &nbsp;<br>
&gt; fails requirement R2)<br>
&gt; <br>
&gt; <br>
&gt; My strong preference is for a new mechanism here (Force- <br>
&gt; Authenticate), though I could perhaps be swayed to adding a new &nbsp;<br>
&gt; section to the specification that explicitly describes the use of
If &nbsp;<br>
&gt; to force authentication, and gives an example of how this works. I
&nbsp;<br>
&gt; don't think this mechanism is one that most implementors would think
&nbsp;<br>
&gt; of, even if the have a deep understanding of the spec (like, me, for
&nbsp;<br>
&gt; example, who never thought of this).<br>
&gt; <br>
&gt; - Jim<br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
</tt></font>
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In-Reply-To: <c79ea955e419d09f6b557f50473d97bd@osafoundation.org>
To: Lisa Dusseault <lisa@osafoundation.org>
Cc: w3c-dist-auth@w3.org
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Subject: Re: [Bug 23] lock discovery vs shared locks
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The last sentence is incorrect.  A lock token appears in a PROPFIND
lockdiscovery only if the server wishes to expose it.  I have argued
in the past that a sensible server should never expose a lock token in a
PROPFIND lockdiscovery, since it just allows a client of a user 
to incorrectly re-use a lock token still in use by another client
of that user.  So if we say anything, it should "A server SHOULD NOT
include a lock token in a PROPFIND lockdiscovery, since it introduces
the possibility of two clients of a given user overwriting each others
changes".

Cheers,
Geoff

Lisa wrote on 10/28/2005 06:48:52 PM:

> 
> On Oct 27, 2005, at 10:58 AM, Elias Sinderson wrote:
> 
> >
> > Julian Reschke wrote:
> >
> >> Proposed resolution for 
> >> <http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23>: [...]
> >> NEW:
> >>    A lock token is a type of state token, represented as a URI, which
> >>    identifies a particular lock.  Each lock has exactly one unique 
> >> lock
> >>    token, which is returned upon a successful LOCK creation operation 

> >> in
> >>    the "Lock-Token" response header defined in Section 9.6.
> >
> > I have no issues with the proposed text.
> >
> >
> > Cheers,
> > Elias
> >
> >
> It's not just the Lock-Token response header that shows the lock token 
> in response to LOCK, the token also appears in the lockdiscovery 
> property value, which is included in the body of the LOCK response. 
> There's a couple issues that the section on lock tokens should address:
>   - how lock tokens relate to locks (one and only one)
>   - who generates them, how, and requirements (uniqueness, that clients 
> MUST not interpret)
>   - where to get them (Lock-Token response, lockdiscovery property)
> 
> So here's the (work-in-progress) text for the whole section on lock 
> tokens, including my attempts to incorporate several bits of suggested 
> text in a readable order, while also being complete:
> 
> ----
> 
>   A lock token is a type of state token, represented as a URI, which 
> identifies a particular lock. Each lock has exactly one unique lock 
> token generated by the server. Clients MUST NOT attempt to interpret 
> lock tokens in any way.
> 
> Lock token URIs MUST be unique across all resources for all time. This 
> uniqueness constraint allows lock tokens to be submitted across 
> resources and servers without fear of confusion.
> 
> When a LOCK operation creates a new lock, the new lock token is 
> returned in the Lock-Token response header defined in Section 9.6 
> (Lock-Token Header), and also in the body of the response. Also note 
> that lock tokens MUST appear in the 'lockdiscovery' property of a 
> locked resource.
> 
> Submitting a lock token does not confer full privilege to use the lock 
> token or modify the locked resource. Anyone can find out anyone else's 
> lock token by performing lock discovery. Write access and other 
> privileges MUST be enforced through normal privilege or authentication 
> mechanisms, not based on the slight obscurity of lock token values.
> 
> Since lock tokens are unique, a client MAY submit a lock token in an If 
> header on a resource other than the one that returned it.
> 
> This specification encourages servers to create UUIDs for lock tokens, 
> and to use the URI form defined by Universal Unique Identifier (UUID) 
> [9]. However servers are free to use another valid URI so long as it 
> meets the uniqueness requirements. For example, a valid lock token 
> might be constructed using the "opaquelocktoken" scheme defined in an 
> appendix of this document.
> 
> Example: "urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6"
> 
> ----
> 
> There were some comments in a previous email from Julian about how the 
> lock token might not appear in the 'lockdiscovery' property if there 
> are multiple (shared) locks on the resource.  This statement doesn't 
> fit my understanding, so I haven't yet "fixed" that if I am indeed 
> wrong.  Doesn't the 'lockdiscovery' property include every active lock 
> on the resource and all their lock tokens?
> 
> Lisa

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<br><font size=2><tt>The last sentence is incorrect. &nbsp;A lock token
appears in a PROPFIND</tt></font>
<br><font size=2><tt>lockdiscovery only if the server wishes to expose
it. &nbsp;I have argued</tt></font>
<br><font size=2><tt>in the past that a sensible server should never expose
a lock token in a</tt></font>
<br><font size=2><tt>PROPFIND lockdiscovery, since it just allows a client
of a user </tt></font>
<br><font size=2><tt>to incorrectly re-use a lock token still in use by
another client</tt></font>
<br><font size=2><tt>of that user. &nbsp;So if we say anything, it should
&quot;A server SHOULD NOT</tt></font>
<br><font size=2><tt>include a lock token in a PROPFIND lockdiscovery,
since it introduces</tt></font>
<br><font size=2><tt>the possibility of two clients of a given user overwriting
each others</tt></font>
<br><font size=2><tt>changes&quot;.</tt></font>
<br>
<br><font size=2><tt>Cheers,<br>
Geoff</tt></font>
<br>
<br><font size=2><tt>Lisa wrote on 10/28/2005 06:48:52 PM:<br>
<br>
&gt; <br>
&gt; On Oct 27, 2005, at 10:58 AM, Elias Sinderson wrote:<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; Julian Reschke wrote:<br>
&gt; &gt;<br>
&gt; &gt;&gt; Proposed resolution for <br>
&gt; &gt;&gt; &lt;http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23&gt;:
[...]<br>
&gt; &gt;&gt; NEW:<br>
&gt; &gt;&gt; &nbsp; &nbsp;A lock token is a type of state token, represented
as a URI, which<br>
&gt; &gt;&gt; &nbsp; &nbsp;identifies a particular lock. &nbsp;Each lock
has exactly one unique <br>
&gt; &gt;&gt; lock<br>
&gt; &gt;&gt; &nbsp; &nbsp;token, which is returned upon a successful LOCK
creation operation <br>
&gt; &gt;&gt; in<br>
&gt; &gt;&gt; &nbsp; &nbsp;the &quot;Lock-Token&quot; response header defined
in Section 9.6.<br>
&gt; &gt;<br>
&gt; &gt; I have no issues with the proposed text.<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; Cheers,<br>
&gt; &gt; Elias<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; It's not just the Lock-Token response header that shows the lock token
<br>
&gt; in response to LOCK, the token also appears in the lockdiscovery <br>
&gt; property value, which is included in the body of the LOCK response.
&nbsp; <br>
&gt; There's a couple issues that the section on lock tokens should address:<br>
&gt; &nbsp; - how lock tokens relate to locks (one and only one)<br>
&gt; &nbsp; - who generates them, how, and requirements (uniqueness, that
clients <br>
&gt; MUST not interpret)<br>
&gt; &nbsp; - where to get them (Lock-Token response, lockdiscovery property)<br>
&gt; <br>
&gt; So here's the (work-in-progress) text for the whole section on lock
<br>
&gt; tokens, including my attempts to incorporate several bits of suggested
<br>
&gt; text in a readable order, while also being complete:<br>
&gt; <br>
&gt; ----<br>
&gt; <br>
&gt; &nbsp; A lock token is a type of state token, represented as a URI,
which <br>
&gt; identifies a particular lock. Each lock has exactly one unique lock
<br>
&gt; token generated by the server. Clients MUST NOT attempt to interpret
<br>
&gt; lock tokens in any way.<br>
&gt; <br>
&gt; Lock token URIs MUST be unique across all resources for all time.
This <br>
&gt; uniqueness constraint allows lock tokens to be submitted across <br>
&gt; resources and servers without fear of confusion.<br>
&gt; <br>
&gt; When a LOCK operation creates a new lock, the new lock token is <br>
&gt; returned in the Lock-Token response header defined in Section 9.6
<br>
&gt; (Lock-Token Header), and also in the body of the response. Also note
<br>
&gt; that lock tokens MUST appear in the 'lockdiscovery' property of a
<br>
&gt; locked resource.<br>
&gt; <br>
&gt; Submitting a lock token does not confer full privilege to use the
lock <br>
&gt; token or modify the locked resource. Anyone can find out anyone else's
<br>
&gt; lock token by performing lock discovery. Write access and other <br>
&gt; privileges MUST be enforced through normal privilege or authentication
<br>
&gt; mechanisms, not based on the slight obscurity of lock token values.<br>
&gt; <br>
&gt; Since lock tokens are unique, a client MAY submit a lock token in
an If <br>
&gt; header on a resource other than the one that returned it.<br>
&gt; <br>
&gt; This specification encourages servers to create UUIDs for lock tokens,
<br>
&gt; and to use the URI form defined by Universal Unique Identifier (UUID)
&nbsp;<br>
&gt; [9]. However servers are free to use another valid URI so long as
it <br>
&gt; meets the uniqueness requirements. For example, a valid lock token
<br>
&gt; might be constructed using the &quot;opaquelocktoken&quot; scheme
defined in an <br>
&gt; appendix of this document.<br>
&gt; <br>
&gt; Example: &quot;urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6&quot;<br>
&gt; <br>
&gt; ----<br>
&gt; <br>
&gt; There were some comments in a previous email from Julian about how
the <br>
&gt; lock token might not appear in the 'lockdiscovery' property if there
<br>
&gt; are multiple (shared) locks on the resource. &nbsp;This statement
doesn't <br>
&gt; fit my understanding, so I haven't yet &quot;fixed&quot; that if I
am indeed <br>
&gt; wrong. &nbsp;Doesn't the 'lockdiscovery' property include every active
lock <br>
&gt; on the resource and all their lock tokens?<br>
&gt; <br>
&gt; Lisa<br>
</tt></font>
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+1 for either Jim's suggested text or saying nothing,
and +1 that we then close this issue.

Cheers,
Geoff


Jim wrote on 10/28/2005 05:38:38 PM:

> Lisa writes:
> 
> However, without those pieces of text, the use of the Location 
> header with 207 responses becomes undefined, and that always makes 
> me feel uncomfortable.    Server implementors won't know for sure if
> they can use the Location header, it seems logical that it might 
> work but as we've seen there are some subtleties in how the client 
> might interpret that.  Clients are probably not prepared to handle 
> it.  So I propose that we include text to be clear that the Location
> header SHOULD NOT appear in certain responses.  
> 
> The HTTP specification generally doesn't explain all interactions of
> methods, headers, and response codes. Location only has defined 
> semantics for certain response codes in HTTP.
> 
> On the other hand, the HTTP spec. isn't necessarily such a paragon 
> of good writing that we should strive to emulate it.
> 
> My solution to this issue is to add the text:
> 
> "Use of the Location header with the methods and response codes 
> defined in this specification is intentionally undefined."
> 
> And leave it at that. This lets clients know they can't depend on 
> the feature, and lets servers know they probably shouldn't go there.
> But, if a later spec. does add something here (like a refined 
> REDIRECT spec.), then the door is left open for new behavior.
> 
> Can we please close this issue?
> 
> - Jim
> 
> I'm sensitive to the worry of preventing extensions but surely 
> there's some way of dealing with that.  An extension can override 
> "SHOULD" level requirements, or we could come up with some 
> "exception" language... as in "servers SHOULD NOT return a Location 
> header in these responses unless the client has some way to 
> interpret that header."
> 
> Lisa 
> 
> On Oct 27, 2005, at 8:17 PM, Geoffrey M Clemm wrote:
> 
> +1 
> 
> w3c-dist-auth-request@w3.org wrote on 10/27/2005 07:50:06 PM:
> 
>  > 
>  > >
>  > 
>  > Julian writes:
>  > > Back to this issue:
>  > >
>  > > 1) I'm not aware of any interop problems.
>  > >
>  > > 2) I'm not aware of anybody having asked about this.
>  > >
>  > > 3) I don't see any benefit in RFC2518bis making statements about  
>  > > this, even if we *did* agree on what to say
>  > 
>  > I have just read through this entire thread, and I agree with his  
>  > statement above, and the conclusion Julian reached in:
>  > 
http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0294.html
>  > 
>  > Specifically:
>  > 
>  > * I don't think there is a compelling need to disallow Location and 
207
>  > * I don't think we need any special mechanism for handling 3xx within 
 
>  > a PROPFIND
>  > * I think it's fine if a client needs to retry a PROPFIND request if 
 
>  > it receives a 3xx response
>  > 
>  > I feel a slight desire to add a 3xx response to one of the PROPFIND  
>  > 207 response examples in the text, but could live without it.
>  > 
>  > Unless others chime in, I think we're seeing rough consensus for  
>  > removing the current 8.1.3, whose text is described in Bug 12 within 
 
>  > Bugzilla:
>  > http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=12
>  > 
>  > - Jim
>  > 
>  > 
>  > 
>  > 
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<br><font size=2><tt>+1 for either Jim's suggested text or saying nothing,</tt></font>
<br><font size=2><tt>and +1 that we then close this issue.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br>
<br><font size=2><tt>Jim wrote on 10/28/2005 05:38:38 PM:<br>
<br>
&gt; Lisa writes:</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; However, without those pieces of text, the use of the Location <br>
&gt; header with 207 responses becomes undefined, and that always makes
<br>
&gt; me feel uncomfortable.&nbsp; &nbsp; Server implementors won't know
for sure if<br>
&gt; they can use the Location header, it seems logical that it might <br>
&gt; work but as we've seen there are some subtleties in how the client
<br>
&gt; might interpret that.&nbsp; Clients are probably not prepared to handle
<br>
&gt; it.&nbsp; So I propose that we include text to be clear that the Location<br>
&gt; header SHOULD NOT appear in certain responses. &nbsp;</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; The HTTP specification generally doesn't explain all interactions
of<br>
&gt; methods, headers, and response codes. Location only has defined <br>
&gt; semantics for certain response codes in HTTP.</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; On the other hand, the HTTP spec. isn't necessarily such a paragon
<br>
&gt; of good writing that we should strive to emulate it.</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; My solution to this issue is to add the text:</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; &quot;Use of the Location header with the methods and response codes
<br>
&gt; defined in this specification is intentionally undefined.&quot;</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; And leave it at that. This lets clients know they can't depend on
<br>
&gt; the feature, and lets servers know they probably shouldn't go there.<br>
&gt; But, if a later spec. does add something here (like a refined <br>
&gt; REDIRECT spec.), then the door is left open for new behavior.</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; Can we please close this issue?</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; - Jim</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; I'm sensitive to the worry of preventing extensions but surely <br>
&gt; there's some way of dealing with that.&nbsp; An extension can override
<br>
&gt; &quot;SHOULD&quot; level requirements, or we could come up with some
<br>
&gt; &quot;exception&quot; language... as in &quot;servers SHOULD NOT return
a Location <br>
&gt; header in these responses unless the client has some way to <br>
&gt; interpret that header.&quot;</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; Lisa&nbsp;</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; On Oct 27, 2005, at 8:17 PM, Geoffrey M Clemm wrote:</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; +1&nbsp;</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; w3c-dist-auth-request@w3.org wrote on 10/27/2005 07:50:06 PM:</tt></font>
<br><font size=2><tt>&gt; <br>
&gt; &nbsp;&gt;&nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; &gt;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt;&nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; Julian writes:</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; &gt; Back to this issue:</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; &gt;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; &gt; 1) I'm not aware of any interop
problems.</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; &gt;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; &gt; 2) I'm not aware of anybody having
asked about this.</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; &gt;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; &gt; 3) I don't see any benefit in
RFC2518bis making statements about &nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; &gt; this, even if we *did* agree
on what to say</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt;&nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; I have just read through this entire
thread, and I agree with his &nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; statement above, and the conclusion
Julian reached in:</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0294.html</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt;&nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; Specifically:</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt;&nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; * I don't think there is a compelling
need to disallow Location and 207</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; * I don't think we need any special
mechanism for handling 3xx within &nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; a PROPFIND</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; * I think it's fine if a client needs
to retry a PROPFIND request if &nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; it receives a 3xx response</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt;&nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; I feel a slight desire to add a 3xx
response to one of the PROPFIND &nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; 207 response examples in the text,
but could live without it.</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt;&nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; Unless others chime in, I think we're
seeing rough consensus for &nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; removing the current 8.1.3, whose
text is described in Bug 12 within &nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; Bugzilla:</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=12</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt;&nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt; - Jim</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt;&nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt;&nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt;&nbsp;</tt></font>
<br><font size=2><tt>&gt; &nbsp;&gt;&nbsp;</tt></font>
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http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=18





------- Additional Comments From lisa@osafoundation.org  2005-10-28 21:07 -------
Interestingly, this approach would prevent the client from sending the big
request body, which "Force-Authenticate" wouldn't do (unless the client used it
on an OPTIONS before using it on the big PUT).  The thing is, I don't think a
lot of servers implement this (I can't think of any that do for sure).  It would
be good to collect some data.



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From: Lisa Dusseault <lisa@osafoundation.org>
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No it's not just for LOCK and PUT -- a client doing read-only requests=20=

(like PROPFIND) might see different results depending on whether or not=20=

they're authenticated.  Some of the resources in a collection might be=20=

publicly readable (so the PROPFIND can succeed if anonymous) but others=20=

be hidden to unauthenticated users.

More generally, it's not actually a WebDAV problem alone.  If a client=20=

does a GET to a dynamically generated page, they could easily see=20
different results based on whether they're authenticated or not.  Since=20=

browsers today often cache authentication information, this means that=20=

the browser could inform the server that they'd like the challenge to=20
save the user the step of first going to the site, seeing the anonymous=20=

page version, then choosing to login.  Of course some sites use cookies=20=

for this but cookies are sometimes disabled, expired, etc.

Lisa

On Oct 28, 2005, at 8:06 PM, Geoffrey M Clemm wrote:

>
> To avoid sending the PUT body twice, why can't a client just
> use the standard HTTP "Expect 100-Continue" header?
>
> And if a client is proactively checking for authentication preceding
> a series of PUT calls, then having it just perform an initial=20
> LOCK/UNLOCK
> to get the credential challenge doesn't seem like an unreasonable=20
> overhead
> (2 initial requests).
>
> So is this just a technique for servers that want to provide this
> capability but don't want to support LOCK? =A0
>
> Cheers,
>  Geoff
>
> Jim wrote on 10/27/2005 08:34:39 PM:
>  >
>  > >
>  >
>  > Julian writes:
>  >
>  > > So this is a process issue -- if it's supposed to become part of =
=A0
>  > > WebDAV, it has to make it through the process of (1) define what =
=A0
>  > > the problem is, then (2) find a WG consensus of how to resolve =A0
>  > > this. "Force-Authenticate" may very well be the solution.
>  >
>  > OK, I feel pretty strongly about this feature, so let me do the due=20=

> =A0
>  > diligence here.
>  >
>  > PROBLEM STATEMENT
>  >
>  > Some WebDAV servers are configured to allow live authoring, where=20=

> the =A0
>  > authored changes are immediately visible to the external world. In =
=A0
>  > this situation, resources typically have access controls set such =A0=

>  > that GET, HEAD, POST, PROPFIND and OPTIONS can be performed by any =
=A0
>  > user without authentication. Write operations such as PUT, LOCK, =A0
>  > UNLOCK, MKCOL, MOVE, and COPY require authentication and access =A0
>  > permissions. In some cases, a client would do a series of=20
> operations =A0
>  > that do not require authentication, then perform a PUT of a large =A0=

>  > resource (this can happen with the common Microsoft Web Folders =A0
>  > client). In this situation, the large resource body needs to be=20
> sent =A0
>  > twice: the initial PUT (which gets a 401 response), and the second =
=A0
>  > PUT, with authentication credentials.
>  >
>  > Ideally, a client would like to test a resource to see whether it =A0=

>  > should ever send authentication credentials. It is far more =A0
>  > convenient for a client author to make a single test at the=20
> beginning =A0
>  > of a session, discover that some methods will require=20
> authentication =A0
>  > credentials, and then consistently supply those authentication =A0
>  > credentials for every method invocation thereafter. Since a client =
=A0
>  > does not know which authentication scheme is in use, or what nonce =
=A0
>  > values will be used in Digest Auth, it cannot speculatively provide=20=

> =A0
>  > authentication values without receiving a challenge (401) from the =
=A0
>  > server first. While in general it is the case that authentication =A0=

>  > requirements can vary by method, even on the same resource, this =A0
>  > configuration is extremely unusual. Hence, a client that=20
> proactively =A0
>  > supplies a set of authentication credentials gathered from testing =
=A0
>  > one method that requires authentication (PUT, say), will likely=20
> find =A0
>  > that these same authentication credentials will work for all other =
=A0
>  > methods (LOCK, UNLOCK, etc.) on the same resource that also require=20=

> =A0
>  > authentication.
>  >
>  > SOLUTION REQUIREMENTS
>  >
>  > R1: A client must be able to request an authentication challenge =A0
>  > without causing a state change on the server
>  > R2: =A0The mechanism for the authentication challenge must be =
clearly=20
> =A0
>  > identifiable within the specification
>  > R3: The client must be able to indicate which method the challenge =
=A0
>  > pertains to (since this can potentially vary by method, though it =A0=

>  > usually doesn't)
>  >
>  > SOLUTION PROPOSAL
>  >
>  > I like the Force-Authenticate header as defined in the current=20
> draft. =A0
>  > I don't like the If approach (submit an If header with a known bad =
=A0
>  > lock token, hence the method will fail) for three reasons:
>  >
>  > * I feel uncomfortable depending on an unintended use of the If =A0
>  > header -- especially for PUT, if a server ever doesn't handle If =A0
>  > correctly, the forcing of authentication could inadvertently change=20=

> =A0
>  > the contents of the resource (assuming you'd force authentication =A0=

>  > with a zero length body with PUT)
>  > * It depends on the execution order of authentication vs. If header=20=

> =A0
>  > processing within servers (I note this was rebutted in:
>  > http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/
>  > 0335.html =A0and I also note that mod_dav does do authentication=20
> checks =A0
>  > before If checks)
>  > * It's a really obscure way of satisfying the requirements (i.e.,=20=

> it =A0
>  > fails requirement R2)
>  >
>  >
>  > My strong preference is for a new mechanism here (Force-
>  > Authenticate), though I could perhaps be swayed to adding a new =A0
>  > section to the specification that explicitly describes the use of=20=

> If =A0
>  > to force authentication, and gives an example of how this works. I =
=A0
>  > don't think this mechanism is one that most implementors would=20
> think =A0
>  > of, even if the have a deep understanding of the spec (like, me,=20
> for =A0
>  > example, who never thought of this).
>  >
>  > - Jim
>  >
>  >
>  >
>  >
>  >
>  >
>  >

--Apple-Mail-18--219400086
Content-Type: text/enriched;
	charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

No it's not just for LOCK and PUT -- a client doing read-only requests
(like PROPFIND) might see different results depending on whether or
not they're authenticated.  Some of the resources in a collection
might be publicly readable (so the PROPFIND can succeed if anonymous)
but others be hidden to unauthenticated users.


More generally, it's not actually a WebDAV problem alone.  If a client
does a GET to a dynamically generated page, they could easily see
different results based on whether they're authenticated or not.=20
Since browsers today often cache authentication information, this
means that the browser could inform the server that they'd like the
challenge to save the user the step of first going to the site, seeing
the anonymous page version, then choosing to login.  Of course some
sites use cookies for this but cookies are sometimes disabled,
expired, etc.


Lisa


On Oct 28, 2005, at 8:06 PM, Geoffrey M Clemm wrote:


<excerpt>

<fixed><x-tad-smaller>To avoid sending the PUT body twice, why can't a
client just</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>use the standard HTTP "Expect 100-Continue"
header?</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>And if a client is proactively checking for
authentication preceding</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>a series of PUT calls, then having it just
perform an initial LOCK/UNLOCK</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>to get the credential challenge doesn't seem
like an unreasonable overhead</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>(2 initial requests).</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>So is this just a technique for servers that
want to provide this</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>capability but don't want to support LOCK?
=A0</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>Cheers,</x-tad-smaller></fixed>

<fixed><x-tad-smaller> Geoff</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>Jim wrote on 10/27/2005 08:34:39 =
PM:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > ></x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Julian writes:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > So this is a process issue -- if it's
supposed to become part of =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > WebDAV, it has to make it through the
process of (1) define what =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > the problem is, then (2) find a WG
consensus of how to resolve =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > this. "Force-Authenticate" may very well be
the solution.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > OK, I feel pretty strongly about this
feature, so let me do the due =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > diligence here.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > PROBLEM STATEMENT</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Some WebDAV servers are configured to allow
live authoring, where the =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > authored changes are immediately visible to
the external world. In =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > this situation, resources typically have
access controls set such =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > that GET, HEAD, POST, PROPFIND and OPTIONS
can be performed by any =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > user without authentication. Write operations
such as PUT, LOCK, =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > UNLOCK, MKCOL, MOVE, and COPY require
authentication and access =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > permissions. In some cases, a client would do
a series of operations =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > that do not require authentication, then
perform a PUT of a large =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > resource (this can happen with the common
Microsoft Web Folders =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > client). In this situation, the large
resource body needs to be sent =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > twice: the initial PUT (which gets a 401
response), and the second =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > PUT, with authentication =
credentials.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Ideally, a client would like to test a
resource to see whether it =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > should ever send authentication credentials.
It is far more =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > convenient for a client author to make a
single test at the beginning =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > of a session, discover that some methods will
require authentication =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > credentials, and then consistently supply
those authentication =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > credentials for every method invocation
thereafter. Since a client =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > does not know which authentication scheme is
in use, or what nonce =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > values will be used in Digest Auth, it cannot
speculatively provide =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > authentication values without receiving a
challenge (401) from the =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > server first. While in general it is the case
that authentication =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > requirements can vary by method, even on the
same resource, this =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > configuration is extremely unusual. Hence, a
client that proactively =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > supplies a set of authentication credentials
gathered from testing =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > one method that requires authentication (PUT,
say), will likely find =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > that these same authentication credentials
will work for all other =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > methods (LOCK, UNLOCK, etc.) on the same
resource that also require =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > authentication.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > SOLUTION REQUIREMENTS</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > R1: A client must be able to request an
authentication challenge =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > without causing a state change on the =
server</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > R2: =A0The mechanism for the authentication
challenge must be clearly =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > identifiable within the =
specification</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > R3: The client must be able to indicate which
method the challenge =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > pertains to (since this can potentially vary
by method, though it =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > usually doesn't)</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > SOLUTION PROPOSAL</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > I like the Force-Authenticate header as
defined in the current draft. =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > I don't like the If approach (submit an If
header with a known bad =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > lock token, hence the method will fail) for
three reasons:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > * I feel uncomfortable depending on an
unintended use of the If =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > header -- especially for PUT, if a server
ever doesn't handle If =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > correctly, the forcing of authentication
could inadvertently change =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > the contents of the resource (assuming you'd
force authentication =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > with a zero length body with =
PUT)</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > * It depends on the execution order of
authentication vs. If header =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > processing within servers (I note this was
rebutted in:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> >
=
http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JulSep/</x-tad-small=
er></fixed>

<fixed><x-tad-smaller> > 0335.html =A0and I also note that mod_dav does
do authentication checks =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > before If checks)</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > * It's a really obscure way of satisfying the
requirements (i.e., it =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > fails requirement R2)</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > My strong preference is for a new mechanism
here (Force- </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Authenticate), though I could perhaps be
swayed to adding a new =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > section to the specification that explicitly
describes the use of If =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > to force authentication, and gives an example
of how this works. I =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > don't think this mechanism is one that most
implementors would think =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > of, even if the have a deep understanding of
the spec (like, me, for =A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > example, who never thought of =
this).</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > - Jim</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

</excerpt>=

--Apple-Mail-18--219400086--





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Subject: Re: [Bug 18] no record of consensus for force-authenticate
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Jim Whitehead wrote:
>>
>> I have no problem adding non-normative text explaining this.
>>
> 
> I'm thinking that the right choice here is to create an appendix  
> describing the problem, and the recommended solution(s). While I  agree 
> that we shouldn't be wily-nilly giving implementation advice,  this is a 
> common enough problem, whose solution is sufficiently non- obvious, that 
> adding appendix text makes sense.
> 
> I also think we should add a force-authenticate feature, but I think  it 
> makes sense to put this in a separate "DAV-fixes" draft. This  draft can 
> accumulate items like Force-Authenticate, and the reliable  etags for 
> the body and dead properties, etc. I'll take an action item  to start 
> creating this draft. I'll make it a private draft, so Cullen  doesn't 
> have to justify the creation of a new WG item :-)

Sounds good.




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Jim Whitehead wrote:
> Julian,
> 
> I'm unclear what changes Lisa needs to make at this point. Are there  
> specific figures that are causing a problem?

No, these have been fixed.

> Also, I don't think it's fair to ding Lisa for using the released  
> version of xml2rfc, while you're using the unreleased head of the  
> development tree.

I'm not doing that. I was just stating that I if she uses the "strict" 
mode, figures need to fit into the 69 character limit, otherwise the 
conversion doesn't work over here (remember: it would be much simpler if 
Lisa would publish the TXT and HTML along with the XML; I was 
*volunteering* to do ths over here).

Best regards, Julian




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Jim Whitehead wrote:
>> More changes that I think do not represent WG consensus:
>>
>> 1: <http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis- 
>> latest.html#rfc.section.9.5.3.p.4>:
>>
>> -- 
>> The Not production is particularly useful with the "<DAV:no-lock>"  
>> state token. The clause "Not <DAV:no-lock>" MUST evaluate to true.  
>> Thus, any "OR" statement containing the clause "Not <DAV:no-lock>"  
>> MUST also evaluate to true.
>> -- 
> 
> 
> This sounds right to me.
> 
>>
>> This now says MUST instead of "must". I'm not sure why RFC2119  
>> terminology is invoked here. URIs in the DAV: namespace by  definition 
>> never represent a lock token, because they can only be  assigned by 
>> the IETF or this WG. So the statement applies to *all*  URIs that use 
>> the DAV: URI scheme, "DAV:no-lock" is just one example.
>>
>> If you really feel that this needs to be stated somewhere, please  
>> don't make it sound as if "DAV:no-lock" is different from -- for  
>> instance -- "DAV:lock".
> 
> 
> I know there was an issue with organizations adding things to the  DAV: 
> namespace without using the IETF process. However, this section  doesn't 
> seem like the right place to address this issue.

OK, but hat doesn't change the argument. No URI in the DAV: scheme ever 
identifies a valid lock token, by definition. Saying "MUST" and only 
stating "DAV:no-lock" *will* cause implementors to add special code for 
this one string.

>> 2: <http://greenbytes.de/tech/webdav/draft-ietf-webdav-rfc2518bis- 
>> latest-from-07.diff.html#diff-30>:
>>
>> Why was the registration for "opaquelocktoken" removed from the  IANA 
>> considerations? Thinking of it, why was the definition for the  "DAV" 
>> URI scheme removed as well?????
>>
> 
> Based on Ted Hardie's email of today, it sounds like these will  
> continue to be registered, whether in the IANA considerations section  
> or no. That said, it would be useful to have a brief sentence to the  
> effect of, "the URI registrations for opaquelocktoken and DAV URI  
> schemes made in RFC 2518 should still be considered active."

Jim, does that mean that we leave out all stuff that doesn't need 
changes? People would still be able to look it up in RFC2518, after all. 
Me confused.

Best regards, Julian





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Lisa Dusseault wrote:
> 
> On Oct 28, 2005, at 2:51 PM, Jim Whitehead wrote:
> 
>> URI registrations for opaquelocktoken and DAV URI schemes made in RFC 
>> 2518 should still be considered active."
>>
> 
> While looking at the IANA considerations section, this text caught my eye:
> 
>    This document defines two namespaces, the namespace of property
>    names, and the namespace of WebDAV-specific XML elements used within
>    property values.
> 
> I don't count two namespace, just one (DAV:).  any objections if I fix 
> this sentence?

Yes.

This section defines namespaces (spaces of names), not XML namespaces.

in fact, we have even more spaces of names in use:

- in property values
- in precondition/postcondition names
- in resource types
- in report names (RFC3253)
- in ACEs (RFC3744)

This probably means that we shouldn't list them all, but simply try to 
make a generaln statement how WebDAV uses XML-based identifiers in 
different contexts, and that usage of identifiers in the "DAV:" 
namespace is controlled by the IETF.

Best regards, Julian





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Jim Whitehead wrote:
>> If the working group wants people to propose ready-for-spec text, then=
=20
>> I think that text should either be used, or those you don't like it=20
>> should at least state what was wrong with it.
>=20
>=20
> I don't think the editor should have to defend every minor text change.=
=20
> In particular, I think some of Lisa's additions are good (and she caugh=
t=20
> one error in the ABNF that you missed). However, you did catch a few=20

Don't think so.

> minor errors, and one case of overspecification. Gee, it's almost like=20
> when multiple people collaborate on a document, the final result is of=20
> higher quality :-)

Yes, it is. However, I think we would be even more productive if text=20
that is proposed actually gets discussed, instead of being ignored.=20
Unless we want people to stop making proposals, if it starts to look=20
like a waste of time.

>> For the record, I proposed:
>>
>>  Appendix C.  'opaquelocktoken' URI Scheme
>>
>>    The 'opaquelocktoken' URI scheme defined below uses the Universal
>>    Unique Identifier (UUID) mechanism ([9], Section 4) to easily
>>    generate lock tokens fulfilling the uniqueness requirements stated =
in
>>    Section 6.3.
>>
>>      OpaqueLockToken-URI =3D "opaquelocktoken:" UUID [path]
>>      ; UUID: see [RFC4122], Section 3.
>>      ; path: see [RFC3986], Section 3.3.
>>
>>    Note that the optional "path" postfix allows to generate many lock
>>    tokens from a single URI, by appending an varying string such as a
>>    sequence number.
>>
>>    Example:
>>
>>      opaquelocktoken:f81de2ad-7f3d-a1b2-4f3c-00a0c91a9d76-0017
>=20
>=20
> I like this text, but I think Lisa does have some valuable contribution=
s.
>=20
> Lisa's note about LWS is necessary, since otherwise you could have any=20
> amount of LWS between "opaquelocktoken:" and UUID and [path].

Really? I'm no ABNF expert, but that seems to be incorrect. If it's=20
true, we need similar text for the TimeType production in the Timeout=20
(<http://greenbytes.de/tech/webdav/rfc2518.html#HEADER_Timeout>) header.

> I also generally like Lisa's new introduction sentence, since it=20
> provides a modicum of context for the appendix.
>=20
> I'd tweak the introduction sentence slightly:
>=20
> The 'opaquelocktoken' URI scheme can be used by servers to create=20
> syntactically correct and easy-to-generate URIs out of UUIDs, intended=20
> to be used as lock tokens, meeting the requirements for uniqueness=20
> across all resources for all time.=20
>=20
>=20
>>    A server MAY generate one ore more UUIDs to use with the
>>    'opaquelocktoken' scheme as lock tokens.  A server MAY reuse a UUID
>>    with extension characters added.  If the server does this then the
>>    algorithm generating the extensions MUST guarantee that the same
>>    extension will never be used twice with the associated UUID.
>=20
>=20
> This is implicit in the ABNF definition for opaquelocktoken, and doesn'=
t=20
> need to be stated.=20

That's true; but it gives the raison d'=EAtre for this URI scheme. Once=20
I'm being a bit more verbose :-)

>>    OpaqueLockToken-URI =3D "opaquelocktoken:" UUID [Extension]  ; The =
UUID
>>    production is the string representation of a UUID.  Note that white
>>    space (LWS) is not allowed between elements of this production.
>=20
>=20
> For this section, I recommend:
>=20
> OpaqueLockToken-URI =3D "opaquelocktoken:" UUID [path]
>    ; UUID: see [RFC4122], Section 3.
>    ; path: see [RFC3986], Section 3.3.
> Note that white space (LWS) is not allowed between elements of this=20
> production.

See above.

 > ...

Best regards, and thanks fore reviewing both proposals.

Best regards, Julian




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Geoffrey M Clemm wrote:
> 
> To avoid sending the PUT body twice, why can't a client just
> use the standard HTTP "Expect 100-Continue" header?

It could, but it's a known problem that few servers implement that 
correctly, meaning that the expected header check is indeed skipped (for 
instance, a server using the servlet API normally doesn't have any 
chance doing this check, see 
<http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4812000>).

> And if a client is proactively checking for authentication preceding
> a series of PUT calls, then having it just perform an initial LOCK/UNLOCK
> to get the credential challenge doesn't seem like an unreasonable overhead
> (2 initial requests).
> 
> So is this just a technique for servers that want to provide this
> capability but don't want to support LOCK?  

Seems so, because LOCK seems to be yet another existing way to get what 
those clients want.

Best regards, Julian




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Lisa Dusseault wrote:
> No it's not just for LOCK and PUT -- a client doing read-only requests 
> (like PROPFIND) might see different results depending on whether or not 
> they're authenticated. Some of the resources in a collection might be 
> publicly readable (so the PROPFIND can succeed if anonymous) but others 
> be hidden to unauthenticated users.

But you could still use LOCK to enforce authentication, right?

> More generally, it's not actually a WebDAV problem alone. If a client 
> does a GET to a dynamically generated page, they could easily see 
> different results based on whether they're authenticated or not. Since 
> browsers today often cache authentication information, this means that 
> the browser could inform the server that they'd like the challenge to 
> save the user the step of first going to the site, seeing the anonymous 
> page version, then choosing to login. Of course some sites use cookies 
> for this but cookies are sometimes disabled, expired, etc.

In which case I would recommend to

- update Jim's description of the problem accordingly and

- do this in a separate draft, optimally discussed on the HTTP WG's 
mailing list.

Best regards, Julian




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Jim Whitehead wrote:
 > ...
> My solution to this issue is to add the text:
> 
> "Use of the Location header with the methods and response codes defined 
> in this specification is intentionally undefined."

No, that's completely incorrect. It's defined in RFC2616, and what 
RFC2616 says also applies to WebDAV. For instance, it's absolutely 
well-defined what it means to get a 302 + Location header upon PROPFIND.

> And leave it at that. This lets clients know they can't depend on the 
> feature, and lets servers know they probably shouldn't go there. But, if 
> a later spec. does add something here (like a refined REDIRECT spec.), 
> then the door is left open for new behavior.
> 
> Can we please close this issue?

As far as I can tell, the simplest way to close this issue is to revert 
back to what RFC2518 says.

Best regards, Julian




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Lisa Dusseault wrote:
> One thing I noticed when checking this against and editing the text 
> (sometimes this turns up new observations): We actually use the Location 
> header in response to a MOVE request, in section 8.9.5 of RFC2518. Yet 
> there's no explanation for this -- the text around the example doesn't 
> indicate whether the server could have chosen a different destination 
> URL (which seems very harmful to interoperability to me) or, if not, why 
> the Location header is even needed.
 > ...

RFC2616 recommends to use the Location header when a new resource is 
created:

<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.14.30>

That is, if you consider MOVE as a sequence of COPY-then-DELETE, this is 
exactly the right thing to do.

As I personally prefer MOVE to work differently, I'd be happy to change 
that example, but that's *really* a different issue from what we were 
discussing here.

Best regards, Julian




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Jim Whitehead wrote:
> ...
> However, even this I'm starting to feel is a bad idea. Why do we stop at 
> Location? Why not create a table with all HTTP headers and state whether 
> they should be used with 207?
> 
> - Jim

Hey! I see light at the end of the tunnel :-)

Generally, the set of things we do not define is open-ended. I'm against 
making statements about these things, unless they clearly result in 
confusion and interop problems.

Best regards, Julian




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Lisa Dusseault wrote:
> 
> 
> On Oct 28, 2005, at 3:13 PM, Jim Whitehead wrote:
> 
>>> What if I remove the header from the response example, in addition to 
>>> Jim's suggested change?
>>>
>>
>> Urk, bad idea.
>>
>> The use of Location with MOVE is to be consistent with the semantics 
>> of the 201 response code.
>>
> Tacking on to my previous comment where I said I didn't think Location 
> was REQUIRED with 201...  note that in RFC2518, we had an example of 
> MKCOL, where the response was 201 Created without a Location header:
> 
> 8.3.3 Example - MKCOL
> 
>     This example creates a collection called /webdisc/xfiles/ on the 
> server www.server.org.
> 
>     >>Request
> 
>     MKCOL /webdisc/xfiles/ HTTP/1.1
>     Host: www.server.org
> 
>     >>Response
> 
>     HTTP/1.1 201 Created
> 

Lisa,

would you *please* read the sections from RFC2616 that define this?

Again, from 
<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.14.30>:

"The Location response-header field is used to redirect the recipient to 
a location other than the Request-URI for completion of the request or 
identification of a new resource."

The location isn't different, so no new URI is needed.


Best regards, Julian




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Lisa Dusseault wrote:
> 
> 
> On Oct 27, 2005, at 10:58 AM, Elias Sinderson wrote:
> 
> 
>     Julian Reschke wrote:
> 
>         Proposed resolution for
>         <http://ietf.cse.ucsc.edu:8080/bugzilla/show_bug.cgi?id=23>: [...]
>         NEW:
>         A lock token is a type of state token, represented as a URI, which
>         identifies a particular lock. Each lock has exactly one unique lock
>         token, which is returned upon a successful LOCK creation
>         operation in
>         the "Lock-Token" response header defined in Section 9.6.
> 
> 
>     I have no issues with the proposed text.
> 
> 
>     Cheers,
>     Elias
> 
> 
> It's not just the Lock-Token response header that shows the lock token 
> in response to LOCK, the token also appears in the lockdiscovery 
> property value, which is included in the body of the LOCK response. 

Yes. But does this need to be stated here? The right place to state it 
are the definitions for the LOCK method and the DAV:lockdiscovery 
property. Why repeat it here?

> There's a couple issues that the section on lock tokens should address:
> - how lock tokens relate to locks (one and only one)
> - who generates them, how, and requirements (uniqueness, that clients 
> MUST not interpret)
> - where to get them (Lock-Token response, lockdiscovery property)
> 
> So here's the (work-in-progress) text for the whole section on lock 
> tokens, including my attempts to incorporate several bits of suggested 
> text in a readable order, while also being complete:
> 
> ----
> 
> A lock token is a type of state token, represented as a URI, which 
> identifies a particular lock. Each lock has exactly one unique lock 
> token generated by the server. Clients MUST NOT attempt to interpret 
> lock tokens in any way.
> 
> Lock token URIs MUST be unique across all resources for all time. This 
> uniqueness constraint allows lock tokens to be submitted across 
> resources and servers without fear of confusion.
> 
> When a LOCK operation creates a new lock, the new lock token is returned 
> in the Lock-Token response header defined in Section 9.6 (Lock-Token 
> Header), and also in the body of the response. Also note that lock 
> tokens MUST appear in the 'lockdiscovery' property of a locked resource.

I don't see any benefit of stating this here. What clients are 
interested in is how to get the lock token once they issues the LOCK, 
and the *only* correct answer to that is to use the response header.

Mentioning a different mechanism here would at least require to make 
statements about when it won't work (shared locks), leading to even more 
spec text & confusion.

> Submitting a lock token does not confer full privilege to use the lock 
> token or modify the locked resource. Anyone can find out anyone else's 
> lock token by performing lock discovery. Write access and other 
> privileges MUST be enforced through normal privilege or authentication 
> mechanisms, not based on the slight obscurity of lock token values.
> 
> Since lock tokens are unique, a client MAY submit a lock token in an If 
> header on a resource other than the one that returned it.
> 
> This specification encourages servers to create UUIDs for lock tokens, 
> and to use the URI form defined by Universal Unique Identifier (UUID) 
> [9]. However servers are free to use another valid URI so long as it 

That reference seems to use the wrong title, the spec is called "A 
Universally Unique IDentifier (UUID) URN Namespace".

> meets the uniqueness requirements. For example, a valid lock token might 
> be constructed using the "opaquelocktoken" scheme defined in an appendix 
> of this document.
> 
> Example: "urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6"

Example and text don't match.

> ----
> 
> There were some comments in a previous email from Julian about how the 
> lock token might not appear in the 'lockdiscovery' property if there are 
> multiple (shared) locks on the resource. This statement doesn't fit my 
> understanding, so I haven't yet "fixed" that if I am indeed wrong. 
> Doesn't the 'lockdiscovery' property include every active lock on the 
> resource and all their lock tokens?

Yes.

Best regards, Julian




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Geoffrey M Clemm wrote:
> 
> The last sentence is incorrect.  A lock token appears in a PROPFIND
> lockdiscovery only if the server wishes to expose it.  I have argued
> in the past that a sensible server should never expose a lock token in a
> PROPFIND lockdiscovery, since it just allows a client of a user
> to incorrectly re-use a lock token still in use by another client
> of that user.  So if we say anything, it should "A server SHOULD NOT
> include a lock token in a PROPFIND lockdiscovery, since it introduces
> the possibility of two clients of a given user overwriting each others
> changes".

Here I'll disagree with Geoff :-)

"lock stealing" is further controlled (or can be controlled) by checking 
the principal as well.

I *do* agree that it makes sense to have one coherent section that gives 
advice on how not to reveal lock tokens. For instance, servers are 
allowed to report the locks, but not to disclose the lock tokens (see 
<http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.12.1>).

Best regards, Julian




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This is a multipart message in MIME format.
--=_alternative 0044E435852570A9_=
Content-Type: text/plain; charset="US-ASCII"

The likelihood of damage from lock stealing can be decreased by
only allowing a given user/principal to steal his own locks, but
(as indicated in my original message below :-) it does not prevent
two clients of a given user/principal from overwriting each others
changes.  Since there is a completely safe way of handling this
scenario (i.e., streaming an UNLOCK/LOCK sequence to the server),
I maintain my position that a client should never "steal"
a lock by discovering the lock-token via PROPFIND, even if that
lock was held by another client of that same user, and therefore
lock tokens should never be exposed in a PROPFIND.

Cheers,
Geoff

Geoff wrote on 10/29/2005 04:43:39 AM:
> 
> Geoffrey M Clemm wrote:
> > 
> > The last sentence is incorrect.  A lock token appears in a PROPFIND
> > lockdiscovery only if the server wishes to expose it.  I have argued
> > in the past that a sensible server should never expose a lock token in 
a
> > PROPFIND lockdiscovery, since it just allows a client of a user
> > to incorrectly re-use a lock token still in use by another client
> > of that user.  So if we say anything, it should "A server SHOULD NOT
> > include a lock token in a PROPFIND lockdiscovery, since it introduces
> > the possibility of two clients of a given user overwriting each others
> > changes".
> 
> Here I'll disagree with Geoff :-)
> 
> "lock stealing" is further controlled (or can be controlled) by checking 

> the principal as well.
> 
> I *do* agree that it makes sense to have one coherent section that gives 

> advice on how not to reveal lock tokens. For instance, servers are 
> allowed to report the locks, but not to disclose the lock tokens (see 
> <http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.12.1>).
> 
> Best regards, Julian
> 

--=_alternative 0044E435852570A9_=
Content-Type: text/html; charset="US-ASCII"


<br><font size=2><tt>The likelihood of damage from lock stealing can be
decreased by</tt></font>
<br><font size=2><tt>only allowing a given user/principal to steal his
own locks, but</tt></font>
<br><font size=2><tt>(as indicated in my original message below :-) it
does not prevent</tt></font>
<br><font size=2><tt>two clients of a given user/principal from overwriting
each others</tt></font>
<br><font size=2><tt>changes. &nbsp;Since there is a completely safe way
of handling this</tt></font>
<br><font size=2><tt>scenario (i.e., streaming an UNLOCK/LOCK sequence
to the server),</tt></font>
<br><font size=2><tt>I maintain my position that a client should never
&quot;steal&quot;</tt></font>
<br><font size=2><tt>a lock by discovering the lock-token via PROPFIND,
even if that</tt></font>
<br><font size=2><tt>lock was held by another client of that same user,
and therefore</tt></font>
<br><font size=2><tt>lock tokens should never be exposed in a PROPFIND.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br><font size=2><tt>Geoff wrote on 10/29/2005 04:43:39 AM:<br>
&gt; <br>
&gt; Geoffrey M Clemm wrote:<br>
&gt; &gt; <br>
&gt; &gt; The last sentence is incorrect. &nbsp;A lock token appears in
a PROPFIND<br>
&gt; &gt; lockdiscovery only if the server wishes to expose it. &nbsp;I
have argued<br>
&gt; &gt; in the past that a sensible server should never expose a lock
token in a<br>
&gt; &gt; PROPFIND lockdiscovery, since it just allows a client of a user<br>
&gt; &gt; to incorrectly re-use a lock token still in use by another client<br>
&gt; &gt; of that user. &nbsp;So if we say anything, it should &quot;A
server SHOULD NOT<br>
&gt; &gt; include a lock token in a PROPFIND lockdiscovery, since it introduces<br>
&gt; &gt; the possibility of two clients of a given user overwriting each
others<br>
&gt; &gt; changes&quot;.<br>
&gt; <br>
&gt; Here I'll disagree with Geoff :-)<br>
&gt; <br>
&gt; &quot;lock stealing&quot; is further controlled (or can be controlled)
by checking <br>
&gt; the principal as well.<br>
&gt; <br>
&gt; I *do* agree that it makes sense to have one coherent section that
gives <br>
&gt; advice on how not to reveal lock tokens. For instance, servers are
<br>
&gt; allowed to report the locks, but not to disclose the lock tokens (see
<br>
&gt; &lt;http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.12.1&gt;).<br>
&gt; <br>
&gt; Best regards, Julian<br>
&gt; <br>
</tt></font>
--=_alternative 0044E435852570A9_=--




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This is a multipart message in MIME format.
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I agree that LOCK is the real answer here for WebDAV clients.

But for the "force-authenticate" advocates (which Julian is not):
If we are contrasting "Expect 100-Continue" vs. "force-authenticate", 
I think it would make more sense to advise servers to implement Expect
correctly rather than to introduce a new force-authenticate header.
In particular, why would one believe that a server that doesn't implement
Expect properly would implement force-authenticate properly (or at all).

Cheers,
Geoff

Julian wrote on 10/29/2005 04:20:45 AM:
> 
> Geoffrey M Clemm wrote:
> > 
> > To avoid sending the PUT body twice, why can't a client just
> > use the standard HTTP "Expect 100-Continue" header?
> 
> It could, but it's a known problem that few servers implement that 
> correctly, meaning that the expected header check is indeed skipped (for 

> instance, a server using the servlet API normally doesn't have any 
> chance doing this check, see 
> <http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4812000>).
> 
> > And if a client is proactively checking for authentication preceding
> > a series of PUT calls, then having it just perform an initial 
LOCK/UNLOCK
> > to get the credential challenge doesn't seem like an unreasonable 
overhead
> > (2 initial requests).
> > 
> > So is this just a technique for servers that want to provide this
> > capability but don't want to support LOCK? 
> 
> Seems so, because LOCK seems to be yet another existing way to get what 
> those clients want.
> 
> Best regards, Julian
> 

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<br><font size=2><tt>I agree that LOCK is the real answer here for WebDAV
clients.</tt></font>
<br>
<br><font size=2><tt>But for the &quot;force-authenticate&quot; advocates
(which Julian is not):</tt></font>
<br><font size=2><tt>If we are contrasting &quot;Expect 100-Continue&quot;
vs. &quot;force-authenticate&quot;, </tt></font>
<br><font size=2><tt>I think it would make more sense to advise servers
to implement Expect</tt></font>
<br><font size=2><tt>correctly rather than to introduce a new force-authenticate
header.</tt></font>
<br><font size=2><tt>In particular, why would one believe that a server
that doesn't implement</tt></font>
<br><font size=2><tt>Expect properly would implement force-authenticate
properly (or at all).</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br><font size=2><tt>Julian wrote on 10/29/2005 04:20:45 AM:<br>
&gt; <br>
&gt; Geoffrey M Clemm wrote:<br>
&gt; &gt; <br>
&gt; &gt; To avoid sending the PUT body twice, why can't a client just<br>
&gt; &gt; use the standard HTTP &quot;Expect 100-Continue&quot; header?<br>
&gt; <br>
&gt; It could, but it's a known problem that few servers implement that
<br>
&gt; correctly, meaning that the expected header check is indeed skipped
(for <br>
&gt; instance, a server using the servlet API normally doesn't have any
<br>
&gt; chance doing this check, see <br>
&gt; &lt;http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4812000&gt;).<br>
&gt; <br>
&gt; &gt; And if a client is proactively checking for authentication preceding<br>
&gt; &gt; a series of PUT calls, then having it just perform an initial
LOCK/UNLOCK<br>
&gt; &gt; to get the credential challenge doesn't seem like an unreasonable
overhead<br>
&gt; &gt; (2 initial requests).<br>
&gt; &gt; <br>
&gt; &gt; So is this just a technique for servers that want to provide
this<br>
&gt; &gt; capability but don't want to support LOCK? &nbsp;<br>
&gt; <br>
&gt; Seems so, because LOCK seems to be yet another existing way to get
what <br>
&gt; those clients want.<br>
&gt; <br>
&gt; Best regards, Julian<br>
&gt; <br>
</tt></font>
--=_alternative 00461C1F852570A9_=--




From w3c-dist-auth-request@frink.w3.org Sat Oct 29 09:13:59 2005
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Geoffrey M Clemm wrote:
> 
> The likelihood of damage from lock stealing can be decreased by
> only allowing a given user/principal to steal his own locks, but
> (as indicated in my original message below :-) it does not prevent
> two clients of a given user/principal from overwriting each others
> changes.  Since there is a completely safe way of handling this

Partly correct. Some clients put stuff into DAV:owner in order to ensure 
that they can recognize the locks they created, but of course that's 
lame compared to just remembering which locks one created in the first 
place.

> scenario (i.e., streaming an UNLOCK/LOCK sequence to the server),
> I maintain my position that a client should never "steal"
> a lock by discovering the lock-token via PROPFIND, even if that
> lock was held by another client of that same user, and therefore
> lock tokens should never be exposed in a PROPFIND.

Well, from a purely theoretical point of view, I agree. In practice, 
clients do lock discovery instead of keeping track of their locks on 
their own, so these clients wouldn't work in this case.

BTW: if a server does not want to expose lock tokens, it can also show 
the locks, but leave out the DAV:locktoken child element. Anyway, this 
is certainly a topic where on coherent paragraph would make a lot of sense.

Best regards, Julian




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Clarifying one thing on second read:

Lisa Dusseault wrote:
>...
> There were some comments in a previous email from Julian about how the 
> lock token might not appear in the 'lockdiscovery' property if there are 
> multiple (shared) locks on the resource. This statement doesn't fit my 

No, what I said (or meant to say is) that looking at DAV:lockdiscovery 
in general will not help you at all, because it may contain *multiple* 
entries (Geoff correctly pointed out later that it may not be there at all).

The only *reliable* way to find out the lock token a LOCK request 
created is to look at the "Lock-Token" response header. This is the only 
method that will always work, so please let's not waste time confusing 
people by talking about other methods that may or may not work.

> understanding, so I haven't yet "fixed" that if I am indeed wrong. 
> Doesn't the 'lockdiscovery' property include every active lock on the 
> resource and all their lock tokens?

It includes whatever the server wants to reveal. Citing 
<http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.13.8>:

"The server is free to withhold any or all of this information if the 
requesting principal does not have sufficient access rights to see the 
requested data."

Best regards, Julian




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Combining that with the text already in that section I propose:

    WebDAV uses XML-based identifiers with XML namespaces.
    The use of XML namespaces means that unique WebDAV property names
    and XML elements can be quickly defined by any WebDAV user or
    application, without requiring IANA action.
     The property names and XML elements in this specification
     are all in the "DAV:" namespace.  Creation of identifiers
     in the "DAV:" namespace is controlled by the IETF.


On Oct 29, 2005, at 12:47 AM, Julian Reschke wrote:

> Lisa Dusseault wrote:
>> On Oct 28, 2005, at 2:51 PM, Jim Whitehead wrote:
>>> URI registrations for opaquelocktoken and DAV URI schemes made in 
>>> RFC 2518 should still be considered active."
>>>
>> While looking at the IANA considerations section, this text caught my 
>> eye:
>>    This document defines two namespaces, the namespace of property
>>    names, and the namespace of WebDAV-specific XML elements used 
>> within
>>    property values.
>> I don't count two namespace, just one (DAV:).  any objections if I 
>> fix this sentence?
>
> Yes.
>
> This section defines namespaces (spaces of names), not XML namespaces.
>
> in fact, we have even more spaces of names in use:
>
> - in property values
> - in precondition/postcondition names
> - in resource types
> - in report names (RFC3253)
> - in ACEs (RFC3744)
>
> This probably means that we shouldn't list them all, but simply try to 
> make a generaln statement how WebDAV uses XML-based identifiers in 
> different contexts, and that usage of identifiers in the "DAV:" 
> namespace is controlled by the IETF.
>
> Best regards, Julian
>





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I agree with Julian that if there is a general HTTP problem that needs to
be solved, then it should be handled in a separate draft in a general HTTP
working group, not a RFC-2518 revision.  We have plenty of RFC-2518 
problems
that need to be addressed.

Cheers,
Geoff

Julian wrote on 10/29/2005 04:22:57 AM:

> 
> Lisa Dusseault wrote:
> > No it's not just for LOCK and PUT -- a client doing read-only requests 

> > (like PROPFIND) might see different results depending on whether or 
not 
> > they're authenticated. Some of the resources in a collection might be 
> > publicly readable (so the PROPFIND can succeed if anonymous) but 
others 
> > be hidden to unauthenticated users.
> 
> But you could still use LOCK to enforce authentication, right?
> 
> > More generally, it's not actually a WebDAV problem alone. If a client 
> > does a GET to a dynamically generated page, they could easily see 
> > different results based on whether they're authenticated or not. Since 

> > browsers today often cache authentication information, this means that 

> > the browser could inform the server that they'd like the challenge to 
> > save the user the step of first going to the site, seeing the 
anonymous 
> > page version, then choosing to login. Of course some sites use cookies 

> > for this but cookies are sometimes disabled, expired, etc.
> 
> In which case I would recommend to
> 
> - update Jim's description of the problem accordingly and
> 
> - do this in a separate draft, optimally discussed on the HTTP WG's 
> mailing list.
> 
> Best regards, Julian
> 

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<br><font size=2><tt>I agree with Julian that if there is a general HTTP
problem that needs to</tt></font>
<br><font size=2><tt>be solved, then it should be handled in a separate
draft in a general HTTP</tt></font>
<br><font size=2><tt>working group, not a RFC-2518 revision. &nbsp;We have
plenty of RFC-2518 problems</tt></font>
<br><font size=2><tt>that need to be addressed.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br><font size=2><tt>Julian wrote on 10/29/2005 04:22:57 AM:<br>
<br>
&gt; <br>
&gt; Lisa Dusseault wrote:<br>
&gt; &gt; No it's not just for LOCK and PUT -- a client doing read-only
requests <br>
&gt; &gt; (like PROPFIND) might see different results depending on whether
or not <br>
&gt; &gt; they're authenticated. Some of the resources in a collection
might be <br>
&gt; &gt; publicly readable (so the PROPFIND can succeed if anonymous)
but others <br>
&gt; &gt; be hidden to unauthenticated users.<br>
&gt; <br>
&gt; But you could still use LOCK to enforce authentication, right?<br>
&gt; <br>
&gt; &gt; More generally, it's not actually a WebDAV problem alone. If
a client <br>
&gt; &gt; does a GET to a dynamically generated page, they could easily
see <br>
&gt; &gt; different results based on whether they're authenticated or not.
Since <br>
&gt; &gt; browsers today often cache authentication information, this means
that <br>
&gt; &gt; the browser could inform the server that they'd like the challenge
to <br>
&gt; &gt; save the user the step of first going to the site, seeing the
anonymous <br>
&gt; &gt; page version, then choosing to login. Of course some sites use
cookies <br>
&gt; &gt; for this but cookies are sometimes disabled, expired, etc.<br>
&gt; <br>
&gt; In which case I would recommend to<br>
&gt; <br>
&gt; - update Jim's description of the problem accordingly and<br>
&gt; <br>
&gt; - do this in a separate draft, optimally discussed on the HTTP WG's
<br>
&gt; mailing list.<br>
&gt; <br>
&gt; Best regards, Julian<br>
&gt; <br>
</tt></font>
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From: Lisa Dusseault <lisa@osafoundation.org>
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--Apple-Mail-19--178256337
Content-Type: text/plain;
	charset=ISO-8859-1;
	format=flowed
Content-Transfer-Encoding: quoted-printable

So if you wanted to browse a collection, and see all the=20
non-publicly-readable resources alongside the publicly readable=20
resources, you'd try to LOCK that collection?  That's actually a state=20=

change if it succeeds, may have significant side effects.

Expect is a reasonable solution in theory.  However, it's harder to=20
implement, which is why a simpler mechanism might see more=20
implementation.
   - Expect requires the server to maintain more state, for longer,=20
while the client gets back with the rest of the request (when a success=20=

response happens).  It's unique in splitting the request and response=20
up.
  - Expect could be subject to trivial DOS attacks.
   - As Julian pointed out, Java servlet engines don't allow this kind=20=

of flexibility, while a servlet could implement Force-Authenticate (or=20=

something similar) without requiring changes in the servlet engine. =20
There are probably similar restrictions in other cases -- maybe IIS'=20
API, Apache's module API, I don't know.

Are there any other solutions?  To throw out some possibilities no=20
matter how cheesy:

1.  A LOGIN method (while it would make purists scream) could be=20
defined such that it always caused an authentication challenge.  (It=20
wouldn't keep the user logged in for every subsequent request -- only=20
requests which continued to have the right auth header from then on.)

2. If the client knows it wants to authenticate, perhaps it could send=20=

an Authorization header on its very first request.  Because the client=20=

doesn't want to actually reveal any username or password until it has=20
learned the 'realm' value, the header value has to be bogus.

        PROPFIND / HTTP/1.1
        Authorization: Basic BOGUSSTRING:BASE64ENCODED

With Basic, the server either reject Basic auth entirely, or try to=20
decompose the string. The username portion would be looked up in the=20
user database.  There's always a chance that a valid user name would=20
exist for whatever bogus string was chosen.

Using Digest, there's an opportunity to use a bogus realm:

       Authorization: Digest realm=3D"CHALLENGE"

So another variation is to send an Auth header that's neither Basic or=20=

Digest:

       Authorization: CHALLENGEME

Existing servers would probably return 400 Bad Request or Not=20
Implemented to the above 2, so such a plan would have to be widely=20
disseminated so servers could change.

All of these Auth header hacks are in some sense inferior to the=20
clean-ness of defining Force-Authenticate, but that's just an aesthetic=20=

opinion.

Lisa

On Oct 29, 2005, at 5:45 AM, Geoffrey M Clemm wrote:

>
> I agree that LOCK is the real answer here for WebDAV clients.
>
> But for the "force-authenticate" advocates (which Julian is not):
> If we are contrasting "Expect 100-Continue" vs. "force-authenticate",
> I think it would make more sense to advise servers to implement Expect
> correctly rather than to introduce a new force-authenticate header.
> In particular, why would one believe that a server that doesn't=20
> implement
> Expect properly would implement force-authenticate properly (or at=20
> all).
>
> Cheers,
> Geoff
>
> Julian wrote on 10/29/2005 04:20:45 AM:
>  >
>  > Geoffrey M Clemm wrote:
>  > >
>  > > To avoid sending the PUT body twice, why can't a client just
>  > > use the standard HTTP "Expect 100-Continue" header?
>  >
>  > It could, but it's a known problem that few servers implement that
>  > correctly, meaning that the expected header check is indeed skipped=20=

> (for
>  > instance, a server using the servlet API normally doesn't have any
>  > chance doing this check, see
>  > <http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=3D4812000>).
>  >
>  > > And if a client is proactively checking for authentication=20
> preceding
>  > > a series of PUT calls, then having it just perform an initial=20
> LOCK/UNLOCK
>  > > to get the credential challenge doesn't seem like an unreasonable=20=

> overhead
>  > > (2 initial requests).
>  > >
>  > > So is this just a technique for servers that want to provide this
>  > > capability but don't want to support LOCK? =A0
>  >
>  > Seems so, because LOCK seems to be yet another existing way to get=20=

> what
>  > those clients want.
>  >
>  > Best regards, Julian
>  >

--Apple-Mail-19--178256337
Content-Type: text/enriched;
	charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

So if you wanted to browse a collection, and see all the
non-publicly-readable resources alongside the publicly readable
resources, you'd try to LOCK that collection?  That's actually a state
change if it succeeds, may have significant side effects.


Expect is a reasonable solution in theory.  However, it's harder to
implement, which is why a simpler mechanism might see more
implementation.

  - Expect requires the server to maintain more state, for longer,
while the client gets back with the rest of the request (when a
success response happens).  It's unique in splitting the request and
response up.

 - Expect could be subject to trivial DOS attacks.

  - As Julian pointed out, Java servlet engines don't allow this kind
of flexibility, while a servlet could implement Force-Authenticate (or
something similar) without requiring changes in the servlet engine.=20
There are probably similar restrictions in other cases -- maybe IIS'
API, Apache's module API, I don't know.


Are there any other solutions?  To throw out some possibilities no
matter how cheesy:


1.  A LOGIN method (while it would make purists scream) could be
defined such that it always caused an authentication challenge.  (It
wouldn't keep the user logged in for every subsequent request -- only
requests which continued to have the right auth header from then on.)


2. If the client knows it wants to authenticate, perhaps it could send
an Authorization header on its very first request.  Because the client
doesn't want to actually reveal any username or password until it has
learned the 'realm' value, the header value has to be bogus.=20


       PROPFIND / HTTP/1.1

       Authorization: Basic BOGUSSTRING:BASE64ENCODED


With Basic, the server either reject Basic auth entirely, or try to
decompose the string. The username portion would be looked up in the
user database.  There's always a chance that a valid user name would
exist for whatever bogus string was chosen.


Using Digest, there's an opportunity to use a bogus realm:


      Authorization: Digest realm=3D"CHALLENGE"=20


So another variation is to send an Auth header that's neither Basic or
Digest:


      Authorization: CHALLENGEME


Existing servers would probably return 400 Bad Request or Not
Implemented to the above 2, so such a plan would have to be widely
disseminated so servers could change.


All of these Auth header hacks are in some sense inferior to the
clean-ness of defining Force-Authenticate, but that's just an
aesthetic opinion.


Lisa


On Oct 29, 2005, at 5:45 AM, Geoffrey M Clemm wrote:


<excerpt>

<fixed><x-tad-smaller>I agree that LOCK is the real answer here for
WebDAV clients.</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>But for the "force-authenticate" advocates
(which Julian is not):</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>If we are contrasting "Expect 100-Continue" vs.
"force-authenticate",</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>I think it would make more sense to advise
servers to implement Expect</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>correctly rather than to introduce a new
force-authenticate header.</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>In particular, why would one believe that a
server that doesn't implement</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>Expect properly would implement
force-authenticate properly (or at all).</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>Cheers,</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>Geoff</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>Julian wrote on 10/29/2005 04:20:45 =
AM:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Geoffrey M Clemm wrote:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > To avoid sending the PUT body twice, why
can't a client just</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > use the standard HTTP "Expect 100-Continue"
header?</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > It could, but it's a known problem that few
servers implement that </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > correctly, meaning that the expected header
check is indeed skipped (for </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > instance, a server using the servlet API
normally doesn't have any </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > chance doing this check, see =
</x-tad-smaller></fixed>

<fixed><x-tad-smaller> >
=
<<http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=3D4812000>).</x-tad-s=
maller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > And if a client is proactively checking for
authentication preceding</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > a series of PUT calls, then having it just
perform an initial LOCK/UNLOCK</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > to get the credential challenge doesn't
seem like an unreasonable overhead</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > (2 initial requests).</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > So is this just a technique for servers
that want to provide this</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > capability but don't want to support LOCK? =
=A0</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Seems so, because LOCK seems to be yet
another existing way to get what </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > those clients want.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Best regards, Julian</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

</excerpt>=

--Apple-Mail-19--178256337--





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On Oct 29, 2005, at 6:15 AM, Julian Reschke wrote:

> Clarifying one thing on second read:
>
> Lisa Dusseault wrote:
>> ...
>> There were some comments in a previous email from Julian about how 
>> the lock token might not appear in the 'lockdiscovery' property if 
>> there are multiple (shared) locks on the resource. This statement 
>> doesn't fit my
>
> No, what I said (or meant to say is) that looking at DAV:lockdiscovery 
> in general will not help you at all, because it may contain *multiple* 
> entries (Geoff correctly pointed out later that it may not be there at 
> all).
>
> The only *reliable* way to find out the lock token a LOCK request 
> created is to look at the "Lock-Token" response header. This is the 
> only method that will always work, so please let's not waste time 
> confusing people by talking about other methods that may or may not 
> work.
>
Ok, I understand now why the lockdiscovery property is unreliable for 
this purpose.  But what about the body of the LOCK response (in 
addition to the Lock-Token header)?

Lisa





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From: Lisa Dusseault <lisa@osafoundation.org>
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On Oct 29, 2005, at 1:32 AM, Julian Reschke wrote:

> Lisa Dusseault wrote:
>> On Oct 28, 2005, at 3:13 PM, Jim Whitehead wrote:
>>>> What if I remove the header from the response example, in addition 
>>>> to Jim's suggested change?
>>>>
>>>
>>> Urk, bad idea.
>>>
>>> The use of Location with MOVE is to be consistent with the semantics 
>>> of the 201 response code.
>>>
>> Tacking on to my previous comment where I said I didn't think 
>> Location was REQUIRED with 201...  note that in RFC2518, we had an 
>> example of MKCOL, where the response was 201 Created without a 
>> Location header:
>> 8.3.3 Example - MKCOL
>>     This example creates a collection called /webdisc/xfiles/ on the 
>> server www.server.org.
>>     >>Request
>>     MKCOL /webdisc/xfiles/ HTTP/1.1
>>     Host: www.server.org
>>     >>Response
>>     HTTP/1.1 201 Created
>
> Lisa,
>
> would you *please* read the sections from RFC2616 that define this?
>
> Again, from 
> <http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.14.30>:
>
> "The Location response-header field is used to redirect the recipient 
> to a location other than the Request-URI for completion of the request 
> or identification of a new resource."
>
> The location isn't different, so no new URI is needed.
>
>
> Best regards, Julian

Julian,  I have read RFC2616.  I read the relevant section immediately 
before posting which is why I thought that Location was probably not 
required with 201 Created, for the reasons you state.  If you think 
we're saying something different, *please* explain why.

Lisa





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Lisa Dusseault wrote:
> ...
> Ok, I understand now why the lockdiscovery property is unreliable for 
> this purpose.  But what about the body of the LOCK response (in addition 
> to the Lock-Token header)?

It's the same: 
<http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.8.10.1>:

"The response MUST contain the value of the lockdiscovery property in a 
prop XML element."

Best regards, Julian




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Lisa Dusseault wrote:
> So if you wanted to browse a collection, and see all the 
> non-publicly-readable resources alongside the publicly readable 
> resources, you'd try to LOCK that collection? That's actually a state 
> change if it succeeds, may have significant side effects.
> 
> Expect is a reasonable solution in theory. However, it's harder to 
> implement, which is why a simpler mechanism might see more implementation.
> - Expect requires the server to maintain more state, for longer, while 
> the client gets back with the rest of the request (when a success 
> response happens). It's unique in splitting the request and response up.

I'm not sure I understand this. Using Expect: 100-continue only means 
that the server has a chance to reject the request before the body is 
sent. What am I missing here?

> - Expect could be subject to trivial DOS attacks.

Please explain.

> - As Julian pointed out, Java servlet engines don't allow this kind of 
> flexibility, while a servlet could implement Force-Authenticate (or 
> something similar) without requiring changes in the servlet engine. 
> There are probably similar restrictions in other cases -- maybe IIS' 
> API, Apache's module API, I don't know.

To me that means that the servlet engines should be enhanced, just like 
in the bug description I posted.

Statements about other servers are really just hand-waving, unless you 
have solid information.

> ...

Anyway: this is not a WebDAV problem. Compile a problem statement, and 
try to get people working on a separate specification. Possibly on the 
http WG mailing list.

Best regards, Julian




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On Oct 29, 2005, at 8:58 AM, Julian Reschke wrote:

>
> Lisa Dusseault wrote:
>> ...
>> Ok, I understand now why the lockdiscovery property is unreliable for 
>> this purpose.  But what about the body of the LOCK response (in 
>> addition to the Lock-Token header)?
>
> It's the same: 
> <http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.8.10.1>:
>
> "The response MUST contain the value of the lockdiscovery property in 
> a prop XML element."
>
> Best regards, Julian
>
>
Yes, and MUST the lock token appear in that context? This is important 
because some clients pull the lock token value from the body of the 
request.  When we tested this in interop testing, we found some clients 
used the body and some used the header, and we had decided at that 
point to allow that to continue happening and make servers put the 
token in both places.

Lisa





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References: <200510151829.j9FIT7PU023853@ietf.cse.ucsc.edu> <43514FBF.9040502@gmx.de> <4361152A.5030403@cse.ucsc.edu> <c79ea955e419d09f6b557f50473d97bd@osafoundation.org> <436375F8.3060703@gmx.de> <8eaf9241d62055518696cf3f434114e1@osafoundation.org> <43639C2E.3040109@gmx.de> <f738ece3885e7dbffa9386e7fca9a07f@osafoundation.org>
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Lisa Dusseault wrote:
>> It's the same: 
>> <http://greenbytes.de/tech/webdav/rfc2518.html#rfc.section.8.10.1>:
>>
>> "The response MUST contain the value of the lockdiscovery property in 
>> a prop XML element."
>>
>> Best regards, Julian
>>
>>
> Yes, and MUST the lock token appear in that context? This is important 

Again, it's the same. So no, it doesn't have to. It's all in RFC2518.

> because some clients pull the lock token value from the body of the 
> request.  When we tested this in interop testing, we found some clients 

That's a bug. The best way to keep people from doing it is to tell them 
to use the Lock-Token response header.

> used the body and some used the header, and we had decided at that point 
> to allow that to continue happening and make servers put the token in 
> both places.

Who is "we" in this context?

Best regards, Julian





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Length:           60 minutes
Frequency:        Every Wednesday for 8 weeks.
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This is a multipart message in MIME format.
--=_alternative 00159A07852570AA_=
Content-Type: text/plain; charset="US-ASCII"

To be clear, I am completely in favor of a server exposing all of
the locks on a resource to an authorized user ... I am only against
revealing the lock-token in the information on the lock.

As for clients that use lock-discovery instead of keeping track of
lock tokens, their implementor clearly didn't understand the purpose
of a lock token (preventing a user from overwriting his own changes from
another of his clients), and the specification should make this mistake
clear, and not encourage it.

So I agree with Julian's final suggestion that this issue merits a
paragraph guiding clients on how to use lock tokens properly, and
guiding servers on how to deal with poorly implemented clients.

Cheers,
Geoff


Julian wrote on 10/29/2005 09:12:06 AM:

> 
> Geoffrey M Clemm wrote:
> > 
> > The likelihood of damage from lock stealing can be decreased by
> > only allowing a given user/principal to steal his own locks, but
> > (as indicated in my original message below :-) it does not prevent
> > two clients of a given user/principal from overwriting each others
> > changes.  Since there is a completely safe way of handling this
> 
> Partly correct. Some clients put stuff into DAV:owner in order to ensure 

> that they can recognize the locks they created, but of course that's 
> lame compared to just remembering which locks one created in the first 
> place.
> 
> > scenario (i.e., streaming an UNLOCK/LOCK sequence to the server),
> > I maintain my position that a client should never "steal"
> > a lock by discovering the lock-token via PROPFIND, even if that
> > lock was held by another client of that same user, and therefore
> > lock tokens should never be exposed in a PROPFIND.
> 
> Well, from a purely theoretical point of view, I agree. In practice, 
> clients do lock discovery instead of keeping track of their locks on 
> their own, so these clients wouldn't work in this case.
> 
> BTW: if a server does not want to expose lock tokens, it can also show 
> the locks, but leave out the DAV:locktoken child element. Anyway, this 
> is certainly a topic where on coherent paragraph would make a lot of 
sense.
> 
> Best regards, Julian
> 

--=_alternative 00159A07852570AA_=
Content-Type: text/html; charset="US-ASCII"


<br><font size=2><tt>To be clear, I am completely in favor of a server
exposing all of</tt></font>
<br><font size=2><tt>the locks on a resource to an authorized user ...
I am only against</tt></font>
<br><font size=2><tt>revealing the lock-token in the information on the
lock.</tt></font>
<br>
<br><font size=2><tt>As for clients that use lock-discovery instead of
keeping track of</tt></font>
<br><font size=2><tt>lock tokens, their implementor clearly didn't understand
the purpose</tt></font>
<br><font size=2><tt>of a lock token (preventing a user from overwriting
his own changes from</tt></font>
<br><font size=2><tt>another of his clients), and the specification should
make this mistake</tt></font>
<br><font size=2><tt>clear, and not encourage it.</tt></font>
<br>
<br><font size=2><tt>So I agree with Julian's final suggestion that this
issue merits a</tt></font>
<br><font size=2><tt>paragraph guiding clients on how to use lock tokens
properly, and</tt></font>
<br><font size=2><tt>guiding servers on how to deal with poorly implemented
clients.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br>
<br><font size=2><tt>Julian wrote on 10/29/2005 09:12:06 AM:<br>
<br>
&gt; <br>
&gt; Geoffrey M Clemm wrote:<br>
&gt; &gt; <br>
&gt; &gt; The likelihood of damage from lock stealing can be decreased
by<br>
&gt; &gt; only allowing a given user/principal to steal his own locks,
but<br>
&gt; &gt; (as indicated in my original message below :-) it does not prevent<br>
&gt; &gt; two clients of a given user/principal from overwriting each others<br>
&gt; &gt; changes. &nbsp;Since there is a completely safe way of handling
this<br>
&gt; <br>
&gt; Partly correct. Some clients put stuff into DAV:owner in order to
ensure <br>
&gt; that they can recognize the locks they created, but of course that's
<br>
&gt; lame compared to just remembering which locks one created in the first
<br>
&gt; place.<br>
&gt; <br>
&gt; &gt; scenario (i.e., streaming an UNLOCK/LOCK sequence to the server),<br>
&gt; &gt; I maintain my position that a client should never &quot;steal&quot;<br>
&gt; &gt; a lock by discovering the lock-token via PROPFIND, even if that<br>
&gt; &gt; lock was held by another client of that same user, and therefore<br>
&gt; &gt; lock tokens should never be exposed in a PROPFIND.<br>
&gt; <br>
&gt; Well, from a purely theoretical point of view, I agree. In practice,
<br>
&gt; clients do lock discovery instead of keeping track of their locks
on <br>
&gt; their own, so these clients wouldn't work in this case.<br>
&gt; <br>
&gt; BTW: if a server does not want to expose lock tokens, it can also
show <br>
&gt; the locks, but leave out the DAV:locktoken child element. Anyway,
this <br>
&gt; is certainly a topic where on coherent paragraph would make a lot
of sense.<br>
&gt; <br>
&gt; Best regards, Julian<br>
&gt; <br>
</tt></font>
--=_alternative 00159A07852570AA_=--




From jamesm@surfeador.com Sun Oct 30 04:14:48 2005
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Lisa Dusseault wrote:
> Combining that with the text already in that section I propose:
> 
>    WebDAV uses XML-based identifiers with XML namespaces.
>    The use of XML namespaces means that unique WebDAV property names
>    and XML elements can be quickly defined by any WebDAV user or
>    application, without requiring IANA action.
>     The property names and XML elements in this specification
>     are all in the "DAV:" namespace.  Creation of identifiers
>     in the "DAV:" namespace is controlled by the IETF.

Could you please post the complete section? I'm not sure where this text 
is supposed to be added, or whether it replaces something that is 
already there.

Best regards, Julian




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On 10/30/05 3:38 AM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> 
> Lisa Dusseault wrote:
>> Combining that with the text already in that section I propose:
>> 
>>    WebDAV uses XML-based identifiers with XML namespaces.
>>    The use of XML namespaces means that unique WebDAV property names
>>    and XML elements can be quickly defined by any WebDAV user or
>>    application, without requiring IANA action.
>>     The property names and XML elements in this specification
>>     are all in the "DAV:" namespace.  Creation of identifiers
>>     in the "DAV:" namespace is controlled by the IETF.
> 
> Could you please post the complete section? I'm not sure where this text
> is supposed to be added, or whether it replaces something that is
> already there.
> 
> Best regards, Julian

Julian, in the above paragraph, if we replaced '"DAV:" namespace' with
something like '"DAV:" namespace hierarchy' would that be correct? I don't
know how to say this by do you have some text that you think would correctly
say the essence of what the above paragraph is trying to get at?





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--Apple-Mail-1--91020525
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I mostly agree with this, except with the problem of failed clients. =20
If I use a WebDAV client that crashes and loses its locks, or has a bug=20=

and fails to unlock -- or if I'm testing client or server software -- I=20=

need a way to get the lock token to remove it as a last resort.

So yes, while clients SHOULD get the lock token on LOCK response and=20
remember it, there needs to be a way to recover without administrator=20
intervention.

Lisa

On Oct 29, 2005, at 8:55 PM, Geoffrey M Clemm wrote:

>
> To be clear, I am completely in favor of a server exposing all of
> the locks on a resource to an authorized user ... I am only against
> revealing the lock-token in the information on the lock.
>
> As for clients that use lock-discovery instead of keeping track of
> lock tokens, their implementor clearly didn't understand the purpose
> of a lock token (preventing a user from overwriting his own changes=20
> from
> another of his clients), and the specification should make this =
mistake
> clear, and not encourage it.
>
> So I agree with Julian's final suggestion that this issue merits a
> paragraph guiding clients on how to use lock tokens properly, and
> guiding servers on how to deal with poorly implemented clients.
>
> Cheers,
> Geoff
>
>
> Julian wrote on 10/29/2005 09:12:06 AM:
>
>  >
>  > Geoffrey M Clemm wrote:
>  > >
>  > > The likelihood of damage from lock stealing can be decreased by
>  > > only allowing a given user/principal to steal his own locks, but
>  > > (as indicated in my original message below :-) it does not =
prevent
>  > > two clients of a given user/principal from overwriting each =
others
>  > > changes. =A0Since there is a completely safe way of handling this
>  >
>  > Partly correct. Some clients put stuff into DAV:owner in order to=20=

> ensure
>  > that they can recognize the locks they created, but of course =
that's
>  > lame compared to just remembering which locks one created in the=20
> first
>  > place.
>  >
>  > > scenario (i.e., streaming an UNLOCK/LOCK sequence to the server),
>  > > I maintain my position that a client should never "steal"
>  > > a lock by discovering the lock-token via PROPFIND, even if that
>  > > lock was held by another client of that same user, and therefore
>  > > lock tokens should never be exposed in a PROPFIND.
>  >
>  > Well, from a purely theoretical point of view, I agree. In =
practice,
>  > clients do lock discovery instead of keeping track of their locks =
on
>  > their own, so these clients wouldn't work in this case.
>  >
>  > BTW: if a server does not want to expose lock tokens, it can also=20=

> show
>  > the locks, but leave out the DAV:locktoken child element. Anyway,=20=

> this
>  > is certainly a topic where on coherent paragraph would make a lot=20=

> of sense.
>  >
>  > Best regards, Julian
>  >

--Apple-Mail-1--91020525
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	charset=ISO-8859-1
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I mostly agree with this, except with the problem of failed clients.=20
If I use a WebDAV client that crashes and loses its locks, or has a
bug and fails to unlock -- or if I'm testing client or server software
-- I need a way to get the lock token to remove it as a last resort. =20


So yes, while clients SHOULD get the lock token on LOCK response and
remember it, there needs to be a way to recover without administrator
intervention.


Lisa


On Oct 29, 2005, at 8:55 PM, Geoffrey M Clemm wrote:


<excerpt>

<fixed><x-tad-smaller>To be clear, I am completely in favor of a
server exposing all of</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>the locks on a resource to an authorized user
... I am only against</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>revealing the lock-token in the information on
the lock.</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>As for clients that use lock-discovery instead
of keeping track of</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>lock tokens, their implementor clearly didn't
understand the purpose</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>of a lock token (preventing a user from
overwriting his own changes from</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>another of his clients), and the specification
should make this mistake</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>clear, and not encourage
it.</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>So I agree with Julian's final suggestion that
this issue merits a</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>paragraph guiding clients on how to use lock
tokens properly, and</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>guiding servers on how to deal with poorly
implemented clients.</x-tad-smaller></fixed>=20


<fixed><x-tad-smaller>Cheers,</x-tad-smaller></fixed>=20

<fixed><x-tad-smaller>Geoff</x-tad-smaller></fixed>=20



<fixed><x-tad-smaller>Julian wrote on 10/29/2005 09:12:06 =
AM:</x-tad-smaller></fixed>


<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Geoffrey M Clemm wrote:</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > The likelihood of damage from lock stealing
can be decreased by</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > only allowing a given user/principal to
steal his own locks, but</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > (as indicated in my original message below
:-) it does not prevent</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > two clients of a given user/principal from
overwriting each others</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > changes. =A0Since there is a completely safe
way of handling this</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Partly correct. Some clients put stuff into
DAV:owner in order to ensure </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > that they can recognize the locks they
created, but of course that's </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > lame compared to just remembering which locks
one created in the first </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > place.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > scenario (i.e., streaming an UNLOCK/LOCK
sequence to the server),</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > I maintain my position that a client should
never "steal"</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > a lock by discovering the lock-token via
PROPFIND, even if that</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > lock was held by another client of that
same user, and therefore</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > > lock tokens should never be exposed in a
PROPFIND.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Well, from a purely theoretical point of
view, I agree. In practice, </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > clients do lock discovery instead of keeping
track of their locks on </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > their own, so these clients wouldn't work in
this case.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > BTW: if a server does not want to expose lock
tokens, it can also show </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > the locks, but leave out the DAV:locktoken
child element. Anyway, this </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > is certainly a topic where on coherent
paragraph would make a lot of sense.</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

<fixed><x-tad-smaller> > Best regards, Julian</x-tad-smaller></fixed>

<fixed><x-tad-smaller> > </x-tad-smaller></fixed>

</excerpt>=

--Apple-Mail-1--91020525--





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On 10/27/05 11:21 AM, "Elias Sinderson" <elias@cse.ucsc.edu> wrote:

> 
> I am okay with the change, below.
> 
> Best,
> Elias
> 
> 
> Julian Reschke wrote:
> 
>> For the record, the change is:
>> Section 8., para. 61:
>> OLD:
>>     This example also demonstrates the use of XML namespace scoping and
>>     the default namespace.  Since the "xmlns" attribute does not contain
>>     a prefix, the namespace applies by default to all enclosed elements.
>>     Hence, all elements which do not explicitly state the namespace to
>>     which they belong are members of the "DAV:" namespace schema.
>> 
>> NEW:
>>     This example also demonstrates the use of XML namespace scoping and
>>     the default namespace.  Since the "xmlns" attribute does not contain
>>     a prefix, the namespace applies by default to all enclosed elements.
>>     Hence, all elements which do not explicitly state the namespace to
>>     which they belong are members of the "DAV:" namespace.

Uh, I'm probably blind, but what is the difference from the old to the new?




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        Jim Whitehead <ejw@soe.ucsc.edu>
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On 10/28/05 8:24 PM, "Geoffrey M Clemm" <geoffrey.clemm@us.ibm.com> wrote:

> 
> +1 for either Jim's suggested text or saying nothing,
> and +1 that we then close this issue.
> 
> Cheers, 
> Geoff 

So I am a client implementer, should I do anything with the Location header
in a 207 or should I just always ignore it?





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Cullen Jennings wrote:
> On 10/28/05 8:24 PM, "Geoffrey M Clemm" <geoffrey.clemm@us.ibm.com> wrote:
> 
> 
>>+1 for either Jim's suggested text or saying nothing,
>>and +1 that we then close this issue.
>>
>>Cheers, 
>>Geoff 
> 
> 
> So I am a client implementer, should I do anything with the Location header
> in a 207 or should I just always ignore it?

<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.14.30>:

"The Location response-header field is used to redirect the recipient to 
a location other than the Request-URI for completion of the request or 
identification of a new resource."

The first part is for redirects (3xx), the second one for creation of 
resources (201). So right now HTTP doesn't seem to define anything for 
other response codes, so a recipient can ignore it. However, future 
revisions of RFC2616 (or other protocol extensions) may want to use it 
in more scenarios, so AFAIK we should *not* say anything more here.

Best regards, Julian





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Cullen Jennings wrote:
> On 10/27/05 11:21 AM, "Elias Sinderson" <elias@cse.ucsc.edu> wrote:
> 
> 
>>I am okay with the change, below.
>>
>>Best,
>>Elias
>>
>>
>>Julian Reschke wrote:
>>
>>
>>>For the record, the change is:
>>>Section 8., para. 61:
>>>OLD:
>>>    This example also demonstrates the use of XML namespace scoping and
>>>    the default namespace.  Since the "xmlns" attribute does not contain
>>>    a prefix, the namespace applies by default to all enclosed elements.
>>>    Hence, all elements which do not explicitly state the namespace to
>>>    which they belong are members of the "DAV:" namespace schema.
>>>
>>>NEW:
>>>    This example also demonstrates the use of XML namespace scoping and
>>>    the default namespace.  Since the "xmlns" attribute does not contain
>>>    a prefix, the namespace applies by default to all enclosed elements.
>>>    Hence, all elements which do not explicitly state the namespace to
>>>    which they belong are members of the "DAV:" namespace.
> 
> 
> Uh, I'm probably blind, but what is the difference from the old to the new?

Last sentence, last word.

Best regards, Julian




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I have requested publication of redirect as Experimental (but still a WG
product)






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Thread-Topic: [Bug 17] XML NS terminology
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On 10/30/05 2:57 PM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> Cullen Jennings wrote:
>> On 10/27/05 11:21 AM, "Elias Sinderson" <elias@cse.ucsc.edu> wrote:
>> 
>> 
>>> I am okay with the change, below.
>>> 
>>> Best,
>>> Elias
>>> 
>>> 
>>> Julian Reschke wrote:
>>> 
>>> 
>>>> For the record, the change is:
>>>> Section 8., para. 61:
>>>> OLD:
>>>>    This example also demonstrates the use of XML namespace scoping and
>>>>    the default namespace.  Since the "xmlns" attribute does not contain
>>>>    a prefix, the namespace applies by default to all enclosed elements.
>>>>    Hence, all elements which do not explicitly state the namespace to
>>>>    which they belong are members of the "DAV:" namespace schema.
>>>> 
>>>> NEW:
>>>>    This example also demonstrates the use of XML namespace scoping and
>>>>    the default namespace.  Since the "xmlns" attribute does not contain
>>>>    a prefix, the namespace applies by default to all enclosed elements.
>>>>    Hence, all elements which do not explicitly state the namespace to
>>>>    which they belong are members of the "DAV:" namespace.
>> 
>> 
>> Uh, I'm probably blind, but what is the difference from the old to the new?
> 
> Last sentence, last word.
> 
> Best regards, Julian

Gotit - thanks - I looked at that about 10 times before I sent my email.




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This is a multipart message in MIME format.
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You would do the same as what you would always do with a Location
header in a response, i.e., use the URL specified in the Location header
the next time you wanted to apply a method to the resource.

Cheers,
Geoff

Cullen Jennings <fluffy@cisco.com> wrote on 10/30/2005 02:53:15 PM:

> On 10/28/05 8:24 PM, "Geoffrey M Clemm" <geoffrey.clemm@us.ibm.com> 
wrote:
> 
> > 
> > +1 for either Jim's suggested text or saying nothing,
> > and +1 that we then close this issue.
> > 
> > Cheers, 
> > Geoff 
> 
> So I am a client implementer, should I do anything with the Location 
header
> in a 207 or should I just always ignore it?
> 

--=_alternative 0042ECC4852570AB_=
Content-Type: text/html; charset="US-ASCII"


<br><font size=2><tt>You would do the same as what you would always do
with a Location</tt></font>
<br><font size=2><tt>header in a response, i.e., use the URL specified
in the Location header</tt></font>
<br><font size=2><tt>the next time you wanted to apply a method to the
resource.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br><font size=2><tt>Cullen Jennings &lt;fluffy@cisco.com&gt; wrote on
10/30/2005 02:53:15 PM:<br>
<br>
&gt; On 10/28/05 8:24 PM, &quot;Geoffrey M Clemm&quot; &lt;geoffrey.clemm@us.ibm.com&gt;
wrote:<br>
&gt; <br>
&gt; &gt; <br>
&gt; &gt; +1 for either Jim's suggested text or saying nothing,<br>
&gt; &gt; and +1 that we then close this issue.<br>
&gt; &gt; <br>
&gt; &gt; Cheers, <br>
&gt; &gt; Geoff <br>
&gt; <br>
&gt; So I am a client implementer, should I do anything with the Location
header<br>
&gt; in a 207 or should I just always ignore it?<br>
&gt; <br>
</tt></font>
--=_alternative 0042ECC4852570AB_=--




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On Oct 29, 2005, at 1:22 AM, Julian Reschke wrote:

>> More generally, it's not actually a WebDAV problem alone. If a  
>> client does a GET to a dynamically generated page, they could  
>> easily see different results based on whether they're  
>> authenticated or not. Since browsers today often cache  
>> authentication information, this means that the browser could  
>> inform the server that they'd like the challenge to save the user  
>> the step of first going to the site, seeing the anonymous page  
>> version, then choosing to login. Of course some sites use cookies  
>> for this but cookies are sometimes disabled, expired, etc.
>
> In which case I would recommend to
>
> - update Jim's description of the problem accordingly and
>
> - do this in a separate draft, optimally discussed on the HTTP WG's  
> mailing list.

I agree with those who have said this is not a WebDAV specific issue.  
It should be discussed as a separate HTTP issue.

- Jim





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There are two issues with Expect 100-continue:

* It is only permitted for methods with request bodies -- it would be  
far better for a client to have a single mechanism that worked for  
all methods.
* The server's behavior after sending a final status code (i.e., a  
4xx) is not great -- either read the entire request body and send to / 
dev/null, or drop the TCP connection. It would be far better if the  
client never sent the request body in the first place.
* From reading the HTTP specification, it's really unclear to me how  
Expect 100-continue works with proxy authentication. It almost seems  
as if this mechanism allows you to bypass proxy authentication.

However, I still think the right action here is:

* Create a new appendix in 2518bis
* In this appendix, document the problem
* Describe the known approaches for addressing the problem (If  
approach, 100-continue approach) and their issues
* Create a separate draft focusing just on the Force-Authenticate  
approach, and discuss on HTTP-WG list.

Julian seems to think this is an OK approach. Geoff seems to think  
this is OK. Jim Luther agrees with the separate draft part.

Dang if that doesn't seem like something approaching rough consensus  
to me.

- Jim

On Oct 29, 2005, at 5:45 AM, Geoffrey M Clemm wrote:

>
> I agree that LOCK is the real answer here for WebDAV clients.
>
> But for the "force-authenticate" advocates (which Julian is not):
> If we are contrasting "Expect 100-Continue" vs. "force-authenticate",
> I think it would make more sense to advise servers to implement Expect
> correctly rather than to introduce a new force-authenticate header.
> In particular, why would one believe that a server that doesn't  
> implement
> Expect properly would implement force-authenticate properly (or at  
> all).
>
> Cheers,
> Geoff
>
> Julian wrote on 10/29/2005 04:20:45 AM:
> >
> > Geoffrey M Clemm wrote:
> > >
> > > To avoid sending the PUT body twice, why can't a client just
> > > use the standard HTTP "Expect 100-Continue" header?
> >
> > It could, but it's a known problem that few servers implement that
> > correctly, meaning that the expected header check is indeed  
> skipped (for
> > instance, a server using the servlet API normally doesn't have any
> > chance doing this check, see
> > <http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4812000>).
> >
> > > And if a client is proactively checking for authentication  
> preceding
> > > a series of PUT calls, then having it just perform an initial  
> LOCK/UNLOCK
> > > to get the credential challenge doesn't seem like an  
> unreasonable overhead
> > > (2 initial requests).
> > >
> > > So is this just a technique for servers that want to provide this
> > > capability but don't want to support LOCK?
> >
> > Seems so, because LOCK seems to be yet another existing way to  
> get what
> > those clients want.
> >
> > Best regards, Julian
> >


--Apple-Mail-88-3398720
Content-Type: text/html;
	charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<HTML><BODY style=3D"word-wrap: break-word; -khtml-nbsp-mode: space; =
-khtml-line-break: after-white-space; ">There are two issues with Expect =
100-continue:<DIV><BR class=3D"khtml-block-placeholder"></DIV><DIV><DIV>* =
It is only permitted for methods with request bodies -- it would be far =
better for a client to have a single mechanism that worked for all =
methods.</DIV><DIV>* The server's behavior after sending a final status =
code (i.e., a 4xx) is not great -- either read the entire request body =
and send to /dev/null, or drop the TCP connection. It would be far =
better if the client never sent the request body in the first =
place.</DIV><DIV>* =46rom reading the HTTP specification, it's really =
unclear to me how Expect 100-continue works with proxy authentication. =
It almost seems as if this mechanism allows you to bypass proxy =
authentication.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>However, I still think the =
right action here is:</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>* Create a new appendix in =
2518bis</DIV><DIV>* In this appendix, document the problem</DIV><DIV>* =
Describe the known approaches for addressing the problem (If approach, =
100-continue approach) and their issues</DIV><DIV>* Create a separate =
draft focusing just on the Force-Authenticate approach, and discuss on =
HTTP-WG list.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>Julian seems to think this =
is an OK approach. Geoff seems to think this is OK. Jim Luther agrees =
with the separate draft part.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>Dang=A0if that doesn't seem =
like something approaching rough consensus to me.</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>- =
Jim</DIV><DIV><BR><DIV><DIV>On Oct 29, 2005, at 5:45 AM, Geoffrey M =
Clemm wrote:</DIV><BR class=3D"Apple-interchange-newline"><BLOCKQUOTE =
type=3D"cite"><BR><FONT size=3D"2"><TT>I agree that LOCK is the real =
answer here for WebDAV clients.</TT></FONT> <BR> <BR><FONT =
size=3D"2"><TT>But for the "force-authenticate" advocates (which Julian =
is not):</TT></FONT> <BR><FONT size=3D"2"><TT>If we are contrasting =
"Expect 100-Continue" vs. "force-authenticate", </TT></FONT> <BR><FONT =
size=3D"2"><TT>I think it would make more sense to advise servers to =
implement Expect</TT></FONT> <BR><FONT size=3D"2"><TT>correctly rather =
than to introduce a new force-authenticate header.</TT></FONT> <BR><FONT =
size=3D"2"><TT>In particular, why would one believe that a server that =
doesn't implement</TT></FONT> <BR><FONT size=3D"2"><TT>Expect properly =
would implement force-authenticate properly (or at all).</TT></FONT> =
<BR> <BR><FONT size=3D"2"><TT>Cheers,</TT></FONT> <BR><FONT =
size=3D"2"><TT>Geoff</TT></FONT> <BR> <BR><FONT size=3D"2"><TT>Julian =
wrote on 10/29/2005 04:20:45 AM:<BR> &gt; <BR> &gt; Geoffrey M Clemm =
wrote:<BR> &gt; &gt; <BR> &gt; &gt; To avoid sending the PUT body twice, =
why can't a client just<BR> &gt; &gt; use the standard HTTP "Expect =
100-Continue" header?<BR> &gt; <BR> &gt; It could, but it's a known =
problem that few servers implement that <BR> &gt; correctly, meaning =
that the expected header check is indeed skipped (for <BR> &gt; =
instance, a server using the servlet API normally doesn't have any <BR> =
&gt; chance doing this check, see <BR> &gt; &lt;<A =
href=3D"http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=3D4812000">http=
://bugs.sun.com/bugdatabase/view_bug.do?bug_id=3D4812000</A>&gt;).<BR> =
&gt; <BR> &gt; &gt; And if a client is proactively checking for =
authentication preceding<BR> &gt; &gt; a series of PUT calls, then =
having it just perform an initial LOCK/UNLOCK<BR> &gt; &gt; to get the =
credential challenge doesn't seem like an unreasonable overhead<BR> &gt; =
&gt; (2 initial requests).<BR> &gt; &gt; <BR> &gt; &gt; So is this just =
a technique for servers that want to provide this<BR> &gt; &gt; =
capability but don't want to support LOCK? =A0<BR> &gt; <BR> &gt; Seems =
so, because LOCK seems to be yet another existing way to get what <BR> =
&gt; those clients want.<BR> &gt; <BR> &gt; Best regards, Julian<BR> =
&gt; <BR> </TT></FONT></BLOCKQUOTE></DIV><BR></DIV></DIV></BODY></HTML>=

--Apple-Mail-88-3398720--




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Jim Whitehead wrote:
> There are two issues with Expect 100-continue:
> 
> * It is only permitted for methods with request bodies -- it would be 
> far better for a client to have a single mechanism that worked for all 
> methods.

Well, it only has an *effect* for messages with request bodies.

> * The server's behavior after sending a final status code (i.e., a 4xx) 
> is not great -- either read the entire request body and send to 
> /dev/null, or drop the TCP connection. It would be far better if the 
> client never sent the request body in the first place.

My understanding was that the client will never send the body it doesn't 
get the 100 Continue.

> * From reading the HTTP specification, it's really unclear to me how 
> Expect 100-continue works with proxy authentication. It almost seems as 
> if this mechanism allows you to bypass proxy authentication.
> 
> However, I still think the right action here is:
> 
> * Create a new appendix in 2518bis
> * In this appendix, document the problem
> * Describe the known approaches for addressing the problem (If approach, 
> 100-continue approach) and their issues
> * Create a separate draft focusing just on the Force-Authenticate 
> approach, and discuss on HTTP-WG list.
> 
> Julian seems to think this is an OK approach. Geoff seems to think this 
> is OK. Jim Luther agrees with the separate draft part.
> 
> Dang if that doesn't seem like something approaching rough consensus to me.

Sounds good.

Best regards, Julian




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Cullen Jennings wrote:
> Julian, in the above paragraph, if we replaced '"DAV:" namespace' with
> something like '"DAV:" namespace hierarchy' would that be correct? I don't
> know how to say this by do you have some text that you think would correctly
> say the essence of what the above paragraph is trying to get at?

Not really. XML namespaces do not have hierarchy. I'd really see the 
full paragraph, compare with RFC2518, and the make suggestions.

Best regards, Julian




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Thread-Topic: [Bug 12] Destination header "consistent"
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> This message is in MIME format. Since your mail reader does not understand
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Thanks - Well if that's the case, seem like an argument that everything that
needs saying has already been said.


On 10/31/05 4:16 AM, "Geoffrey M Clemm" <geoffrey.clemm@us.ibm.com> wrote:

> 
> You would do the same as what you would always do with a Location
> header in a response, i.e., use the URL specified in the Location header
> the next time you wanted to apply a method to the resource.
> 
> Cheers, 
> Geoff 
> 
> Cullen Jennings <fluffy@cisco.com> wrote on 10/30/2005 02:53:15 PM:
> 
>> > On 10/28/05 8:24 PM, "Geoffrey M Clemm" <geoffrey.clemm@us.ibm.com> wrote:
>> > 
>>> > > 
>>> > > +1 for either Jim's suggested text or saying nothing,
>>> > > and +1 that we then close this issue.
>>> > > 
>>> > > Cheers, 
>>> > > Geoff 
>> > 
>> > So I am a client implementer, should I do anything with the Location header
>> > in a 207 or should I just always ignore it?
>> > 
> 



--B_3213600797_4027429
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	charset="US-ASCII"
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<HTML>
<HEAD>
<TITLE>Re: [Bug 12] Destination header &quot;consistent&quot;</TITLE>
</HEAD>
<BODY>
<FONT FACE=3D"Verdana, Helvetica, Arial"><SPAN STYLE=3D'font-size:12.0px'><BR>
Thanks - Well if that's the case, seem like an argument that everything tha=
t needs saying has already been said.<BR>
<BR>
<BR>
On 10/31/05 4:16 AM, &quot;Geoffrey M Clemm&quot; &lt;geoffrey.clemm@us.ibm=
.com&gt; wrote:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE=3D"Verdana, Helvetica, Arial"><SPAN STYL=
E=3D'font-size:12.0px'><BR>
</SPAN></FONT><FONT SIZE=3D"2"><FONT FACE=3D"Monaco, Courier New"><SPAN STYLE=3D'=
font-size:10.0px'>You would do the same as what you would always do with a L=
ocation</SPAN></FONT></FONT><FONT FACE=3D"Verdana, Helvetica, Arial"><SPAN STY=
LE=3D'font-size:12.0px'> <BR>
</SPAN></FONT><FONT SIZE=3D"2"><FONT FACE=3D"Monaco, Courier New"><SPAN STYLE=3D'=
font-size:10.0px'>header in a response, i.e., use the URL specified in the L=
ocation header</SPAN></FONT></FONT><FONT FACE=3D"Verdana, Helvetica, Arial"><S=
PAN STYLE=3D'font-size:12.0px'> <BR>
</SPAN></FONT><FONT SIZE=3D"2"><FONT FACE=3D"Monaco, Courier New"><SPAN STYLE=3D'=
font-size:10.0px'>the next time you wanted to apply a method to the resource=
.</SPAN></FONT></FONT><FONT FACE=3D"Verdana, Helvetica, Arial"><SPAN STYLE=3D'fo=
nt-size:12.0px'> <BR>
<BR>
</SPAN></FONT><FONT SIZE=3D"2"><FONT FACE=3D"Monaco, Courier New"><SPAN STYLE=3D'=
font-size:10.0px'>Cheers,</SPAN></FONT></FONT><FONT FACE=3D"Verdana, Helvetica=
, Arial"><SPAN STYLE=3D'font-size:12.0px'> <BR>
</SPAN></FONT><FONT SIZE=3D"2"><FONT FACE=3D"Monaco, Courier New"><SPAN STYLE=3D'=
font-size:10.0px'>Geoff</SPAN></FONT></FONT><FONT FACE=3D"Verdana, Helvetica, =
Arial"><SPAN STYLE=3D'font-size:12.0px'> <BR>
<BR>
</SPAN></FONT><FONT SIZE=3D"2"><FONT FACE=3D"Monaco, Courier New"><SPAN STYLE=3D'=
font-size:10.0px'>Cullen Jennings &lt;fluffy@cisco.com&gt; wrote on 10/30/20=
05 02:53:15 PM:<BR>
<BR>
&gt; On 10/28/05 8:24 PM, &quot;Geoffrey M Clemm&quot; &lt;geoffrey.clemm@u=
s.ibm.com&gt; wrote:<BR>
&gt; <BR>
&gt; &gt; <BR>
&gt; &gt; +1 for either Jim's suggested text or saying nothing,<BR>
&gt; &gt; and +1 that we then close this issue.<BR>
&gt; &gt; <BR>
&gt; &gt; Cheers, <BR>
&gt; &gt; Geoff <BR>
&gt; <BR>
&gt; So I am a client implementer, should I do anything with the Location h=
eader<BR>
&gt; in a 207 or should I just always ignore it?<BR>
&gt; <BR>
</SPAN></FONT></FONT><FONT FACE=3D"Verdana, Helvetica, Arial"><SPAN STYLE=3D'fo=
nt-size:12.0px'><BR>
</SPAN></FONT></BLOCKQUOTE><FONT FACE=3D"Verdana, Helvetica, Arial"><SPAN STY=
LE=3D'font-size:12.0px'><BR>
</SPAN></FONT>
</BODY>
</HTML>


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Ok, I will take this as we have consensus that the next version of the draft
will contain the text as Lisa proposed and at that point we will look at it
and decide if we need to make changes.


On 10/31/05 10:24 AM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

> Cullen Jennings wrote:
>> Julian, in the above paragraph, if we replaced '"DAV:" namespace' with
>> something like '"DAV:" namespace hierarchy' would that be correct? I don't
>> know how to say this by do you have some text that you think would correctly
>> say the essence of what the above paragraph is trying to get at?
> 
> Not really. XML namespaces do not have hierarchy. I'd really see the
> full paragraph, compare with RFC2518, and the make suggestions.
> 
> Best regards, Julian




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> This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible.

--B_3213601000_4079134
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Unless more than one person objects in the next week, I'm going to invoke
one of my rare Chair privileges and claim that looks like consensus to me
too.

On 10/31/05 10:05 AM, "Jim Whitehead" <ejw@soe.ucsc.edu> wrote:

> However, I still think the right action here is:
>=20
> * Create a new appendix in 2518bis
> * In this appendix, document the problem
> * Describe the known approaches for addressing the problem (If approach,
> 100-continue approach) and their issues
> * Create a separate draft focusing just on the Force-Authenticate approac=
h,
> and discuss on HTTP-WG list.
>=20
> Julian seems to think this is an OK approach. Geoff seems to think this i=
s OK.
> Jim Luther agrees with the separate draft part.
>=20
> Dang=A0if that doesn't seem like something approaching rough consensus to m=
e.
>=20
> - Jim



--B_3213601000_4079134
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	charset="ISO-8859-1"
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<HTML>
<HEAD>
<TITLE>Re: [Bug 18] no record of consensus for force-authenticate</TITLE>
</HEAD>
<BODY>
<FONT FACE=3D"Verdana, Helvetica, Arial"><SPAN STYLE=3D'font-size:12.0px'><BR>
Unless more than one person objects in the next week, I'm going to invoke o=
ne of my rare Chair privileges and claim that looks like consensus to me too=
.<BR>
<BR>
On 10/31/05 10:05 AM, &quot;Jim Whitehead&quot; &lt;ejw@soe.ucsc.edu&gt; wr=
ote:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE=3D"Verdana, Helvetica, Arial"><SPAN STYL=
E=3D'font-size:12.0px'>However, I still think the right action here is:<BR>
<BR>
* Create a new appendix in 2518bis<BR>
* In this appendix, document the problem<BR>
* Describe the known approaches for addressing the problem (If approach, 10=
0-continue approach) and their issues<BR>
* Create a separate draft focusing just on the Force-Authenticate approach,=
 and discuss on HTTP-WG list.<BR>
<BR>
Julian seems to think this is an OK approach. Geoff seems to think this is =
OK. Jim Luther agrees with the separate draft part.<BR>
<BR>
Dang=A0if that doesn't seem like something approaching rough consensus to me.=
<BR>
<BR>
- Jim<BR>
</SPAN></FONT></BLOCKQUOTE><FONT FACE=3D"Verdana, Helvetica, Arial"><SPAN STY=
LE=3D'font-size:12.0px'><BR>
</SPAN></FONT>
</BODY>
</HTML>


--B_3213601000_4079134--




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This is a multipart message in MIME format.
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I agree that one needs to deal with the problem of failed clients,
but the correct way for the client to do so is with an
UNLOCK/LOCK sequence, and not by using a lock token that it obtains
from a PROPFIND.  This handles the case where it turns out that the
original client hadn't failed, but was just suspended.  With an 
UNLOCK/LOCK
sequence, the original client will get a failure on PUT because
its lock token is no longer valid.  With a re-use of the lock token
obtained with a PROPFIND, the original client's PUT will succeed
and overwrite changes made by the client that stole the lock token.

Cheers,
Geoff

Lisa Dusseault <lisa@osafoundation.org> wrote on 10/30/2005 10:51:58 AM:

> I mostly agree with this, except with the problem of failed clients. 
> If I use a WebDAV client that crashes and loses its locks, or has a bug 
> and fails to unlock -- or if I'm testing client or server software -- I 
> need a way to get the lock token to remove it as a last resort.
> 
> So yes, while clients SHOULD get the lock token on LOCK response and 
> remember it, there needs to be a way to recover without administrator 
> intervention.
> 
> Lisa
> 
> On Oct 29, 2005, at 8:55 PM, Geoffrey M Clemm wrote:
> 
> >
> > To be clear, I am completely in favor of a server exposing all of
> > the locks on a resource to an authorized user ... I am only against
> > revealing the lock-token in the information on the lock.
> >
> > As for clients that use lock-discovery instead of keeping track of
> > lock tokens, their implementor clearly didn't understand the purpose
> > of a lock token (preventing a user from overwriting his own changes 
> > from
> > another of his clients), and the specification should make this 
mistake
> > clear, and not encourage it.
> >
> > So I agree with Julian's final suggestion that this issue merits a
> > paragraph guiding clients on how to use lock tokens properly, and
> > guiding servers on how to deal with poorly implemented clients.
> >
> > Cheers,
> > Geoff
> >
> >
> > Julian wrote on 10/29/2005 09:12:06 AM:
> >
> >  >
> >  > Geoffrey M Clemm wrote:
> >  > >
> >  > > The likelihood of damage from lock stealing can be decreased by
> >  > > only allowing a given user/principal to steal his own locks, but
> >  > > (as indicated in my original message below :-) it does not 
prevent
> >  > > two clients of a given user/principal from overwriting each 
others
> >  > > changes.  Since there is a completely safe way of handling this
> >  >
> >  > Partly correct. Some clients put stuff into DAV:owner in order to 
> > ensure
> >  > that they can recognize the locks they created, but of course 
that's
> >  > lame compared to just remembering which locks one created in the 
> > first
> >  > place.
> >  >
> >  > > scenario (i.e., streaming an UNLOCK/LOCK sequence to the server),
> >  > > I maintain my position that a client should never "steal"
> >  > > a lock by discovering the lock-token via PROPFIND, even if that
> >  > > lock was held by another client of that same user, and therefore
> >  > > lock tokens should never be exposed in a PROPFIND.
> >  >
> >  > Well, from a purely theoretical point of view, I agree. In 
practice,
> >  > clients do lock discovery instead of keeping track of their locks 
on
> >  > their own, so these clients wouldn't work in this case.
> >  >
> >  > BTW: if a server does not want to expose lock tokens, it can also 
> > show
> >  > the locks, but leave out the DAV:locktoken child element. Anyway, 
> > this
> >  > is certainly a topic where on coherent paragraph would make a lot 
> > of sense.
> >  >
> >  > Best regards, Julian
> >  >

--=_alternative 0045C26D852570AB_=
Content-Type: text/html; charset="US-ASCII"


<br><font size=2><tt>I agree that one needs to deal with the problem of
failed clients,</tt></font>
<br><font size=2><tt>but the correct way for the client to do so is with
an</tt></font>
<br><font size=2><tt>UNLOCK/LOCK sequence, and not by using a lock token
that it obtains</tt></font>
<br><font size=2><tt>from a PROPFIND. &nbsp;This handles the case where
it turns out that the</tt></font>
<br><font size=2><tt>original client hadn't failed, but was just suspended.
&nbsp;With an UNLOCK/LOCK</tt></font>
<br><font size=2><tt>sequence, the original client will get a failure on
PUT because</tt></font>
<br><font size=2><tt>its lock token is no longer valid. &nbsp;With a re-use
of the lock token</tt></font>
<br><font size=2><tt>obtained with a PROPFIND, the original client's PUT
will succeed</tt></font>
<br><font size=2><tt>and overwrite changes made by the client that stole
the lock token.</tt></font>
<br>
<br><font size=2><tt>Cheers,</tt></font>
<br><font size=2><tt>Geoff</tt></font>
<br>
<br><font size=2><tt>Lisa Dusseault &lt;lisa@osafoundation.org&gt; wrote
on 10/30/2005 10:51:58 AM:<br>
<br>
&gt; I mostly agree with this, except with the problem of failed clients.
&nbsp;<br>
&gt; If I use a WebDAV client that crashes and loses its locks, or has
a bug <br>
&gt; and fails to unlock -- or if I'm testing client or server software
-- I <br>
&gt; need a way to get the lock token to remove it as a last resort.<br>
&gt; <br>
&gt; So yes, while clients SHOULD get the lock token on LOCK response and
<br>
&gt; remember it, there needs to be a way to recover without administrator
<br>
&gt; intervention.<br>
&gt; <br>
&gt; Lisa<br>
&gt; <br>
&gt; On Oct 29, 2005, at 8:55 PM, Geoffrey M Clemm wrote:<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt; To be clear, I am completely in favor of a server exposing all
of<br>
&gt; &gt; the locks on a resource to an authorized user ... I am only against<br>
&gt; &gt; revealing the lock-token in the information on the lock.<br>
&gt; &gt;<br>
&gt; &gt; As for clients that use lock-discovery instead of keeping track
of<br>
&gt; &gt; lock tokens, their implementor clearly didn't understand the
purpose<br>
&gt; &gt; of a lock token (preventing a user from overwriting his own changes
<br>
&gt; &gt; from<br>
&gt; &gt; another of his clients), and the specification should make this
mistake<br>
&gt; &gt; clear, and not encourage it.<br>
&gt; &gt;<br>
&gt; &gt; So I agree with Julian's final suggestion that this issue merits
a<br>
&gt; &gt; paragraph guiding clients on how to use lock tokens properly,
and<br>
&gt; &gt; guiding servers on how to deal with poorly implemented clients.<br>
&gt; &gt;<br>
&gt; &gt; Cheers,<br>
&gt; &gt; Geoff<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; Julian wrote on 10/29/2005 09:12:06 AM:<br>
&gt; &gt;<br>
&gt; &gt; &nbsp;&gt;<br>
&gt; &gt; &nbsp;&gt; Geoffrey M Clemm wrote:<br>
&gt; &gt; &nbsp;&gt; &gt;<br>
&gt; &gt; &nbsp;&gt; &gt; The likelihood of damage from lock stealing can
be decreased by<br>
&gt; &gt; &nbsp;&gt; &gt; only allowing a given user/principal to steal
his own locks, but<br>
&gt; &gt; &nbsp;&gt; &gt; (as indicated in my original message below :-)
it does not prevent<br>
&gt; &gt; &nbsp;&gt; &gt; two clients of a given user/principal from overwriting
each others<br>
&gt; &gt; &nbsp;&gt; &gt; changes. &nbsp;Since there is a completely safe
way of handling this<br>
&gt; &gt; &nbsp;&gt;<br>
&gt; &gt; &nbsp;&gt; Partly correct. Some clients put stuff into DAV:owner
in order to <br>
&gt; &gt; ensure<br>
&gt; &gt; &nbsp;&gt; that they can recognize the locks they created, but
of course that's<br>
&gt; &gt; &nbsp;&gt; lame compared to just remembering which locks one
created in the <br>
&gt; &gt; first<br>
&gt; &gt; &nbsp;&gt; place.<br>
&gt; &gt; &nbsp;&gt;<br>
&gt; &gt; &nbsp;&gt; &gt; scenario (i.e., streaming an UNLOCK/LOCK sequence
to the server),<br>
&gt; &gt; &nbsp;&gt; &gt; I maintain my position that a client should never
&quot;steal&quot;<br>
&gt; &gt; &nbsp;&gt; &gt; a lock by discovering the lock-token via PROPFIND,
even if that<br>
&gt; &gt; &nbsp;&gt; &gt; lock was held by another client of that same
user, and therefore<br>
&gt; &gt; &nbsp;&gt; &gt; lock tokens should never be exposed in a PROPFIND.<br>
&gt; &gt; &nbsp;&gt;<br>
&gt; &gt; &nbsp;&gt; Well, from a purely theoretical point of view, I agree.
In practice,<br>
&gt; &gt; &nbsp;&gt; clients do lock discovery instead of keeping track
of their locks on<br>
&gt; &gt; &nbsp;&gt; their own, so these clients wouldn't work in this
case.<br>
&gt; &gt; &nbsp;&gt;<br>
&gt; &gt; &nbsp;&gt; BTW: if a server does not want to expose lock tokens,
it can also <br>
&gt; &gt; show<br>
&gt; &gt; &nbsp;&gt; the locks, but leave out the DAV:locktoken child element.
Anyway, <br>
&gt; &gt; this<br>
&gt; &gt; &nbsp;&gt; is certainly a topic where on coherent paragraph would
make a lot <br>
&gt; &gt; of sense.<br>
&gt; &gt; &nbsp;&gt;<br>
&gt; &gt; &nbsp;&gt; Best regards, Julian<br>
&gt; &gt; &nbsp;&gt;<br>
</tt></font>
--=_alternative 0045C26D852570AB_=--




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------ Forwarded Message
From: via RT <iesg-secretary@ietf.org>
Reply-To: <iesg-secretary@ietf.org>
Date: Mon, 31 Oct 2005 14:55:23 -0500
To: <fluffy@cisco.com>
Subject: [Inquiry #83038] Publication requested for
draft-ietf-webdav-redirectref-protocol-13

Your request to publish I-D draft-ietf-webdav-redirectref-protocol as an
Experimental RFC has been received.  Please use the I-D Tracker
(https://datatracker.ietf.org/public/pidtracker.cgi) to check the status
of the document.

Please note that once a request to publish an I-D as an RFC has been
submitted, the I-D must not be revised without the explicit advance
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Cullen Jennings wrote:
> 
> Ok, I will take this as we have consensus that the next version of the draft
> will contain the text as Lisa proposed and at that point we will look at it
> and decide if we need to make changes.

Ahem. I'd actually like to see the proposed text in context, and then 
comment on it.

Lisa, could you please post the full paragraph for review?

Thanks,

Julian




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--Apple-Mail-2-14228025
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The original question that brought up this issue was how to interpret 
the URLs inside the body of the Multi-Status if there was a Location 
header.  It was unclear to some client implementors
  - should the URLs in the body be relative to the Location header
  - should they be relative to the Request-URI
  - should they be absolute URLs, always, and if so, should they be 
consistent with the Location header or the Request-URI

There was an actual interoperability problem that uncovered this.  Some 
server returned a Location header and a bunch of URLs in the body, that 
used the new location.  The client errored because the client never 
expected to query a Collection for its children and find a bunch of 
URLs that didn't begin with the URL used in the request URI.

Lisa

On Oct 31, 2005, at 10:53 AM, Cullen Jennings wrote:

>
>  Thanks - Well if that's the case, seem like an argument that 
> everything that needs saying has already been said.
>
>
>  On 10/31/05 4:16 AM, "Geoffrey M Clemm" <geoffrey.clemm@us.ibm.com> 
> wrote:
>
>>
>> You would do the same as what you would always do with a Location
>> header in a response, i.e., use the URL specified in the Location 
>> header
>> the next time you wanted to apply a method to the resource.
>>
>> Cheers,
>> Geoff
>>
>> Cullen Jennings <fluffy@cisco.com> wrote on 10/30/2005 02:53:15 PM:
>>
>>  > On 10/28/05 8:24 PM, "Geoffrey M Clemm" 
>> <geoffrey.clemm@us.ibm.com> wrote:
>>  >
>>  > >
>>  > > +1 for either Jim's suggested text or saying nothing,
>>  > > and +1 that we then close this issue.
>>  > >
>>  > > Cheers,
>>  > > Geoff
>>  >
>>  > So I am a client implementer, should I do anything with the 
>> Location header
>>  > in a 207 or should I just always ignore it?
>>  >
>>
>
>  
--Apple-Mail-2-14228025
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The original question that brought up this issue was how to interpret
the URLs inside the body of the Multi-Status if there was a Location
header.  It was unclear to some client implementors

 - should the URLs in the body be relative to the Location header

 - should they be relative to the Request-URI

 - should they be absolute URLs, always, and if so, should they be
consistent with the Location header or the Request-URI


There was an actual interoperability problem that uncovered this. 
Some server returned a Location header and a bunch of URLs in the
body, that used the new location.  The client errored because the
client never expected to query a Collection for its children and find
a bunch of URLs that didn't begin with the URL used in the request URI.


Lisa


On Oct 31, 2005, at 10:53 AM, Cullen Jennings wrote:


<excerpt>

<fontfamily><param>Verdana</param> Thanks - Well if that's the case,
seem like an argument that everything that needs saying has already
been said.</fontfamily>



<fontfamily><param>Verdana</param> On 10/31/05 4:16 AM, "Geoffrey M
Clemm" <<geoffrey.clemm@us.ibm.com> wrote:</fontfamily>


<excerpt>

<fixed>You would do the same as what you would always do with a
Location</fixed><fontfamily><param>Verdana</param> </fontfamily>

<fixed>header in a response, i.e., use the URL specified in the
Location header</fixed><fontfamily><param>Verdana</param> </fontfamily>

<fixed>the next time you wanted to apply a method to the
resource.</fixed><fontfamily><param>Verdana</param> </fontfamily>


<fixed>Cheers,</fixed><fontfamily><param>Verdana</param> </fontfamily>

<fixed>Geoff</fixed><fontfamily><param>Verdana</param> </fontfamily>


<fixed>Cullen Jennings <<fluffy@cisco.com> wrote on 10/30/2005
02:53:15 PM:</fixed>


<fixed> > On 10/28/05 8:24 PM, "Geoffrey M Clemm"
<<geoffrey.clemm@us.ibm.com> wrote:</fixed>

<fixed> ></fixed>

<fixed> > ></fixed>

<fixed> > > +1 for either Jim's suggested text or saying nothing,</fixed>

<fixed> > > and +1 that we then close this issue.</fixed>

<fixed> > ></fixed>

<fixed> > > Cheers,</fixed>

<fixed> > > Geoff</fixed>

<fixed> ></fixed>

<fixed> > So I am a client implementer, should I do anything with the
Location header</fixed>

<fixed> > in a 207 or should I just always ignore it?</fixed>

<fixed> ></fixed>


</excerpt>

 </excerpt>
--Apple-Mail-2-14228025--





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--Apple-Mail-3-14302669
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To clarify, would the Authorization header hacks I mentioned last week=20=

count as one of the known approaches?

Lisa

On Oct 31, 2005, at 10:56 AM, Cullen Jennings wrote:

>
>  Unless more than one person objects in the next week, I'm going to=20
> invoke one of my rare Chair privileges and claim that looks like=20
> consensus to me too.
>
>  On 10/31/05 10:05 AM, "Jim Whitehead" <ejw@soe.ucsc.edu> wrote:
>
>> However, I still think the right action here is:
>>
>>  * Create a new appendix in 2518bis
>>  * In this appendix, document the problem
>>  * Describe the known approaches for addressing the problem (If=20
>> approach, 100-continue approach) and their issues
>>  * Create a separate draft focusing just on the Force-Authenticate=20
>> approach, and discuss on HTTP-WG list.
>>
>>  Julian seems to think this is an OK approach. Geoff seems to think=20=

>> this is OK. Jim Luther agrees with the separate draft part.
>>
>>  Dang=A0if that doesn't seem like something approaching rough =
consensus=20
>> to me.
>>
>>  - Jim
>
> =20=

--Apple-Mail-3-14302669
Content-Type: text/enriched;
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To clarify, would the Authorization header hacks I mentioned last week
count as one of the known approaches? =20


Lisa


On Oct 31, 2005, at 10:56 AM, Cullen Jennings wrote:


<excerpt>

<fontfamily><param>Verdana</param> Unless more than one person objects
in the next week, I'm going to invoke one of my rare Chair privileges
and claim that looks like consensus to me too.</fontfamily>


<fontfamily><param>Verdana</param> On 10/31/05 10:05 AM, "Jim
Whitehead" <<ejw@soe.ucsc.edu> wrote:</fontfamily>


<excerpt><fontfamily><param>Verdana</param>However, I still think the
right action here is:</fontfamily>


<fontfamily><param>Verdana</param> * Create a new appendix in =
2518bis</fontfamily>

<fontfamily><param>Verdana</param> * In this appendix, document the
problem</fontfamily>

<fontfamily><param>Verdana</param> * Describe the known approaches for
addressing the problem (If approach, 100-continue approach) and their
issues</fontfamily>

<fontfamily><param>Verdana</param> * Create a separate draft focusing
just on the Force-Authenticate approach, and discuss on HTTP-WG =
list.</fontfamily>


<fontfamily><param>Verdana</param> Julian seems to think this is an OK
approach. Geoff seems to think this is OK. Jim Luther agrees with the
separate draft part.</fontfamily>


<fontfamily><param>Verdana</param> Dang=A0if that doesn't seem like
something approaching rough consensus to me.</fontfamily>


<fontfamily><param>Verdana</param> - Jim</fontfamily>

</excerpt>

 </excerpt>=

--Apple-Mail-3-14302669--





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That was the full paragraph.  Here's the entire section of proposed 
text:

IANA Considerations

    WebDAV uses XML-based identifiers with XML namespaces.
    The use of XML namespaces means that unique WebDAV property names
    and XML elements can be quickly defined by any WebDAV user or
    application, without requiring IANA action.
     The property names and XML elements in this specification
     are all in the "DAV:" namespace.  Creation of identifiers
     in the "DAV:" namespace is controlled by the IETF.

   The URI registrations for opaquelocktoken and DAV URI schemes made in
     RFC 2518 should still be considered active.

Lisa

On Oct 31, 2005, at 12:32 PM, Julian Reschke wrote:

> Cullen Jennings wrote:
>> Ok, I will take this as we have consensus that the next version of 
>> the draft
>> will contain the text as Lisa proposed and at that point we will look 
>> at it
>> and decide if we need to make changes.
>
> Ahem. I'd actually like to see the proposed text in context, and then 
> comment on it.
>
> Lisa, could you please post the full paragraph for review?
>
> Thanks,
>
> Julian





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Message-ID: <CFEE79A465B35C4385389BA5866BEDF00C7DCD@mailsrvnt02.enet.sharplabs.com>
From: "McDonald, Ira" <imcdonald@sharplabs.com>
To: "'pwg-announce@pwg.org'" <pwg-announce@pwg.org>
Subject: PWG-ANNOUNCE> FW: P2600/PWG Meeting Schedule for 2006
Date: Mon, 31 Oct 2005 13:17:53 -0800
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FYI,
- Ira
=20

Ira McDonald (Musician / Software Architect)
Blue Roof Music / High North Inc
PO Box 221  Grand Marais, MI  49839
phone: +1-906-494-2434
email: imcdonald@sharplabs.com=20

-----Original Message-----
From: Don Wright [mailto:don@LEXMARK.COM]
Sent: Monday, October 31, 2005 3:46 PM
To: STDS-2600@listserv.ieee.org
Subject: [2600] 2006 Meeting Schedule



After our meeting last week, the PWG, who has graciously hosted us for
several meetings this year and will again in 2006, swapped the =
locations of
the June and September meetings.  As such, here are the dates and =
locations
for us in 2006.  I will update the web page accordingly.=20

* January 16-17 with the PWG in Las Vegas=20
* March 2-3 open=20
* April 3-4 with PWG in Mount Laurel, NJ (near Philly) @ Okidata=20
* May 23-24 (Oc=E9 checking on Paris)=20
* June 19-20 with PWG (Portland - Sharp - tentative)=20
* July 26-27 (Rochester, NY - Xerox)=20
* September 6-7 (Boulder - IBM - tentative)=20
* October 23-24 with PWG in Lexington KY @ Lexmark=20
* December 11-12 (Canon, Orange County - tentative)=20

After some checking, Ricoh is unable to host us in Atlanta in March.  =
Anyone
else have something available in the southern US (Georgia, Texas, =
Florida,
etc.)?=20

************************************************************************=
***=20
 Don Wright                      don@lexmark.com=20
                                 f.wright@ieee.org / =
f.wright@computer.org=20
 Director of Standards=20
 Lexmark International           Past Chair, IEEE SA Standards Board=20
 740 New Circle Rd               Chair, Patent Committee IEEE SASB=20
 Lexington, Ky 40550             Member-at-large, IEEE CS SAB=20
 859-825-4808 (phone)            Member, IEEE-ISTO Board of Directors=20
 603-963-8352 (fax)              Member, W3C Advisory Committee=20
************************************************************************=
***=20


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charset=3DISO-8859-1">


<META content=3D"MSHTML 6.00.2800.1515" name=3DGENERATOR></HEAD>
<BODY>
<DIV><FONT face=3DArial color=3D#0000ff size=3D4><SPAN=20
class=3D882321521-31102005>FYI,</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D4><SPAN =
class=3D882321521-31102005>-=20
Ira</SPAN></FONT></DIV>
<DIV>&nbsp;</DIV>
<P><FONT size=3D2>Ira McDonald (Musician / Software Architect)<BR>Blue =
Roof Music=20
/ High North Inc<BR>PO Box 221&nbsp; Grand Marais, MI&nbsp; =
49839<BR>phone:=20
+1-906-494-2434<BR>email: imcdonald@sharplabs.com</FONT> </P>
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> Don Wright=20
[mailto:don@LEXMARK.COM]<BR><B>Sent:</B> Monday, October 31, 2005 3:46=20
PM<BR><B>To:</B> STDS-2600@listserv.ieee.org<BR><B>Subject:</B> [2600] =
2006=20
Meeting Schedule<BR><BR></FONT></DIV><BR><FONT size=3D3>After our =
meeting last=20
week, the PWG, who has graciously hosted us for several meetings this =
year and=20
will again in 2006, swapped the locations of the June and September =
meetings.=20
&nbsp;As such, here are the dates and locations for us in 2006. &nbsp;I =
will=20
update the web page accordingly.</FONT> <BR><BR><FONT size=3D3>* =
January 16-17=20
with the </FONT><FONT color=3Dred size=3D3>PWG</FONT><FONT size=3D3> in =
Las=20
Vegas</FONT> <BR><FONT size=3D3>* March 2-3 open</FONT> <BR><FONT =
size=3D3>* April=20
3-4 with </FONT><FONT color=3Dred size=3D3>PWG</FONT><FONT size=3D3> in =
Mount Laurel,=20
NJ (near Philly) @ Okidata</FONT> <BR><FONT size=3D3>* May 23-24 (Oc=E9 =
checking on=20
Paris)</FONT> <BR><FONT size=3D3>* June 19-20 with </FONT><FONT =
color=3Dred=20
size=3D3>PWG</FONT><FONT size=3D3> (Portland - Sharp - tentative) =
</FONT><BR><FONT=20
size=3D3>* July 26-27 (Rochester, NY - Xerox)</FONT> <BR><FONT =
size=3D3>* September=20
6-7 (Boulder - IBM - tentative)</FONT> <BR><FONT size=3D3>* October =
23-24 with=20
</FONT><FONT color=3Dred size=3D3>PWG</FONT><FONT size=3D3> in =
Lexington KY @=20
Lexmark</FONT> <BR><FONT size=3D3>* December 11-12 (Canon, Orange =
County -=20
tentative)</FONT><FONT size=3D2><TT> </TT></FONT><BR><BR><FONT =
size=3D3>After some=20
checking, Ricoh is unable to host us in Atlanta in March. &nbsp;Anyone =
else have=20
something available in the southern US (Georgia, Texas, Florida, =
etc.)?</FONT>=20
<BR><BR><FONT face=3D"Courier New"=20
size=3D1>***************************************************************=
************</FONT>=20
<BR><FONT face=3D"Courier New" size=3D1>&nbsp;Don Wright &nbsp; &nbsp; =
&nbsp; &nbsp;=20
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;don@lexmark.com</FONT> =
<BR><FONT=20
face=3D"Courier New" size=3D1>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp;=20
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;=20
&nbsp;f.wright@ieee.org / f.wright@computer.org</FONT> <BR><FONT=20
face=3D"Courier New" size=3D1>&nbsp;Director of Standards</FONT> =
<BR><FONT=20
face=3D"Courier New" size=3D1>&nbsp;Lexmark International &nbsp; &nbsp; =
&nbsp;=20
&nbsp; &nbsp; Past Chair, IEEE SA Standards Board</FONT> <BR><FONT=20
face=3D"Courier New" size=3D1>&nbsp;740 New Circle Rd &nbsp; &nbsp; =
&nbsp; &nbsp;=20
&nbsp; &nbsp; &nbsp; Chair, Patent Committee IEEE SASB</FONT> <BR><FONT =

face=3D"Courier New" size=3D1>&nbsp;Lexington, Ky 40550 &nbsp; &nbsp; =
&nbsp; &nbsp;=20
&nbsp; &nbsp; Member-at-large, IEEE CS SAB</FONT> <BR><FONT =
face=3D"Courier New"=20
size=3D1>&nbsp;859-825-4808 (phone) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;=20
&nbsp;Member, IEEE-ISTO Board of Directors</FONT> <BR><FONT =
face=3D"Courier New"=20
size=3D1>&nbsp;603-963-8352 (fax) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp;=20
&nbsp;Member, W3C Advisory Committee</FONT> <BR><FONT face=3D"Courier =
New"=20
size=3D1>***************************************************************=
************</FONT>=20
<BR></BODY></HTML>

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Lisa Dusseault wrote:
> The original question that brought up this issue was how to interpret 
> the URLs inside the body of the Multi-Status if there was a Location 

Is there any record on the mailing list of this issue? Has anybody ever 
*seen* a 207 with a Location header? That is, why was this question 
asked in the first place?

> header. It was unclear to some client implementors
> - should the URLs in the body be relative to the Location header
> - should they be relative to the Request-URI
> - should they be absolute URLs, always, and if so, should they be 

They should be either absolute, or need to be resolved relative to the 
Reuqest-URI. If this is not clear from RFC2518, let's fix that.

> consistent with the Location header or the Request-URI

What does "consistent" mean here? Note that this is the original reason 
why I raised this issue.

> There was an actual interoperability problem that uncovered this. Some 
> server returned a Location header and a bunch of URLs in the body, that 
> used the new location. The client errored because the client never 
> expected to query a Collection for its children and find a bunch of URLs 
> that didn't begin with the URL used in the request URI.

As far as I can tell, that's a server bug. Clients aren't expected to 
handle PROPFIND responses with URLs that identify resources are then the 
one identified by the Request-URI (and its descendants). If a server 
wants to redirect clients, it will have to use a 3xx status code (as 
defined in RFC2616).

Best regards, Julian






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From: Lisa Dusseault <lisa@osafoundation.org>
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On Oct 31, 2005, at 1:16 PM, Julian Reschke wrote:

> Lisa Dusseault wrote:
>> The original question that brought up this issue was how to interpret 
>> the URLs inside the body of the Multi-Status if there was a Location
>
> Is there any record on the mailing list of this issue? Has anybody 
> ever *seen* a 207 with a Location header? That is, why was this 
> question asked in the first place?
Yes.  At an Interop event.

...
>
>> consistent with the Location header or the Request-URI
>
> What does "consistent" mean here? Note that this is the original 
> reason why I raised this issue.

What I meant by "consistent" (and maybe somebody can find a better way 
to word this or we can just define it) was:  In a PROPFIND or PROPPATCH 
response, for the URLs in the body to be consistent with the 
Request-URI, all URLs would all begin with the exact URL used in the 
Request-URI.   I believe the same would be true for MOVE and COPY 
responses -- the URLs would be consistent with the Request URI, not 
with the Destination request header or the Location reply header.


>> There was an actual interoperability problem that uncovered this. 
>> Some server returned a Location header and a bunch of URLs in the 
>> body, that used the new location. The client errored because the 
>> client never expected to query a Collection for its children and find 
>> a bunch of URLs that didn't begin with the URL used in the request 
>> URI.
>
> As far as I can tell, that's a server bug. Clients aren't expected to 
> handle PROPFIND responses with URLs that identify resources are then 
> the one identified by the Request-URI (and its descendants). If a 
> server wants to redirect clients, it will have to use a 3xx status 
> code (as defined in RFC2616).
>
It may be a server bug under some models or readings of RFC2518.  The 
server implementor certainly would have a case for interpreting RFC2518 
as allowing their "solution".  This past week, Geoff seemed to be 
arguing for allowing Location with 207 and not only with 3xx.

Lisa





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Lisa Dusseault wrote:
> That was the full paragraph.  Here's the entire section of proposed text:

Sorry, I should have said "the full section".

> IANA Considerations
> 
>    WebDAV uses XML-based identifiers with XML namespaces.
>    The use of XML namespaces means that unique WebDAV property names
>    and XML elements can be quickly defined by any WebDAV user or
>    application, without requiring IANA action.
>     The property names and XML elements in this specification
>     are all in the "DAV:" namespace.  Creation of identifiers
>     in the "DAV:" namespace is controlled by the IETF.
> 
>   The URI registrations for opaquelocktoken and DAV URI schemes made in
>     RFC 2518 should still be considered active.

Let's see what we have in RFC2518:

--
18. IANA Considerations

This document defines two namespaces, the namespace of property names, 
and the namespace of WebDAV-specific XML elements used within property 
values. URIs are used for both names, for several reasons. Assignment of 
a URI does not require a request to a central naming authority, and 
hence allow WebDAV property names and XML elements to be quickly defined 
by any WebDAV user or application. URIs also provide a unique address 
space, ensuring that the distributed users of WebDAV will not have 
collisions among the property names and XML elements they create.

This specification defines a distinguished set of property names and XML 
elements that are understood by all WebDAV applications. The property 
names and XML elements in this specification are all derived from the 
base URI DAV: by adding a suffix to this URI, for example, 
DAV:creationdate for the "creationdate" property.

This specification also defines a URI scheme for the encoding of lock 
tokens, the opaquelocktoken URI scheme described in Section 6.4.

To ensure correct interoperation based on this specification, IANA must 
reserve the URI namespaces starting with "DAV:" and with 
"opaquelocktoken:" for use by this specification, its revisions, and 
related WebDAV specifications.
--

This certainly can be simplified, but we need to be careful here. Going 
back to the current proposal:

 >    WebDAV uses XML-based identifiers with XML namespaces.

Well, it uses identifiers consisting of namespace names and local names 
(as defined per XML-Infoset).

 >    The use of XML namespaces means that unique WebDAV property names
 >    and XML elements can be quickly defined by any WebDAV user or
 >    application, without requiring IANA action.

That's true, but I think the IANA section should be clear about what 
IANA needs to do with/for this spec, so I'd re-arrange the text to say 
what IANA needs to do first.

 >     The property names and XML elements in this specification
 >     are all in the "DAV:" namespace.  Creation of identifiers
 >     in the "DAV:" namespace is controlled by the IETF.
 >
 >   The URI registrations for opaquelocktoken and DAV URI schemes made in
 >     RFC 2518 should still be considered active.

Sorry? That would mean that these two namespaces are still defined as 
per RFC2518. Is this really intended????

Here's a proposal for rewriting the section, based on the original text 
and ideas from the current proposal:

--

XX. IANA Considerations

XX.1. URI schemes

This specification defines two URI schemes:

1) the "opaquelocktoken" URI scheme for the encoding of lock tokens, 
defined in Appendix XYZ, and

2) the "DAV" URI scheme, which historically was used in RFC2518 to 
disambiguate WebDAV property and XML element names and which continues 
to be used for that purpose in this specification and others extending 
WebDAV. Creation of identifiers in the "DAV:" namespace is controlled by 
the IETF.

To ensure correct interoperation based on this specification, IANA must 
reserve the URI namespaces starting with "DAV:" and with 
"opaquelocktoken:" for use by this specification, its revisions, and 
related WebDAV specifications.

XX.2. Other namespaces

This document also defines multiple namespaces, including the namespace 
of property names, the namespace of WebDAV-specific XML elements used 
within property values and the namespace of pre-/postcondition names. 
Namespaced XML element names (pairs of "namespace name" and "local name" 
as per [XML-Infoset]) are used for all of them, for several reasons. Due 
to the fact that XML namespace names syntactically use URIs, assignment 
of names does not require a request to a central naming authority, and 
hence allow identifiers to be quickly defined by any WebDAV user or 
application.  Therefore, no actions on behalf of IANA are required to 
manage these namespaces.


--

Feedback appreciated,

Julian




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Lisa Dusseault wrote:
> 
> On Oct 31, 2005, at 1:16 PM, Julian Reschke wrote:
> 
>> Lisa Dusseault wrote:
>>
>>> The original question that brought up this issue was how to interpret 
>>> the URLs inside the body of the Multi-Status if there was a Location
>>
>>
>> Is there any record on the mailing list of this issue? Has anybody 
>> ever *seen* a 207 with a Location header? That is, why was this 
>> question asked in the first place?
> 
> Yes.  At an Interop event.

Is there any record on the mailing list of this issue?

>>> consistent with the Location header or the Request-URI
>>
>>
>> What does "consistent" mean here? Note that this is the original 
>> reason why I raised this issue.
> 
> 
> What I meant by "consistent" (and maybe somebody can find a better way 
> to word this or we can just define it) was:  In a PROPFIND or PROPPATCH 
> response, for the URLs in the body to be consistent with the 
> Request-URI, all URLs would all begin with the exact URL used in the 
> Request-URI.   I believe the same would be true for MOVE and COPY 
> responses -- the URLs would be consistent with the Request URI, not with 
> the Destination request header or the Location reply header.

I still don't see what problem this solves. The URIs appearing in 
multistatus responses should be either absolute, or relative to the 
Request-URI. If, for instance, in a PROPFIND response, a response 
element comes with a URI that after resolving is not descendant of the 
Request-URI, then the server made a mistake. We can of course discuss 
how a client should handle this. Skipping it is one answer, failing the 
whole request is another. In practice it's unlikely to make a difference 
because if a server get's one response element wrong, it's likely to get 
*all of them* wrong.

>>> There was an actual interoperability problem that uncovered this. 
>>> Some server returned a Location header and a bunch of URLs in the 
>>> body, that used the new location. The client errored because the 
>>> client never expected to query a Collection for its children and find 
>>> a bunch of URLs that didn't begin with the URL used in the request URI.
>>
>>
>> As far as I can tell, that's a server bug. Clients aren't expected to 
>> handle PROPFIND responses with URLs that identify resources are then 
>> the one identified by the Request-URI (and its descendants). If a 
>> server wants to redirect clients, it will have to use a 3xx status 
>> code (as defined in RFC2616).
>>
> It may be a server bug under some models or readings of RFC2518.  The 
> server implementor certainly would have a case for interpreting RFC2518 
> as allowing their "solution".  This past week, Geoff seemed to be 
> arguing for allowing Location with 207 and not only with 3xx.

HTTP defines a range of response codes (3xx) for redirects, and defines 
how the Location header can be used to specify new URIs for subsequent 
requests. I think this feature is completely well-defined, and I'm not 
aware of any problems with that.

If a server implementor chooses to use non-3xx response code for a 
redirect, than that's simply outside what HTTP currently defines; and it 
escapes me why somebody would want to invent something new for a feature 
that already exists.

And finally, Geoff wasn't recommending to use 207 with Location, he just 
made a guess about what a client could conceivably do once it get's a 
response like that.

If this was an interop problem at one point of time, I'd like to see the 
details published, or -- if this isn't possible -- hear from client 
implementors who suffered from that problem. Maybe the servers have been 
fixed since then, and the whole issue has gone away.

Best regards, Julian









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Lisa Dusseault wrote:
> To clarify, would the Authorization header hacks I mentioned last week 
> count as one of the known approaches?

Are you talking about the stuff in 
<http://lists.w3.org/Archives/Public/w3c-dist-auth/2005OctDec/0416.html>?

If this works and is compliant with the base specs (2616/2617), why not? 
Otherwise, why bother?

Best regards, Julian




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Date: Mon, 31 Oct 2005 15:31:39 -0800
From: Cullen Jennings <fluffy@cisco.com>
To: Julian Reschke <julian.reschke@gmx.de>,
        Lisa Dusseault <lisa@osafoundation.org>
CC: Geoffrey M Clemm <geoffrey.clemm@us.ibm.com>,
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Thread-Topic: [Bug 12] Destination header "consistent"
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On 10/31/05 2:05 PM, "Julian Reschke" <julian.reschke@gmx.de> wrote:

>>> Is there any record on the mailing list of this issue? Has anybody
>>> ever *seen* a 207 with a Location header? That is, why was this
>>> question asked in the first place?
>> 
>> Yes.  At an Interop event.
> 
> Is there any record on the mailing list of this issue?

There is now :-) Sorry, the recursive self referential possibility was just
too good to pass up.

This email was definitely not sent with my Chair hat on.




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On Oct 31, 2005, at 2:05 PM, Julian Reschke wrote:

> Lisa Dusseault wrote:
>> On Oct 31, 2005, at 1:16 PM, Julian Reschke wrote:
>>> Lisa Dusseault wrote:
>>>
>>>> The original question that brought up this issue was how to 
>>>> interpret the URLs inside the body of the Multi-Status if there was 
>>>> a Location
>>>
>>>
>>> Is there any record on the mailing list of this issue? Has anybody 
>>> ever *seen* a 207 with a Location header? That is, why was this 
>>> question asked in the first place?
>> Yes.  At an Interop event.
>
> Is there any record on the mailing list of this issue?
Sept 15, 2002, mail from me entitled "Issues from Interop/Interim WG 
Meeting".


"- Clients get confused if host names change; Clients expect
full/relative URLs? Dealt with in text on multistatus response"

The Location header was what the server was using to indicate the host 
name redirection in this case, which I didn't mention in this brief 
summary unfortunately.

The full details of the Interop -- e.g which client this was, and which 
server -- were never published, a decision we made in order to get 
broader participation in the Interop.

Lisa
--Apple-Mail-4-25852713
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On Oct 31, 2005, at 2:05 PM, Julian Reschke wrote:


<excerpt>Lisa Dusseault wrote:

<excerpt>On Oct 31, 2005, at 1:16 PM, Julian Reschke wrote:

<excerpt>Lisa Dusseault wrote:


<excerpt>The original question that brought up this issue was how to
interpret the URLs inside the body of the Multi-Status if there was a
Location

</excerpt>


Is there any record on the mailing list of this issue? Has anybody
ever *seen* a 207 with a Location header? That is, why was this
question asked in the first place?

</excerpt>Yes.  At an Interop event.

</excerpt>

Is there any record on the mailing list of this issue?

</excerpt>Sept 15, 2002, mail from me entitled "<bold>Issues from
Interop/Interim WG Meeting".</bold>



"- Clients get confused if host names change; Clients expect

full/relative URLs? Dealt with in text on multistatus response"


The Location header was what the server was using to indicate the host
name redirection in this case, which I didn't mention in this brief
summary unfortunately.


The full details of the Interop -- e.g which client this was, and
which server -- were never published, a decision we made in order to
get broader participation in the Interop.


Lisa
--Apple-Mail-4-25852713--





