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Re: Appropriate partial success codes (was Re: Some questions about WebDAV)

From: Geoffrey M Clemm <geoffrey.clemm@us.ibm.com>
Date: Wed, 19 Oct 2005 23:13:43 -0400
To: Julian Reschke <julian.reschke@gmx.de>
Cc: Cullen Jennings <fluffy@cisco.com>, Lisa Dusseault <lisa@osafoundation.org>, WebDav <w3c-dist-auth@w3.org>, w3c-dist-auth-request@w3.org
Message-ID: <OF97080900.27A8B137-ON852570A0.00112822-852570A0.0011BBEF@us.ibm.com>
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
> 
Received on Thursday, 20 October 2005 03:13:55 GMT

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