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Re: SHOULD-level requirements in p6-caching

From: Poul-Henning Kamp <phk@phk.freebsd.dk>
Date: Fri, 08 Apr 2011 10:11:51 +0000
To: Julian Reschke <julian.reschke@gmx.de>
cc: Mark Nottingham <mnot@mnot.net>, HTTP Working Group <ietf-http-wg@w3.org>
Message-ID: <42805.1302257511@critter.freebsd.dk>
In message <4D9EDB5D.2020805@gmx.de>, Julian Reschke writes:
>On 08.04.2011 11:04, Poul-Henning Kamp wrote:

>> That web-apps expect caches to either use the cookies as part of their
>> hash-key or not cache at all when cookies are present, or they break
>> seven ways before breakfast.
>
>Ack.
>
>This is similar to the special case we have in P1 with respect to 
>handling multiple Set-Cookie header fields 
>(<http://greenbytes.de/tech/webdav/draft-ietf-httpbis-p1-messaging-13.html#rfc.section.3.2.p.7>).
>
>So we probably should mention it, but adding a requirement might break 
>existing conforming implementations, so I'd prefer not to.

Each cookies should have an attribute that tells if they should
affect the Vary/hash-key or not.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
Received on Friday, 8 April 2011 10:12:15 GMT

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