[9036] in www-talk@info.cern.ch

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Re: Can you cache the unknown? (was Re: Session-ID proposal)

daemon@ATHENA.MIT.EDU (Roy Fielding)
Fri Aug 25 14:59:52 1995

To: Bob Wyman <bobwyman@medio.com>
Cc: "www-talk@w3.org" <www-talk@w3.org>
In-Reply-To: Your message of "Thu, 24 Aug 1995 15:17:03 -0800."
             <199508242225.PAA27244@dns.medio.com> 
Date: Fri, 25 Aug 1995 14:58:09 -0400
From: Roy Fielding <fielding@beach.w3.org>
Resent-From: www-talk@w3.org

>I don't understand why a cache "must" do this... Can you explain why this is
>necessary?

Any unknown header is treated as an Entity-Header, and a proxy must cache
entity headers if it intends to forward them to future clients.

>I would prefer if caches would not cache objects that contained unknown
>headers under any conditions. If this can't be the case, can we at least
>have a requirement  that caches must not cache responses that carry protocol
>versions whose defined elements aren't understood by the cache.

That is unneccessary if the recipient compares the received headers
to the received HTTP-Version.


 ....Roy T. Fielding  Department of ICS, University of California, Irvine USA
                      Visiting Scholar, MIT/LCS + World-Wide Web Consortium
                      (fielding@w3.org)                (fielding@ics.uci.edu)


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