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RE: ETags vs Variants, was: Revising RFC2616 - what's happening

From: Larry Masinter <LMM@acm.org>
Date: Fri, 20 Oct 2006 08:31:54 -0700
To: "'HTTP Working Group'" <ietf-http-wg@w3.org>
Message-ID: <000201c6f45c$df53d6a0$651796c0@adobenet.global.adobe.com>

> > > What isn't very clear to me was what change in Vary means 
> on a URI.

> When one cached variant has one Vary header, and then another variant is
> received with a different Vary header. Lets say the first has
> 
> Vary: Accept-Language
> 
> and the second
> 
> Vary: Accept-Encoding

The only reasonable interpretation I can think of is that
second response means that the resource has changed and
that it no longer varies by Accept-Language, and so the first
cached value should be flushed.
Received on Friday, 20 October 2006 15:32:13 GMT

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