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

From: Roy T. Fielding <fielding@gbiv.com>
Date: Fri, 20 Oct 2006 11:33:42 -0700
Message-Id: <2A125956-97A2-484F-91B3-9BD2CDEE8A8F@gbiv.com>
Cc: Henrik Nordstrom <henrik@henriknordstrom.net>, Jamie Lokier <jamie@shareable.org>, HTTP Working Group <ietf-http-wg@w3.org>
To: Julian Reschke <julian.reschke@gmx.de>

On Oct 20, 2006, at 11:27 AM, Julian Reschke wrote:
> Well, that's clearer, but not my interpretation of what it should  
> say. Don't we want a missing header to be treated the same way as  
> an empty header?

Nope.  They usually don't mean the same thing (see Accept).

> That is, if the cache has a cached response from a previous request  
> with "Accept-Language: de", and the server replied with "Vary:  
> Accept-Language", can a subsequent request without "Accept- 
> Language" header be served with the cached reply? I wouldn't have  
> thought so....

No, we have no idea what the language pref algorithm is on the server.

....Roy
Received on Friday, 20 October 2006 18:33:42 GMT

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