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Re: ISSUE VARY: Proposed wording

From: David W. Morris <dwm@xpasc.com>
Date: Wed, 9 Jul 1997 22:45:01 -0700 (PDT)
To: Jeffrey Mogul <mogul@pa.dec.com>
Cc: Henrik Frystyk Nielsen <frystyk@w3.org>, http-wg@cuckoo.hpl.hp.com
Message-Id: <Pine.GSO.3.96.970709224335.26041C-100000@shell1.aimnet.com>


On Wed, 9 Jul 1997, Jeffrey Mogul wrote:

> I think the first part is still somewhat misleading.  How about:
> 
>     If the representation was selected using criteria not limited to
>     the request-headers, then the server MUST include a "Vary: *"
>     header field in the response.
>     In this case, a cache MUST NOT use the response in
>     a reply to a subsequent request unless the cache relays the new
>     request to the origin server in a conditional request and the
>     server responds with 304 (Not Modified), including an entity tag or
>     Content-Location that indicates which entity should be used.
> 
> As long as we are going to say MUST, we should be explicit about
> what the requirement is.

I vote for your variant. I didn't really care for the prior version
with a header talking to a cache.

Dave Morris
Received on Wednesday, 9 July 1997 22:49:47 EDT

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