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Re: Redirection

From: David Woolley <david@djwhome.demon.co.uk>
Date: Tue, 11 Nov 2003 21:57:12 +0000 (GMT)
Message-Id: <200311112157.hABLvCS18356@djwhome.demon.co.uk>
To: w3c-wai-ig@w3.org

> As a follow-up to the redirection thread, I think that this method could 
> prove to be a handy way to provide metadata (eg RDF) for pages.

Possibly, but the way that HTTP is designed to work is that exactly the
same URL will provide both, negotiated based on the Accept header.  This
is problematic for current caches, which will tend turn off if they see
Vary: Accept, rather than caching different versions for different
Accept strings.  (Vary: Accept is a bit of a blunt instrument because a lot
of variations will be equivalent.  Generally the best way of being cache
friendly is to do a status 302, temporary redirect so that the cached
resources are not negotiated.)
Received on Tuesday, 11 November 2003 16:57:14 UTC

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