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From "Joshua Slive" <>
Subject RE: Expires: header prevents caching
Date Tue, 22 Jan 2002 20:05:56 GMT

> From: William A. Rowe, Jr. []

> > I'm no protcol expert, but that doesn't make sense to me.
> mod_negotiation
> > should be adding "Accept-Language" to the Vary: header (yep, it's doing
> > that), but it shouldn't be setting Expires, should it?  Proxies
> should be
> > free to cache the page, conditional on the Accept-Language.
> Which proxies?
> HTTP/1.1 proxies, yes, should be able to serve based on Vary: recognition.
> HTTP/1.0 proxies, no, cannot do that.  We should add [if it's not already
> present] the appropriate conditions in that reset.

Yes, you're right.  But at the moment, we are getting Expires for ALL
requests.  That's not good, in my opinion.  That will prevent even HTTP/1.1
clients/proxies from caching.


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