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

> From: William A. Rowe, Jr. [mailto:wrowe@covalent.net]

> > 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.

Joshua.


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