> -----Original Message-----
> From: Bill Moseley [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, November 15, 2000 1:12 PM
> To: Geoffrey Young; '[EMAIL PROTECTED]'
> Subject: Re: [RFC] Apache::Expires
>
>
> At 10:26 AM 11/15/00 -0500, Geoffrey Young wrote:
> >hi all...
> >
> >I was wondering if anyone has some experience with expire headers for
> >dynamic documents - kinda like mod_expires but for dynamic stuff.
>
> Geoff,
>
> Are you thinking about client/browsers or proxy caching with regard to
> this? Or does it matter?
I was thinking about client/browser stuff specifically, but I guess properly
formed headers apply to both :)
>
> I currently use Last-modified and Content-length headers in my dynamic
> content that doesn't change much, but I've never considered
> using Expires,
> but maybe it's because I'm not fully up on what help Expires does.
I keep forgetting that Expires is _supposed_ to be a proxy thing - the
official MS documentation says that MSIE caches based on Expires, though.
(http://support.microsoft.com/support/kb/articles/Q234/0/67.ASP)
I dunno about the rest...
--Geoff
>
> I have assumed that most browsers cache my documents and
> don't re-request
> them in their current session
> so am I correct that Expires
> would only help
> for cases of browsers/clients that return to the page sometime in the
> future yet before the document Expires, and after closing
> their browser? I
> wonder how to determine how many requests that would save.
>
> Also, if a cached document is past its Expired time, does
> that force the
> client to get a new document, or can it still use If-Modified-Since?
> mod_expires indicates that a new document must be loaded, but RFC 2616
> indicates that it can use If-Modified-Since (who know what
> the clients will
> do).
>
> I should know this too, but what effect does the presence of
> a query string
> in the URL have on this?
>
>
> Bill Moseley
> mailto:[EMAIL PROTECTED]
>
