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From "Jergen Dutch" <jergendu...@gmail.com>
Subject [users@httpd] Intelligent/automatic cache expiry based on mtime
Date Fri, 07 Dec 2007 09:16:29 GMT
Hi list,

I have an application that loads a lot of images off a server every 60
seconds. I want the client's browser to cache the images because they almost
never change.

In the rare cases where an image does change, I would like to invalidate the
client's cached copy of the image.

I could do this with a script, but it seems such a simple and generic thing
that Apache must surely already provide this (I can't find it though).

Can I add a cache-invalidation header for .jpg files modified in the past
120 seconds?

Thanks.

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