I wasn't aware of the ETag (it sounds useful), but I'm not sure how to use it in practice.

Image requests are handled by Apache not my code. Without using something like mod_perl, how would I intercept the request and set an appropriate ETag? Where would I get the version number from?

In reply to Re^4: Slightly OT: Stop caching images by astroboy
in thread Slightly OT: Stop caching images by astroboy

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