Why are my obsolete headers not allowing my files to remain in the cache?

Question

I use valid expiration dates and cache-free headers for my static files, and they remain cached for as long as I continue to browse, but when I close my browser and use it after a while, I see that the static files load again. even if not updated with ctrl (+ shift) + r

I use Firefox, the cache size is set to 250 MB, and I do not allow it to delete any private or cached data.

Headers: Accept-Ranges: byte Cache-Control: max-age = 29030400, public Content-length: 142061 Content-Type: image / png Date: Tue, 08 Dec 2009 19:18:43 GMT Expires: Tue, 09 Nov. 2010 19:18:43 GMT Last change: Sun, Jan 18. 2009 18:33:48 GMT Server: Apache / 2.2.14 (EL)

Answer 1

What version of Firefox? Server sends Etags for static files? You can view cache information for Firefox by going to cache and poking. This will give you an idea of ​​what Firefox caches.

. , , max-age , , , Expires. . HTTP 1.1 : http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.3.

Expires , max-age , . , HTTP/1.1 ( ), HTTP/1.0 . , HTTP/1.0 , , - .

Cache-Control, .