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Jun 21, 2009, 21:15 #1
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Controlling Caching with HTTP Headers
Okay, I have a relatively simple question, but I'm not sure if I know the 100% correct answer.
Let's say I have a file, named "big-archive.zip". I have handy the time when it was last modified. How should you set the HTTP headers to tell a browser that it should cache this file, but re-download it when it has been modified since it was last cached?