I can't get browser caching to work. The avatar images are re-downloaded by the browser on every request. It appears to be the same problem described here:
I have experimented with various headers including:
I can manually return the 304 status code in the script, but on what condition? I have been unsuccessful in getting any kind of cache validation to work. And I can't arbitrarily return 304 on every request or it won't download on the initial request.
I welcome any ideas.
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