proxy with header If-Modified-Since

chinix chinix at
Tue Sep 6 14:39:56 UTC 2011

hi all,

I find that when the cache is expired,nginx request completely to backend for fresh cache even the file wasn't modified.Could nginx request to backend with header "If-Modified-Since" when the cache is expired? If this,backend will response with code 304, nginx should deal with the 304 response.


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