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how can i send proxy cache file's if-modified-since info to backend server?

October 22, 2009 04:32AM
hi all

i use nginx proxy cache to cache file from backend server, and when the cache are timeout, nginx will proxy the first request from client to backend server, and delete the old cache file in nginx

but , if the backend file are not modified , nginx will not know, and delete the cache also.

with squid , it will send an i-m-s header to backend server to confirm that cache need to be update or not

can you tell me , how could nginx do it ?
Subject Author Posted

how can i send proxy cache file's if-modified-since info to backend server?

shineyear October 22, 2009 04:32AM



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