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<DIV><FONT color=#000000 size=3 face=宋体>hi all,</FONT></DIV>
<DIV><FONT face=宋体></FONT> </DIV>
<DIV><FONT face=宋体>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.</FONT></DIV>
<DIV><FONT color=#000000 size=3 face=宋体></FONT> </DIV>
<DIV align=left><FONT color=#c0c0c0 size=2
face=Verdana>2011-09-06</FONT></DIV><FONT size=2 face=Verdana>
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<DIV><FONT color=#c0c0c0 size=2 face=Verdana><SPAN
id=_FlashSignName>chinix</SPAN></FONT></DIV></FONT></DIV></BODY></HTML>