讲这些语句加到squid配置里面 我用的是 squid 2.5

refresh_pattern .               0       20%     4320
refresh_pattern -i \.(htm|html|txt|js)$         0       66%     1440    reload-into-ims
refresh_pattern -i \.(bmp|gif|jpg|png|swf)$     0       66%     4320   reload-into-ims