squid缓存动态连接

由于网站的访问量越来越大，用户播放视频，都要从web服务器拿文件，而且又是动态连接，要调用一个php-cgi进程，这样的话很浪费资源，所以要加缓存服务器。但是问题来了，squid 默认是不缓存动态页面的，google 了半天，发现很多人的文章没有一个说到正点上的。最后自己不停的做测试，看squid.conf.documented，把问题解决了，所以就记录下来，以便以后大家遇到同样的问题。好解决。 列子：

http://www.nginxs.com/nginx/Grec.php?id=eric&b.php?=aaa

首选用 curl 抓 head头。

nginx $> curl -I http://www.nginxs.com/nginx/Grec.php
HTTP/1.1 200 OK
Server: nginx
Date: Fri, 27 Aug 2010 06:49:43 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Vary: Accept-Encoding
X-Powered-By: PHP/5.2.13
Set-Cookie: PHPSESSID=2d4523a7c6a5a54dbb20f64f3bc04be3; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache

看红字部分，然后在看 squid.conf.documented 对应的部分

#       options: override-expire
#                override-lastmod
#                reload-into-ims
#                ignore-reload
#                ignore-no-cache
#                ignore-no-store
#                ignore-must-revalidate
#                ignore-private
#                ignore-auth
#                refresh-ims
#

把 Cache-Control 的信息，squid对应有违规则 那么我们修改 squid.conf

nginx $> vim /usr/local/squid/etc/squid.conf
# 添加如下：
acl nginx urlpath_regex ^/nginx/Grec.php
acl QUERY urlpath_regex cgi-bin \? \.php
no_cache allow nginx
no_cache deny QUERY

refresh_pattern -i ^http://www.nginxs.com/nginx/Grec.php      1440    50%     10080   override-expire override-lastmod reload-into-ims ignore-reload ignore-no-cache ignore-no-store ignore-must-revalidate

保存 重启 squid 然后访问网站查看 日志

nginx $> tailf /usr/local/squid/var/logs/access.log
1282112874.863    124 xxx.xxx.xx.xxx TCP_MEM_HIT/200 225990 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg
1282112874.919    176 xxx.xxx.xx.xxx TCP_MEM_HIT/200 155673 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg
1282112874.946    203 xxx.xxx.xx.xxx TCP_MEM_HIT/200 237069 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg
1282112874.948    225 xxx.xxx.xx.xxx TCP_MEM_HIT/200 228811 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg
1282112874.973    230 xxx.xxx.xx.xxx TCP_MEM_HIT/200 195373 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg
1282112874.985    242 xxx.xxx.xx.xxx TCP_MEM_HIT/200 241978 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg
1282112875.021    197 xxx.xxx.xx.xxx TCP_MEM_HIT/200 201420 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg
1282112875.032    185 xxx.xxx.xx.xxx TCP_MEM_HIT/200 259924 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg
1282112875.046    160 xxx.xxx.xx.xxx TCP_MEM_HIT/200 226011 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg
1282112875.071    176 xxx.xxx.xx.xxx TCP_MEM_HIT/200 256656 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg
1282112875.106    177 xxx.xxx.xx.xxx TCP_MEM_HIT/200 223641 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg
1282112875.125    167 xxx.xxx.xx.xxx TCP_MEM_HIT/200 223972 GET http://www.nginxs.com/nginx/Grec.php? - NONE/- image/jpeg