nginx的cache功能(修正版)
location ~ /purge(/.*) {allow 127.0.0.1;
allow 192.168.1.0/24;
deny all;
proxy_cache_purge cache_one $host$1$is_args$args;
}
# 设置缓存的文件类型,建议在后端设置缓存时间通过expires cache-control:max-age=
location ~ .*\.(gif|jpg|png|bmp|swf|js|css)$
{
proxy_cache cache_one;
# 在cache端强制设置缓存时间
proxy_cache_valid 200 304 12h;
proxy_cache_valid 301 302 1m;
proxy_cache_valid any 1m;
proxy_cache_key $host$uri$is_args$args;
#####
add_header X-Cache $upstream_cache_status;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_pass http://my_server_pool;
}
}
四.测试
访问 http://xxxx/logo.jpg
命中率：
#!/bin/bash
# author:gupeng
# proxy_cache hit rate
if [ "$1" != '' ];then
if [ -e "$1" ];then
HIT=`cat $1 | grep HIT | wc -l`
ALL=`cat $1 | wc -l`
Hit_rate=`echo "scale=2;($HIT/$ALL)*100" | bc`
echo "Hit rate=$Hit_rate%"
else
echo "$1 not exsist!"
fi
else
echo "usage: ./hit_rate.sh file_path"
fi
五、命中状态说明
$upstream_cache_status
Appeared in 0.8.3. Possible values:
·MISS
·EXPIRED - expired, request was passed to backend 请求被传送到后端
·UPDATING - expired, stale response was used due to proxy/fastcgi_cache_use_stale
updating 正在更新，将使用旧的应答
·STALE - expired, stale response was used due to proxy/fastcgi_cache_use_stale 后端将
得到过期的应答
·HIT
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