nginx fastcgi_cache

参考 

http://www.cnxct.com/several-reminder-in-nginx-fastcgi_cache-and-php-session_cache_limiter

http://nginx.org/en/docs/http/ngx_http_fastcgi_module.html#fastcgi_cache

fastcgi_cache_path /data/files/game/nginxCache/content levels=1:2 keys_zone=Hpp:250m inactive=1d max_size=1G;
fastcgi_temp_path /data/files/game/nginxCache/temp;
fastcgi_cache_key "$scheme$request_method$host$request_uri$is_args$args";
fastcgi_cache_use_stale error timeout invalid_header http_500;
#nocache
fastcgi_ignore_headers "Cache-Control" "Expires" "Set-Cookie";

server{
set $skip_cache 0;
#post访问不缓存
if ($request_method = POST) {
set $skip_cache 1;
}
#动态查询不缓存
if ($query_string ~* "nonocache") {
set $skip_cache 1;
}
#后台等特定页面不缓存（其他需求请自行添加即可）
if ($request_uri ~* "users") {
set $skip_cache 1;
}
if ($request_uri ~* "reply.php") {
set $skip_cache 1;
}
#对登录后的结果缓存(hehe就是一个判断登录与否的Cookei名称）
if ($http_cookie ~* "ECM_ID") {
set $skip_cache 1;
}

fastcgi_cache_bypass $skip_cache;
fastcgi_no_cache $skip_cache;
add_header X-Cache "$upstream_cache_status From $host";
add_header KCache "$scheme$request_method$host$request_uri$is_args$args";
fastcgi_cache Hpp;
fastcgi_cache_valid 200 301 302 1d;
}

fastcgi_cache的清除需要使用ngx_cache_purge这个模块.

ngx_cache_purge 是 nginx 的第三方那个模块，用于清除
FastCGI, proxy, SCGI and uWSGI 缓存

参考：

点击打开链接https://www.cnhzz.com/nginx_cache_purge/

点击打开链接http://54im.com/nginx/ngx_cache_purge.html

或者

自己写方法删除缓存目录下的文件

举例：

fastcgi_cache_path /www/php_cache  levels=1:2  keys_zone=cache_php:30m inactive=1d max_size=10g;

1:2会生成16*256个字目录

root@vbstevena nginxCache # find . -type f
./content/8/2d/4573270729c3db4e26e68198e5a1c2d8
./content/4/81/75a8c077cb22d087cf61c233a2184814
./content/1/6e/a4a589e68d5352e716f4033d01c026e1

<?php
function purgeCache()
{
$url = $this->post('url');

if (empty($url) || !Cola_Com_Validate::url($url)) {
exit('请输入正确的URL。');
}

$md5 = md5($url);
$cacheFile = $this->_cacheRoot . '/' . substr($md5, -1) . '/' . substr($md5, -3, 2) . '/' . $md5;

if (!file_exists($cacheFile)) {
exit('缓存不存在。');
}

if (@unlink($cacheFile)) {
echo '清除缓存成功。';
} else {
echo '清除缓存失败。';
}
}

参考：点击打开链接http://www.lvtao.net/server/224.html#comment-1904