http://jackxiang.com/index.php zh-cn http://jackxiang.com/post// jack <xdy108@126.com> Mon, 11 Jul 2011 06:56:45 +0000 http://jackxiang.com/post// 一.让ngx_cache_purge来帮忙，通过Nginx对ctrl+f5的标志来进行重写清除日志。
二.用PHP来实现清除后并再次跳转到对应的Uri模块,以实现页面缓存更新后的显示。
三.修改ngx_cache_purge源代码。。。。：（暂时忽略。
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方法一：

步骤1：需要编译安装ngx_cache_purge这个模块让它来对缓存进行清理。
./configure --user=www --group=www --prefix=/usr/local/webserver/nginx --with-http_stub_status_module --with-http_ssl_module   --add-module=/root/software/nginx_http_push_module-0.692   --add-module=/root/software/ngx_cache_purge-1.3

步骤2：
nginx.conf中加入对Ctrl+F5刷新的标志判断并UrlRewrite：
#limit_zone  crawler  $binary_remote_addr  10m; fastcgi_cache_path /data0/proxy_temp_dir  levels=1:2  keys_zone=cache_php:30m inactive=1d max_size=1g; fastcgi_temp_path /data0/ngx_fcgi_tmp; location ~ /purge(/.*) {   fastcgi_cache_purge cache_php $host$1$is_args$args; } if ( $request_method = "PURGE" ) { rewrite ^(.*)$ /purge$1 last; } #limit_conn   crawler  20;     location ~ .*\.(php|php5)?$ {         #fastcgi_pass  unix:/tmp/php-cgi.sock;   fastcgi_pass  127.0.0.1:9000;   fastcgi_index index.php;   include fcgi.conf;   #以下是fastcgi_cache的配置   fastcgi_cache   cache_php;   fastcgi_cache_valid   200 302  1h;   fastcgi_cache_min_uses  1;   fastcgi_cache_use_stale error  timeout invalid_header http_500;   #fastcgi_cache_key http://$host$request_uri;   fastcgi_cache_key $host$uri$is_args$args;   if ($http_Cache_Control ~ "no-cache")   {     set $http_Cache_Control 'max-age=604800';     rewrite ^(.*)$ /purge$1 last;   } }

对已经缓存的页面用Ctrl+F5后出现：
Successful purge

Key : jackxiang.com/read.php?entryid=4454&page=&part=
Path: /data0/proxy_temp_dir/c/b8/ea9939947c0cf37b9cae885987876b8c
nginx/1.0.4

清理成功！！
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方法二：
步骤1：
用PHP来实现，其Nginx配置代码修改为：
#limit_zone  crawler  $binary_remote_addr  10m; fastcgi_cache_path /data0/proxy_temp_dir  levels=1:2  keys_zone=cache_php:30m inactive=1d max_size=1g; fastcgi_temp_path /data0/ngx_fcgi_tmp; location ~ /purge(/.*) {   fastcgi_pass   127.0.0.1:9000;   include        fastcgi_params;   fastcgi_param  SCRIPT_FILENAME    /data0/htdocs/blog/purge.php;   error_page 405 =200 /purge$1; } if ( $request_method = "PURGE" ) { rewrite ^(.*)$ /purge$1 last; } #limit_conn   crawler  20;     location ~ .*\.(php|php5)?$ {         #fastcgi_pass  unix:/tmp/php-cgi.sock;   fastcgi_pass  127.0.0.1:9000;   fastcgi_index index.php;   include fcgi.conf;   #以下是fastcgi_cache的配置   fastcgi_cache   cache_php;   fastcgi_cache_valid   200 302  1h;   fastcgi_cache_min_uses  1;   fastcgi_cache_use_stale error  timeout invalid_header http_500;   #fastcgi_cache_key http://$host$request_uri;   fastcgi_cache_key $host$uri$is_args$args;   if ($http_Cache_Control ~ "no-cache")   {     set $http_Cache_Control 'max-age=604800';     rewrite ^(.*)$ /purge$1 last;   } }
步骤2：
通过UrlRewrite后的结果到purge.php后进行Md5目录规则的删除，并再次刷新该页面，
purge.php代码如下：
<?php @header("Content-Type: text/html; charset=utf-8"); @header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); @header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); @header("Cache-Control: no-store, no-cache, must-revalidate"); @header("Pragma: no-cache"); $host = isset($_SERVER['HTTP_X_FORWARDED_HOST']) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : ''); //uri function request_uri() {   if (isset($_SERVER['REQUEST_URI']))   {     $uri = $_SERVER['REQUEST_URI'];   }   else   {     if (isset($_SERVER['argv']))     {       $uri = $_SERVER['PHP_SELF'] .'?'. $_SERVER['argv'][0];     }     else     {       $uri = $_SERVER['PHP_SELF'] .'?'. $_SERVER['QUERY_STRING'];     }   }   return $uri; } $uri = request_uri(); $url = "http://".$host.$uri; $md5 = md5($url); $cacheRoot = "/data0/proxy_temp_dir"; $cacheFile = $cacheRoot . '/' . substr($md5, -1, 1) . '/' . substr($md5, -3, 2) . '/' . $md5; if(is_file($cacheFile)) {   @unlink($cacheFile); } echo '<script language="javascript" type="text/javascript">'; echo "window.location.href='{$url}'"; echo '</script>'; ?>




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