主要是对我的个人博客的PHP执行代码进行Cache，对于Js，CSS直接在客户端缓存即可，这儿重点是对PHP的CGI执行结果在服务器端进行缓存，以减少服务器的DB查询压力，这样DB从21次/秒降低到13次/秒。目前让nginx的proxy_store和proxy_cache支持ctrl+f5和PURGE结合删除缓存的方法二种：
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。
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./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：
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#limit_zone crawler $binary_remote_addr 10m;
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fastcgi_cache_path /data0/proxy_temp_dir levels=1:2 keys_zone=cache_php:30m inactive=1d max_size=1g;
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fastcgi_temp_path /data0/ngx_fcgi_tmp;
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location ~ /purge(/.*)
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{
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fastcgi_cache_purge cache_php $host$1$is_args$args;
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}
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if ( $request_method = "PURGE" ) {
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rewrite ^(.*)$ /purge$1 last;
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}
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#limit_conn crawler 20;
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location ~ .*\.(php|php5)?$
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{
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#fastcgi_pass unix:/tmp/php-cgi.sock;
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fastcgi_pass 127.0.0.1:9000;
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fastcgi_index index.php;
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include fcgi.conf;
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#以下是fastcgi_cache的配置
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fastcgi_cache cache_php;
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fastcgi_cache_valid 200 302 1h;
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fastcgi_cache_min_uses 1;
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fastcgi_cache_use_stale error timeout invalid_header http_500;
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#fastcgi_cache_key http://$host$request_uri;
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fastcgi_cache_key $host$uri$is_args$args;
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if ($http_Cache_Control ~ "no-cache")
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{
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set $http_Cache_Control 'max-age=604800';
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rewrite ^(.*)$ /purge$1 last;
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}
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}
对已经缓存的页面用Ctrl+F5后出现：
Successful purge
Key : justwinit.cn/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：
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#limit_zone crawler $binary_remote_addr 10m;
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fastcgi_cache_path /data0/proxy_temp_dir levels=1:2 keys_zone=cache_php:30m inactive=1d max_size=1g;
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fastcgi_temp_path /data0/ngx_fcgi_tmp;
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location ~ /purge(/.*)
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{
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fastcgi_pass 127.0.0.1:9000;
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include fastcgi_params;
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fastcgi_param SCRIPT_FILENAME /data0/htdocs/blog/purge.php;
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error_page 405 =200 /purge$1;
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}
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if ( $request_method = "PURGE" ) {
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rewrite ^(.*)$ /purge$1 last;
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}
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#limit_conn crawler 20;
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location ~ .*\.(php|php5)?$
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{
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#fastcgi_pass unix:/tmp/php-cgi.sock;
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fastcgi_pass 127.0.0.1:9000;
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fastcgi_index index.php;
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include fcgi.conf;
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#以下是fastcgi_cache的配置
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fastcgi_cache cache_php;
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fastcgi_cache_valid 200 302 1h;
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fastcgi_cache_min_uses 1;
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fastcgi_cache_use_stale error timeout invalid_header http_500;
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#fastcgi_cache_key http://$host$request_uri;
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fastcgi_cache_key $host$uri$is_args$args;
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if ($http_Cache_Control ~ "no-cache")
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{
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set $http_Cache_Control 'max-age=604800';
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rewrite ^(.*)$ /purge$1 last;
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}
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}
步骤2：
通过UrlRewrite后的结果到purge.php后进行Md5目录规则的删除，并再次刷新该页面，
purge.php代码如下：
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<?php
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@header("Content-Type: text/html; charset=utf-8");
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@header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
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@header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
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@header("Cache-Control: no-store, no-cache, must-revalidate");
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@header("Pragma: no-cache");
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$host = isset($_SERVER['HTTP_X_FORWARDED_HOST']) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : '');
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//uri
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function request_uri()
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{
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if (isset($_SERVER['REQUEST_URI']))
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{
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$uri = $_SERVER['REQUEST_URI'];
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}
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else
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{
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if (isset($_SERVER['argv']))
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{
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$uri = $_SERVER['PHP_SELF'] .'?'. $_SERVER['argv'][0];
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}
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else
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{
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$uri = $_SERVER['PHP_SELF'] .'?'. $_SERVER['QUERY_STRING'];
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}
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}
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return $uri;
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}
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$uri = request_uri();
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$url = "http://".$host.$uri;
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$md5md5 = md5($url);
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$cacheRoot = "/data0/proxy_temp_dir";
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$cacheFile = $cacheRoot . '/' . substr($md5, -1, 1) . '/' . substr($md5, -3, 2) . '/' . $md5;
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if(is_file($cacheFile))
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{
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@unlink($cacheFile);
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}
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echo '<script language="javascript" type="text/javascript">';
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echo "window.location.href='{$url}'";
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echo '</script>';
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?>
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(责任编辑：IT) |
