1. 在 Apache 的写法

RewriteCond  %{HTTP_HOST}  nginx.org

RewriteRule  (.*)          http://www.nginx.org$1

在 Nginx 可以对应写成：

server {

    listen       80;

    server_name  www.nginx.org  nginx.org;

    if ($http_host = nginx.org) {

        rewrite  (.*)  http://www.nginx.org$1;

    }

    ...

}

但 Nginx 作者更建议的方法是：

server {

    listen       80;

    server_name  nginx.org;

    rewrite   ^  http://www.nginx.org$request_uri?;

}



server {

    listen       80;

    server_name  www.nginx.org;

    ...

}

2. 在 Mongrel的写法：

DocumentRoot /var/www/myapp.com/current/public



RewriteCond %{DOCUMENT_ROOT}/system/maintenance.html -f

RewriteCond %{SCRIPT_FILENAME} !maintenance.html

RewriteRule ^.*$ %{DOCUMENT_ROOT}/system/maintenance.html [L]



RewriteCond %{REQUEST_FILENAME} -f

RewriteRule ^(.*)$ $1 [QSA,L]



RewriteCond %{REQUEST_FILENAME}/index.html -f

RewriteRule ^(.*)$ $1/index.html [QSA,L]



RewriteCond %{REQUEST_FILENAME}.html -f

RewriteRule ^(.*)$ $1/index.html [QSA,L]



RewriteRule ^/(.*)$ balancer://mongrel_cluster%{REQUEST_URI} [P,QSA,L]

在 Nginx可对应写成

location / {

    root       /var/www/myapp.com/current/public;



    try_files  /system/maintenance.html

               $uri  $uri/index.html $uri.html

               @mongrel;

}



location @mongrel {

    proxy_pass  http://mongrel;

}

这个就比Apache 的简化多了。