转换重写规则

    像这样：

    1. server {
    2.     listen       80;
    3.     server_name  www.example.org  example.org;
    4.     if ($http_host = example.org) {
    5.         rewrite  (.*)  http://www.example.org$1;
    6.     }
    7.     ...
    8. }

    这是一个错误、麻烦而无效的做法。正确的方式是为 example.org 定义一个单独的服务器：

    1. server {
    2.     listen       80;
    3.     server_name  example.org;
    4.     return       301 http://www.example.org$request_uri;
    5. }
    7. server {
    8.     listen       80;
    9.     server_name  www.example.org;
    10. }

    另一个例子是使用了颠倒逻辑，即 所有不是 example.com 和 的：

    1. RewriteCond  %{HTTP_HOST}  !example.com
    2. RewriteCond  %{HTTP_HOST}  !www.example.com
    3. RewriteRule  (.*)          http://www.example.com$1

    应该简单地定义 example.com、www.example.com 和 其他一切：

    1. server {
    2.     listen       80;
    3.     server_name  example.com www.example.com;
    4.     ...
    5. }
    7. server {
    8.     listen       80 default_server;
    9.     server_name  _;
    10.     return       301 http://example.com$request_uri;
    11. }

    典型的 Mongrel 规则：

    1. DocumentRoot /var/www/myapp.com/current/public
    3. RewriteCond %{DOCUMENT_ROOT}/system/maintenance.html -f
    4. RewriteCond %{SCRIPT_FILENAME} !maintenance.html
    5. RewriteRule ^.*$ %{DOCUMENT_ROOT}/system/maintenance.html [L]
    6. RewriteCond %{REQUEST_FILENAME} -f
    7. RewriteRule ^(.*)$ $1 [QSA,L]
    9. RewriteCond %{REQUEST_FILENAME}/index.html -f
    10. RewriteRule ^(.*)$ $1/index.html [QSA,L]
    12. RewriteCond %{REQUEST_FILENAME}.html -f
    13. RewriteRule ^(.*)$ $1.html [QSA,L]
    15. RewriteRule ^/(.*)$ balancer://mongrel_cluster%{REQUEST_URI} [P,QSA,L]

    应该转换为：

    1. location / {
    2.     root       /var/www/myapp.com/current/public;
    4.     try_files  /system/maintenance.html
    5.                $uri  $uri/index.html $uri.html
    6.                @mongrel;
    7. }
    9. location @mongrel {
    10.     proxy_pass  http://mongrel;