window nginx codeigniter rewrite

apache下只用。htaccess

RewriteEngine on
RewriteCond $1 !^(index\.php|css|themes|images|robots\.txt)
RewriteRule ^(.*)$ index.php/$1 [L]

nginx不支持rewriteCond,nginx配置方法：

server { 
        listen          80; 
        server_name     act; 
        location / {
            root   D:/ci_act;
            index  index.html index.htm index.php;
            autoindex on;
            rewrite ^/$ /index.php last;
            rewrite ^/(?!index\.php|css|themes|images|robots\.txt)(.*)$ /index.php/$1 last;
        }
        location ~ ^(.+\.php)(.*)$ {
           fastcgi_pass   127.0.0.1:9000;
           fastcgi_index        index.php;
           fastcgi_split_path_info ^(.+\.php)(.*)$;
           fastcgi_param        PATH_INFO                $fastcgi_path_info;
           fastcgi_param        PATH_TRANSLATED        D:/ci_act$fastcgi_path_info;
           fastcgi_param  SCRIPT_FILENAME  D:/ci_act$fastcgi_script_name;
           include        fastcgi_params;
        }
    }