Nginx笔记：对url中携带的参数进行多次判断

location / {
                proxy_set_header        Host $host;
                proxy_set_header        X-Real-IP $remote_addr;
                proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
                set $res 0;
                if ($arg_width ~ \d+){
                    set $res "${res}1";
                }
                if ($arg_height ~ \d+){
                    set $res "${res}1";
                }
                if ($res = "011"){
                    proxy_pass              http://pe.cut;
                    access_log              /dev/null;
                }
                #if ($res != "011"){
        #    return http://xxx.xxx.xxx;    
                #}
    }