nginx expires 无效：配置报错 

server {
        listen       80;
        server_name  abcdefg.cn;

        location / {
            root   html/abcdefg.cn;
            index  index.php index.html index.htm;
		if (!-f $request_filename){
			set $rule_1 1$rule_1;
		}
		if (!-d $request_filename){
			set $rule_1 2$rule_1;
		}
		if ($rule_1 = "21"){
			rewrite /. /index.php last;
		}
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        location ~ \.php$ {
            root           html/abcdefg.cn;
            fastcgi_pass   unix:/var/run/php-fpm.socket;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME  /usr/local/nginx/html/abcdefg.cn$fastcgi_script_name;
            include        fastcgi_params;
        }

	
        location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
                expires max;
                log_not_found off;
        }

    }

location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
                expires max;
                log_not_found off;
        }