server {

    listen       80;

    server_name  tirion.me www.tirion.me;

    # note that these lines are originally from the "location /" block

    root   /home/www/wordpress;

    index index.php index.html index.htm;

    location / {

        try_files $uri $uri/ =404;

    }

    error_page 404 /404.html;

    error_page 500 502 503 504 /50x.html;

    location = /50x.html {

        root /usr/share/nginx/html;

    }

    location ~ \.php$ {

        try_files $uri =404;

        fastcgi_pass unix:/var/run/php-fpm/php-fpm.sock;

        fastcgi_index index.php;

        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;

        include fastcgi_params;

    }

    # 配置 HTTP 强缓存静态文件，通过 Response Header 头返回

    location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|js|css)$ {

        expires 3d;

    }

}

Cache-Control: max-age=31536000

这些文件就不会再从服务器重新获取，而是直接从浏览器的缓存中获取，从而提高网络性能。