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在实际运维中，为了提高web页面的访问加载速度，一般会把静态资源（比如js、css、img等）在服务器进行压缩再传输到客户浏览器，主要配置步骤如下：
环境：Centos
1、Vim打开Nginx配置文件
vim /etc/nginx/nginx.conf
2、找到如下一段，进行修改
gzip on; // 开启Gzip
gzip_min_length 1k; // 不压缩临界值，大于1K的才压缩，一般不用改
gzip_buffers 4 16k; // buffer，就是，嗯，算了不解释了，不用改
#gzip_http_version 1.0; // 用了反向代理的话，末端通信是HTTP/1.0，有需求的应该也不用看我这科普文了；有这句的话注释了就行了，默认是HTTP/1.1
gzip_comp_level 2; // 压缩级别，1-10，数字越大压缩的越好，时间也越长！
gzip_types text/plain application/x-javascript application/javascript text/javascript text/css application/xml application/x-httpd-php image/jpeg image/gif image/png; // 进行压缩的文件类型，缺啥补啥就行了，JavaScript有两种写法，最好都写上吧，总有人抱怨js文件没有压缩，其实多写一种格式就行了
gzip_vary off; // 跟Squid等缓存服务有关，on的话会在Header里增加"Vary: Accept-Encoding"，我不需要这玩意，自己对照情况看着办吧
gzip_disable "MSIE [1-6]\."; // IE6对Gzip不怎么友好，不给它Gzip了
3、:wq保存退出，重新加载Nginx
nginx -s reload
4、用curl测试Gzip是否成功开启
curl -I -H "Accept-Encoding: gzip, deflate" "http://www.slyar.com/blog/"
HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: Sun, 26 Aug 2012 18:13:09 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
X-Powered-By: PHP/5.2.17p1
X-Pingback: http://www.slyar.com/blog/xmlrpc.php
Content-Encoding: gzip
页面成功压缩
curl -I -H "Accept-Encoding: gzip, deflate" "http://www.slyar.com/blog/wp-content/plugins/photonic/include/css/photonic.css"
HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: Sun, 26 Aug 2012 18:21:25 GMT
Content-Type: text/css
Last-Modified: Sun, 26 Aug 2012 15:17:07 GMT
Connection: keep-alive
Expires: Mon, 27 Aug 2012 06:21:25 GMT
Cache-Control: max-age=43200
Content-Encoding: gzip
css文件成功压缩
curl -I -H "Accept-Encoding: gzip, deflate" "http://www.slyar.com/blog/wp-includes/js/jquery/jquery.js"
HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: Sun, 26 Aug 2012 18:21:38 GMT
Content-Type: application/x-javascript
Last-Modified: Thu, 12 Jul 2012 17:42:45 GMT
Connection: keep-alive
Expires: Mon, 27 Aug 2012 06:21:38 GMT
Cache-Control: max-age=43200
Content-Encoding: gzip
js文件成功压缩
curl -I -H "Accept-Encoding: gzip, deflate" "http://www.slyar.com/blog/wp-content/uploads/2012/08/2012-08-23_203542.png"
HTTP/1.1 200 OK
Server: nginx/1.0.15
Date: Sun, 26 Aug 2012 18:22:45 GMT
Content-Type: image/png
Last-Modified: Thu, 23 Aug 2012 13:50:53 GMT
Connection: keep-alive
Expires: Tue, 25 Sep 2012 18:22:45 GMT
Cache-Control: max-age=2592000
Content-Encoding: gzip
图片成功压缩