gzip压缩 测试环境：debian 6
1、vim打开nginx配置文件
vim /usr/local/nginx/conf/nginx.conf
2、找到如下一段，进行修改
3、配置节说明
第1行：开启gzip
第2行：不压缩临界值，大于1k的才压缩，一般不用改
第3行：buffer，就是，嗯，算了不解释了，不用改
第4行：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
第5行：压缩级别，1-10，数字越大压缩的越好，时间也越长，看心情随便改吧
第6行：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
第7行：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
第8行：ie6对gzip不怎么友好，不给它gzip了
4、:wq保存退出，重新加载nginx
/usr/local/nginx/sbin/nginx -s reload
5、用curl测试gzip是否成功开启
curl -i -h "accept-encoding: gzip, deflate" "http://www.jb200.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.jb200.com/blog/xmlrpc.php
content-encoding: gzip
页面成功压缩
curl -i -h "accept-encoding: gzip, deflate" "http://www.jb200.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.jb200.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.jb200.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
curl -i -h "accept-encoding: gzip, deflate" "http://www.jb200.com/blog/wp-content/plugins/wp-multicollinks/wp-multicollinks.css"
http/1.1 200 ok
server: nginx/1.0.15
date: sun, 26 aug 2012 18:23:27 gmt
content-type: text/css
content-length: 180
last-modified: sat, 02 may 2009 08:46:15 gmt
connection: keep-alive
expires: mon, 27 aug 2012 06:23:27 gmt
cache-control: max-age=43200
accept-ranges: bytes
最后来个不到1k的文件，由于我的阈值是1k，所以没压缩。