nginx图片文件压缩配置方法

查看ngix编译参考，是否启用了gzip模块，运行命令：

(我的nginx在PATH目录里，故命令中可以省略nginx所在的目录)，写为nginx -t 即可，下文从略写
注意其中是否 --with-http_gzip_static_module，如果没有，那就自己编译一次吧，下面是我的配置参数，供参考。最后的--add-module=../nginx-lib/nginx-upload-progress-module-v0.9.0/是nginx上传进度模块，nginx第三方模块，源码放置在../nginx-lib/nginx-upload-progress-module-v0.9.0目录，如果你没有下载过该模块，去掉它就可以了。

nginx version: nginx/1.2.0
configure arguments: --prefix=/usr/local/nginx --sbin-path=/usr/local/sbin/nginx --conf-path=/usr/local/conf/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --with-http_stub_status_module --with-http_gzip_static_module --with-http_sub_module --with-http_flv_module --with-http_mp4_module --with-http_random_index_module --with-cpu-opt=pentium4 --add-module=../nginx-lib/nginx-upload-progress-module-v0.9.0/

修改nginx配置文件，nginx配置文件目录参看nginx配置参数里的--conf-path

nginx要修改两处，在虚拟主机配置段中添加：

location ~* ^.+.gzjs$ {
add_header Content-Encoding gzip;
gzip off;
}

另外再修改nginx的mime文件，在application/x-javascript js;中添加gzjs

application/x-javascript js gzjs;

我的配置代码

gzip on;
gzip_min_length 1k;
gzip_buffers 8 32k;
gzip_http_version 1.0;
gzip_comp_level 5;
gzip_types text/plain application/x-javascript text/javascript text/css application/xml;
gzip_vary on;

注解

1.开启Gzip

2.临界值小于1k 的文件不压缩，0为全压缩。
3.buffer大小
4.用于识别http协议的版本，早期的浏览器不支持gzip压缩，用户会看到乱码，所以为了支持前期版本加了此选项,目前此项基本可以忽略
5.压缩级别，1-9，数字越大压缩率越高越费CPU。
6.设置需要压缩的MIME类型,非设置值不进行压缩。JavaScript 两种写法都添加了，网络图片本身都是压缩格式了就不再压缩了。
7.加个vary头，给代理服务器用的，有的浏览器支持压缩，有的不支持。因此，为避免浪费不支持的也压缩，需要根据客户端的HTTP头来判断，是否需要压缩。

测试

curl -I http://www.111cn.net/ -H Accept-Encoding:gzip,defalte

下在补充

#nginx开启gzip压缩，放在location内

gzip on;
gzip_min_length 1000;
gzip_buffers 4 8k;
gzip_http_version 1.1;
gzip_types text/text text/html text/plain text/xml
text/css application/x-javascript application/javascript;

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

gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
#gzip_http_version 1.0;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml text/javascript application/x-httpd-php image/jpeg image/gif image/png;
gzip_vary off;
gzip_disable "MSIE [1-6].";

用curl测试Gzip是否成功开启

curl -I -H "Accept-Encoding: gzip, deflate" "/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: /blog/xmlrpc.php
Content-Encoding: gzip

页面成功压缩

curl -I -H "Accept-Encoding: gzip, deflate" "/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" "/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" "/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" "/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