给Tomcat，Apache配置gzip压缩
[网站提速] - 给Tomcat，Apache配置gzip压缩(HTTP压缩)功能背景：
HTTP 压缩可以大大提高浏览网站的速度，它的原理是，在客户端请求网页后，从服务器端将网页文件压缩，再下载到客户端，由客户端的浏览器负责解压缩并浏览。相对于普通的浏览过程HTML ,CSS,Javascript , Text ，它可以节省40%左右的流量。更为重要的是，它可以对动态生成的，包括CGI、PHP , JSP , ASP , Servlet,SHTML等输出的网页也能进行压缩，压缩效率惊人
一，对于Tomcat5.0以后的版本是支持对输出内容进行压缩的. 使用的是gzip压缩格式
下面是tomcat5.5.20 中的$tomcat_home$/conf/server.xml的原内容
1 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif < Connector port ="80" maxHttpHeaderSize ="8192"
2 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif maxThreads ="150" minSpareThreads ="25" maxSpareThreads ="75"
3 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif enableLookups ="false" redirectPort ="8443" acceptCount ="100"
4 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif connectionTimeout ="20000" disableUploadTimeout ="true" URIEncoding ="utf-8" />
5 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif <!-- Note : To disable connection timeouts, set connectionTimeout value
6 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif to 0 -->
7 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif
8 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif <!-- Note : To use gzip compression you could set the following properties :
9 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif
10 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif compression="on"
11 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif compressionMinSize="2048"
12 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif noCompressionUserAgents="gozilla, traviata"
13 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif compressableMimeType="text/html,text/xml"
14 http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif -->
从上面的第8行内容可以看出，要使用gzip压缩功能，你可以在Connector实例中加上如下属性即可
1) compression="on" 打开压缩功能
2) compressionMinSize="2048" 启用压缩的输出内容大小，这里面默认为2KB
3) noCompressionUserAgents="gozilla, traviata" 对于以下的浏览器，不启用压缩
4) compressableMimeType="text/html,text/xml" 压缩类型
我这里的配置内容为：
1http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif <Connector port="80" maxHttpHeaderSize="8192"
2http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
3http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif enableLookups="false" redirectPort="8443" acceptCount="100"
4http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif connectionTimeout="20000" disableUploadTimeout="true" URIEncoding="utf-8"
5http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif compression="on"
6http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif compressionMinSize="2048"
7http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif noCompressionUserAgents="gozilla, traviata"
8http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain" />
9http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif <!-- Note : To disable connection timeouts, set connectionTimeout value
10http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif to 0 -->
11http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif
12http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif <!-- Note : To use gzip compression you could set the following properties :
13http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif
14http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif compression="on"
15http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif compressionMinSize="2048"
16http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif noCompressionUserAgents="gozilla, traviata"
17http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif compressableMimeType="text/html,text/xml"
18http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif -->
19http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif
二，对于Apache而言，有两种情况
１）针对Apache2.0之前的版本，它原本是不支持的，不过可以通过添加第三方的module_gzip模块来启用
２）针对Apache2.0及之后的版本，Apache提供支持, 不过不叫gzip，而叫mod_deflate
下面就对Apache2.0及之后的版本作一个说明
1) 去掉#LoadModule headers_module modules/mod_headers.so前面的注释#,
2) 添加LoadModule deflate_module modules/mod_deflate.so
3) 在VirtualHost中添加
1http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif <Location "/">
2http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif SetOutputFilter DEFLATE
3http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif BrowserMatch ^Mozilla/4 gzip-only-text/html
4http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif BrowserMatch ^Mozilla/4\.0 no-gzip
5http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
6http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary
7http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif Header append Vary User-Agent env=!dont-vary
8http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif </Location>
9http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif
我这里面有一个完整的演示
1http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif# 加载deflate模块
2http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gifLoadModule headers_module modules/mod_headers.so
3http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gifLoadModule deflate_module modules/mod_deflate.so
4http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif<VirtualHost *:80>
5http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif DocumentRoot f:/apacheTest
6http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif <Location "/">
7http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif SetOutputFilter DEFLATE
8http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif BrowserMatch ^Mozilla/4 gzip-only-text/html
9http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif BrowserMatch ^Mozilla/4\.0 no-gzip
10http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
11http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary
12http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif Header append Vary User-Agent env=!dont-vary
13http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif </Location>
14http://yuleihome.iteye.com/blog/../../Images/OutliningIndicators/None.gif</VirtualHost>
出处:http://www.blogjava.net/site120/archive/2007/02/16/100073.html
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