httpd常用配置：使用mod_deflate模块压缩页面优化传

适用场景

1. 节约带宽，额外消耗CPU；同时，可能有些较老浏览器不支持；
2. 压缩适于压缩的资源，例如文本文件；

设置过滤器

vim /etc/httpd/conf.d/compress.conf

SetOutputFilter DEFLATE    #名字可以自定义

# mod_deflate configuration

# Restrict compression to these MIME types
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE applicatioin/xml
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE text/javascript
AddOutputFilterByType DEFLATE text/css

# Level of compression(Highest 9 - Lowest 1)
DeflateCompressionLevel 9

#Netscape 4.x has some problems.
BrowserMatch ^Mozilla/4 gzip-only-text/html

#Netscape 4.06-4.08 have some more problems
BrowserMatch ^Mozilla/4\.0[678] no-gzip

#MSIE masquerades as Netscape but it is fine
BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html