巧用htaccess设置网站的压缩与缓存

htaccess设置静态资源缓存(即浏览器缓存)，合理设置好htaccess可以有效的提高网站的访问效率。
在HTTP标头中为静态资源设置过期日期或最长存在时间，可指示浏览器从本地磁盘中加载以前下载的资源，而不是通过网络加载。这样, 网站加载速度会更快.
下面的代码都需要放到.htaccess中才能生效. 推荐设置过期时间为一个月, 即: max-age=2592000.
通过FilesMatch设置

Header set Cache-Control "max-age=2592000"

通过mod_expires.c设置

ExpiresActive On

ExpiresDefault "access plus 1 months"
ExpiresByType text/html "access plus 1 months"
ExpiresByType image/gif "access plus 1 months"
ExpiresByType image/jpeg "access plus 2 months"
ExpiresByType application/x-shockwave-flash "access plus 2 months"
ExpiresByType application/x-javascript "access plus 2 months"

如需针对具体的资源类型需要这样：

ExpiresByType image/gif "access plus 5 hours 3 minutes"

设置expires和max-age缓存兼容写法

Header set Cache-Control "max-age=604800, public"

Header set Cache-Control "max-age=18000, public, must-revalidate"

Header set Cache-Control "max-age=3600, must-revalidate"

-------------------------分割线-----------------------------------------

ExpiresActive On

    ExpiresByType image/gif A2592000
    ExpiresByType image/jpeg A2592000
    ExpiresByType image/png A2592000
    ExpiresByType application/x-shockwave-flash A2592000
    ExpiresByType text/css A2592000
    ExpiresByType application/x-javascript A2592000
    ExpiresByType application/javascript A2592000
    ExpiresByType text/javascript A2592000
    ExpiresByType text/html A600
    
    
    
    SetOutputFilter DEFLATE
    
    
    
      mod_gzip_on Yes
      mod_gzip_dechunk Yes
      mod_gzip_item_include file \.(html?|txt|css|js|php|pl)$
      mod_gzip_item_include handler ^cgi-script$
      mod_gzip_item_include mime ^text/.*
      mod_gzip_item_include mime ^application/x-javascript.*
      mod_gzip_item_exclude mime ^image/.*
      mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
    
    
    Header unset Last-Modified
    
    FileETag none