HTML中meta的功用(二)(转)

一，页面跳转

<meta http-equiv="refresh" content="10; ,URL=http://www.lvtao.net">

说明：10秒后，页面刷新，并跳转到http://www.lvtao.

二,缓存控制

<meta http-equiv="Cache-control" content="public">
<meta http-equiv="Cache-control" content="private">
<meta http-equiv="Cache-control" content="no-cache">
<meta http-equiv="Cache-control" content="no-store">
<meta http-equiv="pragma" content="no-cache">

说明:

???? public:可以被缓存在公众共享缓存
???? private:只可以被缓存在私人缓存里面
???? no-cache:不缓存
???? no-store:缓存但不存档三，页面编码设定

<meta http-equiv="Content-Type" content="text/html; charset=utf8 ">

说明：这个大家最熟悉了，因为乱码的问题，搞开发的基本上都遇到过

四，cookie

<meta http-equiv="Set-Cookie" content="userid=123456; path=/tmp/cookies; expires=Thursday, 20-May-09 00:15:00 GMT">

说明：userid=123456是要存到cookie里的数据，path是存到什么地方，expires是给cookie加上期限

五，content-disposition

<meta name="content-disposition" content="inline; filename=openinexcel.csv">

content参数：

???? filename 例子："filename" "=" value??????????????????????????????//文件名
???? creation-date 例子：":= "creation-date" "=" quoted-date-time???? //创建时间
???? modification-date 例子：":= "modification-date" "=" quoted-date-time?????? //修改时间
???? read-date 例子：" := "read-date" "=" quoted-date-time????????????//读取时间
???? size 例子：":= "size" "=" 1-number?????????????????????????????? //文件大小
???? quoted-date-time 例子：" := quoted-string conform the RFC822???? //引用时间这个东西，在上传文件，发送邮件附件等会用到

六，文件类型

<meta http-equiv="Content-Script-Type" content="text/javascript">

content参数：

???? text/plain??????????????????????//文本文件
???? text/html?????????????????????? //html文件
???? application/binary??????????????//二进制文件
???? application/postscripts???????? //不知道
???? image/gif?????????????????????? //gif图片
???? image/xbm?????????????????????? //xbm图片
???? image/jpeg??????????????????????//jpeg图片
???? audio/basic???????????????????? //basic格式视频文件
???? video/mpeg??????????????????????//mpeg格式视频文件
???? video/QuickTime???????????????? //QuickTime格式视频文件?