MIME 类型

MIME 类型刚开始只是用于邮件系统辨别附件的内容类型，现在广泛用于互联网中，

内容类型分为两个级别：

a type and a subtype

 

• type说明这个数据所属大类，如文本文件，图像文件，应用程序文件
• subtype说明这个数据的具体分类，

举例如下：

text/html; the type is text, and the subtype is html

 

image/gif; the type is image, and the subtype is gif

 

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所有当前支持的MIME类型可以从下面网站获得：

http://www.iana.org/assignments/media-types/.

 

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MIME 类型也充许你定义自定义的类型，保子类型必须以x-开头，如下是一些被广泛使用的自定义类型：

x-bitmap

An X Windows bitmap image.

 

x-gzip

Data compressed in the GNU gzip format.

 

x-mif

A FrameMaker MIF document.

 

x-sd

A session directory protocol announcement, used to announce MBONE events.

 

x-shar

A shell archive; the Unix equivalent of a Windows or Macintosh self-extracting archive. Software shouldn't be configured to unpack shell archives automatically, because a shell archive can call any program the user who runs it has the rights to call.

 

x-tar

A tar archive.

 

x-gtar

A GNU tar archive