关于MIME的那点事

firefox关于MIME的介绍

https://developer.mozilla.org/en/how_mozilla_determines_mime_types

我们要重点关注一下MIME探测。

我们注意这句话

Any HTTP/1.1 message containing an entity-body SHOULD include a Content-Type header field defining the media type of that body. If and only if the media type is not given by a Content-Type field, the recipient MAY attempt to guess the media type via inspection of its content and/or the name extension(s) of the URI used to identify the resource.

不过我们还是需要探测，即使给了Content-Type

这里讲解的更加详细

我们看看IE 的MIME 探测

http://netsecurity.51cto.com/art/200902/112190.htm