RFC 2068:Hypertext Transfer Protocol -- HTTP/1.1
RFC-Ref

Multipurpose Internet Mail Extension


Click on the red underlined text to get to the source

... applied. Messages are passed in a format similar to that used by Internet mail as defined by the Multipurpose Internet Mail Extensions (MIME). ...


... Freed, N., and N. Borenstein, "Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies", RFC 2045draft ...
... Moore, K., "MIME (Multipurpose Internet Mail Extensions) Part Three: Message Header Extensions for Non-ASCII Text", RFC 2047draft ...


... HTTP/1.1 uses many of the constructs defined for Internet Mail (RFC 822) and the Multipurpose Internet Mail Extensions (MIME ) to allow entities to be transmitted in an open variety of representations and ...



Google
Web
RFC-Ref