Package multipart implements MIME multipart parsing, as defined in RFC 2046.

AddExtensionType sets the MIME type associated with the extension ext to typ.

FormatMediaType serializes mediatype t and the parameters param as a media type conforming to RFC 2045 and RFC 2616.

ParseMediaType parses a media type value and any optional parameters, per RFC 1521.

TypeByExtension returns the MIME type associated with the file extension ext.