Multipart_form.HeaderSourceAny part of a multipart/form-data document has a HTTP header which describes:
We allow the user to introspect the given header with useful functions.
content_type header returns the Content_type value of header. If this value does not exists, it return default value.
content_encoding returns the Content_encoding value of header. If this value does not exists, it return default value.
content_disposition returns the Content_disposition value of header if it exists.