fields is a sequence of (name, value) elements for regular form fields.
files is a sequence of (name, filename, value) elements for data to be uploaded as files
Return (content_type, body) ready for httplib.HTTP instance
Try to guess content-type of a file.
Returns a MIME type as string.
If none can be determined, application/octet-stram is returned.
Post fields and files to an http host as multipart/form-data.
fields is a sequence of (name, value) elements for regular form fields.
files is a sequence of (name, filename, value) elements for data to be uploaded as files
Return the server’s response page.