code: def get_content_type(self):
          
          mime_type, encoding = mimetypes.guess_type(self.filepath)
          if encoding == "gzip":
              return "application/gzip"
          elif encoding is not None:
              return "application/octet-stream"
          elif mime_type is not None:
              return mime_type
          # if mime_type not detected, use application/octet-stream
          else:
              return "application/octet-stream"
docs: Returns the ``Content-Type`` header to be used for this request.