code: def load(self, *args, **kwargs):
          
          response = self.http.send(self.url)
          if response.status_code == 200:
              _txt = response.content
              return self.parse_and_check_signature(_txt)
          else:
              logger.info("Response status: %s", response.status_code)
              raise SourceNotFound(self.url)
docs: Imports metadata by the use of HTTP GET.
          If the fingerprint is known the file will be checked for
          compliance before it is imported.