code: def _load_stream(self):
          
          meta = self._request.META
          try:
              content_length = int(
                  meta.get('CONTENT_LENGTH', meta.get('HTTP_CONTENT_LENGTH', 0))
              )
          except (ValueError, TypeError):
              content_length = 0
  
          if content_length == 0:
              self._stream = None
          elif hasattr(self._request, 'read'):
              self._stream = self._request
          else:
              self._stream = six.BytesIO(self.raw_post_data)
docs: Return the content body of the request, as a stream.