def _do_request(self, method, path, data=None, params=None, action=None): content_type = 'application/json' body = None if data is not None: # empty dict is valid body = wsgi.Serializer().serialize(data, content_type) req = testlib_api.create_request( path, body, content_type, method, query_string=params) res = req.get_response(self._api) if res.status_code >= 400: raise webexc.HTTPClientError(detail=res.body, code=res.status_code) if res.status_code != webexc.HTTPNoContent.code: return res.json