utils.py 文件源码

def _get_response(self, full_url, headers, timeout):
        try:
            response = self._session.get(full_url, headers=headers,
                                         timeout=timeout)
            if response.status_code != 200:
                raise MetadataRetrievalError(
                    error_msg="Received non 200 response (%s) from ECS metadata: %s"
                    % (response.status_code, response.text))
            try:
                return json.loads(response.text)
            except ValueError:
                raise MetadataRetrievalError(
                    error_msg=("Unable to parse JSON returned from "
                               "ECS metadata: %s" % response.text))
        except RETRYABLE_HTTP_ERRORS as e:
            error_msg = ("Received error when attempting to retrieve "
                         "ECS metadata: %s" % e)
            raise MetadataRetrievalError(error_msg=error_msg)