gce.py 文件源码

def _refresh(self, http_request):
        """Refreshes the access_token.

        Skip all the storage hoops and just refresh using the API.

        Args:
            http_request: callable, a callable that matches the method
                          signature of httplib2.Http.request, used to make
                          the refresh request.

        Raises:
            HttpAccessTokenRefreshError: When the refresh fails.
        """
        try:
            self._retrieve_info(http_request)
            self.access_token, self.token_expiry = _metadata.get_token(
                http_request, service_account=self.service_account_email)
        except httplib2.HttpLib2Error as e:
            raise HttpAccessTokenRefreshError(str(e))