client.py 文件源码

def _do_retrieve_scopes(self, http_request, token):
        """Retrieves the list of authorized scopes from the OAuth2 provider.

        Args:
            http_request: callable, a callable that matches the method
                          signature of httplib2.Http.request, used to make the
                          refresh request.
            token: A string used as the token to identify the credentials to
                   the provider.

        Raises:
            Error: When refresh fails, indicating the the access token is
                   invalid.
        """
        logger.info('Refreshing scopes')
        query_params = {'access_token': token, 'fields': 'scope'}
        token_info_uri = _update_query_params(self.token_info_uri,
                                              query_params)
        resp, content = http_request(token_info_uri)
        content = _from_bytes(content)
        if resp.status == http_client.OK:
            d = json.loads(content)
            self.scopes = set(util.string_to_scopes(d.get('scope', '')))
        else:
            error_msg = 'Invalid response %s.' % (resp.status,)
            try:
                d = json.loads(content)
                if 'error_description' in d:
                    error_msg = d['error_description']
            except (TypeError, ValueError):
                pass
            raise Error(error_msg)