Method ping

aiohttp/web_ws.py:122–127

(self, message='b')

        return self._exception

    def ping(self, message='b'):
        if self._writer is None:
            raise RuntimeError('Call .prepare() first')
        if self._closed:
            raise RuntimeError('websocket connection is closing')
        self._writer.ping(message)

    def pong(self, message='b'):
        # unsolicited pong