websocket.py 文件源码

def write_message(self, message, binary=False):
        """Sends the given message to the client of this Web Socket.

        The message may be either a string or a dict (which will be
        encoded as json).  If the ``binary`` argument is false, the
        message will be sent as utf8; in binary mode any byte string
        is allowed.

        If the connection is already closed, raises `WebSocketClosedError`.

        .. versionchanged:: 3.2
           `WebSocketClosedError` was added (previously a closed connection
           would raise an `AttributeError`)

        .. versionchanged:: 4.3
           Returns a `.Future` which can be used for flow control.
        """
        if self.ws_connection is None:
            raise WebSocketClosedError()
        if isinstance(message, dict):
            message = tornado.escape.json_encode(message)
        return self.ws_connection.write_message(message, binary=binary)