Tornado:动态发送websocket消息到javascript页面？

import tornado.ioloop
import tornado.web
import tornado.websocket

class WebSocketHandler(tornado.websocket.WebSocketHandler):
    def open(self):
        print("WebSocket连接已建立")

    def on_message(self, message):
        print("接收到消息：", message)
        # 在这里可以根据需要处理接收到的消息

        # 发送消息到JavaScript页面
        self.write_message("Hello from server!")

    def on_close(self):
        print("WebSocket连接已关闭")

class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.render("index.html")

def make_app():
    return tornado.web.Application([
        (r"/", MainHandler),
        (r"/websocket", WebSocketHandler),
    ])

if __name__ == "__main__":
    app = make_app()
    app.listen(8888)
    tornado.ioloop.IOLoop.current().start()