如何在tornado中的同一个url上提供HTTP页面和websocket

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

class HTTPHandler(tornado.web.RequestHandler):
    def get(self):
        self.render("index.html")  # 渲染index.html页面

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

    def on_message(self, message):
        print("收到消息:", message)

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

app = tornado.web.Application([
    (r"/", HTTPHandler),  # 映射根URL到HTTPHandler
    (r"/websocket", WebSocketHandler),  # 映射/websocket URL到WebSocketHandler
])

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