Created
November 19, 2018 07:12
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| from tornado.websocket import WebSocketHandler | |
| from tornado.web import Application, RequestHandler | |
| from tornado.ioloop import IOLoop | |
| HTML = """ | |
| <html> | |
| <div id="messages"></div> | |
| <script> | |
| var ws = new WebSocket("ws://localhost:8888/websocket"); | |
| ws.onopen = function() { | |
| ws.send("Hello, world"); | |
| }; | |
| ws.onmessage = function (evt) { | |
| var the_div = document.getElementById("messages"); | |
| the_div.innerHTML = evt.data + "<br>" + the_div.innerHTML; | |
| }; | |
| </script> | |
| </html> | |
| """ | |
| class MainHandler(RequestHandler): | |
| def get(self): | |
| self.write(HTML) | |
| class EchoWebSocket(WebSocketHandler): | |
| clients = [] | |
| def open(self): | |
| self.clients.append(self) | |
| print("WebSocket opened") | |
| def on_message(self, message): | |
| for client in self.clients: | |
| client.write_message("You said:" + message) | |
| def on_close(self): | |
| print("WebSocket closed") | |
| def make_app(): | |
| return Application([ | |
| (r"/websocket", EchoWebSocket), | |
| (r"/", MainHandler), | |
| ]) | |
| if __name__ == "__main__": | |
| app = make_app() | |
| app.listen(8888) | |
| IOLoop.current().start() |
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