gnosis23/index.html

## index.html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
  <h1>Hello world</h1>
  <script>
    // Create WebSocket connection.
    const socketUrl = new URL('updates', window.location);
    socketUrl.protocol = 'ws';

    const socket = new WebSocket(socketUrl.href);

    // Connection opened
    socket.addEventListener('open', function (event) {
        socket.send('Hello Server!');
    });

    // Listen for messages
    socket.addEventListener('message', function (event) {
        console.log('Message from server ', event.data);
    });

    setTimeout(() => {
      socket.send("4008123123");
    }, 5000);
  </script>
</body>
</html>

## server.js
const WebSocketServer = require('ws').Server;
const express = require('express');
const http = require('http');
const path = require('path');

class Server {
  constructor(port) {
    this._app = express();
    this._port = port;

    this._appServer = http.createServer(this._app);

    // external web server
    this._wss = new WebSocketServer({
      server: this._appServer,
      path: '/updates'
    });

    this._wss.on('connection', (ws) => {
      ws.on('message', function incoming(message) {
        console.log('received: %s', message);
        ws.send(`received: ${message}`);
      });

      ws.send('something');
    });

    // this._app.use(express.static('../public'));
    this._app.get('/', (req, res) => {
      res.sendFile(path.resolve(__dirname, '../public/index.html'));
    });
  }

  listen() {
    this._appServer.listen(this._port, () => {
      console.log('listening on port ' + this._port);
    })
  }
}

module.exports = Server;
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title>Document</title>
	</head>
	<body>
	<h1>Hello world</h1>
	<script>
	// Create WebSocket connection.
	const socketUrl = new URL('updates', window.location);
	socketUrl.protocol = 'ws';

	const socket = new WebSocket(socketUrl.href);

	// Connection opened
	socket.addEventListener('open', function (event) {
	socket.send('Hello Server!');
	});

	// Listen for messages
	socket.addEventListener('message', function (event) {
	console.log('Message from server ', event.data);
	});

	setTimeout(() => {
	socket.send("4008123123");
	}, 5000);
	</script>
	</body>
	</html>
	const WebSocketServer = require('ws').Server;
	const express = require('express');
	const http = require('http');
	const path = require('path');

	class Server {
	constructor(port) {
	this._app = express();
	this._port = port;

	this._appServer = http.createServer(this._app);

	// external web server
	this._wss = new WebSocketServer({
	server: this._appServer,
	path: '/updates'
	});

	this._wss.on('connection', (ws) => {
	ws.on('message', function incoming(message) {
	console.log('received: %s', message);
	ws.send(`received: ${message}`);
	});

	ws.send('something');
	});

	// this._app.use(express.static('../public'));
	this._app.get('/', (req, res) => {
	res.sendFile(path.resolve(__dirname, '../public/index.html'));
	});
	}

	listen() {
	this._appServer.listen(this._port, () => {
	console.log('listening on port ' + this._port);
	})
	}
	}

	module.exports = Server;