原生nodejs使用websocket

1. 安装：

npm  install  ws

2. 服务端（nodejs）：

var WebSocketServer = require('ws').Server,
wss = new WebSocketServer({ port: 8080 });
wss.on('connection', function (ws) {
    console.log('client connected');
    ws.on('message', function (message) {
        console.log(message);
    });
});

3. 客户端：

<script>
 	var ws = new WebSocket("ws://localhost:8080");
    ws.onopen = function (e) {
        console.log('Connection to server opened');
        sendMessage();
    }
    function sendMessage() {
        ws.send('hello');
    }
</script>

4. 测试：