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- <!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>
- Welcome<br/><input id="text" type="text"/>
- <button onclick="send()">发送消息</button>
- <hr/>
- <button onclick="closeWebSocket()">关闭WebSocket连接</button>
- <hr/>
- <div id="message"></div>
- </body>
- <script>
- var websocket = null;
- //判断当前浏览器是否支持WebSocket
- if ('WebSocket' in window) {
- websocket = new WebSocket("ws://localhost:8080/wsServer");
- }
- else {
- alert('当前浏览器 Not support websocket')
- }
-
- //连接发生错误的回调方法
- websocket.onerror = function () {
- setMessageInnerHTML("WebSocket连接发生错误");
- };
-
- //连接成功建立的回调方法
- websocket.onopen = function () {
- setMessageInnerHTML("WebSocket连接成功");
- }
-
- //接收到消息的回调方法
- websocket.onmessage = function (event) {
- setMessageInnerHTML(event.data);
- }
-
- //连接关闭的回调方法
- websocket.onclose = function () {
- setMessageInnerHTML("WebSocket连接关闭");
- }
-
- //监听窗口关闭事件,当窗口关闭时,主动去关闭websocket连接,防止连接还没断开就关闭窗口,server端会抛异常。
- window.onbeforeunload = function () {
- closeWebSocket();
- }
-
- //将消息显示在网页上
- function setMessageInnerHTML(innerHTML) {
- document.getElementById('message').innerHTML += innerHTML + '<br/>';
- }
-
- //关闭WebSocket连接
- function closeWebSocket() {
- websocket.close();
- }
-
- //发送消息
- function send() {
- var message = document.getElementById('text').value;
- websocket.send(message);
- }
- </script>
-
- </html>
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