前端连接websocket demo
代码如下
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Java后端WebSocket的Tomcat实现</title>
<script src="dist/js/mui.min.js"></script>
</head>
<body>
<hr />
<button onclick="openWebSocket()">打开WebSocket连接</button>
<hr />
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 type="text/javascript">
var websocket = null;
//mui.ajax('http://12.11.55.33:5789/checkcenter/socket/push/1?citys=1', {
// data: {
// citys: "深圳"
// },
// dataType: 'json', //服务器返回json格式数据
// type: 'get', //HTTP请求类型
// timeout: 10000, //超时时间设置为10秒；
// success: function(data) {
// send();
// },
// error: function(xhr, type, errorThrown) {
//
// }
//});
openWebSocket();
//打开WebSocket连接
function openWebSocket() {
//判断当前浏览器是否支持WebSocket
if ('WebSocket' in window) {
var validate = "xsfasdsqtwgdsxxxsxsfax";
websocket = new WebSocket("ws://127.0.0.1:9715/ws?pageName=homePage&validate=" + validate );
} 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>
