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这个表明将http协议转成websocket协议

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>websocket</title>
    <script>
        var socket;
        if (window.WebSocket){
            socket=new WebSocket('ws://127.0.0.1:8899/ws')
            socket.onmessage=function (ev) { //接收到消息
                var ts=document.getElementById('responseTest');
                ts.value+='
'+ev.data;
            }
            socket.onopen=function (ev) {
                var ts=document.getElementById('responseTest');
                ts.value+='连接开启';
            }
            socket.onclose=function (ev) {
                var ts=document.getElementById('responseTest');
                ts.value+='
连接关闭';
            }
        } else {
            alert('浏览器不支持websocket');
        }
        function send(message) {
            if (!window.WebSocket){
                return;
            }
            if(socket.readyState == WebSocket.OPEN){
                socket.send(message);
            }else {
                alert('连接尚未开启');
            }
        }
    </script>
</head>
<body>

<form onsubmit="return false">
    <textarea  name="message" style=" 400px;height: 200px;"></textarea>
    <input type="button" value="发送消息" onclick="send(this.form.message.value)">
    <h3>服务输出</h3>
    <textarea  id="responseTest" style=" 400px;height: 300px;"></textarea>
    <input type="button" value="清空消息" onclick="javascript:document.getElementById('responseTest').value=''">
</form>

</body>
</html>

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原文地址：https://www.cnblogs.com/dongma/p/10206006.html