websocket本地调试html

先看看本地这个静态html在浏览器里看到的页面。
image.png
<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>本地websocket测试</title>
        <meta name="robots" content="all" />
        <meta name="keywords" content="本地,websocket,测试工具" />
        <meta name="description" content="本地,websocket,测试工具" />
        <style>
            .btn-group{
                display: inline-block;
            }
        </style>
    </head>
    <body>
        <input type='text' value='ws://localhost:3000/api/ws' class="form-control" style='width:390px;display:inline'
         id='wsaddr' />
        <div class="btn-group" >
            <button type="button" class="btn btn-default" onclick='addsocket();'>连接</button>
            <button type="button" class="btn btn-default" onclick='closesocket();'>断开</button>
            <button type="button" class="btn btn-default" onclick='$("#wsaddr").val("")'>清空</button>
        </div>
        <div class="row">
            <div id="output" style="border:1px solid #ccc;height:365px;overflow: auto;margin: 20px 0;"></div>
            <input type="text" id='message' class="form-control" style='width:810px' placeholder="待发信息" onkeydown="en(event);">
            <span class="input-group-btn">
                <button class="btn btn-default" type="button" onclick="doSend();">发送</button>
            </span>
            </div>
        </div>
    </body>     
        
        <script crossorigin="anonymous" integrity="sha384-LVoNJ6yst/aLxKvxwp6s2GAabqPczfWh6xzm38S/YtjUyZ+3aTKOnD/OJVGYLZDl" src="https://lib.baomitu.com/jquery/3.5.0/jquery.min.js"></script>
        <script language="javascript" type="text/javascript">
            function formatDate(now) {
                var year = now.getFullYear();
                var month = now.getMonth() + 1;
                var date = now.getDate();
                var hour = now.getHours();
                var minute = now.getMinutes();
                var second = now.getSeconds();
                return year + "-" + (month = month < 10 ? ("0" + month) : month) + "-" + (date = date < 10 ? ("0" + date) : date) +
                    " " + (hour = hour < 10 ? ("0" + hour) : hour) + ":" + (minute = minute < 10 ? ("0" + minute) : minute) + ":" + (
                        second = second < 10 ? ("0" + second) : second);
            }
            var output;
            var websocket;
 
            function init() {
                output = document.getElementById("output");
                testWebSocket();
            }
 
            function addsocket() {
                var wsaddr = $("#wsaddr").val();
                if (wsaddr == '') {
                    alert("请填写websocket的地址");
                    return false;
                }
                StartWebSocket(wsaddr);
            }
 
            function closesocket() {
                websocket.close();
            }
 
            function StartWebSocket(wsUri) {
                websocket = new WebSocket(wsUri);
                websocket.onopen = function(evt) {
                    onOpen(evt)
                };
                websocket.onclose = function(evt) {
                    onClose(evt)
                };
                websocket.onmessage = function(evt) {
                    onMessage(evt)
                };
                websocket.onerror = function(evt) {
                    onError(evt)
                };
            }
 
            function onOpen(evt) {
                writeToScreen("<span style='color:red'>连接成功，现在你可以发送信息啦！！！</span>");
            }
 
            function onClose(evt) {
                writeToScreen("<span style='color:red'>websocket连接已断开!!!</span>");
                websocket.close();
            }
 
            function onMessage(evt) {
                writeToScreen('<span style="color:blue">服务端回应&nbsp;' + formatDate(new Date()) + '</span><br/><span class="bubble">' +
                    evt.data + '</span>');
            }
 
            function onError(evt) {
                writeToScreen('<span style="color: red;">发生错误:</span> ' + evt.data);
            }
 
            function doSend() {
                var message = $("#message").val();
                if (message == '') {
                    alert("请先填写发送信息");
                    $("#message").focus();
                    return false;
                }
                if (typeof websocket === "undefined") {
                    alert("websocket还没有连接，或者连接失败，请检测");
                    return false;
                }
                if (websocket.readyState == 3) {
                    alert("websocket已经关闭，请重新连接");
                    return false;
                }
                console.log(websocket);
                $("#message").val('');
                writeToScreen('<span style="color:green">你发送的信息&nbsp;' + formatDate(new Date()) + '</span><br/>' + message);
                websocket.send(message);
            }
 
            function writeToScreen(message) {
                var div = "<div class='newmessage'>" + message + "</div>";
                var d = $("#output");
                var d = d[0];
                var doScroll = d.scrollTop == d.scrollHeight - d.clientHeight;
                $("#output").append(div);
                if (doScroll) {
                    d.scrollTop = d.scrollHeight - d.clientHeight;
                }
            }
 
 
            function en(event) {
                var evt = evt ? evt : (window.event ? window.event : null);
                if (evt.keyCode == 13) {
                    doSend()
                }
            }
        </script>
 
</html>
最后编辑于：2020.09.19 19:23:50