基于jQuery的web前端mqtt消息监听和消息发送

最近做了一个项目，用到了mqtt，觉得特别好用，可以把消息直接推送到web端，手机端等不同的终端，太方便了，于是专门写了个简单的demo，代码比较简单，但是包括了mqtt消息的发送和监听，我用的是jQuery来实现的，所以引用了mqttws31.js这个文件，该文件一并放到源码里面，大家可以下载。

源代码下载地址：基于jQuery的mqtt消息监听Demo-Web开发文档类资源-优快云下载最近做了一个项目，用到了mqtt，觉得特别好用，可以把消息直接推送到web端，手机端等不同的终端，太更多下载资源、学习资料请访问优快云下载频道.https://download.youkuaiyun.com/download/yang_computer/74972666

<html>
    <head>
        <title>基于jQuery的mqtt消息监听</title>
        <script src="js/jquery-1.8.3.min.js"></script>
        <script src="js/mqttws31.js"></script>
        <script>
        $().ready(function(){
            MQTTconnect();

            $("#sendMsg").click(function(){
                sendMessageToMqtt($("#msg").val());
                $("#msg").val("");
            });
            
        });

        var hostname="**************";//mqtt服务器主机地址
        var hostPort="***";//mqtt服务器端口号
        var sub_count = 0;
        var client;
        var timeout = 5;
        var keepAlive = 100;
        var clientId = guid();
        function MQTTconnect() {
            client = new Paho.MQTT.Client(hostname, hostPort, clientId);
            client.onMessageArrived = onMessageArrived;
            var options = {
                invocationContext: {
                    host: hostname,
                    port: hostPort,
                    path: "/mqtt",
                    clientId: clientId
                },
                timeout: timeout,
                keepAliveInterval: keepAlive,
                cleanSession: false,
                useSSL: false,
                // userName: userName,  
                // password: password,  
                onSuccess: onConnect,
                onFailure: function (e) {
                    alert("连接失败");
                }
            };
            client.connect(options);
        };

        function onConnect() {
            client.subscribe("test/msg");    //订阅主题
        }

        //发送消息
        function sendMessageToMqtt(msg)
        {
            var message = new Paho.MQTT.Message(msg);
            message.destinationName = "test/msg";
            message.qos=0;
            client.send(message);
        }

        //收到消息后的处理函数
        function onMessageArrived(message) {
            var topic = message.destinationName;
            var payload = message.payloadString;
            $("#reciveMsg").append($("<div>"+payload+"</div>"));
        }

        //生成随机的clientid
        function S4() {
            return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
        };
        function guid() {
            return (S4() + S4() + "-" + S4() + "-" + S4() + "-" + S4() + "-" + S4() + S4() + S4());
        };
        </script>
    </head>
    <body>
        <div><input type="text" id="msg" style="width: 100%;"></div>
        <div style="margin-top: 5px;"><input type="button" id="sendMsg" value="发送消息"></div>
        <div style="margin-top: 20px;">
            <div>收到的消息：</div>
            <div id="reciveMsg"></div>
        </div>
    </body>
</html>