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通过网页连接MQTT服务器

2021-02-27 09:36:32 作者：互联网

<!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>
    <script src="https://cdn.bootcss.com/paho-mqtt/1.0.2/mqttws31.min.js"></script>
    <script>
        client = new Paho.MQTT.Client("broker.emqx.io", Number(8083), "websockets-test");//建立客户端实例
        client.connect({onSuccess:onConnect});//连接服务器并注册连接成功处理事件
            function onConnect() {
                console.log("onConnected");
                topic = 'mytopic'; //订阅的主题
                client.subscribe(topic);//订阅主题
                console.log("subscribed");
                //发送消息
            }
            client.onConnectionLost = onConnectionLost;//注册连接断开处理事件
            client.onMessageArrived = onMessageArrived;//注册消息接收处理事件
            function onConnectionLost(responseObject) {
                if (responseObject.errorCode !== 0) {
                    // console.log("onConnectionLost:"+responseObject.errorMessage);
                    console.log("连接已断开");
                 }
            }
            function onMessageArrived(message) {
                console.log("收到消息:"+message.payloadString);
                console.log("主题："+message.destinationName);

            }
    </script>
</body>
</html>

标签：网页,log,处理事件,console,MQTT,client,onConnectionLost,服务器,message
来源： https://www.cnblogs.com/codeit/p/14454752.html