使用 Paho MQTT Js 成功连接到 Mosquitto 代理后突然断开连接答案

【问题标题】：sudden disconnection after succesful connection to Mosquitto broker using Paho MQTT Js使用 Paho MQTT Js 成功连接到 Mosquitto 代理后突然断开连接
【发布时间】：2020-05-01 13:00:08
【问题描述】：

我已经成功地使用 1.1.0 版本的 Paho MQTT JS 客户端连接到我的 Mosquitto 代理。但是，客户端在完成连接后立即断开连接。在使用这个版本之前，我使用的是 1.0.1 并且它工作正常。这是我涉及的主要功能的代码：

function onConnectionLost(){
        console.log("connection lost");
        document.getElementById("status").innerHTML = "Connection Lost";
        connected_flag=0;
    }

    function onFailure(message) {
        console.log("Failed");
        setTimeout(MQTTconnect, reconnectTimeout);
    }
function onConnect() {
        connected_flag=1;
        document.getElementById("status").innerHTML = "Connected";
        console.log("on Connect "+connected_flag);
        sub_topics();

    }

    function MQTTconnect(id) {
        var user = document.getElementById("user").value;
        var pass = document.getElementById("pass").value;
        //mqtt = new Paho.MQTT.Client(host,port,id);
        mqtt = new Paho.Client("wss://192.168.1.42:9873/mqtt",id);
        //document.write("connecting to "+ host);
        var options = {
            timeout: 3,
            useSSL: true,
            userName: user,
            password: pass,
            onSuccess: onConnect,
            onFailure: onFailure,

        };

        mqtt.onConnectionLost = onConnectionLost;
        mqtt.onMessageArrived = onMessageArrived;
        mqtt.onConnected = onConnected;

        mqtt.connect(options);
        return false;


    }

    function sub_topics(){

        mqtt.subscribe("es2a2/rad");
        mqtt.subscribe("e12r/temp");
        mqtt.subscribe("e92/hum");


        return false;
    }

Mosquitto 代理的日志：

1588334688: New client connected from 192.168.1.43 as 33c1olvtc78311srsavrgq53ce (p2, c1, k60, u'admin').
1588334689: Socket error on client mgqilf3dv8dktthb7u4mudlm5i, disconnecting.

编辑 1

Mosquitto.conf（使用 Mosquitto 1.6.8 版）：

pid_file /var/run/mosquitto.pid

persistence true
persistence_location /var/lib/mosquitto/

log_dest file /var/log/mosquitto/mosquitto.log

include_dir /etc/mosquitto/conf.d

per_listener_settings true

listener 9873
protocol websockets
cafile /etc/mosquitto/ca_certificates/ca.crt
keyfile /etc/mosquitto/certs/server.key
certfile /etc/mosquitto/certs/server.crt
allow_anonymous false
password_file /etc/mosquitto/passwdfile

listener 8883
cafile /etc/mosquitto/ca_certificates/ca.crt
keyfile /etc/mosquitto/certs/server.key
certfile /etc/mosquitto/certs/server.crt

【问题讨论】：

Edit 包括你的mosquitto.conf，这样我们就可以看到它是如何为 websocket 监听器设置的。还包括 mosquitto 版本信息

标签： javascript ssl websocket mqtt mosquitto

【解决方案1】：

“连接”消息之后的套接字错误几乎总是一个身份验证问题——您的密码错误、用户 ID 错误、Mosquitto 不知道您的 SSL 证书等。仔细检查所有内容，看看是否找到东西。

【讨论】：