我在cloudMQTT创建了mqtt代理,这是我得到的有关端口和服务器的信息
现在,我编写了该代码以运行连接到该代理并发送世界问候的网页。
<html>
<head>
<title>JavaScript MQTT WebSocket Example</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/paho-mqtt/1.0.1/mqttws31.js" type="text/javascript">
</script>
<script type = "text/javascript" language = "javascript">
var mqtt;
var reconnectTimeout = 2000;
var host="m23.cloudmqtt.com"; //change this
var port= 38788;
function onConnect() {
// Once a connection has been made, make a subscription and send a message.
console.log("Connected ");
//mqtt.subscribe("sensor1");
message = new Paho.MQTT.Message("Hello world");
message.destinationName = "orange1";
mqtt.send(message);
}
function MQTTconnect() {
console.log("connecting to "+ host +" "+ port);
mqtt = new Paho.MQTT.Client(host,port,"clientjs");
//document.write("connecting to "+ host);
var options = {
timeout: 3,
onSuccess: onConnect,
};
mqtt.connect(options); //connect
}
</script>
</head>
<body>
<h1>Main Body</h1>
<script>
MQTTconnect();
</script>
</body>
</html>
每次我打开该页面并打开console.js时,我都会收到该问题消息:
(这是出现在我的console.log上的错误列表,以帮助任何可以看到图像的人。)WebSocket连接到'ws://m23.cloudmqtt.com:38788 / mqtt'失败:WebSocket握手时出错:net: :ERR_CONNECTION_RESET mqttws31.js:979
Paho.MQTT.ClientImpl._doConnect @ mqttws31.js:979
Paho.MQTT.ClientImpl.connect @ mqttws31.js:849
Client.connect @ mqttws31.js:1799
MQTTconnect @ websockets-1.htm:31
(匿名)@ websockets-1.htm:39
WebSocket与'ws://m23.cloudmqtt.com:38788 / mqtt'的连接失败:WebSocket握手期间出错:net :: ERR_CONNECTION_RESET mqttws31.js:977
Paho.MQTT.ClientImpl._doConnect @ mqttws31.js:977
Paho.MQTT.ClientImpl._disconnected @ mqttws31.js:1459
Paho.MQTT.ClientImpl._on_socket_error @ mqttws31.js:1347
(匿名)@ mqttws31.js:157
我试图更改端口,但我遇到了同样的问题。我该如何解决类似的问题?如果我尝试连接到https://test.mosquitto.org/,我会遇到同样的问题吗?怎么也可以解决?
您需要设置标志以启用SSL(如端口图片所示,Websockets需要TLS)
var options = {
timeout: 3,
onSuccess: onConnect,
useSSL: true
};
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