使用js连接mqtt
描述:使用javascript连接mqtt
代码:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>ehz-app</title>
</head>
<body>
<div id="app">
{{ message }}
</div>
<!-- built files will be auto injected -->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/paho-mqtt/1.0.1/mqttws31.min.js" type="text/javascript"></script>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
message: 'connect to mqtt'
}
});
var hostname = '10.10.14.235', //'192.168.1.2',
port = 8083,
clientId = 'test',
timeout = 5,
keepAlive = 100,
cleanSession = false,
ssl = false,
// userName = 'test',
// password = 'test',
topic = '/helloMQTT';
client = new Paho.MQTT.Client(hostname, port, clientId); //创建mqtt客户端
//建立客户端实例
var options = {
invocationContext: {
host: hostname,
port: port,
path: client.path,
clientId: clientId
},
timeout: timeout,
keepAliveInterval: keepAlive,
cleanSession: cleanSession,
useSSL: ssl,
// userName: userName,
// password: password,
onSuccess: onConnect,
onFailure: function (e) {
console.log(e);
s = "{time:" + new Date().Format("yyyy-MM-dd hh:mm:ss") + ", onFailure()}";
console.log(s);
}
};
client.connect(options);
//连接服务器并注册连接成功处理事件
function onConnect() {
console.log("onConnected");
s = "{time:" + new Date().Format("yyyy-MM-dd hh:mm:ss") + ", onConnected()}";
console.log(s);
client.subscribe(topic);
}
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) {
console.log(responseObject);
s = "{time:" + new Date().Format("yyyy-MM-dd hh:mm:ss") + ", onConnectionLost()}";
console.log(s);
if (responseObject.errorCode !== 0) {
console.log("onConnectionLost:" + responseObject.errorMessage);
console.log("连接已断开");
}
}
function onMessageArrived(message) {
s = "{time:" + new Date().Format("yyyy-MM-dd hh:mm:ss") + ", onMessageArrived()}";
console.log(s);
console.log("收到消息:" + message.payloadString);
}
function send() {
var s = document.getElementById("msg").value;
if (s) {
s = "{time:" + new Date().Format("yyyy-MM-dd hh:mm:ss") + ", content:" + (s) + ", from: web console}";
message = new Paho.MQTT.Message(s);
message.destinationName = topic;
client.send(message);
document.getElementById("msg").value = "";
}
}
var count = 0;
function start() {
window.tester = window.setInterval(function () {
if (client.isConnected) {
var s = "{time:" + new Date().Format("yyyy-MM-dd hh:mm:ss") + ", content:" + (count++) +
", from: web console}";
message = new Paho.MQTT.Message(s);
message.destinationName = topic;
client.send(message);
}
}, 1000);
}
start(); //定时发送测试消息
function stop() {
window.clearInterval(window.tester);
}
Date.prototype.Format = function (fmt) { //author: meizz
var o = {
"M+": this.getMonth() + 1, //月份
"d+": this.getDate(), //日
"h+": this.getHours(), //小时
"m+": this.getMinutes(), //分
"s+": this.getSeconds(), //秒
"q+": Math.floor((this.getMonth() + 3) / 3), //季度
"S": this.getMilliseconds() //毫秒
};
if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
for (var k in o)
if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[
k]) : (("00" + o[k]).substr(("" + o[k]).length)));
return fmt;
}
</script>
</body>
</html>
执行结果: