[写在前面]
官网:https://github.com/mqttjs/MQTT.js
...等等再写...
[版本明细]
"vue": "2.6.10",
"vue-router": "3.0.6",
"vuex": "3.1.0"
"mqtt": "^5.8.1",
"crypto-js": "^4.2.0",
"electron": "^13.6.9",
"electron-devtools-installer": "^3.1.0",
[vue.config.js]
mqtt内部使用 ES6+ 的语法,使用过程中可能存在无法解析的情况,导致项目启动报错,需要在‘vue.config.js’中增加配置 transpileDependencies: ["mqtt"]
Ps. transpileDependencies 是一个Vue CLI 的配置选项,用于制定需要被转译的依赖包。在Vue项目中,有些依赖包可能是用了ES6+的语法,而一些低版本的浏览器不支持这些语法,因此需要将这些依赖包转译成ES5语法,以便在低版本浏览器中正常运行。
[接口数据]
- getMqttConnectInfo
返回值:
data: {
host: "mqtt.xxxx.net", // "mqtt域名",
port: 8084, // "mqtt端口",
secretKey: "mmmmmmm", //"mqtt密钥,mqtt密码 = md5(clientId,secretKey) ",
timestamp: 1758796, // "mqtt服务器时间戳",
token: "tokentokentoke token", //"clientid = token|sighmethod=md5,timestamp=nowdate ",
topic: "/message/yyyy", //"订阅主题",
username: "username", //"mqtt用户名",
},
[开始啦]
mqtt.js:
import mqtt from "mqtt";
import crypto from "crypto-js";
class MQTT {
url = ""; // mqtt地址
topic = ""; //
token = ""; //
secretKey = "";
username = "";
password = ""; //密码
// 初始化类实例
constructor(params) {
console.log("mqtt实例", params);
this.topic = params.topic; // 订阅的topic
this.token = params.token;
this.secretKey = params.secretKey;
this.url = params.url;
this.username = params.username;
this.password = params.password;
}
//初始化mqtt
init(config) {
const connectUrl = this.url || "wss://mqtt.djcps.com:8084/mqtt";
const token = this.token; //token
const username = this.username; // 用户名
const secretKey = this.secretKey; //密钥
//生成clientid (注意时间戳使用当前时间的,不要使用后端返回的,会导致密码失败)
var clientId = token + "|" + "signmethod=hmacmd5,timestamp=" + Date.now();
//生成password (这里使用HmacMD5加密, 没有使用普通的md5)
var password = crypto.HmacMD5(clientId, secretKey).toString();
const options = {
clean: true,
protocolVersion: 4,
protocolId: "MQTT",
rejectUnauthorized: false,
connectTimeout: config.connectTimeout,
reconnectPeriod: config.reconnectPeriod,
clientId: clientId,
username: username,
password: password,
keepalive: 60,
// 其他
// protocol: "ws",
// host: this.url,
// ws: 8084,
// wss: 8084,
// port: 8008,
// endpoint: "/mqtt",
};
// const connectUrl = `${options.protocol}://${options.host}:${options.port}${options.endpoint}`;
// 使用地址链接
this.client = mqtt.connect(connectUrl, options);
// 消息处理
this.client.on("message", (topic, message) => {
let mqData = JSON.parse(message.toString());
console.log("收到消息", topic, message, mqData);
//接收消息
if (config.messageCallback) {
config.messageCallback(topic, mqData);
}
});
// 重连处理
this.client.on("reconnect", (error) => {
console.log("正在重连:", error);
});
// 链接失败
this.client.on("error", (error) => {
console.log("链接失败", error);
});
}
//取消订阅
unsubscribes() {
this.client.unsubscribe(this.topic, (error) => {
if (!error) {
console.log("取消订阅成功");
} else {
// console.log('取消订阅失败');
}
});
}
//连接
link() {
this.client.on("connect", (con) => {
let qosValue = this.qos;
this.client.subscribe(this.topic, { qosValue }, (error, res) => {
if (!error) {
console.log("订阅成功");
} else {
console.log("订阅失败");
}
});
});
}
// // 发送信息
// SendMessage(topic, sendMsg) {
// let options = this.qos;
// this.client.publish(
// "rscu/sensor/exterior/up/id",
// sendMsg,
// options,
// (err, a) => {
// if (!err) {
// console.log("发送信息成功");
// // this.$message.success("发送信息成功");
// } else {
// console.log("发送信息失败");
// }
// }
// );
// }
// //收到的消息
// get(callback) {
// this.client.on("message", callback);
// }
//结束链接
over() {
this.client.end();
console.log("结束链接");
}
}
export default MQTT;
使用:
import MQTT from "./mqtt";
created() {
this.startMqtt();
this.scanner = new Scanner();
console.log(this.scanner);
this.scanner.listener(this.scannerAdd);
},
destroyed() {
this.endMqtt();
this.PublicMqtt = null;
this.scanner.end();
},
methods: {
// 连接mqtt
startMqtt() {
const _machineInfo = JSON.parse(localStorage.getItem("machineInfo"));
Api.get_mqttConnectInfoNoAuth(_machineInfo.deviceId)
.then((res) => {
console.log("请求token", res);
if (res.success) {
const mqttConfig = res.data;
mqttConfig.url =
"wss://" + mqttConfig.host + ":" + mqttConfig.port + "/mqtt";
//设置订阅地址
this.PublicMqtt = new MQTT(mqttConfig);
//初始化mqtt
this.PublicMqtt.init({
reconnectPeriod: 5000, //重连时间间隔
connectTimeout: 5000,
messageCallback: this.getMqttMessage, // 接收消息
});
//链接mqtt
this.PublicMqtt.link();
} else {
console.log("未连接芯片");
}
})
.catch((err) => {
console.log(err);
})
.finally(() => {});
},
getMqttMessage(topic, message) {
console.log("接收到消息", topic, message);
},
// 断开链接
endMqtt() {
if (this.PublicMqtt) {
this.PublicMqtt.unsubscribes();
this.PublicMqtt.over();
}
},
// 发送信息 监测有没有链接 没有弹框
// send(topic, message) {
// console.log("send方法被触发", topic, message);
// if (this.PublicMqtt) {
// let mqttPayload = JSON.parse(message);
// mqttPayload.dynamicType = "";
// message = JSON.stringify(mqttPayload);
// this.PublicMqtt.SendMessage(topic, message);
// } else {
// this.$message.error("尚未连接");
// }
// },
}
其他
- 加密方式有 js-md5 ts-md5 crypto.HmacMD5,这里使用最后一个
//js使用
var key = md5('hello');
console.log("加密后:"key) //加密后:5d41402abc4b2a76b9719d911017c592
//ts使用
var key = Md5.hashStr('hello');
console.log("加密后:"key) //加密后:5d41402abc4b2a76b9719d911017c592
crypto.HmacMD5(clientId, secretKey).toString();
- 获取到mqtt消息之后,需要通过 JSON.parse 进行处理,直接打印消息无法获取
let mqData = JSON.parse(message.toString());
- 如果有如下报错, 可能是生成密钥的时候,时间戳不是当前时间戳导致的
mqtt Connection refused: Bad username or password