前言
在集成mqtt到小程序的开发过程中,确实走了不少弯路,下了许许多多的示例,一步步踩坑到现在终于完美解决了小程序引入mqtt的方法。该方法原生和uniapp均适用。
1. 小程序网页配置
先登录微信公众平台,找到开发》开发管理》开发设置页面
服务器域名配置中 配置socket合法域名为,mq消息服务器的域名。然后保存退出。
2.代码集成
1.新建mqtt文件夹,下载paho-mqtt.js,把这个js放在新建的文件夹下。
下载地址https://download.csdn.net/download/qq_35921773/33237463
2.然后新建mqtt.js用来初始化自己的连接信息
把mqtt.js和paho-mqtt.js放在同级文件夹下。这样方便引入
let Paho = require('./paho-mqtt.js'); var mqtt = {}; //client对象 var client = null; //mqtt连接对象 const mqttUrl = { hostname: "xxx.cn", port:8084, path: "/mqtt" } //订阅的主题与回掉方法 var map = new Map(); /** * mqtt 连接状态 * 0:正在连接 * 1:连接成功建立 * 2:连接正在关闭 * 3:连接已经关闭 */ let connectStatus = 0; //初始化weboscket mqtt.initMqtt = () => { if (null == client) { //创建mqtt客户端 client = new Paho.Client(mqttUrl.hostname, Number(mqttUrl.port), mqttUrl.path, 'wxapp_client_'+Math.random(),); } else { //Do-nothing } client.onConnected = (reconnect, uri) => { console.log("mqtt连接成功!client:", reconnect, uri); //连接成功 connectStatus = 1; //注册全局的报警事件 } client.onConnectionLost = (responseObject) => { console.log("mqtt连接关闭!", responseObject); if (responseObject.errorCode != 0) { //异常关闭 mqtt.initMqtt(); } else { //正常关闭连接 } connectStatus = 3; } client.onMessageArrived = (message) => { //console.log("Message Recieved: [Topic: ", message.destinationName, ", Payload: ", message.payloadString, ", QoS: ", message.qos, ", Retained: ", message.retained, ", Duplicate: ", message.duplicate, "]"); let topic = message.destinationName; //console.log("map:",map); try { let msgObj = {} new Promise((resolve, reject) => {/* executor函数 */ msgObj = JSON.parse(message.payloadString); resolve(msgObj); }).catch(function (value) { console.log('JSON转化异常') return; }); if(topic.indexOf('$SYS/brokers/')>-1){ map.get('home')(topic,msgObj); }else if(topic.indexOf('/client')>-1){ map.get('device')(topic,msgObj); } } catch (err) { console.error(err); } } var options = { invocationContext: { host: mqttUrl.hostname, port: mqttUrl.port, path: mqttUrl.path, clientId: 'wxapp_client_'+Math.random(), }, //超时 timeout: 5, //心跳 keepAliveInterval: 60, //清除session,如果不清除,重连之后还能收到订阅的数据 cleanSession: true, useSSL:true, reconnect: true, onSuccess: onConnect, onFailure: onFail }; function onConnect(context) { console.log("mqtt连接成功context:", context) //连接成功 connectStatus = 1; } function onFail(context) { console.log("mqtt连接失败onFail:", context) mqtt.initMqtt(); } if (1 != connectStatus) { console.log("开始连接"); client.connect(options); //正在建立连接 connectStatus = 0; } } /** * 订阅主题 * topic:主题名称 * qos:服务质量 */ mqtt.subscribe = function(topic, qos, receiveCallback) { if (1 == mqtt.getStatus()) { client.subscribe(topic, { qos: Number(qos) }); if(topic.indexOf('$SYS/brokers/')>-1){ map.set('home',receiveCallback); }else if(topic.indexOf('/client')>-1){ map.set('device',receiveCallback); } } else { setTimeout(function() { mqtt.subscribe(topic, qos, receiveCallback); }, 1000) } } /** * 取消订阅主题 * topic:主题名称 */ mqtt.unsubscribe = function(topic) { if (1 == mqtt.getStatus()) { client.unsubscribe(topic, { onSuccess: unsubscribeSuccess, onFailure: unsubscribeFailure, invocationContext: { topic: topic } }); map.delete(topic); } else { setTimeout(function() { mqtt.unsubscribe(topic); }, 1000) } } function unsubscribeSuccess(context) { console.log("取消订阅成功Topic:", context.invocationContext.topic); } function unsubscribeFailure(context) { console.log("取消订阅成功Topic:", context.invocationContext.topic); setTimeout(function() { mqtt.unsubscribe(context.invocationContext.topic); }, 1000) } /** * 发送消息 * message:消息内容 * topic:主题 * qos:服务质量 */ mqtt.publish = function(message, topic, qos) { if (1 == mqtt.getStatus()) { var message = new Paho.Message(message); message.destinationName = topic; message.qos = Number(qos); message.retained = false; client.send(message); wx.showToast({ title: '发送成功' }) } else { wx.showToast({ title: '正在重新连接服务器,请稍后重试', icon: 'none', duration: 2000 }) setTimeout(function() { mqtt.publish(message, topic, qos); }, 1000) } } /** * 返回mqtt的连接状态 */ mqtt.getStatus = function() { return connectStatus; } /** * 关闭连接 */ mqtt.disconnect = function() { console.log("关闭mqtt连接"); if (null != client) { client.disconnect(); } else { //Do-nothing } connectStatus = 3; client = null; } mqtt.initMqtt(); export default mqtt;
3.页面使用
import mqtt from '../../common/utils/mqtt.js' //指向刚才新建的mqtt.js //onLoad初始化订阅 onLoad(option) { mqtt.subscribe('$SYS/brokers/+/clients/#', 0, this.receiveCallback); }, methods: { //收到消息后的回调 receiveCallback(){ console.log('addad') }, }
内外网切换BAT脚本
1. 切换内网脚本
BAT脚本设置IP、子网掩码、网关、DNS文章来源:https://www.toymoban.com/news/detail-729148.html
@echo off cls color 0A Echo ******************************************************************************* Echo 正在修改IP地址和DNS服务器地址,请耐心等待………… Echo ******************************************************************************* cmd /c netsh interface ip set address name="以太网" source=static addr=27.195.110.187 mask=255.255.255.0 gateway=27.195.110.254 gwmetric=1 cmd /c netsh interface ip set dns "以太网" static 26.195.232.1 primary ipconfig /all Echo ******************************************************************************* Echo OK!!已修改成功!请按任意键继续………… Echo *******************************************************************************
2. 切换外网脚本(IP自动获取)
@echo off cls color 0A Echo ******************************************************************************* Echo 正在修改IP地址和DNS服务器地址,请耐心等待………… Echo ******************************************************************************* netsh interface ip set address name="以太网 4" source=dhcp netsh interface ip delete dns "以太网 4" all ipconfig /flushdns ipconfig /all Echo ******************************************************************************* Echo OK!!已修改成功!请按任意键继续………… Echo *******************************************************************************
文章来源地址https://www.toymoban.com/news/detail-729148.html
到了这里,关于微信小程序集成和使用mqtt(同时支持uniapp和原生)的文章就介绍完了。如果您还想了解更多内容,请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章,希望大家以后多多支持TOY模板网!