• mqtt 服务器与客户端通讯


    mqtt 服务器与客户端通讯。

    服务器端

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    /**
    * Created by niyl on 2016/1/13.
    */
     
    var mosca = require('mosca');
    var MqttServer = new mosca.Server({
    port: 8000
    });
    /**
    * 验证方法
    *
    **/
    var authenticate = function(client, username, password, callback) {
    //var authorized = (username.toString() === '18FE34F48379-DC' && password.toString() === '666666');
    var authorized = (password.toString() === '666666');
    if (authorized){
    //存储设备类型
    client.type = username.toString().split('-')[1];
    }
    callback(null, authorized);
    }
     
     
    //
     
    MqttServer.on('clientConnected', function(client){
    console.log('client connected', client.id);
    });
     
    /**
    * 监听MQTT主题消息
    **/
    MqttServer.on('published', function(packet, client) {
    var topic = packet.topic;
    // console.log('message-arrived--->','topic ='+topic+',message = '+ packet.payload.toString());
    switch(topic){
    case 'pubMsg':
    console.log('message-publish', packet.payload.toString());
    //MQTT转发主题消息
    MqttServer.publish({topic: 'other', payload: 'hello'});
    //发送消息NODEJS
    console.log('HD: ');
    //发送socket.io消息
    //io.sockets.socket(YHSocketMap.get('1000')).emit('subState', packet);
    break;
    case 'other':
    console.log('message-123', packet.payload.toString());
    break;
    case 'order':
    console.log('order', packet.payload.toString());
     
    break;
    case 'test':
    console.log('test', packet.payload.toString());
    break;
    }
     
     
    });
     
    MqttServer.on('ready', function(){
    console.log('mqtt is running...');
    //MqttServer.authenticate = authenticate;
    });



    客户端程序

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    var mqtt = require('mqtt');
     
     
    var client = mqtt.createClient(8000, 'localhost',{clientId:'1',clean:false});
    //向服务器订阅一个主题
    client.subscribe('other',{qos:1});
    client.subscribe('test',{qos:1});
    //当消息到达时
    var yy=0;
    var ww=0;
    client.on('message', function (topic, message) {
    var tt=(message.toString());
    console.log(tt);
    switch(tt)
    {
    case 'redd' :
    ww++;
    console.log(10000-ww);
    break;
    case 'hello' :
    yy++;
    console.log(yy);
    break;
    }
     
    });
    // PUBLISH-发布消息
    var num=0;
    setInterval(function (){
    client.publish('order', ' ' + (num++),{qos:1, retain: true});
    console.log("num="+num);
    }, 5000);
    setInterval(function(){
    client.publish('pubMsg', 'send ' );
    // console.log("PubMsg");
    },10000);
    setInterval(function(){
    client.publish('test', 'redd' );
    // console.log("test");
    },20000);
     
     
    var start=Date.now();
    console.log("服务端"+start);
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  • 原文地址:https://www.cnblogs.com/dpf-learn/p/6623429.html
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