Question

我只是在玩mqtt＆amp;＆amp;莫斯卡

我已按照以下步骤操作：

npm install -g browserify // install browserify 
cd node_modules/mqtt
npm install . // install dev dependencies 
browserify mqtt.js -s mqtt > browserMqtt.js

的index.html

<html>
  <head>
        <meta charset="utf-8" />
  </head>
  <body>
    <script src="./browserMqtt.js"></script>
      <script>
        var client = mqtt.connect({ host: 'localhost', port: 1884 }); 
        client.subscribe("presence");

        client.on("message", function(topic, payload) {
          console.log([topic, payload].join(": "));
          client.end();
        });

        client.publish("presence", "hello world!");
    </script> 
    </body>

</html>

server.js

var mosca = require('mosca')

//1883
var settings = {
  port: 1884
};

//here we start mosca
var server = new mosca.Server(settings);
server.on('ready', setup);

// fired when the mqtt server is ready
function setup() {
  console.log('Mosca server is up and running')
}

// fired whena  client is connected
server.on('clientConnected', function(client) {
  console.log('client connected', client.id);
});

// fired when a message is received
server.on('published', function(packet, client) {
  console.log('Published MIO: ', packet.payload);
});

// fired when a client subscribes to a topic
server.on('subscribed', function(topic, client) {
  console.log('subscribed : ', topic);
});

// fired when a client subscribes to a topic
server.on('unsubscribed', function(topic, client) {
  console.log('unsubscribed : ', topic);
});

// fired when a client is disconnecting
server.on('clientDisconnecting', function(client) {
  console.log('clientDisconnecting : ', client.id);
});

// fired when a client is disconnected
server.on('clientDisconnected', function(client) {
  console.log('clientDisconnected : ', client.id);
});

但如果我跑

node server

而且我去了我的index.html，我没有看到任何消息在我运行服务器的控制台窗口中。

有了这个（它完全相同），我可以看到消息

client.js

var mqtt = require('mqtt')

var client = mqtt.connect({ host: 'localhost', port: 1884 });

client.subscribe('presence');

console.log('Client publishing.. ');
client.publish('presence', 'Client 1 is alive.. Test Ping! ' + Date());

client.end();

出了什么问题？

Answer 1

此页面解释得很好：https://github.com/mcollina/mosca/wiki/MQTT-over-Websockets

查看代码，您需要允许mosca服务器处理Websockets。以下是您应该为服务器设置更改的内容。

对server.js的更新：

var settings = {
    port: 1884,
    http: {
        port: 3000,
        bundle: true,
        static: './'
    }
};

对index.html的更新：

var client = mqtt.connect({ host: 'ws://localhost', port: 3000 });

节点mosca mqtt Browserify我没有在经纪人

的index.html

server.js

client.js

1 个答案: