我正在尝试基于websocket的简单MQTT客户端,并且在Chrome控制台上出现"Uncaught ReferenceError:Messaging is defined defined"错误.

  
  


  
 


  
Example Web Messaging web page.
  
  

  
 Connect 
    Make a connection to the server, and set up a call back used if a 
    message arrives for this client.
    

    
    
  

  

  
 Subscribe 
  Make a subscription to topic "/World".
  
 
  

  

  
 Send 
    Create a Message object containing the word "Hello" and then publish it at
    the server.
    

    
  

  

  
 Receive 
    A copy of the published Message is received in the callback we created earlier.
  
  

  

  
 Disconnect 
    Now disconnect this client from the server.
  
 
  
  

ERROR在线"var client = new Messaging.Client(wsbroker,wsport,"

错误操作系统"未捕获的ReferenceError:未定义消息"

java脚本来自http://git.eclipse.org/c/paho/org.eclipse.paho.mqtt.Javascript.git/tree/src/mqttws31.js

请建议任何解决方案......

您正在使用一个旧示例,包名已更改它不再是Messaging应该是:

...
var client = new Paho.MQTT.Client(wsbroker, wsport,
    "myclientid_" + parseInt(Math.random() * 100, 10));
...

编辑:test.mosquitto.org的端口号也是8080而不是80