Websocket连接自动关闭？ [英] Websocket connection closed automatically?

问题描述

我有以下JavaScript客户端代码：

  var connection = new WebSocket（'ws：// localhost：8080 / OmegaThings / registerdevice'）; 
 
 connection.onopen = function（）{
 console.log（Socket has open state =+ connection.readyState）; 
 connection.send（'Ping'）; //将消息'Ping'发送到服务器
 connection.send（'Websocket client'）; 
}; 
 
 console.log（Socket has open state =+ connection.readyState）; 
 connection.send（'finish'）; 
 
 //记录错误
 connection.onerror =函数（错误）{
 console.log（'WebSocket Error'+ error）; 
}; 
 
 //记录来自服务器的消息
 connection.onmessage = function（e）{
 console.log（'Server：'+ e.data）; 
}; 
  

Java端点：

  @ServerEndpoint（/ registerdevice）
 public class RegisterDeviceEndPoint 
 {
 private static final Logger LOG = Logger.getLogger（RegisterDeviceEndPoint.class.getName（））; 
 
 @OnOpen 
 public void connectionOpened（）
 {
 LOG.log（Level.INFO，************* *****连接打开**************）; 
 
 $ b @OnMessage 
 public synchronized void processMessage（Session session，String message）
 {
 LOG.log（Level.INFO，received message ：{0}，message）; 
} 
 
 @OnClose 
 public void connectionClosed（）
 {
 LOG.log（Level.INFO，connection closed）; 
} 
} 
  

我得到了以下输出：

 套接字已打开状态= 1
 InvalidStateError：尝试使用非对象，或者不再是可用的
Socket已经打开状态= 0
  

GlassFish服务器日志我得到了ping和Websocket客户端，但是在onopen事件退出（不确定）后关闭连接，因此最后一个字词finish没有出现在日志中，并且发生错误。

我想知道我的代码是否正确？

导致错误的原因是什么？ JavaScript代码，GlassFish服务器配置还是Java端点代码？

解决方案

我通过遵循本教程，无论如何，我不知道确切的问题，但它的工作..！

I'm newbie to the web-socket programming...

I have the following JavaScript client code:

var connection = new WebSocket('ws://localhost:8080/OmegaThings/registerdevice');

        connection.onopen = function () {              
            console.log("Socket has been opened state = " + connection.readyState);
            connection.send('Ping'); // Send the message 'Ping' to the server             
            connection.send('Websocket client');
        };

        console.log("Socket has been opened state = " + connection.readyState);
        connection.send('finish');

        // Log errors
        connection.onerror = function (error) {
        console.log('WebSocket Error ' + error);
        };

        // Log messages from the server
        connection.onmessage = function (e) {
        console.log('Server: ' + e.data);
        };   

Java endpoint:

@ServerEndpoint("/registerdevice") 
public class RegisterDeviceEndPoint 
{
    private static final Logger LOG = Logger.getLogger(RegisterDeviceEndPoint.class.getName());

    @OnOpen  
    public void connectionOpened() 
    {    
        LOG.log(Level.INFO, "******************connection opened**************");
    }

    @OnMessage  
    public synchronized void processMessage(Session session, String message) 
    {    
        LOG.log(Level.INFO, "received message: {0}", message);
    }

   @OnClose  
   public void connectionClosed() 
   {    
       LOG.log(Level.INFO, "connection closed");  
   }
}

on the firefox console I got the following output:

"Socket has been opened state = 1"
InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable
"Socket has been opened state = 0"

on the GlassFish server log I got "ping" and "Websocket client", but the connection closed after onopen event exit(not sure), thus, the last word "finish" doesn't appear on the log and the error occurs.

I want to know if my code is correct?
What causes the error? javascript code, GlassFish server configuration or the java endpoint code?

解决方案

I solved this problem by by following this tutorial, anyway, I don't know the exact problem, but it works..!

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