WebSocket Javascript客户端未收到来自服务器的消息

Question

我已经在本地GlassFish 4.1服务器上部署了Java Web应用程序，该服务器实现了与Web客户端互操作的WebSockets。我能够通过套接字成功执行客户端到服务器的通信，但由于某种原因，服务器到客户端的通信不起作用。

将消息发送到客户端的Java代码：

try 
{ 
    String msg = ServerClientInteropManager.toResponseJSON(response); 
    parentSession.getBasicRemote().sendText(msg); 
    FLAIRLogger.get().info("Sent response to client. Message: " + msg); 
} 
catch (IOException ex) { 
    FLAIRLogger.get().error("Couldn't send message to session " + parentSession.getid() + ". Exception - " + ex.getMessage()); 
} 

的JavaScript代码：

pipeline_internal_onMessage = function(event) 
{ 
    var msg = JSON.parse(event.data); 
    console.log("Received message from server. Data: " + event.data); 
}; 

function pipeline_init() 
{ 
    if (PIPELINE !== null || PIPELINE_CONNECTED === true) 
    { 
     console.log("Pipline already initialized"); 
     return false; 
    } 
    else 
    { 
     var pipelineURI = "ws://" + document.location.host + document.location.pathname + "webranker"; 
     console.log("Attempting to establish connection with WebSocket @ " + pipelineURI); 

     if ('WebSocket' in window) 
      PIPELINE = new WebSocket(pipelineURI); 
     else if ('MozWebSocket' in window) 
      PIPELINE = new MozWebSocket(pipelineURI); 
     else 
     { 
      console.log("FATAL: No WebSockets support"); 
      alert("This browser does not support WebSockets. Please upgrade to a newer version or switch to a browser that supports WebSockets."); 
      return false; 
     } 

     // the other event listeners get added here 
     PIPELINE.onMessage = pipeline_internal_onMessage; 
     PIPELINE_CONNECTED = true; 

     window.onbeforeunload = function() { 
      pipeline_deinit(); 
     }; 

     console.log("Pipeline initialized"); 
     return true; 
    } 
} 

在onMessage功能从来没有发射，即使在服务器成功调用sendText（）方法。使用AsyncRemote产生相同的结果。两端的onError侦听器也不会报告任何内容。这是我第一次使用套接字，所以我可能会错过一些基本的东西。

Answer 1

更换

PIPELINE.onMessage = pipeline_internal_onMessage 

与

PIPELINE.onmessage = pipeline_internal_onMessage 

请参考here更多。