WebSocket Javascript客戶端未從服務器接收消息

Question

我已經在本地GlassFish 4.1服務器上部署了Java Web應用程序，該服務器實現了WebSockets與Web客戶端進行互操作。 我能夠通過套接字成功執行客戶端到服務器的通信，但是由於某些原因服務器到客戶端的通信不起作用。

將消息發送到客戶端的Java代碼：

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());
}

Javascript代碼：

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;
    }
}

即使服務器成功調用sendText（）方法，也不會觸發onMessage函數。 使用AsyncRemote會產生相同的結果。 兩端的onError偵聽器也不報告任何內容。 這是我第一次使用套接字，因此我可能缺少一些基本知識。

Answer 1

更換

PIPELINE.onMessage = pipeline_internal_onMessage

同

PIPELINE.onmessage = pipeline_internal_onMessage

請參考這里更多。