我已經(jīng)在本地GlassFish 4.1服務(wù)器上部署了Java Web應(yīng)用程序，該服務(wù)器實(shí)現(xiàn)了與Web客戶端互操作的WebSockets。我能夠通過套接字成功執(zhí)行客戶端到服務(wù)器的通信，但由于某種原因，服務(wù)器到客戶端的通信不起作用。WebSocket Javascript客戶端未收到來自服務(wù)器的消息

將消息發(fā)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());

}

的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;

}

}

在onMessage功能從來沒有發(fā)射，即使在服務(wù)器成功調(diào)用sendText()方法。使用AsyncRemote產(chǎn)生相同的結(jié)果。兩端的onError偵聽器也不會(huì)報(bào)告任何內(nèi)容。這是我第一次使用套接字，所以我可能會(huì)錯(cuò)過一些基本的東西。

2016-03-05

shadeMe

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