Question

我正在尝试使用基本的Chromecast应用设置，我可以将桌面Chrome中的简单自定义消息发送到Chromecast接收器。这些设备已列入白名单，并且应用来源位于白名单过程中指定的网址。此外，正在使用正确的API_ID，接收者和发件人应用程序的NAMESPACE也是相同的。

接收器应用程序加载，但在此之后我得到：

[  0.230s] [goog.net.WebSocket] The WebSocket disconnected unexpectedly: undefined

这似乎阻止我能够向Chromecast发送自定义消息。

从发件人应用程序中，我能够找到设备，连接并启动接收器应用程序。我也可以通过发送方的stopActivity（）调用正确断开连接。

接收器的设置是：

var receiver = new cast.receiver.Receiver(APP_ID, NAMESPACE);
var channelHandler = new cast.receiver.ChannelHandler(NAMESPACE);

channelHandler.addChannelFactory(receiver.createChannelFactory(NAMESPACE));

channelHandler.addEventListener('error', function($e){
    console.log('JAC - Error!');
});

channelHandler.addEventListener('open', function($e){
    console.log('JAC - OnOpen!');
});

channelHandler.addEventListener('message', function($e){
    console.log('JAC - Message: ' + $e.type);
});


receiver.start();

Chromecast设备的完整日志是（已删除实际应用）：

[  0.027s] [cast.receiver.ChannelHandler] New channel factory added: MY-APP-ID to heartbeatChannelHandler
 cast_receiver.js:66
 [  0.088s] [cast.receiver.ChannelHandler] New channel factory added: receiverTest1: MY-APP-ID to receiverTest1
 cast_receiver.js:66
 [  0.094s] [cast.receiver.ConnectionService] Open connection service websocket: url=ws://localhost:8008/connection
 cast_receiver.js:66
 [  0.098s] [goog.net.WebSocket] Opening the WebSocket on ws://localhost:8008/connection
 cast_receiver.js:66
 [  0.104s] [cast.receiver.Receiver] Receiver started.
 cast_receiver.js:66
 [  0.142s] [goog.net.WebSocket] WebSocket opened on ws://localhost:8008/system/control
 cast_receiver.js:66
 [  0.153s] [cast.receiver.ChannelOverWebSocket] Dispatch OPEN event to ws://localhost:8008/system/control
 cast_receiver.js:66
 [  0.159s] [cast.receiver.Channel] Dispatch OPEN event to ws://localhost:8008/system/control
 cast_receiver.js:66
 [  0.164s] [cast.receiver.Platform] Platform channel is open: ws://localhost:8008/system/control
 cast_receiver.js:66
 [  0.208s] [goog.net.WebSocket] WebSocket opened on ws://localhost:8008/connection
 cast_receiver.js:66
 [  0.212s] [cast.receiver.ConnectionService] Got event: d
 cast_receiver.js:66
 [  0.222s] [goog.net.WebSocket] The WebSocket on ws://localhost:8008/connection closed.
 cast_receiver.js:66
 [  0.225s] [cast.receiver.ConnectionService] Got event: a
 cast_receiver.js:66
 [  0.230s] [goog.net.WebSocket] The WebSocket disconnected unexpectedly: undefined

对此事的任何帮助将不胜感激！谢谢！

Answer 1

NAMESPACE构造函数中Receiver的类型需要是一个数组。我猜你的代码示例中它是一个字符串。这可能会导致你看到的奇怪问题。

Chromecast Receiver App错误：WebSocket意外断开连接：未定义

1 个答案: