嗯，所以我认为不是作为一个数组传递NAMESPACE，[ NAMESPACE]也是我的问题（see this stack overflow），但即使确保Receiver构造函数采用了一个NAMESPACE数组它似乎不起作用。 @dowski会喜欢你的帮助。这是我的javascript控制台输出：
[ 0.102s] [cast.receiver.ChannelHandler] New channel factory added: YouTube to heartbeatChannelHandler
cast_receiver.js:55
[ 0.108s] [cast.receiver.ChannelHandler] New channel factory added: com.google.chromecast.umano:YouTube to com.google.chromecast.umano
cast_receiver.js:55
[ 0.109s] [cast.receiver.ConnectionService] Open connection service websocket: url=ws://localhost:8008/connection
cast_receiver.js:55
[ 0.110s] [goog.net.WebSocket] Opening the WebSocket on ws://localhost:8008/connection
cast_receiver.js:55
[ 0.111s] [cast.receiver.Receiver] Receiver started.
cast_receiver.js:55
[ 0.112s] [goog.net.WebSocket] An error occurred: undefined
cast_receiver.js:55
[ 0.113s] [cast.receiver.ConnectionService] Got event: b
cast_receiver.js:55
[ 0.113s] [cast.receiver.ConnectionService] Close connection service websocket
cast_receiver.js:55
[ 0.113s] [goog.net.WebSocket] Closing the WebSocket.
cast_receiver.js:55
WebSocket connection to 'ws://localhost:8008/connection' failed: WebSocket is closed before the connection is established. cast_receiver.js:33
[ 0.114s] [goog.net.WebSocket] The WebSocket on ws://localhost:8008/connection closed.
cast_receiver.js:55
[ 0.115s] [cast.receiver.ConnectionService] Got event: a
cast_receiver.js:55
[ 0.115s] [goog.net.WebSocket] The WebSocket closed normally.