基本上，我试图检查我的WebSocket Server.ws的状态。然而，当我查询Server.ws.readyState时，我得到的唯一响应是WebSocket.OPEN。如果它总是返回WebSocket.OPEN，我如何检查WebSocket是否断开连接？
例如，我曾尝试关闭用于测试Flutter应用的设备的WiFi。通常情况下，一秒钟后，WebSocket被认为断开连接，并使用WebSocketStatus.GOING_AWAY关闭代码关闭连接。我认为这也会更改WebSocket.readyState，但似乎并非如此。
那么，如何正确检查WebSocket的状态？
我目前如何检查：

/// Connection status
IconButton _status() {
  IconData iconData;

  switch (Server.ws?.readyState) {
    case WebSocket.CONNECTING:
      print("readyState : CONNECTING");
      iconData = Icons.wifi;
      break;
    case WebSocket.OPEN:
      print("readyState : OPEN");
      iconData = Icons.signal_wifi_4_bar;
      break;
    case WebSocket.CLOSING:
      print("readyState : CLOSING");
      iconData = Icons.signal_wifi_4_bar_lock;
      break;
    case WebSocket.CLOSED:
      print("readyState : CLOSED");
      iconData = Icons.warning;
      break;
    default:
      print("readyState : " + Server.ws.readyState.toString());
      break;
  }

  return new IconButton(
    icon: new Icon(iconData),
    tooltip: 'Connection Status', // TODO:Localize
    onPressed: () {
      setState(() {
        Server.ws.close();
      });
    },
  );
}

有关WebSocket的其他信息：

/// Should be called when the IP is validated
void startSocket() {
  try {
    WebSocket.connect(Server.qr).then((socket) {
      // Build WebSocket
      Server.ws = socket;
      Server.ws.listen(
        handleData,
        onError: handleError,
        onDone: handleDone,
        cancelOnError: true,
      );
      Server.ws.pingInterval = new Duration(
        seconds: Globals.map["PingInterval"],
      );

      send(
        "CONNECTION",
        {
          "deviceID": Globals.map["UUID"],
        },
      );
    });
  } catch (e) {
    print("Error opening a WebSocket : $e");
  }
}

/// Handles the closing of the connection.
void handleDone() {
  print("WebSocket closed.");
  new Timer(new Duration(seconds: Globals.map["PingInterval"]), startSocket);
}

/// Handles the WebSocket's errors.
void handleError(Error e) {
  print("WebSocket error.");
  print(e);
  Server.ws.close();
}