https://github.com/dart-lang/web_socket_channel/issues/38

yes, my workaround is to create a WebSocket directly. Something like:

      final socket = await WebSocket
.connect(url.toString())
.timeout(_webSocketConnectionTimeout);
return IOWebSocketChannel(socket);

Then I wrap this in a try-catch, so I can catch SocketException and TimeoutException and handle these in a way that makes sense for my app.

the following way works for me:

      stream = widget.webSocketChannel.stream;
streamSubscription = stream.listen(
onData,
onError: (error) {
// method calls and what not here
},
cancelOnError: true);
}

I don't know if it is working because I have a StreamSubscription or whether it simply is an additional step.

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