Flaute WebApp Chrome Webhost is not supporting dart.html

[xunreal75]

connectanum in Flutter crashes because Websocket can't established on connect via dart.html

[konsultaner]

@xunreal75 Could you please provide a reproducer? I really don't understand what is ment by your error description.

[xunreal75]

Hi,

I workarounded the connection by copying your websocket_transport_html.dart to my own app with following changes
removed dart.html //--> makes impossible to create a Websocket via ChromeApp
import 'package:universal_html/html.dart'; //this package can establish and acknowledge an Websocket

// at line 71I added
_socket = HtmlWebSocketChannel.connect(_url).innerWebSocket;
//_socket = WebSocket(_url, [_serializerType]);

[xunreal75]

It's only wrong going in starting Flutter as Chrome Web App - although you show support WEB

[konsultaner]

@xunreal75 ok, maybe this is an issue with the conditional web package loading. I'll check it out.

[konsultaner]

_socket = HtmlWebSocketChannel.connect(_url).innerWebSocket;
What is the package you are using?

[xunreal75]

Hi

for getting a connection I used 'package:universal_html/html.dart'; for testing purposes to open the connection

I had not more time to validate the connection ...

// at line 71I added
_socket = HtmlWebSocketChannel.connect(_url).innerWebSocket;
//_socket = WebSocket(_url, [_serializerType]);
//at line 77
_socket.onOpen.listen((open) => openCompleter.complete(open));
_socket.onError.listen((error) {
//Event //removed from function
openCompleter.completeError(error);
_onConnectionLost!.complete(error);
});

[xunreal75]

Any news here for implementation in Flutter?

[konsultaner]

@xunreal75 Sorry, this is dart/sdk bug I already posted. I need to contribute to dart/sdk itself to get it to work with subprotocol. very enoying...

[konsultaner]

@xunreal75 I currently work on wasm support for this package. I reviewed your issue and saw that your code

_socket = HtmlWebSocketChannel.connect(_url).innerWebSocket;

doesn't use subprotocols. I bet your websocket server needs to configure the subprotocol?

Checkout my latest branch with package:web there is a working unit test with a websocket server. (delete the dart_test.yaml) before you run your test. you should manually run it with -p chrome