can't access websocket's response headers

[aliforever]

Currently it's not possible to access response and its headers. This might be important in some cases, like when the server authenticates the client and sends an authorization header along with the response. I'm guessing exposing the response object as a property on WebSocket class would solve the issue.

[cachapa]

From my superficial review of the code it seems this could be done by returning the HttpClientResponse object with the error message:

websocket_impl.dart, 1049-1056

     Future<WebSocket> error(String message) {
        // Flush data.
        response.detachSocket().then((socket) {
          socket.destroy();
        });
        return Future<WebSocket>.error(
            WebSocketException(message, response), callerStackTrace);
      }

websocket.dart, 408-414:

class WebSocketException implements IOException {
  final String message;
  final HttpClientResponse? response;

  const WebSocketException([this.message = "", this.response]);

  String toString() => "WebSocketException: $message";
}

I haven't tested the code myself though so I may be missing something.

[cachapa]

To expand on my previous comment, it would actually be a lot more useful to have access to the response object even in the even of a successful connection.

My particular use case involves being able to read the response headers.