How to deal with HTTP connection timed out crashes in Flutter

So I have a method that uses the Flutter HTTP library and is responsible for calling HTTP requests to the server with code like this:

Future<List<DataModel>> fetchData() async {
  try {
    var url = Uri.parse('${baseUrlParse}myapipath');
    var request = await http.get(url);

    var data = jsonDecode(request.body);

    return data;
  } catch (e) {
    print('Catch ${e}');
    rethrow;
  }
}

This code runs fine and has no issues.
It got to the point where when I have no internet connection or server connection fails, the app freezes, and an error file appears (if you're debugging in VS Code), called http_impl.dart, and the error snippet goes something like this:

onError: (error) {
// When there is a timeout, there is a race in which the connectionTask
// Future won't be completed with an error before the socketFuture here
// is completed with a TimeoutException by the onTimeout callback above.
// In this case, propagate a SocketException as specified by the
// HttpClient.connectionTimeout docs.
if (error is TimeoutException) {
  assert(connectionTimeout != null);
  _connecting--;
  _socketTasks.remove(task);
  task.cancel();
  throw SocketException(
      "HTTP connection timed out after $connectionTimeout, "
      "host: $host, port: $port");
}
_socketTasks.remove(task);
_checkPending();
throw error;
});

I have tried to implement from this source and this, but when I make a request but have no connection, this error still occurs.

How to deal with this problem?
What I want is, if there is a problem with HTTP either there is no connection, or it fails to contact the server, then I can make a notification..

Is there something wrong with my code? Please help, thank you

1. You re throw the exception in your code, You need to catch exception where you call to this method like this.

   try { await fetchData(); } catch (e) { // TODO: handle exception }

2. You can stop VS Code catching unhandled exceptions from this way https://superuser.com/a/1609472