sendReceive method

@override Future<Uint8List?> sendReceive(String epName, Uint8List data)

Implementation

@override
Future<Uint8List?> sendReceive(String epName, Uint8List data) async {
  try {
    print("Connecting to " + hostname + "/" + epName);
    final response = await client
        .post(
            Uri.http(
              hostname,
              "/" + epName,
            ),
            headers: headers,
            body: data)
        .timeout(timeout)
        .onError((error, stackTrace) {
      print("onError");
      print(error.toString());
      print(stackTrace.toString());
      return Future.error(error!);
    });

    _updateCookie(response);
    if (response.statusCode == 200) {
      print('Connection successful');
      // client.close();
      final Uint8List body_bytes = response.bodyBytes;
      return body_bytes;
    } else {
      print('Connection failed – HTTP-Status ${response.statusCode}');
      throw Future.error(Exception("ESP Device doesn't repond. HTTP-Status ${response.statusCode}"));
    }
  } catch (e) {
    throw StateError('StateError in transport_http.dart – Connection error (${e.runtimeType.toString()})' + e.toString());
  }
}