Flutter/Dart socket communication, characters encoding issue - sockets

Question

For a proof of concept where 2 applications, written in Flutter and running on the same device, need to exchange information, I am using the 'dart:io' Sockets.
One of the 2 applications implements a SocketServer to receive the information and the other initializes the sockets communication.
From a connection perspective, this is working fine, using the following code:
Code of the server:
ServerSocket.bind('127.0.0.1', 8080).then((ServerSocket socketServer) {
socketServer.listen((Socket socket) {
socket.listen((List<int> data){
String result = String.fromCharCodes(data);
print('received: $result');
});
});
}).catchError(print);
Code of the client:
Socket.connect('127.0.0.1', 8080).then((socket) {
String data = 'Les élèves regardent par la fenêtre';
socket.write(data);
print("sent: $data");
}).catchError(print);
However, when I try to send a String which contains accentuated characters, I have the following outcome:
sent: Les élèves regardent par la fenêtre
received: Les élèves regardent par la fenêtre
This looks like an encoding related issue but I haven't yet been able to solve it.
Would anybody have any idea how to proceed to have this working?
Thanks

Answer 1

I found the solution.
Here it is:
Code for the Client:
Socket.connect('127.0.0.1', 8080).then((socket) {
String data = 'Les élèves regardent par la fenêtre';
socket.encoding = utf8; // <== force the encoding
socket.write(data);
print("sent: $data");
}).catchError(print);
Code for the Server:
ServerSocket.bind('127.0.0.1', 8080).then((ServerSocket socketServer) {
socketServer.listen((Socket socket) {
socket.listen((List<int> data){
String result = utf8.decode(data);
print('received: $result');
});
});
}).catchError(print);
The solution consists of "forcing" the encoding to utf8
Thanks for your help.

Answer 2

You should try using ut8.encode when writing the data, and utf8.decode when reading it on the other side.