Websocket Server

import 'dart:io';

main(List<String> args) async {
  var server = await HttpServer.bind('127.0.0.1', 8080);
  server.listen((HttpRequest req) async {
    if (req.uri.path == '/ws') {
      var socket = await WebSocketTransformer.upgrade(req);
      socket.listen((data) => print(data));
    }
  });
}