run method
Implementation
run() async {
runZonedGuarded(() async {
var server = await HttpServer.bind('127.0.0.1', 4040);
await for (var req in server) {
// Upgrade a HttpRequest to a WebSocket connection.
var socket = await WebSocketTransformer.upgrade(req);
socket.listen(handleMsg);
}
}, (e, s) => print(e)); // Will print "asynchronous error".
}