import 'dart:convert'; import 'dart:io'; import 'package:shared/shared.dart'; import 'package:shelf/shelf.dart'; import 'package:shelf/shelf_io.dart'; import 'package:shelf_router/shelf_router.dart'; int count = 0; // Configure routes. final _router = Router() ..post('/', _incrementHandler) ..get('/', _getValueHandler); Future _incrementHandler(Request request) async { final incr = Increment.fromJson(json.decode(await request.readAsString())); count += incr.by; return Response.ok(json.encode(Count(count).toJson())); } Response _getValueHandler(Request request) => Response.ok(json.encode(Count(count).toJson())); void main(List args) async { // Use any available host or container IP (usually `0.0.0.0`). final ip = InternetAddress.anyIPv4; // Configure a pipeline that logs requests. final handler = Pipeline().addMiddleware(logRequests()).addHandler(_router); // For running in containers, we respect the PORT environment variable. final port = int.parse(Platform.environment['PORT'] ?? '8080'); final server = await serve(handler, ip, port); print('Server listening on port ${server.port}'); }