REST API Skeleton

import 'dart:io';
import 'package:routed/routed.dart';

Future<void> main() async {
final engine = Engine(
  options: [withMiddleware([timeoutMiddleware(const Duration(seconds: 10))])],
);

  final api = Router(path: '/api');

  api.group(path: '/users', builder: (users) {
    users.get('/', (ctx) => ctx.json({'users': _users.values.toList()}));

    users.post('/', (ctx) async {
      final payload = <String, dynamic>{};
      await ctx.bindJSON(payload);
      await ctx.validate({'name': 'required|string', 'email': 'required|email'});

      final id = _users.length + 1;
      final user = {'id': id, 'name': payload['name'], 'email': payload['email']};
      _users[id] = user;

      return ctx.json(user, statusCode: HttpStatus.created);
    });

    users.get('/{id:int}', (ctx) {
      final id = ctx.params['id'] as int;
      final user = _users[id];
      if (user == null) {
        return ctx.json({'error': 'User not found'}, statusCode: HttpStatus.notFound);
      }
      return ctx.json(user);
    });

    users.delete('/{id:int}', (ctx) {
      final id = ctx.params['id'] as int;
      final removed = _users.remove(id);
      if (removed == null) {
        return ctx.json({'error': 'User not found'}, statusCode: HttpStatus.notFound);
      }
      ctx.status(HttpStatus.noContent);
      return ctx.response;
    });
  });

  engine.use(api);
  await engine.serve(host: '127.0.0.1', port: 8080);
}

final _users = <int, Map<String, dynamic>>{};

• ctx.bindJSON + ctx.validate guard payloads.
• ctx.bindJSON + ctx.validate guard payloads. Register the typed providers your application needs and keep middleware ordering visible in the engine and route composition.
• ctx.params['id'] returns the cast value thanks to the :int constraint.
• Errors use HTTP status helpers from dart:io.