App instance

final app = createApp(
  port: 3000,         // Default port
  autoStart: true,    // Automatic startup
  onRequest: myMiddleware,
  onError: errorHandler,
  afterResponse: responseLogger
);

app = createApp(
  onRequest: (request) {
    print('Incoming ${request.method} @ ${request.url}');
    return request;
  },
  afterResponse: (response) {
    print('Outgoing ${response.statusCode}');
    return response;
  }
);

createApp(
  onError: (error, stackTrace, event) {
    print('[ERROR] ${error.toString()}');
    if (event != null) {
      print('Failed request: ${event.request.method} ${event.request.url}');
    }
    return ErrorResponse(500, 'Custom error message');
  }
)

final app = createApp(
  port: 8080,
  autoStart: false
);
 
// Later in code
await app.start().then((instance) {
  print('Server running on ${instance.port}');
});

final app = createApp();
final router = createRouter();
 
router.get('/api', (event) => {'status': 'ok'});
router.post('/submit', handleSubmission);
 
app.use(router); // Mount router middleware

import 'package:h4/create.dart';
 
void main() async {
  final app = createApp(
    port: 8080,
    onRequest: (req) {
      print('Request started: ${DateTime.now()}');
      return req;
    },
    onError: (err, stack, event) {
      print('Error: $err');
      return ErrorResponse(500, 'Server error');
    },
    afterResponse: (res) {
      print('Response sent: ${DateTime.now()}');
      return res;
    }
  );
 
  final router = createRouter()
    ..get('/', (event) => 'Welcome to H4')
    ..post('/data', handleData);
 
  app.use(router);
 
  await app.start();
}