platform/example/rate_limit.dart
2019-08-16 09:00:56 -04:00

34 lines
1.1 KiB
Dart

import 'package:angel_framework/angel_framework.dart';
import 'package:angel_framework/http.dart';
import 'package:angel_security/angel_security.dart';
import 'package:logging/logging.dart';
import 'package:pretty_logging/pretty_logging.dart';
main() async {
// Logging boilerplate.
Logger.root.onRecord.listen(prettyLog);
// Create an app, and HTTP driver.
var app = Angel(logger: Logger('rate_limit')), http = AngelHttp(app);
// Create a simple in-memory rate limiter that limits users to 5
// queries per 30 seconds.
//
// In this case, we rate limit users by IP address.
var rateLimiter =
InMemoryRateLimiter(5, Duration(seconds: 30), (req, res) => req.ip);
// `RateLimiter.handleRequest` is a middleware, and can be used anywhere
// a middleware can be used. In this case, we apply the rate limiter to
// *all* incoming requests.
app.fallback(rateLimiter.handleRequest);
// Basic routes.
app
..get('/', (req, res) => 'Hello!')
..fallback((req, res) => throw AngelHttpException.notFound());
// Start the server.
await http.startServer('127.0.0.1', 3000);
print('Rate limiting example listening at ${http.uri}');
}