Example #1
0
func initWebRateLimiter(app *App) {
	rateLimitStore := store.NewMemStore(1000)

	if app.redis != nil {
		rateLimitStore = store.NewRedisStore(app.redis, "throttle:", 0)
	}

	rateLimiter := throttled.RateLimit(
		app.config.RateLimit,
		&throttled.VaryBy{Custom: remoteAddrIP},
		rateLimitStore,
	)

	rateLimiter.DeniedHandler = &RateLimitExceededAction{App: app, Action: Action{}}
	app.web.rateLimiter = rateLimiter
}
Example #2
0
func throttler(perMinRate int) http.Handler {
	t := throttled.RateLimit(throttled.PerMin(perMinRate), &throttled.VaryBy{RemoteAddr: true}, store.NewMemStore(1000))
	return t.Throttle(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		// Nothing needed here
	}))
}
Example #3
0
func main() {
	flag.Parse()

	var h http.Handler
	var ok, ko int
	var mu sync.Mutex
	var st throttled.Store

	// Keep the start time to print since-time
	start := time.Now()
	// Create the rate-limit store
	switch *storeType {
	case "mem":
		st = store.NewMemStore(0)
	case "redis":
		st = store.NewRedisStore(setupRedis(), "throttled:", 0)
	default:
		log.Fatalf("unsupported store: %s", *storeType)
	}
	// Create the rate-limit throttler, varying on path
	t := throttled.RateLimit(throttled.Q{Requests: *requests, Window: *window}, &throttled.VaryBy{
		Path: true,
	}, st)

	// Set its denied handler
	t.DeniedHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if *output == "v" || *output == "ko" {
			log.Printf("KO: %s", time.Since(start))
		}
		throttled.DefaultDeniedHandler.ServeHTTP(w, r)
		mu.Lock()
		defer mu.Unlock()
		ko++
	})

	// Throttle the OK handler
	rand.Seed(time.Now().Unix())
	h = t.Throttle(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if *output == "v" || *output == "ok" {
			log.Printf("ok: %s", time.Since(start))
		}
		if *delayRes > 0 {
			wait := time.Duration(rand.Intn(int(*delayRes)))
			time.Sleep(wait)
		}
		w.WriteHeader(200)
		mu.Lock()
		defer mu.Unlock()
		ok++
	}))

	// Print stats once in a while
	go func() {
		for _ = range time.Tick(10 * time.Second) {
			mu.Lock()
			log.Printf("ok: %d, ko: %d", ok, ko)
			mu.Unlock()
		}
	}()
	fmt.Println("server listening on port 9000")
	http.ListenAndServe(":9000", h)
}