Golang RateLimiter Examples

Example #1

File: handlers.go Project: cjnygard/origin

// RateLimit uses rl to rate limit accepting requests to 'handler'.
func RateLimit(rl util.RateLimiter, handler http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
		if rl.CanAccept() {
			handler.ServeHTTP(w, req)
			return
		}
		tooManyRequests(w)
	})
}

Example #2

File: handlers.go Project: ericcapricorn/kubernetes

// RateLimit uses rl to rate limit accepting requests to 'handler'.
func RateLimit(rl util.RateLimiter, handler http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
		if rl.CanAccept() {
			handler.ServeHTTP(w, req)
			return
		}
		w.WriteHeader(http.StatusServiceUnavailable)
		fmt.Fprintf(w, "Rate limit exceeded.")
	})
}

Example #3

File: handlers.go Project: vrosnet/kubernetes

// RateLimit uses rl to rate limit accepting requests to 'handler'.
func RateLimit(rl util.RateLimiter, handler http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
		if rl.CanAccept() {
			handler.ServeHTTP(w, req)
			return
		}
		// Return a 429 status indicating "Too Many Requests"
		w.Header().Set("Retry-After", "1")
		w.WriteHeader(errors.StatusTooManyRequests)
		fmt.Fprintf(w, "Rate limit is 10 QPS or a burst of 200")
	})
}