Go HTTP limit rate

http_limit_rate.go

import "github.com/beefsack/go-rate"

func limitRate(handler func(w http.ResponseWriter, r *http.Request), max_requests int, period time.Duration) func(w http.ResponseWriter, r *    http.Request) {
  rl := rate.New(max_requests, period)

  return func(w http.ResponseWriter, r *http.Request) {
    ok, _ := rl.Try()

    if ok {
      handler(w, r)
    } else {
      http.Error(w, "Too many requests", 429)
    }     
  }
}