rate limiting

import "time"

import "fmt"

func main() {

    requests := make(chan int, 5)

    for i := 1; i < 5; i++ {

        requests <- i

    }

    close(requests)

    limiter := time.Tick(time.Millisecond * 200)

    for req := range requests {

        <-limiter

        fmt.Println("request", req, time.Now())

    }

    burstylimiter := make(chan time.Time, 3)

    for i := 0; i < 3; i++ {

        burstylimiter <- time.Now()

    }

    go func() {

        for t := range time.Tick(time.Millisecond * 200) {

            burstylimiter <- t

        }

    }()

    burstyRequests := make(chan int, 5)

    for i := 1; i <= 5; i++ {

        burstyRequests <- i

    }

    close(burstyRequests)

    for req := range burstyRequests {

        <-burstylimiter

        fmt.Println("request", req, time.Now())

    }

}