Ejemplo n.º 1
0
func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())
	link = linkio.NewLink(linkio.Throughput(rate))
	gzipHandler := gziphandler.GzipHandler(http.HandlerFunc(handler))
	http.HandleFunc("/data/", rateLimitedHandler)
	http.Handle("/", gzipHandler)
	http.Handle("/data/manifest.json", gzipHandler)
	log.Fatal(http.ListenAndServe(":8000", nil))
}
Ejemplo n.º 2
0
// LinkSpeed implements ChaosMonkey.LinkSpeed
func (j *Jim) LinkSpeed() *linkio.Throughput {
	rand.Seed(time.Now().Unix())
	if rand.Float64() < j.LinkSpeedAffect {
		lsDiff := j.LinkSpeedMax - j.LinkSpeedMin
		lsAffect := j.LinkSpeedMin + (lsDiff * rand.Float64())
		f := linkio.Throughput(lsAffect) * linkio.BytePerSecond
		j.logf("Jim: Restricting throughput to %s\n", f)
		return &f
	}
	j.logf("Jim: Allowing unrestricted throughput")
	return nil
}
Ejemplo n.º 3
0
func rateLimitedHandler(w http.ResponseWriter, r *http.Request) {
	var filePath string = ""

	if strings.EqualFold(r.URL.Path, "/") {
		filePath = "./index.html"
	} else {
		filePath = "." + r.URL.Path
	}
	var ok error
	lrw := NewLimitedResponseWriter(w)

	q := r.URL.Query()

	if (len(q["rate"])) != 0 {
		_, ok = strconv.Atoi(q["rate"][0])
		if ok == nil {
			rate, _ = strconv.Atoi(q["rate"][0])
			rate = rate * 1024 // in kBytes
			link.SetThroughput(linkio.Throughput(rate * 6 / 5))
		}
	}

	if (len(q["latency"])) != 0 {
		_, ok = strconv.Atoi(q["latency"][0])
		if ok == nil {
			latency, _ = strconv.Atoi(q["latency"][0])
		}
	}

	if latency != 0 {
		time.Sleep(time.Duration(latency) * time.Millisecond)
	}

	file, err := os.Open(filePath)
	if err != nil {
		fmt.Printf("%s not found\n", filePath)
		w.WriteHeader(http.StatusNotFound)
		fmt.Fprint(w, "<html><body style='font-size:100px'>four-oh-four</body></html>")
		return
	}
	defer file.Close()
	//fileStat, err := os.Stat(filePath)
	//if err != nil {
	//fmt.Println(err)
	//}
	fmt.Printf("Rate limited serve %s with rate %d kbps and latency %d ms\n", filePath, rate/1024, latency)
	_, filename := path.Split(filePath)
	//t := fileStat.ModTime()
	//fmt.Printf("time %+v\n", t)
	http.ServeContent(lrw, r, filename, time.Now(), file)
}
Ejemplo n.º 4
0
func handler(w http.ResponseWriter, r *http.Request) {
	var filePath string = ""

	if strings.EqualFold(r.URL.Path, "/") {
		filePath = "./index.html"
	} else {
		filePath = "." + r.URL.Path
	}

	var ok error
	q := r.URL.Query()

	if (len(q["rate"])) != 0 {
		_, ok = strconv.Atoi(q["rate"][0])
		if ok == nil {
			rate, _ = strconv.Atoi(q["rate"][0])
			rate = rate * 1024
			link.SetThroughput(linkio.Throughput(rate * 6 / 5))
		}
	}

	if (len(q["latency"])) != 0 {
		_, ok = strconv.Atoi(q["latency"][0])
		if ok == nil {
			latency, _ = strconv.Atoi(q["latency"][0])
		}
	}
	file, err := os.Open(filePath)
	if err != nil {
		fmt.Printf("%s not found\n", filePath)
		w.WriteHeader(http.StatusNotFound)
		fmt.Fprint(w, "<html><body style='font-size:100px'>four-oh-four</body></html>")
		return
	}
	defer file.Close()
	fileStat, err := os.Stat(filePath)
	if err != nil {
		fmt.Println(err)
	}
	fmt.Printf("serve %s\n", filePath)
	_, filename := path.Split(filePath)
	t := fileStat.ModTime()
	fmt.Printf("time %+v\n", t)
	http.ServeContent(w, r, filename, t, file)
}