Simple load producer

balabol.go

package main

import (
	"fmt"
	"flag"
	//"errors"
	//"os"
	//"strings"
	"strconv"
	"math/rand"
	"time"
	//"net/http"
	)
type Visitor struct {
	id int
	r  string
	pg string
	c  string
	j  string
	wh string
	px int
	js float64
	col string
	t string
	p string
}


func main() {
	
	start := time.Now()
	
	var h = flag.String("w", "http://localhost/", "Address of resource")
	var r = flag.Int("r", 1, "Requests per second")
	var t = flag.Int("t", 1, "Duration in seconds")

	flag.Parse()
	
	/*var ErrHelp = errors.New("flag: help requested")
	var Usage = func () {
		fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
		flag.PrintDefaults()
	}*/
	// set of monitor resolutions
	res := []string{"340x480", "420x640", "600x1024", "720x1280", "1050x1680", "1080x1980"}
	// set of colors
	colors := []string{"FFFFFF", "FFCC00", "FF3399", "9933FF", "6600FF", "00FF00"}
	// js versions
	js := []float64{1.3, 1.2, 1.1, 1.0}
	// set pointer to visitor
	v := new(Visitor)
	// show set flags
	fmt.Println("Target", *h, "Request/second", *r, "Duration", *t)
	// set timers
	rps := time.Duration(1000/(*r))
	// set duration of requests
	d := time.Duration(*t)
	// set ticker interval
	ticker := time.NewTicker(time.Millisecond * rps)
	var i = 1;
	go func () {
		for t := range ticker.C {
			v.id = i
			v.r = res[rand.Intn(len(res))]
			v.col = colors[rand.Intn(len(res))]
			v.js = js[rand.Intn(len(js))]
			url := *h + "?id=" + strconv.Itoa(v.id) + "&r=" + v.r + "&j=" + strconv.FormatFloat(v.js, 'f', -1, 32) + "&col=" + v.col
			fmt.Println("URL =>", url, t)
			i++
		}			
	}()
	time.Sleep(time.Second * d)
	ticker.Stop()

	fmt.Println("Time spent", time.Since(start))
}