Sends random concurrent requests to a CRUD API

concurrentRandomRequest.go

package main

import (
	"fmt"
	"log"
	"math"
	"math/rand"
	"net/http"
	"runtime"
	"strings"
	"sync"
	"time"
)

const API_URL = "http://127.0.0.1:8080/api/"

var methods = []string{"GET", "PUT", "POST", "DELETE"}

func main() {
	requestMethods := []string{"GET", "POST", "PUT", "DELETE"}

	concurrentRequestCount := runtime.GOMAXPROCS(1)

	for {
		var wg sync.WaitGroup

		for i := 0; i < concurrentRequestCount; i++ {
			wg.Add(1)
			go sendRandomRequest(&wg)
		}
		wg.Wait()
	}
	fmt.Println(requestMethods)
}

func sendRandomRequest(wg *sync.WaitGroup) {
	defer wg.Done()
	randomIdx := int(math.Floor(rand.Float64() * 4))
	randomMethod := methods[randomIdx]
	requestUrl := fmt.Sprintf("%s%s", API_URL, strings.ToLower(randomMethod))

	req, err := http.NewRequest(randomMethod, requestUrl, nil)
	if err != nil {
		log.Fatal("err", err)
	}

	client := http.Client{}

	before := time.Now()
	resp, err := client.Do(req)
	if err != nil {
		log.Fatal("err2", err)
	}
	duration := time.Since(before)
	defer resp.Body.Close()
	fmt.Printf("%s - %vms\n", randomMethod, duration.Milliseconds())
}