website-status-check

main.go

package main

import (
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"time"
)

func main() {
	wait := flag.Int("wait", 3, "the number of seconds to wait when checking the URL")
	flag.Parse()

	args := os.Args
	if len(args) < 1 {
		fmt.Println("you must pass a URL to monitor as the first argument")
		flag.PrintDefaults()
		os.Exit(1)
	}
	url := args[1]

	var status int
	for status != http.StatusOK {
		resp, err := http.Get(url)
		if err != nil {
			log.Fatal(err)
		}

		if resp.StatusCode == 200 {
			status = resp.StatusCode
			break
		}

		log.Println(fmt.Sprintf("received the response code %d from %s", resp.StatusCode, url))

		time.Sleep(time.Duration(*wait) * time.Second)
	}

	log.Println(fmt.Sprintf("received the response code 200 from %s", url))
}