check status code of websites

status-checker.go

package main

import (
	"fmt"
	"net/http"
	"runtime"
)

func printDomain(d string) {
	fmt.Println(d)
}

func checker(linkCh <-chan string, done chan<- int) {
	for link := range linkCh {
		resp, err := http.Get(link)
		if err != nil {
			fmt.Println("No response from", link)
		} else {
			fmt.Println("Status of %v is", link, resp.StatusCode)
		}

		done <- 1
	}
}

func main() {
	links := []string{
		"http://googleeeeeqq.com",
		"http://facebook.com",
		"http://stackoverflow.com",
		"http://golang.org",
		"http://amazon.com",
	}

	nWorkers := runtime.NumCPU()
	ch := make(chan string, len(links))
	done := make(chan int, len(links))

	for _, link := range links {
		ch <- link
	}

	for i := 0; i < nWorkers; i++ {
		go checker(ch, done)
	}

	for i := 0; i < len(links); i++ {
		<-done
	}

	fmt.Print("OK")
}

status-checker2.go

package main

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

func main() {
	links := []string{
		"http://googleeeeeqq.com",
		"http://facebook.com",
		"http://stackoverflow.com",
		"http://golang.org",
		"http://amazon.com",
	}

	exit := make(chan bool, 1)

	for _, link := range links {
		go check(link)
	}

	<-exit
}

func check(link string) {
	for {
		resp, err := http.Get(link)
		if err != nil {
			log.Println("err with:", link)
		} else {
			fmt.Printf("status: %v: %v\n", resp.StatusCode, link)
		}
		time.Sleep(time.Second * 2)
	}
}