package main

import (
    "fmt"
    "net/http"
)

func main() {
    links := []string{
        "http://google.com",
        "http://yahoo.com",
        "http://sportacentrs.com",
        "http://golang.org",
        "http://facebook.com",
    }
    c := make(chan string)
    for _, link := range links {
        go checkLink(link, c)
    }
    for l := range c {
        go checkLink(l, c)
    }
}

func checkLink(link string, c chan string) {
    _, err := http.Get(link)
    if err != nil {
        fmt.Println(link, "might be down!")
        c <- link
        return
    }
    fmt.Println(link, "is up!")
    c <- link
}