判断域名是否通go脚本

package main

import (
  "fmt"
  "os"
  "os/exec"
  "strings"
)

func main() {
  for i := range os.Args {
    replacer := strings.NewReplacer("http://", "", "https://", "","www.","")
    str1 := replacer.Replace(os.Args[i])
    //fmt.Println(str1)
    str_arr := strings.Split(str1, `/`)
    for _, str := range str_arr{
      //fmt.Println(str)
      if strings.HasSuffix(str,"com") {
        fmt.Println(str)
        pingtest(str)
      } else if strings.HasSuffix(str,"net"){
        fmt.Println(str)
        pingtest(str)
      } else if strings.HasSuffix(str,"cn"){
        fmt.Println(str)
        pingtest(str)
      }
    }

  }

}

func pingtest(b string) {
  cmd := exec.Command("ping", b, "-c", "4", "-W", "5")
  err := cmd.Run()
  if err != nil {
    fmt.Println(b + "不通")
  } else {
    fmt.Println("Net Status , OK")
  }
}