package webutility
  
  import (
  	"crypto/rand"
  	"fmt"
  )
  
  // GUID ...
  func GUID() (string, error) {
  	b := make([]byte, 16)
  	_, err := rand.Read(b)
  	if err != nil {
  		return "", err
  	}
  	id := fmt.Sprintf("%x-%x-%x-%x-%x", b[0:4], b[4:6], b[6:8], b[8:10], b[10:])
  	return id, nil
  }