r.go

func GenerateRandomString(length int) string {  
        const chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890abcdefghijklmnopqrstuvwxyz"
        rand.Seed(time.Now().Unix())
        str := make([]string, length)
        for i := 0; i < length; i++ {
                index := rand.Intn(len(chars))
                str[i] = chars[index : index+1]
        }
        return strings.Join(str, "")
}