42 lines
722 B
Go
42 lines
722 B
Go
package random
|
|
|
|
import (
|
|
"math/rand"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
type Random struct{}
|
|
|
|
const (
|
|
Uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
Lowercase = "abcdefghijklmnopqrstuvwxyz"
|
|
Alphabetic = Uppercase + Lowercase
|
|
Numeric = "0123456789"
|
|
Alphanumeric = Alphabetic + Numeric
|
|
Symbols = "`" + `~!@#$%^&*()-_+={}[]|\;:"<>,./?`
|
|
Hex = Numeric + "abcdef"
|
|
)
|
|
|
|
func New() *Random {
|
|
rand.Seed(time.Now().UnixNano())
|
|
|
|
return new(Random)
|
|
}
|
|
|
|
func (r *Random) String(length int, charsets ...string) string {
|
|
charset := strings.Join(charsets, "")
|
|
|
|
if charset == "" {
|
|
charset = Alphabetic
|
|
}
|
|
|
|
b := make([]byte, length)
|
|
|
|
for i := range b {
|
|
b[i] = charset[rand.Int()%len(charset)]
|
|
}
|
|
|
|
return string(b)
|
|
}
|