mirror of
https://github.com/astaxie/beego.git
synced 2024-11-29 19:11:29 +00:00
41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
// Beego (http://beego.me/)
|
|
// @description beego is an open-source, high-performance web framework for the Go programming language.
|
|
// @link http://github.com/astaxie/beego for the canonical source repository
|
|
// @license http://github.com/astaxie/beego/blob/master/LICENSE
|
|
// @authors astaxie
|
|
|
|
package utils
|
|
|
|
import (
|
|
"crypto/rand"
|
|
r "math/rand"
|
|
"time"
|
|
)
|
|
|
|
// RandomCreateBytes generate random []byte by specify chars.
|
|
func RandomCreateBytes(n int, alphabets ...byte) []byte {
|
|
const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
|
|
var bytes = make([]byte, n)
|
|
var randby bool
|
|
if num, err := rand.Read(bytes); num != n || err != nil {
|
|
r.Seed(time.Now().UnixNano())
|
|
randby = true
|
|
}
|
|
for i, b := range bytes {
|
|
if len(alphabets) == 0 {
|
|
if randby {
|
|
bytes[i] = alphanum[r.Intn(len(alphanum))]
|
|
} else {
|
|
bytes[i] = alphanum[b%byte(len(alphanum))]
|
|
}
|
|
} else {
|
|
if randby {
|
|
bytes[i] = alphabets[r.Intn(len(alphabets))]
|
|
} else {
|
|
bytes[i] = alphabets[b%byte(len(alphabets))]
|
|
}
|
|
}
|
|
}
|
|
return bytes
|
|
}
|