package cloud115

import "math/rand"

const randCharset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"

// RandomString 生成指定长度的随机字符串（PKCE code_verifier 等）。
func RandomString(length int) string {
	b := make([]byte, length)
	for i := range b {
		b[i] = randCharset[rand.Intn(len(randCharset))]
	}
	return string(b)
}