openbilibili/app/service/main/antispam/util/rand.go

package util

import "math/rand"

var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")

// RandID .
func RandID() int64 {
	return rand.Int63()
}

// RandStr .
func RandStr(size int) string {
	b := make([]rune, size)
	for i := range b {
		b[i] = letterRunes[rand.Intn(len(letterRunes))]
	}
	return string(b)
}