Function RandomString

backend/common/util.go:43–59

RandomString returns a random string with length n.

(n int)

// RandomString returns a random string with length n.
func RandomString(n int) (string, error) {
	var sb strings.Builder
	sb.Grow(n)
	for i := 0; i < n; i++ {
		// The reason for using crypto/rand instead of math/rand is that
		// the former relies on hardware to generate random numbers and
		// thus has a stronger source of random numbers.
		randNum, err := rand.Int(rand.Reader, big.NewInt(int64(len(letters))))
		if err != nil {
			return "", err
		}
		if _, err := sb.WriteRune(letters[randNum.Uint64()]); err != nil {
			return "", err
		}
	}
	return sb.String(), nil
}

// HasPrefixes returns true if the string s has any of the given prefixes.
func HasPrefixes(src string, prefixes ...string) bool {