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35 lines
616 B
Go
35 lines
616 B
Go
4 years ago
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package generate
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import (
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"crypto/rand"
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"math/big"
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)
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// GetRandomString 取得隨機字串
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func GetRandomString(n int) (string, error) {
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const alphaNum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
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buffer := make([]byte, n)
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max := big.NewInt(int64(len(alphaNum)))
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for i := 0; i < n; i++ {
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index, err := randomInt(max)
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if err != nil {
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return "", err
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}
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buffer[i] = alphaNum[index]
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}
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return string(buffer), nil
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}
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func randomInt(max *big.Int) (int, error) {
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random, err := rand.Int(rand.Reader, max)
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if err != nil {
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return 0, err
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}
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return int(random.Int64()), nil
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}
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