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33 lines
608 B
33 lines
608 B
package common
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import (
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"math/rand"
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)
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const (
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strChars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" // 62 characters
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)
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// Construts an alphanumeric string of given length.
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func RandStr(length int) string {
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chars := []byte{}
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MAIN_LOOP:
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for {
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val := rand.Int63()
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for i := 0; i < 10; i++ {
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v := int(val & 0x3f) // rightmost 6 bits
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if v >= 62 { // only 62 characters in strChars
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val >>= 6
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continue
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} else {
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chars = append(chars, strChars[v])
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if len(chars) == length {
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break MAIN_LOOP
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}
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val >>= 6
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}
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}
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}
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return string(chars)
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}
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