/
random_string.go
68 lines (57 loc) · 1.36 KB
/
random_string.go
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package util
import (
"fmt"
"math/rand"
"time"
)
func init() {
rand.Seed(time.Now().Unix())
}
var (
stringMisc = []byte(".$#@&*_")
stringDigit = []byte("1234567890")
stringDigitLen = len(stringDigit)
stringLword = []byte("abcdefghijklmnopqrstuvwxyz")
stringLwordLen = len(stringLword)
stringUWord = []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZ")
stringUWordLen = len(stringUWord)
stringCWord = []byte(fmt.Sprintf("%s%s", stringLword, stringUWord))
stringCWordLen = len(stringCWord)
letterRunes = []byte(fmt.Sprintf("%s%s%s%s", stringDigit, stringLword, stringMisc, stringUWord))
letterRunesLen = len(letterRunes)
)
func RandomString(n int) string {
b := make([]byte, n)
for i := range b {
b[i] = letterRunes[rand.Intn(letterRunesLen)]
}
return string(b)
}
func RandStringWordL(n int) string {
b := make([]byte, n)
for i := range b {
b[i] = stringLword[rand.Intn(stringLwordLen)]
}
return string(b)
}
func RandStringWordU(n int) string {
b := make([]byte, n)
for i := range b {
b[i] = stringUWord[rand.Intn(stringUWordLen)]
}
return string(b)
}
func RandStringWordC(n int) string {
b := make([]byte, n)
for i := range b {
b[i] = stringCWord[rand.Intn(stringCWordLen)]
}
return string(b)
}
func RandStringDigit(n int) string {
b := make([]byte, n)
for i := range b {
b[i] = stringDigit[rand.Intn(stringDigitLen)]
}
return string(b)
}