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utils.go
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utils.go
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package ksbus
import (
"crypto/rand"
"encoding/base64"
"encoding/hex"
"io"
"os"
"os/exec"
"runtime"
"syscall"
)
func GenerateRandomString(s int) string {
b, _ := GenerateRandomBytes(s)
return base64.URLEncoding.EncodeToString(b)
}
// Generate Random Bytes
func GenerateRandomBytes(n int) ([]byte, error) {
b := make([]byte, n)
_, err := rand.Read(b)
// err == nil only if len(b) == n
if err != nil {
return nil, err
}
return b, nil
}
func GenerateUUID() string {
var uuid [16]byte
_, err := io.ReadFull(rand.Reader, uuid[:])
if err != nil {
return ""
}
uuid[6] = (uuid[6] & 0x0f) | 0x40 // Version 4
uuid[8] = (uuid[8] & 0x3f) | 0x80 // Variant is 10
var buf [36]byte
encodeHex(buf[:], uuid)
return string(buf[:])
}
func encodeHex(dst []byte, uuid [16]byte) {
hex.Encode(dst, uuid[:4])
dst[8] = '-'
hex.Encode(dst[9:13], uuid[4:6])
dst[13] = '-'
hex.Encode(dst[14:18], uuid[6:8])
dst[18] = '-'
hex.Encode(dst[19:23], uuid[8:10])
dst[23] = '-'
hex.Encode(dst[24:], uuid[10:])
}
func RestartSelf() error {
self, err := os.Executable()
if err != nil {
return err
}
args := os.Args
env := os.Environ()
// Windows does not support exec syscall.
if runtime.GOOS == "windows" {
cmd := exec.Command(self, args[1:]...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Stdin = os.Stdin
cmd.Env = env
err := cmd.Run()
if err == nil {
os.Exit(0)
}
return err
}
return syscall.Exec(self, args, env)
}