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53 lines
1.1 KiB
Go
53 lines
1.1 KiB
Go
package utils
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import (
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"crypto/rand"
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"encoding/hex"
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"errors"
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"strings"
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)
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func StrToUUID(s string) (uuid [16]byte, err error) {
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if len(s) != 36 {
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return uuid, errors.New("invalid UUID Str: " + s)
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}
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b := []byte(strings.Replace(s, "-", "", -1))
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if len(b) != 32 {
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return uuid, errors.New("invalid UUID Str: " + s)
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}
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_, err = hex.Decode(uuid[:], b)
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return
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}
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func UUIDToStr(u [16]byte) string {
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buf := make([]byte, 36)
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hex.Encode(buf[0:8], u[0:4])
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buf[8] = '-'
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hex.Encode(buf[9:13], u[4:6])
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buf[13] = '-'
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hex.Encode(buf[14:18], u[6:8])
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buf[18] = '-'
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hex.Encode(buf[19:23], u[8:10])
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buf[23] = '-'
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hex.Encode(buf[24:], u[10:])
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return string(buf)
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}
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//生成完全随机的uuid
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func GenerateUUID() (r [16]byte) {
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rand.Reader.Read(r[:])
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return
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}
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func GenerateUUIDStr() string {
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return UUIDToStr(GenerateUUID())
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}
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//生成符合v4标准的uuid
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func GenerateUUID_v4() (r [16]byte) {
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rand.Reader.Read(r[:])
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r[6] = (r[6] & 0x0f) | 0x40 // Version 4
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r[8] = (r[8] & 0x3f) | 0x80 // Variant is 10，（标准要求 "8", "9", "a", or "b"，我们是第十种）
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return
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}
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