65 lines
1.2 KiB
Go
65 lines
1.2 KiB
Go
package id
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import (
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"bytes"
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"crypto/rand"
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"encoding/hex"
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"fmt"
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"net"
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"os"
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"sync"
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"time"
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)
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var (
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ipInstance string
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ipOnce sync.Once
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ipMu sync.RWMutex
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)
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func getLocalIP() string {
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ipOnce.Do(func() {
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ip := "127.0.0.1"
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addrs, err := net.InterfaceAddrs()
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if err == nil {
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for _, a := range addrs {
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if ipnet, ok := a.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
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if ipnet.IP.To4() != nil {
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ip = ipnet.IP.String()
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break
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}
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}
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}
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}
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ipMu.Lock()
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ipInstance = ip
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ipMu.Unlock()
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})
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ipMu.RLock()
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defer ipMu.RUnlock()
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return ipInstance
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}
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func GenLogID() string {
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ip := getLocalIP()
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now := time.Now()
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timeNano := now.UnixNano()
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pid := os.Getpid()
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randomBytes := make([]byte, 3)
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if _, err := rand.Read(randomBytes); err != nil {
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randomBytes = []byte{byte(timeNano), byte(timeNano >> 8), byte(pid)}
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}
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b := bytes.Buffer{}
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b.WriteString(hex.EncodeToString(net.ParseIP(ip).To4()))
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b.WriteString(fmt.Sprintf("%x", now.Unix()&0xffffffff))
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b.WriteString(fmt.Sprintf("%04x", timeNano&0xffff))
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b.WriteString(fmt.Sprintf("%04x", pid&0xffff))
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b.WriteString(hex.EncodeToString(randomBytes))
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b.WriteString("b0")
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return b.String()
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}
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