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utils.go
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utils.go
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package utils
import (
"crypto/md5"
"crypto/rand"
"fmt"
"math/big"
"os"
"regexp"
"strings"
jsoniter "github.com/json-iterator/go"
)
var Json = jsoniter.ConfigCompatibleWithStandardLibrary
func IsWindows() bool {
return os.PathSeparator == '\\' && os.PathListSeparator == ';'
}
var ipv4Re = regexp.MustCompile(`(\d*\.).*(\.\d*)`)
func ipv4Desensitize(ipv4Addr string) string {
return ipv4Re.ReplaceAllString(ipv4Addr, "$1****$2")
}
var ipv6Re = regexp.MustCompile(`(\w*:\w*:).*(:\w*:\w*)`)
func ipv6Desensitize(ipv6Addr string) string {
return ipv6Re.ReplaceAllString(ipv6Addr, "$1****$2")
}
func IPDesensitize(ipAddr string) string {
ipAddr = ipv4Desensitize(ipAddr)
ipAddr = ipv6Desensitize(ipAddr)
return ipAddr
}
// SplitIPAddr 传入/分割的v4v6混合地址,返回v4和v6地址与有效地址
func SplitIPAddr(v4v6Bundle string) (string, string, string) {
ipList := strings.Split(v4v6Bundle, "/")
ipv4 := ""
ipv6 := ""
validIP := ""
if len(ipList) > 1 {
// 双栈
ipv4 = ipList[0]
ipv6 = ipList[1]
validIP = ipv4
} else if len(ipList) == 1 {
// 仅ipv4|ipv6
if strings.Contains(ipList[0], ":") {
ipv6 = ipList[0]
validIP = ipv6
} else {
ipv4 = ipList[0]
validIP = ipv4
}
}
return ipv4, ipv6, validIP
}
func IsFileExists(path string) bool {
_, err := os.Stat(path)
return err == nil
}
func GenerateRandomString(n int) (string, error) {
const letters = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
lettersLength := big.NewInt(int64(len(letters)))
ret := make([]byte, n)
for i := 0; i < n; i++ {
num, err := rand.Int(rand.Reader, lettersLength)
if err != nil {
return "", err
}
ret[i] = letters[num.Int64()]
}
return string(ret), nil
}
func Md5Byte(buf []byte) string {
hash := md5.New()
hash.Write(buf)
return fmt.Sprintf("%x", hash.Sum(nil))
}
func Md5(s string) string {
return Md5Byte([]byte(s))
}