70 lines
1.5 KiB
Go
70 lines
1.5 KiB
Go
/**********************************************
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** @Des: This file ...
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** @Author: haodaquan
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** @Date: 2017-09-08 00:24:25
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** @Last Modified by: haodaquan
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** @Last Modified time: 2017-09-17 10:12:06
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***********************************************/
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package libs
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import (
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"crypto/md5"
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"fmt"
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"math/rand"
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"regexp"
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"time"
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)
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var emailPattern = regexp.MustCompile("[\\w!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\w!#$%&'*+/=?^_`{|}~-]+)*@(?:[\\w](?:[\\w-]*[\\w])?\\.)+[a-zA-Z0-9](?:[\\w-]*[\\w])?")
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func Md5(buf []byte) string {
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hash := md5.New()
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hash.Write(buf)
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return fmt.Sprintf("%x", hash.Sum(nil))
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}
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func SizeFormat(size float64) string {
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units := []string{"Byte", "KB", "MB", "GB", "TB"}
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n := 0
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for size > 1024 {
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size /= 1024
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n += 1
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}
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return fmt.Sprintf("%.2f %s", size, units[n])
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}
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func IsEmail(b []byte) bool {
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return emailPattern.Match(b)
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}
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func Password(len int, pwdO string) (pwd string, salt string) {
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salt = GetRandomString(4)
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defaultPwd := "george518"
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if pwdO != "" {
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defaultPwd = pwdO
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}
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pwd = Md5([]byte(defaultPwd + salt))
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return pwd, salt
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}
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// 生成32位MD5
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// func MD5(text string) string{
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// ctx := md5.New()
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// ctx.Write([]byte(text))
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// return hex.EncodeToString(ctx.Sum(nil))
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// }
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//生成随机字符串
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func GetRandomString(lens int) string {
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str := "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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bytes := []byte(str)
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result := []byte{}
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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for i := 0; i < lens; i++ {
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result = append(result, bytes[r.Intn(len(bytes))])
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}
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return string(result)
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}
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