V2

V2/libs/string.go

@@ -0,0 +1,69 @@
+/**********************************************
+** @Des: This file ...
+** @Author: haodaquan
+** @Date:   2017-09-08 00:24:25
+** @Last Modified by:   haodaquan
+** @Last Modified time: 2017-09-17 10:12:06
+***********************************************/
+
+package libs
+
+import (
+	"crypto/md5"
+	"fmt"
+	"math/rand"
+	"regexp"
+	"time"
+)
+
+var emailPattern = regexp.MustCompile("[\\w!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\w!#$%&'*+/=?^_`{|}~-]+)*@(?:[\\w](?:[\\w-]*[\\w])?\\.)+[a-zA-Z0-9](?:[\\w-]*[\\w])?")
+
+func Md5(buf []byte) string {
+	hash := md5.New()
+	hash.Write(buf)
+	return fmt.Sprintf("%x", hash.Sum(nil))
+}
+
+func SizeFormat(size float64) string {
+	units := []string{"Byte", "KB", "MB", "GB", "TB"}
+	n := 0
+	for size > 1024 {
+		size /= 1024
+		n += 1
+	}
+
+	return fmt.Sprintf("%.2f %s", size, units[n])
+}
+
+func IsEmail(b []byte) bool {
+	return emailPattern.Match(b)
+}
+
+func Password(len int, pwdO string) (pwd string, salt string) {
+	salt = GetRandomString(4)
+	defaultPwd := "george518"
+	if pwdO != "" {
+		defaultPwd = pwdO
+	}
+	pwd = Md5([]byte(defaultPwd + salt))
+	return pwd, salt
+}
+
+// 生成32位MD5
+// func MD5(text string) string{
+//    ctx := md5.New()
+//    ctx.Write([]byte(text))
+//    return hex.EncodeToString(ctx.Sum(nil))
+// }
+
+//生成随机字符串
+func GetRandomString(lens int) string {
+	str := "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	bytes := []byte(str)
+	result := []byte{}
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < lens; i++ {
+		result = append(result, bytes[r.Intn(len(bytes))])
+	}
+	return string(result)
+}