完成基础功能

utils/crypto.go

@@ -6,6 +6,7 @@ import (
 	"encoding/base64"
 	"fmt"
 	"log"
+	randa "math/rand"
 	"time"
 
 	"golang.org/x/crypto/bcrypt"
@@ -54,3 +55,18 @@ func (*Crypto) GenerateStateToken(tokenLength int) (string, error) {
 	token := base64.URLEncoding.EncodeToString(hash[:])
 	return token, nil
 }
+
+func (*Crypto) GetRandString(length int) string {
+	// 初始化随机数种子
+	randa.Seed(time.Now().UnixNano())
+
+	const letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+
+	// 方法1: 使用字节切片
+	b := make([]byte, length)
+	for i := range b {
+		b[i] = letters[randa.Intn(len(letters))] // 随机选取一个字符
+	}
+	randomString := string(b)
+	return randomString
+}