feat():learning后台管理项目初始化

pkg/utils/jwt.go

@@ -0,0 +1,80 @@
+package utils
+
+import (
+	"errors"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+// JWTClaims JWT声明
+type JWTClaims struct {
+	UserID   uint   `json:"user_id"`
+	Username string `json:"username"`
+	Role     string `json:"role"`
+	jwt.RegisteredClaims
+}
+
+// JWTManager JWT管理器
+type JWTManager struct {
+	secretKey string
+}
+
+// NewJWTManager 创建JWT管理器
+func NewJWTManager(secretKey string) *JWTManager {
+	return &JWTManager{
+		secretKey: secretKey,
+	}
+}
+
+// GenerateToken 生成JWT token
+func (j *JWTManager) GenerateToken(userID uint, username string) (string, error) {
+	claims := JWTClaims{
+		UserID:   userID,
+		Username: username,
+		Role:     "", // 不再使用role字段
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+			NotBefore: jwt.NewNumericDate(time.Now()),
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(j.secretKey))
+}
+
+// ParseToken 解析JWT token
+func (j *JWTManager) ParseToken(tokenString string) (*JWTClaims, error) {
+	token, err := jwt.ParseWithClaims(tokenString, &JWTClaims{}, func(token *jwt.Token) (interface{}, error) {
+		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, errors.New("unexpected signing method")
+		}
+		return []byte(j.secretKey), nil
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	if claims, ok := token.Claims.(*JWTClaims); ok && token.Valid {
+		return claims, nil
+	}
+
+	return nil, errors.New("invalid token")
+}
+
+// RefreshToken 刷新token
+func (j *JWTManager) RefreshToken(tokenString string) (string, error) {
+	claims, err := j.ParseToken(tokenString)
+	if err != nil {
+		return "", err
+	}
+
+	// 检查token是否即将过期（剩余时间少于1小时）
+	if time.Until(claims.ExpiresAt.Time) < time.Hour {
+		return j.GenerateToken(claims.UserID, claims.Username)
+	}
+
+	return tokenString, nil
+}