initial commit

server/internal/utils/jwt.go

@@ -0,0 +1,80 @@
+package utils
+
+import (
+	"errors"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+var (
+	ErrInvalidToken = errors.New("invalid token")
+	ErrExpiredToken = errors.New("token has expired")
+)
+
+// Claims JWT 声明
+type Claims struct {
+	UserID   uint   `json:"user_id"`
+	Username string `json:"username"`
+	Role     string `json:"role"`
+	jwt.RegisteredClaims
+}
+
+// JWTConfig JWT 配置
+type JWTConfig struct {
+	Secret     string
+	ExpireTime int // 过期时间（小时）
+}
+
+// JWTManager JWT 管理器
+type JWTManager struct {
+	config JWTConfig
+}
+
+// NewJWTManager 创建 JWT 管理器
+func NewJWTManager(secret string, expireTime int) *JWTManager {
+	return &JWTManager{
+		config: JWTConfig{
+			Secret:     secret,
+			ExpireTime: expireTime,
+		},
+	}
+}
+
+// GenerateToken 生成 JWT Token
+func (m *JWTManager) GenerateToken(userID uint, username, role string) (string, error) {
+	claims := &Claims{
+		UserID:   userID,
+		Username: username,
+		Role:     role,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Duration(m.config.ExpireTime) * time.Hour)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+			NotBefore: jwt.NewNumericDate(time.Now()),
+			Issuer:    "novablog",
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(m.config.Secret))
+}
+
+// ParseToken 解析 JWT Token
+func (m *JWTManager) ParseToken(tokenString string) (*Claims, error) {
+	token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
+		return []byte(m.config.Secret), nil
+	})
+
+	if err != nil {
+		if errors.Is(err, jwt.ErrTokenExpired) {
+			return nil, ErrExpiredToken
+		}
+		return nil, ErrInvalidToken
+	}
+
+	if claims, ok := token.Claims.(*Claims); ok && token.Valid {
+		return claims, nil
+	}
+
+	return nil, ErrInvalidToken
+}