updateauth

middleware/auth.go

@@ -0,0 +1,123 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+	"time"
+
+	"res_db/db/entity"
+
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
+	"golang.org/x/crypto/bcrypt"
+)
+
+var jwtSecret = []byte("your-secret-key")
+
+// Claims JWT声明
+type Claims struct {
+	UserID   uint   `json:"user_id"`
+	Username string `json:"username"`
+	Role     string `json:"role"`
+	jwt.RegisteredClaims
+}
+
+// AuthMiddleware 认证中间件
+func AuthMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "未提供认证令牌"})
+			c.Abort()
+			return
+		}
+
+		// 检查Bearer前缀
+		if !strings.HasPrefix(authHeader, "Bearer ") {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "无效的认证格式"})
+			c.Abort()
+			return
+		}
+
+		tokenString := strings.TrimPrefix(authHeader, "Bearer ")
+		claims, err := parseToken(tokenString)
+		if err != nil {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "无效的令牌"})
+			c.Abort()
+			return
+		}
+
+		// 将用户信息存储到上下文中
+		c.Set("user_id", claims.UserID)
+		c.Set("username", claims.Username)
+		c.Set("role", claims.Role)
+
+		c.Next()
+	}
+}
+
+// AdminMiddleware 管理员中间件
+func AdminMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		role, exists := c.Get("role")
+		if !exists {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "未认证"})
+			c.Abort()
+			return
+		}
+
+		if role != "admin" {
+			c.JSON(http.StatusForbidden, gin.H{"error": "需要管理员权限"})
+			c.Abort()
+			return
+		}
+
+		c.Next()
+	}
+}
+
+// GenerateToken 生成JWT令牌
+func GenerateToken(user *entity.User) (string, error) {
+	claims := Claims{
+		UserID:   user.ID,
+		Username: user.Username,
+		Role:     user.Role,
+		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(jwtSecret)
+}
+
+// parseToken 解析JWT令牌
+func parseToken(tokenString string) (*Claims, error) {
+	token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
+		return jwtSecret, nil
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	if claims, ok := token.Claims.(*Claims); ok && token.Valid {
+		return claims, nil
+	}
+
+	return nil, jwt.ErrSignatureInvalid
+}
+
+// HashPassword 哈希密码
+func HashPassword(password string) (string, error) {
+	bytes, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	return string(bytes), err
+}
+
+// CheckPassword 检查密码
+func CheckPassword(password, hash string) bool {
+	err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
+	return err == nil
+}