internal/middleware/auth_middleware.go - main - Arsinenko/CompClubAPI_Go

internal/middleware/auth_middleware.go
115 строк3 KB
Arsinenko
Club handler
06 окт 2025, 16:53
06 окт 2025, 16:53e0961e8
// middleware/auth_middleware.go

package middleware

import (
	"fmt"
	"net/http"
	"strings"

	"github.com/gin-gonic/gin"
	"github.com/golang-jwt/jwt"
)

const (
	Admin  = "admin"
	Client = "client"
)

// AuthMiddleware проверяет JWT токен и добавляет информацию о пользователе в контекст
func AuthMiddleware(jwtMiddleware JwtMiddleware) gin.HandlerFunc {
	return func(c *gin.Context) {
		authHeader := c.GetHeader("Authorization")
		if authHeader == "" {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header is required"})
			c.Abort()
			return
		}

		// Формат: Bearer <token>
		parts := strings.Fields(authHeader)
		if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header format must be Bearer {token}"})
			c.Abort()
			return
		}

		token, err := jwtMiddleware.VerifyToken(parts[1])
		if err != nil {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token: " + err.Error()})
			c.Abort()
			return
		}

		claims, err := jwtMiddleware.GetClaims(token)
		if err != nil {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token claims: " + err.Error()})
			c.Abort()
			return
		}

		// Добавляем login в контекст для использования в следующих middleware/handlers
		if login, ok := claims["login"].(string); ok {
			c.Set("userLogin", login)
		}
		c.Next()
	}
}

// AdminMiddleware проверяет, что пользователь имеет роль admin
func AdminMiddleware(jwtMiddleware JwtMiddleware) gin.HandlerFunc {
	return func(c *gin.Context) {
		authHeader := c.GetHeader("Authorization")
		if authHeader == "" {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header is required"})
			c.Abort()
			return
		}

		parts := strings.Fields(authHeader)
		if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header format must be Bearer {token}"})
			c.Abort()
			return
		}

		tokenStr := parts[1]

		// Парсим токен для получения роли
		token, err := jwt.Parse(tokenStr, func(token *jwt.Token) (interface{}, error) {
			if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
				return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
			}
			return []byte(jwtMiddleware.GetSecretKey()), nil
		})

		if err != nil || !token.Valid {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token"})
			c.Abort()
			return
		}

		claims, ok := token.Claims.(jwt.MapClaims)
		if !ok {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token claims"})
			c.Abort()
			return
		}

		// Проверяем роль
		role, ok := claims["role"].(string)
		if !ok || role != Admin {
			c.JSON(http.StatusForbidden, gin.H{"error": "Admin access required"})
			c.Abort()
			return
		}

		// Добавляем информацию в контекст
		if login, ok := claims["login"].(string); ok {
			c.Set("userLogin", login)
		}
		c.Set("userRole", role)

		c.Next()
	}
}