Chore: project init

pkg/config/config.go

@@ -0,0 +1,48 @@
+package config
+
+import (
+	"os"
+	"strconv"
+
+	"github.com/joho/godotenv"
+)
+
+type Config struct {
+	AppPort        string
+	DBHost         string
+	DBPort         string
+	DBUser         string
+	DBPassword     string
+	DBName         string
+	RedisAddr      string
+	RedisPassword  string
+	JWTSecret      string
+	JWTExpiryHours int
+}
+
+var C Config
+
+func Load() {
+	_ = godotenv.Load()
+
+	hours, _ := strconv.Atoi(getEnv("JWT_EXPIRY_HOURS", "24"))
+	C = Config{
+		AppPort:        getEnv("APP_PORT", "8080"),
+		DBHost:         getEnv("DB_HOST", "localhost"),
+		DBPort:         getEnv("DB_PORT", "3306"),
+		DBUser:         getEnv("DB_USER", "root"),
+		DBPassword:     getEnv("DB_PASSWORD", ""),
+		DBName:         getEnv("DB_NAME", "a301"),
+		RedisAddr:      getEnv("REDIS_ADDR", "localhost:6379"),
+		RedisPassword:  getEnv("REDIS_PASSWORD", ""),
+		JWTSecret:      getEnv("JWT_SECRET", "secret"),
+		JWTExpiryHours: hours,
+	}
+}
+
+func getEnv(key, fallback string) string {
+	if v := os.Getenv(key); v != "" {
+		return v
+	}
+	return fallback
+}

pkg/database/mysql.go

@@ -0,0 +1,24 @@
+package database
+
+import (
+	"fmt"
+
+	"a301_server/pkg/config"
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+)
+
+var DB *gorm.DB
+
+func ConnectMySQL() error {
+	c := config.C
+	dsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8mb4&parseTime=True&loc=Local",
+		c.DBUser, c.DBPassword, c.DBHost, c.DBPort, c.DBName,
+	)
+	db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
+	if err != nil {
+		return err
+	}
+	DB = db
+	return nil
+}

pkg/database/redis.go

@@ -0,0 +1,18 @@
+package database
+
+import (
+	"context"
+
+	"a301_server/pkg/config"
+	"github.com/redis/go-redis/v9"
+)
+
+var RDB *redis.Client
+
+func ConnectRedis() error {
+	RDB = redis.NewClient(&redis.Options{
+		Addr:     config.C.RedisAddr,
+		Password: config.C.RedisPassword,
+	})
+	return RDB.Ping(context.Background()).Err()
+}

pkg/middleware/auth.go

@@ -0,0 +1,54 @@
+package middleware
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"a301_server/pkg/config"
+	"a301_server/pkg/database"
+	"github.com/gofiber/fiber/v2"
+	"github.com/golang-jwt/jwt/v5"
+)
+
+func Auth(c *fiber.Ctx) error {
+	header := c.Get("Authorization")
+	if !strings.HasPrefix(header, "Bearer ") {
+		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{"error": "인증이 필요합니다"})
+	}
+	tokenStr := strings.TrimPrefix(header, "Bearer ")
+
+	token, err := jwt.Parse(tokenStr, func(t *jwt.Token) (any, error) {
+		if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, fmt.Errorf("unexpected signing method")
+		}
+		return []byte(config.C.JWTSecret), nil
+	})
+	if err != nil || !token.Valid {
+		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{"error": "유효하지 않은 토큰입니다"})
+	}
+
+	claims := token.Claims.(jwt.MapClaims)
+	userID := uint(claims["user_id"].(float64))
+	username := claims["username"].(string)
+	role := claims["role"].(string)
+
+	// Redis 세션 확인
+	key := fmt.Sprintf("session:%d", userID)
+	stored, err := database.RDB.Get(context.Background(), key).Result()
+	if err != nil || stored != tokenStr {
+		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{"error": "만료되었거나 로그아웃된 세션입니다"})
+	}
+
+	c.Locals("userID", userID)
+	c.Locals("username", username)
+	c.Locals("role", role)
+	return c.Next()
+}
+
+func AdminOnly(c *fiber.Ctx) error {
+	if c.Locals("role") != "admin" {
+		return c.Status(fiber.StatusForbidden).JSON(fiber.Map{"error": "관리자 권한이 필요합니다"})
+	}
+	return c.Next()
+}