tolelom
0dfa744c16
- middleware(Auth, Idempotency)를 클로저 팩토리 패턴으로 DI 전환 - database.DB/RDB 전역 변수 제거, ConnectMySQL/Redis 값 반환으로 변경 - download API X-API-Version 헤더 + 하위 호환성 규칙 문서화 - SaveGameData PlayTimeDelta 원자적 UPDATE (race condition 해소) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
90 lines
2.6 KiB
Go
90 lines
2.6 KiB
Go
package middleware
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import (
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"context"
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"crypto/subtle"
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"fmt"
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"log"
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"strings"
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"a301_server/pkg/apperror"
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"github.com/gofiber/fiber/v2"
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"github.com/golang-jwt/jwt/v5"
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"github.com/redis/go-redis/v9"
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)
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// Auth returns a middleware that validates JWT tokens and checks Redis sessions.
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func Auth(rdb *redis.Client, jwtSecret string) fiber.Handler {
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secretBytes := []byte(jwtSecret)
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return func(c *fiber.Ctx) error {
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header := c.Get("Authorization")
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if !strings.HasPrefix(header, "Bearer ") {
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return apperror.ErrUnauthorized
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}
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tokenStr := strings.TrimPrefix(header, "Bearer ")
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token, err := jwt.Parse(tokenStr, func(t *jwt.Token) (any, error) {
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if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method")
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}
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return secretBytes, nil
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})
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if err != nil || !token.Valid {
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return apperror.Unauthorized("유효하지 않은 토큰입니다")
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}
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claims, ok := token.Claims.(jwt.MapClaims)
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if !ok {
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return apperror.Unauthorized("유효하지 않은 토큰입니다")
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}
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userIDFloat, ok := claims["user_id"].(float64)
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if !ok {
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return apperror.Unauthorized("유효하지 않은 토큰입니다")
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}
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username, ok := claims["username"].(string)
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if !ok {
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return apperror.Unauthorized("유효하지 않은 토큰입니다")
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}
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role, ok := claims["role"].(string)
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if !ok {
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return apperror.Unauthorized("유효하지 않은 토큰입니다")
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}
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userID := uint(userIDFloat)
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// Redis 세션 확인
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ctx, cancel := context.WithTimeout(context.Background(), redisTimeout)
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defer cancel()
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key := fmt.Sprintf("session:%d", userID)
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stored, err := rdb.Get(ctx, key).Result()
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if err != nil || stored != tokenStr {
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return apperror.Unauthorized("만료되었거나 로그아웃된 세션입니다")
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}
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c.Locals("userID", userID)
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c.Locals("username", username)
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c.Locals("role", role)
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return c.Next()
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}
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}
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func AdminOnly(c *fiber.Ctx) error {
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if c.Locals("role") != "admin" {
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return apperror.ErrForbidden
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}
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return c.Next()
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}
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// ServerAuth returns a middleware that validates X-API-Key header for server-to-server communication.
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// Uses constant-time comparison to prevent timing attacks.
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func ServerAuth(apiKey string) fiber.Handler {
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expectedBytes := []byte(apiKey)
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return func(c *fiber.Ctx) error {
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key := c.Get("X-API-Key")
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if key == "" || len(expectedBytes) == 0 || subtle.ConstantTimeCompare([]byte(key), expectedBytes) != 1 {
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log.Printf("ServerAuth 실패: IP=%s, Path=%s", c.IP(), c.Path())
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return apperror.Unauthorized("유효하지 않은 API 키입니다")
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}
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return c.Next()
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}
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}
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