first commit

2026-04-26 21:46:42 +03:00
commit 2a5b661443
202 changed files with 49770 additions and 0 deletions
--- a/app/middlewares/auth_middleware.go
+++ b/app/middlewares/auth_middleware.go
@@ -0,0 +1,91 @@
+package middlewares
+
+import (
+	"net/http"
+	"strings"
+
+	configs "goGin/config"
+	"goGin/app/services"
+
+	"github.com/gin-gonic/gin"
+	"log"
+)
+
+const authClaimsKey = "auth_claims"
+
+func RequireAuth(c *gin.Context) {
+	authHeader := strings.TrimSpace(c.GetHeader("Authorization"))
+	if authHeader == "" {
+		authLogf("auth: missing Authorization header path=%s", c.Request.URL.Path)
+		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "authorization header is required"})
+		return
+	}
+
+	parts := strings.SplitN(authHeader, " ", 2)
+	if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") || strings.TrimSpace(parts[1]) == "" {
+		authLogf("auth: invalid authorization format path=%s header=%s", c.Request.URL.Path, authHeader)
+		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid authorization format, expected: Bearer <token>"})
+		return
+	}
+
+	jwtService := services.NewJWTService()
+	claims, err := jwtService.ValidateToken(strings.TrimSpace(parts[1]))
+	if err != nil {
+		authLogf("auth: invalid token path=%s error=%v", c.Request.URL.Path, err)
+		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid token"})
+		return
+	}
+	if claims.TokenType != services.TokenTypeAccess {
+		authLogf("auth: non-access token used path=%s token_type=%s", c.Request.URL.Path, claims.TokenType)
+		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "access token required"})
+		return
+	}
+
+	c.Set(authClaimsKey, claims)
+	c.Next()
+}
+
+func RequireAdmin(c *gin.Context) {
+	claims, ok := GetAuthClaims(c)
+	if !ok {
+		authLogf("auth: RequireAdmin missing claims path=%s", c.Request.URL.Path)
+		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+		return
+	}
+	if !claims.IsAdmin {
+		authLogf("auth: RequireAdmin forbidden path=%s user_id=%v", c.Request.URL.Path, claims.UserID)
+		c.AbortWithStatusJSON(http.StatusForbidden, gin.H{"error": "admin role required"})
+		return
+	}
+	c.Next()
+}
+
+func RequireNormalUser(c *gin.Context) {
+	claims, ok := GetAuthClaims(c)
+	if !ok {
+		authLogf("auth: RequireNormalUser missing claims path=%s", c.Request.URL.Path)
+		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+		return
+	}
+	if claims.IsAdmin {
+		authLogf("auth: RequireNormalUser forbidden (admin tried to access) path=%s user_id=%v", c.Request.URL.Path, claims.UserID)
+		c.AbortWithStatusJSON(http.StatusForbidden, gin.H{"error": "only normal users can access this endpoint"})
+		return
+	}
+	c.Next()
+}
+
+func GetAuthClaims(c *gin.Context) (*services.JWTClaim, bool) {
+	raw, exists := c.Get(authClaimsKey)
+	if !exists {
+		return nil, false
+	}
+	claims, ok := raw.(*services.JWTClaim)
+	return claims, ok
+}
+
+func authLogf(format string, args ...interface{}) {
+	if configs.AppConfig != nil && configs.AppConfig.Debug {
+		log.Printf(format, args...)
+	}
+}
--- a/app/middlewares/dynamic_cors.go
+++ b/app/middlewares/dynamic_cors.go
@@ -0,0 +1,154 @@
+package middlewares
+
+import (
+	"encoding/json"
+	"errors"
+	configs "goGin/config"
+	database "goGin/app/database/config"
+	"goGin/app/database/models"
+	"log"
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/redis/go-redis/v9"
+)
+
+const (
+	corsWhitelistActiveCacheKey = "cors:active:whitelist"
+	corsBlacklistActiveCacheKey = "cors:active:blacklist"
+	corsCacheTTLSeconds         = 60
+)
+
+var (
+	allowedMethods = "GET,POST,PUT,PATCH,DELETE,OPTIONS"
+	allowedHeaders = "Authorization,Content-Type,Accept,Origin,X-Requested-With"
+)
+
+// DynamicCORS validates request Origin using DB-backed whitelist/blacklist with Redis caching.
+func DynamicCORS() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		origin := strings.TrimSpace(c.GetHeader("Origin"))
+		if origin == "" {
+			c.Next()
+			return
+		}
+		if database.DB == nil {
+			corsLogf("[cors][skip] database unavailable origin=%s path=%s", origin, c.Request.URL.Path)
+			c.Next()
+			return
+		}
+
+		originKey := strings.ToLower(origin)
+		// Keep same-origin requests working even if DB entries are missing.
+		if origin == requestBaseURL(c) {
+			corsLogf("[cors][allow] same-origin origin=%s path=%s", origin, c.Request.URL.Path)
+			setCORSHeaders(c, origin)
+			if c.Request.Method == http.MethodOptions {
+				c.AbortWithStatus(http.StatusNoContent)
+				return
+			}
+			c.Next()
+			return
+		}
+
+		blacklist, err := loadActiveOriginSet(corsBlacklistActiveCacheKey, true)
+		if err != nil {
+			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"error": "cors blacklist lookup failed"})
+			return
+		}
+		if blacklist[originKey] {
+			log.Printf("[cors][blocked] blacklist origin=%s path=%s", origin, c.Request.URL.Path)
+			c.AbortWithStatusJSON(http.StatusForbidden, gin.H{"error": "origin is blocked by CORS policy"})
+			return
+		}
+
+		whitelist, err := loadActiveOriginSet(corsWhitelistActiveCacheKey, false)
+		if err != nil {
+			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"error": "cors whitelist lookup failed"})
+			return
+		}
+		if !whitelist[originKey] {
+			log.Printf("[cors][blocked] not-whitelisted origin=%s path=%s", origin, c.Request.URL.Path)
+			c.AbortWithStatusJSON(http.StatusForbidden, gin.H{"error": "origin is not allowed by CORS policy"})
+			return
+		}
+
+		corsLogf("[cors][allow] origin=%s path=%s", origin, c.Request.URL.Path)
+		setCORSHeaders(c, origin)
+		if c.Request.Method == http.MethodOptions {
+			c.AbortWithStatus(http.StatusNoContent)
+			return
+		}
+		c.Next()
+	}
+}
+
+func setCORSHeaders(c *gin.Context, origin string) {
+	c.Header("Vary", "Origin")
+	c.Header("Access-Control-Allow-Origin", origin)
+	c.Header("Access-Control-Allow-Methods", allowedMethods)
+	c.Header("Access-Control-Allow-Headers", allowedHeaders)
+	c.Header("Access-Control-Allow-Credentials", "true")
+	c.Header("Access-Control-Max-Age", "600")
+}
+
+func requestBaseURL(c *gin.Context) string {
+	scheme := c.Request.Header.Get("X-Forwarded-Proto")
+	if scheme == "" {
+		if c.Request.TLS != nil {
+			scheme = "https"
+		} else {
+			scheme = "http"
+		}
+	}
+	return scheme + "://" + c.Request.Host
+}
+
+func loadActiveOriginSet(cacheKey string, isBlacklist bool) (map[string]bool, error) {
+	out := make(map[string]bool)
+
+	if cached, err := database.Get(cacheKey); err == nil {
+		corsLogf("[cors][cache-hit] key=%s", cacheKey)
+		var origins []string
+		if jsonErr := json.Unmarshal([]byte(cached), &origins); jsonErr == nil {
+			for _, origin := range origins {
+				out[strings.ToLower(strings.TrimSpace(origin))] = true
+			}
+			return out, nil
+		}
+	} else if !errors.Is(err, redis.Nil) {
+		return nil, err
+	}
+	corsLogf("[cors][cache-miss] key=%s", cacheKey)
+
+	var origins []string
+	var dbErr error
+	if isBlacklist {
+		dbErr = database.DB.Model(&models.CorsBlacklist{}).
+			Where("is_active = ?", true).
+			Pluck("origin", &origins).Error
+	} else {
+		dbErr = database.DB.Model(&models.CorsWhitelist{}).
+			Where("is_active = ?", true).
+			Pluck("origin", &origins).Error
+	}
+	if dbErr != nil {
+		return nil, dbErr
+	}
+
+	for _, origin := range origins {
+		out[strings.ToLower(strings.TrimSpace(origin))] = true
+	}
+
+	cacheBytes, _ := json.Marshal(origins)
+	_ = database.SetEx(cacheKey, string(cacheBytes), corsCacheTTLSeconds)
+
+	return out, nil
+}
+
+func corsLogf(format string, args ...interface{}) {
+	if configs.AppConfig != nil && (configs.AppConfig.Debug || configs.AppConfig.CorsDebug) {
+		log.Printf(format, args...)
+	}
+}
--- a/app/middlewares/rate_limit.go
+++ b/app/middlewares/rate_limit.go
@@ -0,0 +1,128 @@
+package middlewares
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	configs "goGin/config"
+	database "goGin/app/database/config"
+	"goGin/app/database/models"
+	"log"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/redis/go-redis/v9"
+	"gorm.io/gorm"
+)
+
+type rateLimitRuntime struct {
+	Name          string `json:"name"`
+	MaxRequests   int64  `json:"max_requests"`
+	WindowSeconds int    `json:"window_seconds"`
+	IsActive      bool   `json:"is_active"`
+}
+
+// RequireRateLimit applies Redis-backed per-IP rate limiting by setting name.
+func RequireRateLimit(name string, fallbackMax int64, fallbackWindowSeconds int) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if database.DB == nil {
+			c.Next()
+			return
+		}
+
+		setting, err := loadRateLimitRuntime(name, fallbackMax, fallbackWindowSeconds)
+		if err != nil {
+			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"error": "rate limit configuration error"})
+			return
+		}
+		if !setting.IsActive {
+			c.Next()
+			return
+		}
+		if database.RedisClient == nil {
+			rateLimitLogf("[rate-limit][warn] redis unavailable, skipping enforcement name=%s", setting.Name)
+			c.Next()
+			return
+		}
+
+		ip := strings.TrimSpace(c.ClientIP())
+		if ip == "" {
+			ip = "unknown"
+		}
+
+		counterKey := fmt.Sprintf("ratelimit:%s:%s", setting.Name, ip)
+		count, err := database.RedisClient.Incr(context.Background(), counterKey).Result()
+		if err != nil {
+			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"error": "rate limit check failed"})
+			return
+		}
+		if count == 1 {
+			_ = database.RedisClient.Expire(context.Background(), counterKey, time.Duration(setting.WindowSeconds)*time.Second).Err()
+		}
+
+		if count > setting.MaxRequests {
+			ttl, _ := database.RedisClient.TTL(context.Background(), counterKey).Result()
+			retryAfter := int(ttl.Seconds())
+			if retryAfter < 1 {
+				retryAfter = setting.WindowSeconds
+			}
+			c.Header("Retry-After", strconv.Itoa(retryAfter))
+			log.Printf("[rate-limit][blocked] name=%s ip=%s count=%d max=%d window=%ds", setting.Name, ip, count, setting.MaxRequests, setting.WindowSeconds)
+			c.AbortWithStatusJSON(http.StatusTooManyRequests, gin.H{
+				"error":       "too many requests",
+				"retry_after": retryAfter,
+			})
+			return
+		}
+
+		rateLimitLogf("[rate-limit][allow] name=%s ip=%s count=%d max=%d window=%ds", setting.Name, ip, count, setting.MaxRequests, setting.WindowSeconds)
+		c.Next()
+	}
+}
+
+func loadRateLimitRuntime(name string, fallbackMax int64, fallbackWindowSeconds int) (*rateLimitRuntime, error) {
+	cacheKey := "ratelimit:setting:" + name
+	if cached, err := database.Get(cacheKey); err == nil {
+		var s rateLimitRuntime
+		if jsonErr := json.Unmarshal([]byte(cached), &s); jsonErr == nil {
+			return &s, nil
+		}
+	} else if !errors.Is(err, redis.Nil) {
+		return nil, err
+	}
+
+	setting := &rateLimitRuntime{
+		Name:          name,
+		MaxRequests:   fallbackMax,
+		WindowSeconds: fallbackWindowSeconds,
+		IsActive:      true,
+	}
+
+	var dbSetting models.RateLimitSetting
+	if err := database.DB.Where("name = ?", name).First(&dbSetting).Error; err != nil {
+		if !errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, err
+		}
+		rateLimitLogf("[rate-limit][config] setting=%s not found, using fallback max=%d window=%ds", name, fallbackMax, fallbackWindowSeconds)
+	} else {
+		setting.MaxRequests = dbSetting.MaxRequests
+		setting.WindowSeconds = dbSetting.WindowSeconds
+		setting.IsActive = dbSetting.IsActive
+		rateLimitLogf("[rate-limit][config] loaded from db name=%s active=%t max=%d window=%ds", name, setting.IsActive, setting.MaxRequests, setting.WindowSeconds)
+	}
+
+	cacheJSON, _ := json.Marshal(setting)
+	_ = database.SetEx(cacheKey, string(cacheJSON), 60)
+
+	return setting, nil
+}
+
+func rateLimitLogf(format string, args ...interface{}) {
+	if configs.AppConfig != nil && (configs.AppConfig.Debug || configs.AppConfig.CorsDebug) {
+		log.Printf(format, args...)
+	}
+}