Initial commit

internal/api/middleware/limit.go

@@ -0,0 +1,56 @@
+package middleware
+
+import (
+	"FileRelay/internal/config"
+	"FileRelay/internal/model"
+	"log/slog"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+var (
+	pickupFailures = make(map[string]int)
+	failureMutex   sync.Mutex
+)
+
+func PickupRateLimit() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		key := c.ClientIP()
+
+		failureMutex.Lock()
+		count, exists := pickupFailures[key]
+		failureMutex.Unlock()
+
+		if exists && count >= config.GlobalConfig.Security.PickupFailLimit {
+			slog.Warn("Pickup rate limit exceeded", "ip", key, "count", count)
+			c.JSON(http.StatusTooManyRequests, model.ErrorResponse(model.CodeTooManyRequests, "Too many failed attempts. Please try again later."))
+			c.Abort()
+			return
+		}
+
+		c.Next()
+	}
+}
+
+func RecordPickupFailure(ip string) {
+	key := ip
+	failureMutex.Lock()
+	pickupFailures[key]++
+
+	// 仅在第一次失败时启动清除记录的计时器
+	if pickupFailures[key] == 1 {
+		go func() {
+			// 设置 1 分钟后清除记录 (简单实现)
+			time.Sleep(1 * time.Hour)
+			failureMutex.Lock()
+			delete(pickupFailures, key)
+			slog.Info("Pickup failure record cleared", "ip", key)
+			failureMutex.Unlock()
+		}()
+	}
+
+	failureMutex.Unlock()
+}