项目初始化

internal/api/middleware/limit.go

@@ -0,0 +1,52 @@
+package middleware
+
+import (
+	"FileRelay/internal/config"
+	"FileRelay/internal/model"
+	"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) {
+		ip := c.ClientIP()
+		code := c.Param("pickup_code")
+		key := ip + ":" + code
+
+		failureMutex.Lock()
+		count, exists := pickupFailures[key]
+		failureMutex.Unlock()
+
+		if exists && count >= config.GlobalConfig.Security.PickupFailLimit {
+			c.JSON(http.StatusTooManyRequests, model.ErrorResponse(http.StatusTooManyRequests, "Too many failed attempts. Please try again later."))
+			c.Abort()
+			return
+		}
+
+		c.Next()
+	}
+}
+
+func RecordPickupFailure(ip, code string) {
+	key := ip + ":" + code
+	failureMutex.Lock()
+	pickupFailures[key]++
+
+	// 设置 1 小时后清除记录 (简单实现)
+	go func() {
+		time.Sleep(1 * time.Hour)
+		failureMutex.Lock()
+		delete(pickupFailures, key)
+		failureMutex.Unlock()
+	}()
+
+	failureMutex.Unlock()
+}