first commit

internal/middleware/ratelimit.go

@@ -0,0 +1,27 @@
+package middleware
+
+import (
+	"time"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v2/middleware/limiter"
+)
+
+// SetupRateLimit 设置限流中间件
+// 防止API滥用，限制每个IP的请求频率
+func SetupRateLimit(maxRequests int, expiration int) fiber.Handler {
+	return limiter.New(limiter.Config{
+		Max:        maxRequests,
+		Expiration: time.Duration(expiration) * time.Second, // 过期时间（秒）
+		KeyGenerator: func(c *fiber.Ctx) string {
+			return c.IP()
+		},
+		LimitReached: func(c *fiber.Ctx) error {
+			return c.Status(fiber.StatusTooManyRequests).JSON(fiber.Map{
+				"success": false,
+				"error":   "Rate limit exceeded",
+				"message": "Too many requests, please try again later",
+			})
+		},
+	})
+}