Fix: Add CORS support for management API OPTIONS requests

cmd/s3-balance/main.go

@@ -137,8 +137,9 @@ func main() {
 		log.Println("Management API enabled")
 		adminHandler := api.NewAdminHandler(bucketManager, lb, cfg)
 
-		// 创建子路由器并应用Token认证中间件
+		// 创建子路由器并应用中间件
 		apiRouter := router.PathPrefix("/api").Subrouter()
+		apiRouter.Use(corsMiddleware) // 先应用 CORS 中间件，处理 OPTIONS 预检请求
 		apiRouter.Use(middleware.TokenAuthMiddleware(cfg.API.Token))
 		adminHandler.RegisterRoutes(apiRouter)
 

internal/api/admin_handler.go

@@ -73,9 +73,10 @@ type HealthResponse struct {
 // RegisterRoutes 注册管理API路由
 // 注意: router 参数应该是已经带有 /api 前缀的子路由器
 func (h *AdminHandler) RegisterRoutes(router *mux.Router) {
-	router.HandleFunc("/buckets", h.ListBuckets).Methods(http.MethodGet)
+	// 注册路由，同时支持 OPTIONS 方法用于 CORS 预检
-	router.HandleFunc("/buckets/{name}", h.GetBucketDetail).Methods(http.MethodGet)
+	router.HandleFunc("/buckets", h.ListBuckets).Methods(http.MethodGet, http.MethodOptions)
-	router.HandleFunc("/health", h.GetHealth).Methods(http.MethodGet)
+	router.HandleFunc("/buckets/{name}", h.GetBucketDetail).Methods(http.MethodGet, http.MethodOptions)
+	router.HandleFunc("/health", h.GetHealth).Methods(http.MethodGet, http.MethodOptions)
 }
 
 // ListBuckets 获取存储桶列表