// high memory usage!
func s3APIMiddleware(f http.HandlerFunc, flags ...s3HFlag) http.HandlerFunc {
	// Collect all flags with bitwise-OR and assign operator
	var handlerFlags s3HFlag
	for _, flag := range flags {
		handlerFlags |= flag
	}

	// Get name of the handler using reflection.
	handlerName := getHandlerName(f, "objectAPIHandlers")

	var handler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {

		adminRouter.Methods(http.MethodDelete).Path(adminVersion + "/tier/{tier}").HandlerFunc(adminMiddleware(adminAPI.RemoveTierHandler))
		adminRouter.Methods(http.MethodGet).Path(adminVersion + "/tier/{tier}").HandlerFunc(adminMiddleware(adminAPI.VerifyTierHandler))
		// Tier stats

	healthRouter.Methods(http.MethodHead).Path(healthCheckClusterPath).HandlerFunc(httpTraceAll(ClusterCheckHandler))
	healthRouter.Methods(http.MethodGet).Path(healthCheckClusterReadPath).HandlerFunc(httpTraceAll(ClusterReadCheckHandler))
	healthRouter.Methods(http.MethodHead).Path(healthCheckClusterReadPath).HandlerFunc(httpTraceAll(ClusterReadCheckHandler))

		kmsRouter.Methods(http.MethodGet).Path(version + "/status").HandlerFunc(gz(httpTraceAll(kmsAPI.KMSStatusHandler)))
		kmsRouter.Methods(http.MethodGet).Path(version + "/metrics").HandlerFunc(gz(httpTraceAll(kmsAPI.KMSMetricsHandler)))
		kmsRouter.Methods(http.MethodGet).Path(version + "/apis").HandlerFunc(gz(httpTraceAll(kmsAPI.KMSAPIsHandler)))
		kmsRouter.Methods(http.MethodGet).Path(version + "/version").HandlerFunc(gz(httpTraceAll(kmsAPI.KMSVersionHandler)))

		subrouter.Methods(http.MethodPost).Path("/v1/health").HandlerFunc(lockServer.HealthHandler)
		subrouter.Methods(http.MethodPost).Path("/v1/refresh").HandlerFunc(lockServer.RefreshHandler)
		subrouter.Methods(http.MethodPost).Path("/v1/lock").HandlerFunc(lockServer.LockHandler)
		subrouter.Methods(http.MethodPost).Path("/v1/rlock").HandlerFunc(lockServer.RLockHandler)

		case "HeadObject":
			// Register HeadObject handler.
			bucket.Methods("Head").Path("/{object:.+}").HandlerFunc(api.HeadObjectHandler)
		case "GetObject":
			// Register GetObject handler.
			bucket.Methods(http.MethodGet).Path("/{object:.+}").HandlerFunc(api.GetObjectHandler)
		case "PutObject":

func registerPeerRESTHandlers(router *mux.Router, gm *grid.Manager) {
	h := func(f http.HandlerFunc) http.HandlerFunc {
		return collectInternodeStats(httpTraceHdrs(f))
	}

	server := &peerRESTServer{}
	subrouter := router.PathPrefix(peerRESTPrefix).Subrouter()
	subrouter.Methods(http.MethodPost).Path(peerRESTVersionPrefix + peerRESTMethodHealth).HandlerFunc(h(server.HealthHandler))

			subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodVerifyFile).HandlerFunc(h(server.VerifyFileHandler))
			subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodStatInfoFile).HandlerFunc(h(server.StatInfoFile))

		noQueries := len(r.URL.RawQuery) == 0
		return ctypeOk && noQueries
	}).HandlerFunc(httpTraceAll(sts.AssumeRoleWithSSO))

	// AssumeRoleWithClientGrants
	stsRouter.Methods(http.MethodPost).HandlerFunc(httpTraceAll(sts.AssumeRoleWithClientGrants)).
		Queries(stsAction, clientGrants).
		Queries(stsVersion, stsAPIVersion).
		Queries(stsToken, "{Token:.*}")

		tc.ResponseRecorder.LogAllBody = logBody
		tc.ResponseRecorder.LogErrBody = true

		f.ServeHTTP(w, r)
	}
}

func httpTraceAll(f http.HandlerFunc) http.HandlerFunc {
	return httpTrace(f, true)
}

func httpTraceHdrs(f http.HandlerFunc) http.HandlerFunc {
	return httpTrace(f, false)