feature : responses whit context (#2637)

rest/handler/timeouthandler.go

@@ -99,7 +99,7 @@ func (h *timeoutHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		defer tw.mu.Unlock()
 		// there isn't any user-defined middleware before TimoutHandler,
 		// so we can guarantee that cancelation in biz related code won't come here.
-		httpx.Error(w, ctx.Err(), func(w http.ResponseWriter, err error) {
+		httpx.ErrorCtx(r.Context(), w, ctx.Err(), func(w http.ResponseWriter, err error) {
 			if errors.Is(err, context.Canceled) {
 				w.WriteHeader(statusClientClosedRequest)
 			} else {