final FessConfig fessConfig = ComponentUtil.getFessConfig();

        if (!fessConfig.isAcceptedSearchReferer(request.getHeader("referer"))) {
            writeJsonResponse(HttpServletResponse.SC_BAD_REQUEST, escapeJsonKeyValue(MESSAGE_FIELD, "Referer is invalid."));
            return;
        }

        if (!fessConfig.isApiSearchScroll()) {

        }
        if (patterns.length == 0) {
            return true;
        }

        if (referer == null) {
            return false;
        }
        return Arrays.stream(patterns).anyMatch(p -> p.matcher(referer).matches());
    }

    String getQueryHighlightContentDescriptionFields();