if (!acceptHttpMethod(request, POST)) {
            return;
        }

        if (!ComponentUtil.getFessConfig().isUserFavorite()) {
            writeJsonResponse(HttpServletResponse.SC_BAD_REQUEST, escapeJsonKeyValue(MESSAGE_FIELD, "Unsupported operation."));
            return;
        }

    }

    default void setUserFavorite(final boolean value) {
        setSystemPropertyAsBoolean(Constants.USER_FAVORITE_PROPERTY, value);
    }

    default boolean isUserFavorite() {
        return getSystemPropertyAsBoolean(Constants.USER_FAVORITE_PROPERTY, false);
    }

    default void setWebApiJson(final boolean value) {