private static final Logger logger = LoggerFactory.getLogger(HtmlTransformer.class);

    protected static final String LOCATION_HEADER = "Location";

    @Resource
    protected CrawlerContainer crawlerContainer;

    protected Map<String, String> featureMap = new HashMap<>();

    protected Map<String, String> propertyMap = new HashMap<>();

    protected Map<String, String> childUrlRuleMap = new LinkedHashMap<>();