if (redirectUrlObj instanceof String) {
            final UrlConvertHelper urlConvertHelper = crawlerContainer.getComponent("urlConvertHelper");
            resultData.addUrl(RequestDataBuilder.newRequestData().get().url(urlConvertHelper.convert(redirectUrlObj.toString())).build());
        }

        return resultData;
    }

    protected boolean isHtml(final ResponseData responseData) {

        urlList.clear();
        urlList.add(RequestDataBuilder.newRequestData().get().url("http://www.example.com").build());
        urlList = fessXpathTransformer.convertChildUrlList(urlList);
        assertEquals(1, urlList.size());
        assertEquals("http://www.example.com", urlList.get(0).getUrl());

        urlList.clear();
        urlList.add(RequestDataBuilder.newRequestData().get().url("http://www.example.com").build());

                && isValidCanonicalUrl(responseData.getUrl(), canonicalUrl)) {
            final Set<RequestData> childUrlSet = new HashSet<>();
            childUrlSet.add(RequestDataBuilder.newRequestData().get().url(canonicalUrl).build());
            logger.info("CANONICAL: {} -> {}", responseData.getUrl(), canonicalUrl);
            throw new ChildUrlsException(childUrlSet, this.getClass().getName() + "#putAdditionalData");