childUrlRuleMap.put("//IFRAME", "src");
        childUrlRuleMap.put("//IMG", "src");
        childUrlRuleMap.put("//LINK", "href");
        childUrlRuleMap.put("//SCRIPT", "src");
        fileTransformer.setChildUrlRuleMap(childUrlRuleMap);
    }

    protected void setBaseDir() throws IOException {
        fileTransformer.baseDir = File.createTempFile("crawler-", "");
        fileTransformer.baseDir.delete();