for (Element element : document.select("a[href]")) {
        String href = element.attr("href");
        HttpUrl link = response.request().url().resolve(href);
        if (link == null) continue; // URL is either invalid or its scheme isn't http/https.
        queue.add(link.newBuilder().fragment(null).build());
      }
    }
  }

  public static void main(String[] args) throws IOException {
    if (args.length != 2) {