Can I use JavaXPCOM to ask XULRunner to download a file for me?

Hi, I have an application to get the links of the document from DOM
tree:


			final nsIDOMHTMLCollection list = nsIDOMHTMLDocument.getLinks();
			final List<String> links = new ArrayList<String>();
			for (int i = 0; i < list.getLength(); i++) {
				final String nodeValue =
list.item(i).getAttributes().getNamedItem("href").getNodeValue();
				if (!nodeValue.contains("://")) {
					final String link = url.getProtocol() + "://" + url.getHost() +
"/" + nodeValue;
					links.add(link);
				}
			}

Then, I download the link using following code:


		for (Iterator<String> iterator = links.iterator();
iterator.hasNext();) {
			final String link = iterator.next();
			final File file = new File(USER_DIR,
link.substring(link.lastIndexOf('/')).replace("?", "_"));
			try {
				file.createNewFile();
				IOUtils.copy(new URL(link).openStream(), new
FileOutputStream(file));
				inList.add(file.getAbsolutePath());
			} catch (Exception e) {
				System.err.println(file.getAbsolutePath());
				e.printStackTrace();
			}
		}


However, this probably don't work if the site require user login to
view the page, because every new URL(link).openStream() will start a
new session at web server. Can I call XULRunner to download the link
to suitable place??