public File unpackClient(URL url, File targetDir, String clientname) throws IOException {
      if(!targetDir.exists()) {
         targetDir.mkdirs();
      }
      this.theme.setAuth("Скачивание обновления " + clientname);
      URLConnection urlconnection = url.openConnection();
      this.totalDownload = urlconnection.getContentLength() / 1024;
      this.onePercent = (double)(this.totalDownload / 100);
      BufferedInputStream in = new BufferedInputStream(url.openStream(), 1024);
      File zip = File.createTempFile("client", ".zip", targetDir);
      BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(zip));
      this.copyInputStream(in, out, false);
      out.close();
      return this.unpackArchive(zip, targetDir);
   }