+ temp = Files.createTempFile(".jalview_", ".tmp");
+
+ URL url = new URL(urlstring);
+ rbc = Channels.newChannel(url.openStream());
+ fos = new FileOutputStream(temp.toString());
+ fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+
+ // copy tempfile to outfile once our download completes
+ // incase something goes wrong
+ Files.copy(temp, Paths.get(outfile),
+ StandardCopyOption.REPLACE_EXISTING);