Hi All!

I started a new branch 'external-download' where the new external downloaded
could be tested. At the moment the external downloader replaces the previous
logic.

But there is an issue if we try to download some files that require
authentication (Basic-Autentication) that is handles by webkit and worked with
the webkit downloader. This authentication does not use the cookie file,
instead the credentials are given with each request. A possible solution could
be to give the credentials to the script too (they will be visible in
process list). But I'm not sure if we can get the credentials out of webkit
easily, and we don't know if the URL to be downloaded requires these
authentication.

1. We could start the download in a new terminal window, so the script can
   ask the user for the credentials if those are required. This could fill the
   workspace with some ugly terminal windows.
2. A more difficult solution would be to check check response code or error
   messages or the external script if authentication is required. If this is
   the case we could ask the credentials through vimb and give them to the
   script.
   The credentials would also be visible in the process list, but we don't need
   to run the script in a dedicated terminal.

I'm not sure how often a user would download something from a page that uses
Basic-Authentication. The surf browser have the same problem, but nobody seems
to be annoyed about this. So maybe this issue is it worth to bloat vimb and to
spent to much time to solve it.

Daniel

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