username:password@url domains do not work after Python3k conversion.

[makefu]

With the py3k conversion ( ./convert-to-python3.sh ) for urlwatch URLs with the pattern http://username:password@localhost/ do not work.

urlwatch crashes with:

File "/nix/store/sv62w8czrr5pziwwkgi67xw2vbc3swrs-python3.4-urlwatch-1.18/bin/.urlwatch-wrapped", line 307, in <module>
raise exception
File "/nix/store/4z7g0rlc27nwyq1mfn57kiijnnqn2swk-python3-3.4.3/lib/python3.4/concurrent/futures/thread.py", line 54, in run
result = self.fn(*self.args, **self.kwargs)
File "/nix/store/sv62w8czrr5pziwwkgi67xw2vbc3swrs-python3.4-urlwatch-1.18/bin/.urlwatch-wrapped", line 288, in process_job
data = job.retrieve(timestamp, filter_func, headers, log)
File "/nix/store/sv62w8czrr5pziwwkgi67xw2vbc3swrs-python3.4-urlwatch-1.18/lib/python3.4/site-packages/urlwatch/handler.py", line 142, in retrieve
parts.password)).encode('base64').strip())
LookupError: 'base64' is not a text encoding; use codecs.encode() to handle arbitrary codecs

This issue does not occur when using python2 instead.

Initially i opened a ticket at NixOS/nixpkgs#12021

[jgillich]

In handler.py#L142:

headers['Authorization'] = 'Basic %s' % (auth_token.encode('base64').strip())

2to3 somehow misses that.