Looks like #19, but no requests around

[mcepl]

Hi, when running fanficfare with python2.7 from python3 branch of https://github.com/mcepl/FanFicFare/tree/python3 I get this:

matej@mitmanek: test_epub$ ~/.bin/fanficfare -u https://archiveofourown.org/works/14927013/
Traceback (most recent call last):
  File "/home/matej/.bin/fanficfare", line 9, in <module>
    load_entry_point('FanFicFare', 'console_scripts', 'fanficfare')()
  File "/home/matej/repos/FanFicFare/fanficfare/cli.py", line 267, in main
    passed_personalini)
  File "/home/matej/repos/FanFicFare/fanficfare/cli.py", line 373, in do_download
    adapter.getStoryMetadataOnly()
  File "/home/matej/repos/FanFicFare/fanficfare/adapters/base_adapter.py", line 279, in getStoryMetadataOnly
    self.doExtractChapterUrlsAndMetadata(get_cover=get_cover)
  File "/home/matej/repos/FanFicFare/fanficfare/adapters/base_adapter.py", line 363, in doExtractChapterUrlsAndMetadata
    return self.extractChapterUrlsAndMetadata()
  File "/home/matej/repos/FanFicFare/fanficfare/adapters/adapter_archiveofourownorg.py", line 156, in extractChapterUrlsAndMetadata
    data = self._fetchUrl(url)
  File "/home/matej/repos/FanFicFare/fanficfare/configurable.py", line 1249, in _fetchUrl
    referer=referer)[0]
  File "/home/matej/repos/FanFicFare/fanficfare/configurable.py", line 1238, in _fetchUrlOpened
    referer=referer)
  File "/home/matej/repos/FanFicFare/fanficfare/configurable.py", line 1139, in _fetchUrlOpened
    raise(excpt)
AttributeError: 'HTTPMessage' object has no attribute 'getheaders'
matej@mitmanek: test_epub$ 

which in reality (there is a lot of weird exception handling) is

Traceback (most recent call last):
  File "/home/matej/repos/FanFicFare/fanficfare/configurable.py", line 1127, in _fetchUrlOpened
    referer=referer)
  File "/home/matej/repos/FanFicFare/fanficfare/configurable.py", line 1087, in _fetchUrlRawOpened
    opened = self.opener.open(url.replace(' ','%20'),None,float(self.getConfig('connect_timeout',30.0)))
  File "/home/matej/.local/lib/python2.7/site-packages/future/backports/urllib/request.py", line 500, in open
    response = meth(req, response)
  File "/home/matej/.local/lib/python2.7/site-packages/future/backports/urllib/request.py", line 1344, in http_response
    self.cookiejar.extract_cookies(response, request)
  File "/usr/lib64/python2.7/cookielib.py", line 1642, in extract_cookies
    for cookie in self.make_cookies(response, request):
  File "/usr/lib64/python2.7/cookielib.py", line 1559, in make_cookies
    rfc2965_hdrs = headers.getheaders("Set-Cookie2")
AttributeError: 'HTTPMessage' object has no attribute 'getheaders'

It looks very much like #19, except FanFicFare doesn't use requests but only the standard library. Any idea, what's going on?