Add encoding fix

[Peetz0r]

Signed-off-by: Hugo D. (jabesq) jabesq@gmail.com

Fixes https://github.com/stianaske/pybotvac/issues/3

This is an issue which happens on python3, doesn't happen on python2.

[stianaske]

Merged, but removed encoding fix, as this does not seem to work. Please submit new pull request with new fix if needed.

[Peetz0r]

With the fix removed, it fails for me with:

>>> r.get_robot_state()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/peter/pybotvac/pybotvac/robot.py", line 73, in get_robot_state
    return self._message({'reqId': "1", 'cmd': "getRobotState"})
  File "/home/peter/pybotvac/pybotvac/robot.py", line 46, in _message
    headers=self._headers)
  File "/usr/local/lib/python3.5/dist-packages/requests/api.py", line 110, in post
    return request('post', url, data=data, json=json, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/requests/api.py", line 56, in request
    return session.request(method=method, url=url, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/requests/sessions.py", line 474, in request
    prep = self.prepare_request(req)
  File "/usr/local/lib/python3.5/dist-packages/requests/sessions.py", line 407, in prepare_request
    hooks=merge_hooks(request.hooks, self.hooks),
  File "/usr/local/lib/python3.5/dist-packages/requests/models.py", line 306, in prepare
    self.prepare_auth(auth, url)
  File "/usr/local/lib/python3.5/dist-packages/requests/models.py", line 543, in prepare_auth
    r = auth(self)
  File "/home/peter/pybotvac/pybotvac/robot.py", line 111, in __call__
    msg='\n'.join([self.serial.lower(), date, request.body.decode('utf8')]).encode('utf8'),
TypeError: sequence item 2: expected str instance, bytes found

With the fix removed, it used to work before, but now fails with:

>>> r.get_robot_state()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/peter/pybotvac/pybotvac/robot.py", line 73, in get_robot_state
    return self._message({'reqId': "1", 'cmd': "getRobotState"})
  File "/home/peter/pybotvac/pybotvac/robot.py", line 47, in _message
    response.raise_for_status()
  File "/usr/local/lib/python3.5/dist-packages/requests/models.py", line 909, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 404 Client Error: Not Found for url: https://nucleo.neatocloud.com/vendors/neato/robots/OPSXXXXX-YYYYYYYYYYYY/messages

I get the same results on Ubuntu 14.04 with Python 3.4.3 and Ubuntu 16.04 with Python 3.5.2.

On Python 2.7.12 I get the 404 error both with and without the fix.

[stianaske]

This seems to be due to a change between earlier versions of requests (2.10.0 in my case) and 2.13.0. The latest commit should work with both.