REST API and HTTP errors

[stanislavlevin]

The following query crashes:

import bugzilla


URL = "bugzilla.stage.redhat.com"
bzapi = bugzilla.Bugzilla(URL, force_rest=True, use_creds=False)
print(bzapi.logged_in)

Traceback (most recent call last):
  File "/usr/src/RPM/BUILD/python-bugzilla/bugzilla/_session.py", line 108, in request
    response.raise_for_status()
  File "/usr/lib/python3/site-packages/requests/models.py", line 1021, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url: https://bugzilla.stage.redhat.com/rest/user?ids=1

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/src/test.py", line 6, in <module>
    print(bzapi.logged_in)
  File "/usr/src/RPM/BUILD/python-bugzilla/bugzilla/base.py", line 720, in logged_in
    raise e
  File "/usr/src/RPM/BUILD/python-bugzilla/bugzilla/base.py", line 714, in logged_in
    self._backend.user_get({"ids": [1]})
  File "/usr/src/RPM/BUILD/python-bugzilla/bugzilla/_backendrest.py", line 182, in user_get
    return self._get("/user", paramdict)
  File "/usr/src/RPM/BUILD/python-bugzilla/bugzilla/_backendrest.py", line 63, in _get
    return self._op("GET", *args, **kwargs)
  File "/usr/src/RPM/BUILD/python-bugzilla/bugzilla/_backendrest.py", line 58, in _op
    response = self._bugzillasession.request(method, fullurl, data=data,
  File "/usr/src/RPM/BUILD/python-bugzilla/bugzilla/_session.py", line 112, in request
    raise type(e)(message).with_traceback(sys.exc_info()[2])
  File "/usr/src/RPM/BUILD/python-bugzilla/bugzilla/_session.py", line 108, in request
    response.raise_for_status()
  File "/usr/lib/python3/site-packages/requests/models.py", line 1021, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url: https://bugzilla.stage.redhat.com/rest/user?ids=1

The problem is that logged_in expects BugzillaError or any other exception having code or faultCode attribute.

Bugzilla codes are mapped to HTTP status codes:
https://github.com/bugzilla/bugzilla/blob/7581e08f9136ec32219af6c3192e42ff1c8e9691/Bugzilla/WebService/Constants.pm#L262-L287

But this project don't handle such codes on HTTP errors.