[Bug 1471894] Re: _bad_oauth_token crashes on python3 (str vs bytes)

[Tiago Stürmer Daitx]

And the exact version tested:

$ apt-cache policy python3-launchpadlib
python3-launchpadlib:
  Installed: 1.10.3-3ubuntu0.1
  Candidate: 1.10.3-3ubuntu0.1
  Version table:
 *** 1.10.3-3ubuntu0.1 400
        400 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages
        400 http://archive.ubuntu.com/ubuntu xenial-proposed/main i386 Packages
        100 /var/lib/dpkg/status
     1.10.3-3 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu xenial/main i386 Packages

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Title:
  _bad_oauth_token crashes on python3 (str vs bytes)

Status in launchpadlib :
  Fix Released
Status in python-launchpadlib package in Ubuntu:
  Fix Released
Status in python-launchpadlib source package in Xenial:
  Fix Committed

Bug description:
  [Impact]

   * Unable to renew/relogin with a new oauth token, using python3 scripts
   * python2 APIs work (because python2 does not care about str vs bytes)

  [Test Case]

   * Attempt login_with() using python3 and an expired/invalid existing token
   * Relogin should be successful, without crashing scripts

  [Regression Potential]

   * No change in behaviour on python2 (which is what used by reverse dependencies)
   * this is a backport to fix python3 behaviour, for all the newly ported maintainance scripts in python3 that prefer to run on "stable" systems

  [Other Info]

   * Well tested in later releases, and with users running from trunk.
   * I believe this still is not published in the cheeseshop.

  [Original bug report]

  Hi

  Running something as simple as

  >>> from launchpadlib.launchpad import Launchpad
  >>> launchpad = Launchpad.login_with("app", "production")

  Results in a traceback such as this one:

  Traceback (most recent call last):
    File "./foo.py", line 31, in <module>
      lb = launchpad.projects[project]
    File "/usr/lib/python3/dist-packages/lazr/restfulclient/resource.py", line 1001, in __getitem__
      shim_resource._ensure_representation()
    File "/usr/lib/python3/dist-packages/lazr/restfulclient/resource.py", line 382, in _ensure_representation
      representation = self._root._browser.get(self._wadl_resource)
    File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 436, in get
      response, content = self._request(url, extra_headers=headers)
    File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 387, in _request
      str(url), method=method, body=data, headers=headers)
    File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 357, in _request_and_retry
      url, method=method, body=body, headers=headers)
    File "/usr/lib/python3/dist-packages/httplib2/__init__.py", line 1291, in request
      (response, content) = self._request(conn, authority, uri, request_uri, method, body, headers, redirections, cachekey)
    File "/usr/lib/python3/dist-packages/launchpadlib/launchpad.py", line 132, in _request
      return self.retry_on_bad_token(response, content, *args)
    File "/usr/lib/python3/dist-packages/launchpadlib/launchpad.py", line 139, in retry_on_bad_token
      if (self._bad_oauth_token(response, content)
    File "/usr/lib/python3/dist-packages/launchpadlib/launchpad.py", line 125, in _bad_oauth_token
      (content.startswith("Expired token")
  TypeError: startswith first arg must be bytes or a tuple of bytes, not str

  This doesn't happen on python2. I will follow up with a patch shortly.

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