splinext/users/controllers/accounts.py

   1 import logging
   2 from openid.consumer.consumer import Consumer
   3 from openid.extensions.sreg import SRegRequest, SRegResponse
   4 from openid.store.filestore import FileOpenIDStore
   5 from openid.yadis.discover import DiscoveryFailure
   6 from sqlalchemy.orm.exc import NoResultFound
   7
   8 from pylons import config, request, response, session, tmpl_context as c, url
   9 from pylons.controllers.util import abort, redirect_to
  10 from routes import request_config
  11
  12 from spline import model
  13 from spline.model import meta
  14 from spline.lib import helpers as h
  15 from spline.lib.base import BaseController, render
  16
  17 log = logging.getLogger(__name__)
  18
  19 class AccountsController(BaseController):
  20
  21     openid_store = FileOpenIDStore('/var/tmp')
  22
  23     def _bail(self, reason):
  24         # Used for bailing on a login attempt; reshows the login page
  25         c.error = reason
  26         c.attempted_openid = request.params.get('openid_identifier', '')
  27         return render('/users/login.mako')
  28
  29
  30     def login(self):
  31         c.error = None
  32         c.attempted_openid = None
  33         return render('/users/login.mako')
  34
  35     def login_begin(self):
  36         """Step one of logging in with OpenID; we redirect to the provider"""
  37
  38         cons = Consumer(session=session, store=self.openid_store)
  39
  40         try:
  41             openid_url = request.params['openid_identifier']
  42         except KeyError:
  43             return self._bail("Gotta enter an OpenID to log in.")
  44
  45         try:
  46             auth_request = cons.begin(openid_url)
  47         except DiscoveryFailure:
  48             return self._bail(
  49                 "Can't connect to '{0}'.  You sure it's an OpenID?"
  50                 .format(openid_url)
  51             )
  52
  53         sreg_req = SRegRequest(optional=['nickname', 'email', 'dob', 'gender',
  54                                          'country', 'language', 'timezone'])
  55         auth_request.addExtension(sreg_req)
  56
  57         host = request.headers['host']
  58         protocol = request_config().protocol
  59         return_url = url(host=host, controller='accounts', action='login_finish')
  60         new_url = auth_request.redirectURL(return_to=return_url,
  61                                            realm=protocol + '://' + host)
  62         redirect_to(new_url)
  63
  64     def login_finish(self):
  65         """Step two of logging in; the OpenID provider redirects back here."""
  66
  67         cons = Consumer(session=session, store=self.openid_store)
  68         host = request.headers['host']
  69         return_url = url(host=host, controller='accounts', action='login_finish')
  70         res = cons.complete(request.params, return_url)
  71
  72         if res.status != 'success':
  73             return 'Error!  %s' % res.message
  74
  75         try:
  76             # Grab an existing user record, if one exists
  77             q = meta.Session.query(model.User) \
  78                     .filter(model.User.openids.any(openid=res.identity_url))
  79             user = q.one()
  80         except NoResultFound:
  81             # Try to pull a name out of the SReg response
  82             sreg_res = SRegResponse.fromSuccessResponse(res)
  83             try:
  84                 username = sreg_res['nickname']
  85             except (KeyError, TypeError):
  86                 # KeyError if sreg has no nickname; TypeError if sreg is None
  87                 username = 'Anonymous'
  88
  89             # Create db records
  90             user = model.User(name=username)
  91             meta.Session.add(user)
  92
  93             openid = model.OpenID(openid=res.identity_url)
  94             user.openids.append(openid)
  95
  96             meta.Session.commit()
  97
  98         # Remember who's logged in, and we're good to go
  99         session['user_id'] = user.id
 100         session.save()
 101
 102         h.flash(u"""Hello, {0}!""".format(user.name),
 103                 icon='user')
 104
 105         redirect_to('/', _code=303)
 106
 107     def logout(self):
 108         """Logs the user out."""
 109
 110         if 'user_id' in session:
 111             del session['user_id']
 112             session.save()
 113
 114             h.flash(u"""Logged out.""",
 115                     icon='user-silhouette')
 116
 117         redirect_to('/', _code=303)