def authenticate(self, token=None, request=None):
""" Reads in a Facebook code and asks Facebook
if it's valid and what user it points to. """
keystone = KeystoneBackend()
self.keystone = keystone
args = {
'client_id': settings.FACEBOOK_APP_ID,
'client_secret': settings.FACEBOOK_APP_SECRET,
'redirect_uri': request.build_absolute_uri(
reverse('horizon.facebook.views.authentication_callback')),
'code': token,
}
# Get a legit access token
target = urllib.urlopen(
'https://graph.facebook.com/oauth/access_token?'
+ urllib.urlencode(args)).read()
response = cgi.parse_qs(target)
if 'access_token' not in response:
messages.error(
request, _("Token Expired, please login again."))
return None
access_token = response['access_token'][-1]
# Read the user's profile information
fb_profile = urllib.urlopen(
'https://graph.facebook.com/me?access_token=%s' % access_token)
fb_profile = json.load(fb_profile)
tenant_id = None
password = ""
try:
# Try and find existing user
fb_user = FacebookProfile.objects.get(facebook_id=fb_profile['id'])
user = fb_user.user
# Update access_token
fb_user.access_token = access_token
password = fb_user.password
tenant_id = fb_user.tenant_id
fb_user.save()
except FacebookProfile.DoesNotExist:
# No existing user
try:
facebook_id = fb_profile['id']
username = "******" % facebook_id
try:
user = User.objects.create_user(username, fb_profile['email'])
except IntegrityError:
# Username already exists, make it unique
existing_user = User.objects.get(username=username)
existing_user.delete()
user = User.objects.create_user(username, fb_profile['email'])
user.save()
password = "".join([random.choice(
string.ascii_lowercase + string.digits)
for i in range(8)])
# Create the FacebookProfile
fb_user = FacebookProfile(user=user, facebook_id=fb_profile['id'],
access_token=access_token,
password=password)
tenant_name = "facebook%s" % fb_profile['id']
if not self.keystone_user_exists(username):
tenant = self.add_keystone_user(settings, tenant_name, password, fb_profile)
else:
tenant = self.get_keystone_tenant(settings, tenant_name)
fb_user.tenant_id = tenant.id
tenant_id = fb_user.tenant_id
fb_user.save()
except Exception, e:
messages.error(request, e)
fb_user.delete()
