def login_return(request):
"""
OAuth callback.
"""
##################
# 1) Validations #
##################
# Check for required parameter.
code = request.GET.get('code', None)
if not code:
messages.add_message(request, messages.ERROR, _('Facebook login error #1'))
return HttpResponseRedirect(reverse('yaccounts:index'))
###########################
# 2) Request access token #
###########################
request_access_token_url = access_token_url + '?client_id=' + app_id \
+ '&redirect_uri=' + settings.HOST_URL + reverse('yaccounts:facebook_return') \
+ '&client_secret=' + app_secret \
+ '&code=' + code
response = cgi.parse_qs(urllib.urlopen(request_access_token_url).read())
try:
access_token = response['access_token'][-1]
except KeyError:
messages.add_message(request, messages.ERROR, _('Facebook login error #2'))
return HttpResponseRedirect(reverse('yaccounts:index'))
# Verify credentials.
# Validate user access token. If we can fetch it's information, the token is good!
try:
fb_api = facebook.GraphAPI(access_token=access_token)
userinfo = UserInfo(fb_api.get_object('me'))
except:
messages.add_message(request, messages.ERROR, _('Facebook login error #3'))
return HttpResponseRedirect(reverse('yaccounts:index'))
#########################################################
# 3) Authenticate user with given Facebook credentials. #
#########################################################
user = authenticate(facebook_userinfo=userinfo, facebook_access_token=access_token)
##
# a) Facebook profile is linked with existing user account.
if user:
# Additional information on the request that should be logged.
metadata = { 'user_agent': request.META['HTTP_USER_AGENT'] }
# If user is active, login account and redirect to next page (if provided, else account profile)
if user.is_active:
# Create user login session.
login(request, user)
# Log authentication.
AuthenticationLog.new(email=user.email,
valid_credentials=True,
credentials_type='facebook',
account_status='active',
success=True,
ip_address=request.META['REMOTE_ADDR'],
metadata=json.dumps(metadata))
# Redirect to either page referenced as next or accounts index.
return HttpResponseRedirect(request.session.get('login_next', reverse('yaccounts:index')))
# User account is inactive.
else:
# Log authentication.
AuthenticationLog.new(email=user.email,
valid_credentials=True,
credentials_type='facebook',
account_status='disabled',
success=False,
ip_address=request.META['REMOTE_ADDR'],
metadata=json.dumps(metadata))
# Message.
messages.warning(request, _("Your account is disabled."))
# Return.
return HttpResponseRedirect(reverse('yaccounts:login'))
##
# b) Unknown Facebook profile.
else:
# i) If there is an account logged in, (attempt to) link the Facebook profile with it.
if request.user.is_authenticated():
try:
FacebookProfile.new(user=request.user, userinfo=userinfo, access_token=access_token)
messages.success(request, _("Facebook account connected successfully."))
except IntegrityError:
messages.error(request, _("You already have a Facebook profile linked to your account."))
return HttpResponseRedirect(reverse('yaccounts:index'))
# ii) Create new account.
else:
# Place Facebook info in a session variable in order for it to be accessed in the registration page.
request.session['facebook_create'] = {
'facebook_user_id': userinfo.id,
'name': userinfo.name,
'profile_image_url': FacebookProfile.get_profile_image_url(userinfo.id),
'access_token': access_token,
'expires': (datetime.datetime.now() + datetime.timedelta(seconds=5*60)).strftime('%s') # Convert to epoch to be JSON serializable.
}
return HttpResponseRedirect(reverse('yaccounts:facebook_create'))
def create_account(request):
"""
Create new account with Facebook credentials.
"""
#
# Lets validate if we should be here.
#
# If user is authenticated, then this place shouldn't be reached.
# Facebook profile, if valid, should be linked with the logged in account and not create a new account.
if request.user.is_authenticated():
return HttpResponseRedirect(reverse('yaccounts:index'))
# In order to create account with Facebook profile, its details should have been stored in session.
facebook_create = request.session.get('facebook_create', None)
if not facebook_create:
messages.error(request, _('Facebook login error #4'))
return HttpResponseRedirect(reverse('yaccounts:login'))
# If time window for registration of new account with this Facebook profile has expired,
# delete it from session and restart Facebook login process.
if datetime.datetime.now() > datetime.datetime.fromtimestamp(float(facebook_create['expires'])):
del request.session['facebook_create']
return HttpResponseRedirect(reverse('yaccounts:facebook_login'))
#
# Proceed with account creation.
#
email = ''
# A form was received.
if request.method == 'POST':
proceed = True
# Fetch mandatory params.
try:
email = request.POST['email']
except KeyError:
proceed = False
messages.error(request, _("Please provide an e-mail address."))
# Validate email address.
try:
validate_email(email)
except ValidationError:
proceed = False
messages.error(request, _("Please provide a valid email address."))
# Check if Facebook profile is already connected to another account.
try:
FacebookProfile.objects.get(facebook_user_id=facebook_create['facebook_user_id'])
proceed = False
messages.error(request, _("Facebook profile already connected to another account."))
except ObjectDoesNotExist:
pass
# Check if account exists with given email address.
try:
get_user_model().objects.get(email=email)
proceed = False
messages.error(request, _("Email already registered."))
except ObjectDoesNotExist:
pass
#
# Everything checks! \o/
#
if proceed:
# 1) Create user with random password.
try:
random_password = generate_key(email + str(datetime.datetime.now()) + str(facebook_create['facebook_user_id']))
random_password += datetime.datetime.now().strftime('%s')
user = get_user_model().new(name=facebook_create['name'], email=email, password=random_password, credentials_type='facebook')
except:
logger.error('Error creating user via Facebook! #5 ' + str(facebook_create), exc_info=1)
messages.error(request, _('Facebook login error #5'))
# 2) Create Facebook profile and associate it with the new user.
try:
userinfo = UserInfo(userinfo={ 'id': facebook_create['facebook_user_id'], 'name': facebook_create['name'] })
FacebookProfile.new(user=user, userinfo=userinfo, access_token=facebook_create['access_token'])
# Redirect to login page with message.
messages.success(request, _("An email was sent in order to confirm your account."))
return HttpResponseRedirect(reverse('yaccounts:login'))
except:
user.delete() # Delete newly created user (as it would be inaccessible since the Facebook Profile wasn't created!)
logger.error('Error creating user via Facebook! #6 ' + str(facebook_create), exc_info=1)
messages.error(request, _('Facebook login error #6'))
# Render page.
return render_to_response('yaccounts/create_social.html',
{ 'avatar': facebook_create['profile_image_url'],
'username': facebook_create['name'],
'email': email,
'post_url': reverse('yaccounts:facebook_create') },
context_instance=RequestContext(request))