cas_provider/forms.py

   1 from django import forms
   2 from django.conf import settings
   3 from django.contrib.auth import authenticate
   4 from django.core.exceptions import ValidationError
   5 from django.utils.translation import ugettext_lazy as _
   6 from models import LoginTicket
   7 import datetime
   8
   9
  10 __all__ = ['LoginForm', ]
  11
  12
  13 class LoginForm(forms.Form):
  14     username = forms.CharField(max_length=30, label=_('username'))
  15     password = forms.CharField(widget=forms.PasswordInput, label=_('password'))
  16     lt = forms.CharField(widget=forms.HiddenInput)
  17     service = forms.CharField(widget=forms.HiddenInput, required=False)
  18
  19     def __init__(self, *args, **kwargs):
  20         super(LoginForm, self).__init__(*args, **kwargs)
  21         self._user = None
  22
  23     def clean_lt(self):
  24         ticket = self.cleaned_data['lt']
  25         timeframe = datetime.datetime.now() - \
  26                     datetime.timedelta(minutes=settings.CAS_TICKET_EXPIRATION)
  27         try:
  28             return LoginTicket.objects.get(ticket=ticket, created__gte=timeframe)
  29         except LoginTicket.DoesNotExist:
  30             raise ValidationError(_('Login ticket expired. Please try again.'))
  31         return ticket
  32
  33     def clean(self):
  34         username = self.cleaned_data.get('username')
  35         password = self.cleaned_data.get('password')
  36         user = authenticate(username=username, password=password)
  37         if user is None:
  38             raise ValidationError(_('Incorrect username and/or password.'))
  39         if not user.is_active:
  40             raise ValidationError(_('This account is disabled.'))
  41         self._user = user
  42         self.cleaned_data.get('lt').delete()
  43         return self.cleaned_data
  44
  45     def get_user(self):
  46         return self._user
  47
  48     def get_errors(self):
  49         errors = []
  50         for k, error in self.errors.items():
  51             errors += [e for e in error]
  52         return errors