cas_provider/views.py

   1 import urllib
   2
   3 from django.http import HttpResponse, HttpResponseRedirect
   4 from django.shortcuts import render_to_response
   5 from django.template import RequestContext
   6 from django.contrib.auth import authenticate
   7 from django.contrib.auth import login as auth_login, logout as auth_logout
   8 from django.core.urlresolvers import reverse
   9
  10 from forms import LoginForm, MergeLoginForm
  11 from models import ServiceTicket
  12 from utils import create_service_ticket
  13 from exceptions import SameEmailMismatchedPasswords
  14
  15 __all__ = ['login', 'validate', 'logout']
  16
  17
  18 def login(request, template_name='cas/login.html', success_redirect='/account/', merge=False):
  19     service = request.GET.get('service', None)
  20     if service is not None:
  21         request.session['service'] = service
  22     if request.user.is_authenticated():
  23         if service is not None:
  24             ticket = create_service_ticket(request.user, service)
  25             if service.find('?') == -1:
  26                 return HttpResponseRedirect(service + '?ticket=' + ticket.ticket)
  27             else:
  28                 return HttpResponseRedirect(service + '&ticket=' + ticket.ticket)
  29         else:
  30             return HttpResponseRedirect(success_redirect)
  31     errors = []
  32     if request.method == 'POST':
  33         if merge:
  34             form = MergeLoginForm(request.POST, request=request)
  35         else:
  36             form = LoginForm(request.POST, request=request)
  37
  38         if form.is_valid():
  39             try:
  40                 auth_args = dict(username=form.cleaned_data['email'],
  41                                  password=form.cleaned_data['password'])
  42                 if merge:
  43                     # We only want to send the merge argument if it's
  44                     # True. If it it's False, we want it to propagate
  45                     # through the auth backends properly.
  46                     auth_args['merge'] = merge
  47                 user = authenticate(**auth_args)
  48             except SameEmailMismatchedPasswords:
  49                 # Need to merge the accounts?
  50                 if merge:
  51                     # We shouldn't get here...
  52                     raise
  53                 else:
  54                     base_url = reverse('cas_provider_merge')
  55                     args = dict(
  56                         success_redirect=success_redirect,
  57                         email=form.cleaned_data['email'],
  58                         )
  59                     if service is not None:
  60                         args['service'] = service
  61                     args = urllib.urlencode(args)
  62
  63                     return HttpResponseRedirect('%s?%s' % (base_url, args))
  64             if user is not None:
  65                 if user.is_active:
  66                     auth_login(request, user)
  67                     if service is not None:
  68                         ticket = create_service_ticket(user, service)
  69                         return HttpResponseRedirect(service + '?ticket=' + ticket.ticket)
  70                     else:
  71                         return HttpResponseRedirect(success_redirect)
  72                 else:
  73                     errors.append('This account is disabled.')
  74             else:
  75                     errors.append('Incorrect username and/or password.')
  76     else:
  77         if merge:
  78             form = MergeLoginForm(initial={'service': service, 'email': request.GET.get('email')})
  79         else:
  80             form = LoginForm(initial={'service': service})
  81     return render_to_response(template_name, {'form': form, 'errors': errors}, context_instance=RequestContext(request))
  82
  83
  84 def socialauth_login(request, template_name='cas/login.html', success_redirect='/account/'):
  85     """ Similiar to login but user has been authenticated already through social auth.
  86         This step authenticates the login and generates a service ticket.
  87     """
  88     user = request.user
  89     user.backend = 'django.contrib.auth.backends.ModelBackend'
  90     if request.session.has_key('service'):
  91         service = request.session['service']
  92         del request.session['service']
  93     else:
  94         service = '/'
  95     errors = []
  96     if user is not None:
  97         if user.is_active:
  98             auth_login(request, user)
  99             if service is not None:
 100                 ticket = create_service_ticket(user, service)
 101                 return HttpResponseRedirect(service + '?ticket=' + ticket.ticket)
 102             else:
 103                 return HttpResponseRedirect(success_redirect)
 104         else:
 105             errors.append('This account is disabled.')
 106     else:
 107             errors.append('Incorrect username and/or password.')
 108     return render_to_response(template_name, {'errors': errors}, context_instance=RequestContext(request))
 109
 110
 111 def validate(request):
 112     service = request.GET.get('service', None)
 113     ticket_string = request.GET.get('ticket', None)
 114     if service is not None and ticket_string is not None:
 115         try:
 116             ticket = ServiceTicket.objects.get(ticket=ticket_string)
 117             username = ticket.user.username
 118             ticket.delete()
 119             return HttpResponse("yes\n%s\n" % username)
 120         except:
 121             pass
 122     return HttpResponse("no\n\n")
 123
 124
 125 def logout(request, template_name='cas/logout.html'):
 126     url = request.GET.get('url', None)
 127     auth_logout(request)
 128     return render_to_response(template_name, {'url': url}, context_instance=RequestContext(request))