cas_provider/views.py

   1 import logging
   2 logger = logging.getLogger('cas_provider.views')
   3 import urllib
   4
   5 from django.http import HttpResponse, HttpResponseRedirect
   6 from django.shortcuts import render_to_response
   7 from django.template import RequestContext
   8 from django.contrib.auth import authenticate
   9 from django.contrib.auth import login as auth_login, logout as auth_logout
  10 from django.core.urlresolvers import reverse
  11
  12 from forms import LoginForm, MergeLoginForm
  13 from models import ServiceTicket
  14 from utils import create_service_ticket
  15 from exceptions import SameEmailMismatchedPasswords
  16
  17 from . import signals
  18
  19 __all__ = ['login', 'validate', 'logout']
  20
  21
  22 def login(request, template_name='cas/login.html', success_redirect='/account/', merge=False):
  23     logging.debug('CAS Provider Login view. Method is %s, merge is %s, template is %s.',
  24                   request.method, merge, template_name)
  25     service = request.GET.get('service', None)
  26     if service is not None:
  27         request.session['service'] = service
  28     if request.user.is_authenticated():
  29         if service is not None:
  30             ticket = create_service_ticket(request.user, service)
  31             if service.find('?') == -1:
  32                 url = service + '?ticket=' + ticket.ticket
  33                 logging.debug('Redirecting to %s', url)
  34                 return HttpResponseRedirect(url)
  35             else:
  36                 url = service + '&ticket=' + ticket.ticket
  37                 logging.debug('Redirecting to %s', url)
  38                 return HttpResponseRedirect()
  39         else:
  40             logging.debug('Redirecting to %s', success_redirect)
  41             return HttpResponseRedirect(success_redirect)
  42     errors = []
  43     if request.method == 'POST':
  44         if merge:
  45             form = MergeLoginForm(request.POST, request=request)
  46         else:
  47             form = LoginForm(request.POST, request=request)
  48
  49         if form.is_valid():
  50             service = form.cleaned_data.get('service', None)
  51             try:
  52                 auth_args = dict(username=form.cleaned_data['email'],
  53                                  password=form.cleaned_data['password'])
  54                 if merge:
  55                     # We only want to send the merge argument if it's
  56                     # True. If it it's False, we want it to propagate
  57                     # through the auth backends properly.
  58                     auth_args['merge'] = merge
  59                 user = authenticate(**auth_args)
  60             except SameEmailMismatchedPasswords:
  61                 # Need to merge the accounts?
  62                 if merge:
  63                     # We shouldn't get here...
  64                     raise
  65                 else:
  66                     base_url = reverse('cas_provider_merge')
  67                     args = dict(
  68                         success_redirect=success_redirect,
  69                         email=form.cleaned_data['email'],
  70                         )
  71                     if service is not None:
  72                         args['service'] = service
  73                     args = urllib.urlencode(args)
  74
  75                     url = '%s?%s' % (base_url, args)
  76                     logging.debug('Redirecting to %s', url)
  77                     return HttpResponseRedirect(url)
  78
  79             if user is not None:
  80                 if user.is_active:
  81                     auth_login(request, user)
  82                     if service is not None:
  83                         ticket = create_service_ticket(user, service)
  84                         url = service + '?ticket=' + ticket.ticket
  85                         logging.debug('Redirecting to %s', url)
  86                         return HttpResponseRedirect(url)
  87                     else:
  88                         logging.debug('Redirecting to %s', success_redirect)
  89                         return HttpResponseRedirect(success_redirect)
  90                 else:
  91                     errors.append('This account is disabled.')
  92             else:
  93                     errors.append('Incorrect username and/or password.')
  94     else:
  95         if merge:
  96             form = MergeLoginForm(initial={'service': service, 'email': request.GET.get('email')})
  97         else:
  98             form = LoginForm(initial={'service': service})
  99     logging.debug('Rendering response on %s, merge is %s', template_name, merge)
 100     return render_to_response(template_name, {'form': form, 'errors': errors}, context_instance=RequestContext(request))
 101
 102
 103 def socialauth_login(request, template_name='cas/login.html', success_redirect='/account/'):
 104     """ Similiar to login but user has been authenticated already through social auth.
 105         This step authenticates the login and generates a service ticket.
 106     """
 107     user = request.user
 108     user.backend = 'django.contrib.auth.backends.ModelBackend'
 109     if request.session.has_key('service'):
 110         service = request.session['service']
 111         del request.session['service']
 112     else:
 113         service = '/'
 114     errors = []
 115     if user is not None:
 116         if user.is_active:
 117             auth_login(request, user)
 118             if service is not None:
 119                 ticket = create_service_ticket(user, service)
 120                 return HttpResponseRedirect(service + '?ticket=' + ticket.ticket)
 121             else:
 122                 return HttpResponseRedirect(success_redirect)
 123         else:
 124             errors.append('This account is disabled.')
 125     else:
 126             errors.append('Incorrect username and/or password.')
 127     return render_to_response(template_name, {'errors': errors}, context_instance=RequestContext(request))
 128
 129
 130 def validate(request):
 131     service = request.GET.get('service', None)
 132     ticket_string = request.GET.get('ticket', None)
 133     logger.info('Validating ticket %s for %s', ticket_string, service)
 134     if service is not None and ticket_string is not None:
 135         try:
 136             ticket = ServiceTicket.objects.get(ticket=ticket_string)
 137         except ServiceTicket.DoesNotExist:
 138             logger.exception("Tried to validate with an invalid ticket %s for %s", ticket_string, service)
 139         else:
 140             username = ticket.user.username
 141             ticket.delete()
 142
 143             results = signals.on_cas_collect_histories.send(sender=validate, for_email=ticket.user.email)
 144             histories = '\n'.join('\n'.join(rs) for rc, rs in results)
 145             logger.info('Validated %s %s', username, "(also %s)" % histories if histories else '')
 146             return HttpResponse("yes\n%s\n%s" % (username, histories))
 147
 148     return HttpResponse("no\n\n")
 149
 150
 151 def logout(request, template_name='cas/logout.html'):
 152     url = request.GET.get('url', None)
 153     auth_logout(request)
 154     return render_to_response(template_name, {'url': url}, context_instance=RequestContext(request))