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             try:
  51                 auth_args = dict(username=form.cleaned_data['email'],
  52                                  password=form.cleaned_data['password'])
  53                 if merge:
  54                     # We only want to send the merge argument if it's
  55                     # True. If it it's False, we want it to propagate
  56                     # through the auth backends properly.
  57                     auth_args['merge'] = merge
  58                 user = authenticate(**auth_args)
  59             except SameEmailMismatchedPasswords:
  60                 # Need to merge the accounts?
  61                 if merge:
  62                     # We shouldn't get here...
  63                     raise
  64                 else:
  65                     base_url = reverse('cas_provider_merge')
  66                     args = dict(
  67                         success_redirect=success_redirect,
  68                         email=form.cleaned_data['email'],
  69                         )
  70                     if service is not None:
  71                         args['service'] = service
  72                     args = urllib.urlencode(args)
  73
  74                     url = '%s?%s' % (base_url, args)
  75                     logging.debug('Redirecting to %s', url)
  76                     return HttpResponseRedirect(url)
  77
  78             if user is not None:
  79                 if user.is_active:
  80                     auth_login(request, user)
  81                     if service is not None:
  82                         ticket = create_service_ticket(user, service)
  83                         url = service + '?ticket=' + ticket.ticket
  84                         logging.debug('Redirecting to %s', url)
  85                         return HttpResponseRedirect(url)
  86                     else:
  87                         logging.debug('Redirecting to %s', success_redirect)
  88                         return HttpResponseRedirect(success_redirect)
  89                 else:
  90                     errors.append('This account is disabled.')
  91             else:
  92                     errors.append('Incorrect username and/or password.')
  93     else:
  94         if merge:
  95             form = MergeLoginForm(initial={'service': service, 'email': request.GET.get('email')})
  96         else:
  97             form = LoginForm(initial={'service': service})
  98     logging.debug('Rendering response on %s, merge is %s', template_name, merge)
  99     return render_to_response(template_name, {'form': form, 'errors': errors}, context_instance=RequestContext(request))
 100
 101
 102 def socialauth_login(request, template_name='cas/login.html', success_redirect='/account/'):
 103     """ Similiar to login but user has been authenticated already through social auth.
 104         This step authenticates the login and generates a service ticket.
 105     """
 106     user = request.user
 107     user.backend = 'django.contrib.auth.backends.ModelBackend'
 108     if request.session.has_key('service'):
 109         service = request.session['service']
 110         del request.session['service']
 111     else:
 112         service = '/'
 113     errors = []
 114     if user is not None:
 115         if user.is_active:
 116             auth_login(request, user)
 117             if service is not None:
 118                 ticket = create_service_ticket(user, service)
 119                 return HttpResponseRedirect(service + '?ticket=' + ticket.ticket)
 120             else:
 121                 return HttpResponseRedirect(success_redirect)
 122         else:
 123             errors.append('This account is disabled.')
 124     else:
 125             errors.append('Incorrect username and/or password.')
 126     return render_to_response(template_name, {'errors': errors}, context_instance=RequestContext(request))
 127
 128
 129 def validate(request):
 130     service = request.GET.get('service', None)
 131     ticket_string = request.GET.get('ticket', None)
 132     logger.debug("service: %s"% service)
 133     logger.debug("ticket_string: %s"% ticket_string)
 134     if service is not None and ticket_string is not None:
 135         try:
 136             ticket = ServiceTicket.objects.get(ticket=ticket_string)
 137             username = ticket.user.username
 138             ticket.delete()
 139
 140             results = signals.on_cas_collect_histories.send(sender=validate, for_email=ticket.user.email)
 141             histories = '\n'.join('\n'.join(rs) for rc, rs in results)
 142
 143             return HttpResponse("yes\n%s\n%s" % (username, histories))
 144
 145         except Exception as e:
 146             logger.exception("Got an exception!: %s"% e)
 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))