forum/views/auth.py

   1 from django.shortcuts import render_to_response, get_object_or_404
   2 from django.template import RequestContext
   3 from django.core.urlresolvers import reverse
   4 from forum.models import User
   5 from django.http import HttpResponseRedirect, Http404, HttpResponseForbidden
   6 from django.utils.safestring import mark_safe
   7 from django.utils.translation import ugettext as _
   8 from django.utils.http import urlquote_plus
   9 from django.contrib.auth.decorators import login_required
  10 from django.contrib.auth import login,  logout
  11 from django.http import get_host
  12 import types
  13 import datetime
  14
  15 from forum.authentication.forms import SimpleRegistrationForm, SimpleEmailSubscribeForm, \
  16         TemporaryLoginRequestForm, ChangePasswordForm, SetPasswordForm
  17 from forum.utils.mail import send_email
  18
  19 from forum.authentication.base import InvalidAuthentication
  20 from forum.authentication import AUTH_PROVIDERS
  21
  22 from forum.models import AuthKeyUserAssociation, ValidationHash, Question, Answer
  23 from forum.actions import UserJoinsAction
  24
  25 def signin_page(request, action=None):
  26     if action is None:
  27         request.session['on_signin_url'] = request.META.get('HTTP_REFERER', '/')
  28     else:
  29         request.session['on_signin_action'] = action
  30         request.session['on_signin_url'] = reverse('auth_action_signin', kwargs={'action': action})
  31
  32     all_providers = [provider.context for provider in AUTH_PROVIDERS.values()]
  33
  34     sort = lambda c1, c2: c1.weight - c2.weight
  35     can_show = lambda c: not request.user.is_authenticated() or c.show_to_logged_in_user
  36
  37     bigicon_providers = sorted([
  38         context for context in all_providers if context.mode == 'BIGICON' and can_show(context)
  39     ], sort)
  40
  41     smallicon_providers = sorted([
  42         context for context in all_providers if context.mode == 'SMALLICON' and can_show(context)
  43     ], sort)
  44
  45     top_stackitem_providers = sorted([
  46         context for context in all_providers if context.mode == 'TOP_STACK_ITEM' and can_show(context)
  47     ], sort)
  48
  49     stackitem_providers = sorted([
  50         context for context in all_providers if context.mode == 'STACK_ITEM' and can_show(context)
  51     ], sort)
  52
  53     try:
  54         msg = request.session['auth_error']
  55         del request.session['auth_error']
  56     except:
  57         msg = None
  58
  59     return render_to_response(
  60             'auth/signin.html',
  61             {
  62                 'msg': msg,
  63                 'all_providers': all_providers,
  64                 'bigicon_providers': bigicon_providers,
  65                 'top_stackitem_providers': top_stackitem_providers,
  66                 'stackitem_providers': stackitem_providers,
  67                 'smallicon_providers': smallicon_providers,
  68             },
  69             RequestContext(request))
  70
  71 def prepare_provider_signin(request, provider):
  72     force_email_request = request.REQUEST.get('validate_email', 'yes') == 'yes'
  73     request.session['force_email_request'] = force_email_request
  74
  75     if provider in AUTH_PROVIDERS:
  76         provider_class = AUTH_PROVIDERS[provider].consumer
  77
  78         try:
  79             request_url = provider_class.prepare_authentication_request(request,
  80                     reverse('auth_provider_done', kwargs={'provider': provider}))
  81
  82             return HttpResponseRedirect(request_url)
  83         except NotImplementedError, e:
  84             return process_provider_signin(request, provider)
  85         except InvalidAuthentication, e:
  86             request.session['auth_error'] = e.message
  87
  88         return HttpResponseRedirect(reverse('auth_signin'))
  89     else:
  90         raise Http404()
  91
  92
  93 def process_provider_signin(request, provider):
  94     if provider in AUTH_PROVIDERS:
  95         provider_class = AUTH_PROVIDERS[provider].consumer
  96
  97         try:
  98             assoc_key = provider_class.process_authentication_request(request)
  99         except InvalidAuthentication, e:
 100             request.session['auth_error'] = e.message
 101             return HttpResponseRedirect(reverse('auth_signin'))
 102
 103         if request.user.is_authenticated():
 104             if isinstance(assoc_key, (type, User)):
 105                 if request.user != assoc_key:
 106                     request.session['auth_error'] = _("Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again.")
 107                 else:
 108                     request.session['auth_error'] = _("You are already logged in with that user.")
 109             else:
 110                 try:
 111                     assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 112                     if assoc.user == request.user:
 113                         request.session['auth_error'] = _("These login credentials are already associated with your account.")
 114                     else:
 115                         request.session['auth_error'] = _("Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again.")
 116                 except:
 117                     uassoc = AuthKeyUserAssociation(user=request.user, key=assoc_key, provider=provider)
 118                     uassoc.save()
 119                     request.user.message_set.create(message=_('The new credentials are now associated with your account'))
 120                     return HttpResponseRedirect(reverse('user_authsettings', args=[request.user.id]))
 121
 122             return HttpResponseRedirect(reverse('auth_signin'))
 123         else:
 124             if isinstance(assoc_key, User):
 125                 return login_and_forward(request, assoc_key)
 126
 127         try:
 128             assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 129             user_ = assoc.user
 130             return login_and_forward(request, user_)
 131         except:
 132             request.session['assoc_key'] = assoc_key
 133             request.session['auth_provider'] = provider
 134             return HttpResponseRedirect(reverse('auth_external_register'))
 135
 136     return HttpResponseRedirect(reverse('auth_signin'))
 137
 138 def external_register(request):
 139     if request.method == 'POST' and 'bnewaccount' in request.POST:
 140         form1 = SimpleRegistrationForm(request.POST)
 141         email_feeds_form = SimpleEmailSubscribeForm(request.POST)
 142
 143         if (form1.is_valid() and email_feeds_form.is_valid()):
 144             user_ = User(username=form1.cleaned_data['username'], email=form1.cleaned_data['email'])
 145             user_.email_isvalid = request.session.get('auth_validated_email', '') == form1.cleaned_data['email']
 146             user_.set_unusable_password()
 147
 148             if User.objects.all().count() == 0:
 149                 user_.is_superuser = True
 150
 151             user_.save()
 152             UserJoinsAction(user=user_, ip=request.META['REMOTE_ADDR']).save()
 153
 154             if not user_.email_isvalid:
 155                 send_validation_email(user_)
 156
 157             try:
 158                 assoc_key = request.session['assoc_key']
 159                 auth_provider = request.session['auth_provider']
 160             except:
 161                 request.session['auth_error'] = _("Oops, something went wrong in the middle of this process. Please try again.")
 162                 return HttpResponseRedirect(request.session.get('on_signin_url', reverse('auth_signin')))
 163
 164             uassoc = AuthKeyUserAssociation(user=user_, key=assoc_key, provider=auth_provider)
 165             uassoc.save()
 166
 167             if email_feeds_form.cleaned_data['subscribe'] == 'n':
 168                 user_.subscription_settings.enable_notifications = False
 169                 user_.subscription_settings.save()
 170
 171             del request.session['assoc_key']
 172             del request.session['auth_provider']
 173
 174             return login_and_forward(request, user_)
 175     else:
 176         provider_class = AUTH_PROVIDERS[request.session['auth_provider']].consumer
 177         user_data = provider_class.get_user_data(request.session['assoc_key'])
 178
 179         if not user_data:
 180             user_data = request.session.get('auth_consumer_data', {})
 181
 182         username = user_data.get('username', '')
 183         email = user_data.get('email', '')
 184
 185         if email:
 186             request.session['auth_validated_email'] = email
 187
 188         form1 = SimpleRegistrationForm(initial={
 189             'next': '/',
 190             'username': username,
 191             'email': email,
 192         })
 193         email_feeds_form = SimpleEmailSubscribeForm()
 194
 195     provider_context = AUTH_PROVIDERS[request.session['auth_provider']].context
 196
 197     return render_to_response('auth/complete.html', {
 198         'form1': form1,
 199         'email_feeds_form': email_feeds_form,
 200         'provider':mark_safe(provider_context.human_name),
 201         'login_type':provider_context.id,
 202         'gravatar_faq_url':reverse('faq') + '#gravatar',
 203     }, context_instance=RequestContext(request))
 204
 205 def request_temp_login(request):
 206     if request.method == 'POST':
 207         form = TemporaryLoginRequestForm(request.POST)
 208
 209         if form.is_valid():
 210             user = form.user_cache
 211
 212             try:
 213                 hash = get_object_or_404(ValidationHash, user=user, type='templogin')
 214                 if hash.expiration < datetime.datetime.now():
 215                     hash.delete()
 216                     return request_temp_login(request)
 217             except:
 218                 hash = ValidationHash.objects.create_new(user, 'templogin', [user.id])
 219
 220             send_email(_("Temporary login link"), [(user.username, user.email)], "auth/temp_login_email.html", {
 221                 'temp_login_code': hash,
 222                 'user': user
 223             })
 224
 225             request.user.message_set.create(message=_("An email has been sent with your temporary login key"))
 226
 227             return HttpResponseRedirect(reverse('index'))
 228     else:
 229         form = TemporaryLoginRequestForm()
 230
 231     return render_to_response(
 232             'auth/temp_login_request.html', {'form': form},
 233             context_instance=RequestContext(request))
 234
 235 def temp_signin(request, user, code):
 236     user = get_object_or_404(User, id=user)
 237
 238     if (ValidationHash.objects.validate(code, user, 'templogin', [user.id])):
 239         return login_and_forward(request,  user, reverse('user_authsettings', kwargs={'id': user.id}),
 240                 _("You are logged in with a temporary access key, please take the time to fix your issue with authentication."))
 241     else:
 242         raise Http404()
 243
 244 def send_validation_email(user):
 245     hash = ValidationHash.objects.create_new(user, 'email', [user.email])
 246     send_email(_("Email Validation"), [(user.username, user.email)], "auth/email_validation.html", {
 247         'validation_code': hash,
 248         'user': user
 249     })
 250
 251 def validate_email(request, user, code):
 252     user = get_object_or_404(User, id=user)
 253
 254     if (ValidationHash.objects.validate(code, user, 'email', [user.email])):
 255         user.email_isvalid = True
 256         user.save()
 257         return login_and_forward(request,  user, None, _("Thank you, your email is now validated."))
 258     else:
 259         raise Http404()
 260
 261 @login_required
 262 def auth_settings(request, id):
 263     user_ = get_object_or_404(User, id=id)
 264
 265     if not (request.user.is_superuser or request.user == user_):
 266         return HttpResponseForbidden()
 267
 268     auth_keys = user_.auth_keys.all()
 269
 270     if user_.has_usable_password():
 271         FormClass = ChangePasswordForm
 272     else:
 273         FormClass = SetPasswordForm
 274
 275     if request.POST:
 276         form = FormClass(request.POST, user=user_)
 277         if form.is_valid():
 278             if user_.has_usable_password():
 279                 request.user.message_set.create(message=_("Your password was changed"))
 280             else:
 281                 request.user.message_set.create(message=_("New password set"))
 282                 FormClass = ChangePasswordForm
 283
 284             user_.set_password(form.cleaned_data['password1'])
 285             user_.save()
 286             return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': user_.id}))
 287
 288     form = FormClass(user=user_)
 289
 290     auth_keys_list = []
 291
 292     for k in auth_keys:
 293         provider = AUTH_PROVIDERS.get(k.provider, None)
 294
 295         if provider is not None:
 296             name =  "%s: %s" % (provider.context.human_name, provider.context.readable_key(k))
 297         else:
 298             from forum.authentication.base import ConsumerTemplateContext
 299             "unknown: %s" % ConsumerTemplateContext.readable_key(k)
 300
 301         auth_keys_list.append({
 302             'name': name,
 303             'id': k.id
 304         })
 305
 306     return render_to_response('auth/auth_settings.html', {
 307         'view_user': user_,
 308         "can_view_private": (user_ == request.user) or request.user.is_superuser,
 309         'form': form,
 310         'has_password': user_.has_usable_password(),
 311         'auth_keys': auth_keys_list,
 312     }, context_instance=RequestContext(request))
 313
 314 def remove_external_provider(request, id):
 315     association = get_object_or_404(AuthKeyUserAssociation, id=id)
 316     if not (request.user.is_superuser or request.user == association.user):
 317         return HttpResponseForbidden()
 318
 319     request.user.message_set.create(message=_("You removed the association with %s") % association.provider)
 320     association.delete()
 321     return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': association.user.id}))
 322
 323 def newquestion_signin_action(user):
 324     question = Question.objects.filter(author=user).order_by('-added_at')[0]
 325     return question.get_absolute_url()
 326
 327 def newanswer_signin_action(user):
 328     answer = Answer.objects.filter(author=user).order_by('-added_at')[0]
 329     return answer.get_absolute_url()
 330
 331 POST_SIGNIN_ACTIONS = {
 332     'newquestion': newquestion_signin_action,
 333     'newanswer': newanswer_signin_action,
 334 }
 335
 336 def login_and_forward(request,  user, forward=None, message=None):
 337     old_session = request.session.session_key
 338     user.backend = "django.contrib.auth.backends.ModelBackend"
 339     login(request,  user)
 340
 341     temp_data = request.session.pop('temp_node_data', None)
 342     if temp_data:
 343         request.POST = temp_data
 344         node_type = request.session.pop('temp_node_type')
 345
 346         if node_type == "question":
 347             from forum.views.writers import ask
 348             return ask(request)
 349         elif node_type == "answer":
 350             from forum.views.writers import answer
 351             return answer(request, request.session.pop('temp_question_id'))
 352
 353     if not forward:
 354         signin_action = request.session.get('on_signin_action', None)
 355         if not signin_action:
 356             forward = request.session.get('on_signin_url', None)
 357
 358             if not forward:
 359                 forward = reverse('index')
 360         else:
 361             try:
 362                 forward = POST_SIGNIN_ACTIONS[signin_action](user)
 363             except:
 364                 forward = reverse('index')
 365
 366     if message is None:
 367         message = _("Welcome back %s, you are now logged in") % user.username
 368
 369     request.user.message_set.create(message=message)
 370     return HttpResponseRedirect(forward)
 371
 372 @login_required
 373 def signout(request):
 374     """
 375     signout from the website. Remove openid from session and kill it.
 376
 377     url : /signout/"
 378     """
 379
 380     logout(request)
 381     return HttpResponseRedirect(reverse('index'))