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
   6 from forum.http_responses import HttpResponseUnauthorized
   7 from django.utils.safestring import mark_safe
   8 from django.utils.translation import ugettext as _
   9 from django.utils.http import urlquote_plus
  10 from django.contrib.auth.decorators import login_required
  11 from django.contrib.auth import login, logout
  12 from django.http import get_host
  13 from forum.actions import SuspendAction
  14 import types
  15 import datetime
  16 import logging
  17
  18 from forum.forms import SimpleRegistrationForm, SimpleEmailSubscribeForm, \
  19         TemporaryLoginRequestForm, ChangePasswordForm, SetPasswordForm
  20 from forum.utils.mail import send_email, send_template_email
  21
  22 from forum.authentication.base import InvalidAuthentication
  23 from forum.authentication import AUTH_PROVIDERS
  24
  25 from forum.models import AuthKeyUserAssociation, ValidationHash, Question, Answer
  26 from forum.actions import UserJoinsAction
  27
  28 def signin_page(request, action=None):
  29     if action is None:
  30         request.session['on_signin_url'] = request.META.get('HTTP_REFERER', '/')
  31     else:
  32         request.session['on_signin_action'] = action
  33         request.session['on_signin_url'] = reverse('auth_action_signin', kwargs={'action': action})
  34
  35     all_providers = [provider.context for provider in AUTH_PROVIDERS.values()]
  36
  37     sort = lambda c1, c2: c1.weight - c2.weight
  38     can_show = lambda c: not request.user.is_authenticated() or c.show_to_logged_in_user
  39
  40     bigicon_providers = sorted([
  41     context for context in all_providers if context.mode == 'BIGICON' and can_show(context)
  42     ], sort)
  43
  44     smallicon_providers = sorted([
  45     context for context in all_providers if context.mode == 'SMALLICON' and can_show(context)
  46     ], sort)
  47
  48     top_stackitem_providers = sorted([
  49     context for context in all_providers if context.mode == 'TOP_STACK_ITEM' and can_show(context)
  50     ], sort)
  51
  52     stackitem_providers = sorted([
  53     context for context in all_providers if context.mode == 'STACK_ITEM' and can_show(context)
  54     ], sort)
  55
  56     try:
  57         msg = request.session['auth_error']
  58         del request.session['auth_error']
  59     except:
  60         msg = None
  61
  62     return render_to_response(
  63             'auth/signin.html',
  64             {
  65             'msg': msg,
  66             'all_providers': all_providers,
  67             'bigicon_providers': bigicon_providers,
  68             'top_stackitem_providers': top_stackitem_providers,
  69             'stackitem_providers': stackitem_providers,
  70             'smallicon_providers': smallicon_providers,
  71             },
  72             RequestContext(request))
  73
  74 def prepare_provider_signin(request, provider):
  75     force_email_request = request.REQUEST.get('validate_email', 'yes') == 'yes'
  76     request.session['force_email_request'] = force_email_request
  77
  78     if provider in AUTH_PROVIDERS:
  79         provider_class = AUTH_PROVIDERS[provider].consumer
  80
  81         try:
  82             request_url = provider_class.prepare_authentication_request(request,
  83                                                                         reverse('auth_provider_done',
  84                                                                                 kwargs={'provider': provider}))
  85
  86             return HttpResponseRedirect(request_url)
  87         except NotImplementedError, e:
  88             return process_provider_signin(request, provider)
  89         except InvalidAuthentication, e:
  90             request.session['auth_error'] = e.message
  91
  92         return HttpResponseRedirect(reverse('auth_signin'))
  93     else:
  94         raise Http404()
  95
  96
  97 def process_provider_signin(request, provider):
  98     if provider in AUTH_PROVIDERS:
  99         provider_class = AUTH_PROVIDERS[provider].consumer
 100
 101         try:
 102             assoc_key = provider_class.process_authentication_request(request)
 103         except InvalidAuthentication, e:
 104             request.session['auth_error'] = e.message
 105             return HttpResponseRedirect(reverse('auth_signin'))
 106
 107         if request.user.is_authenticated():
 108             if isinstance(assoc_key, (type, User)):
 109                 if request.user != assoc_key:
 110                     request.session['auth_error'] = _(
 111                             "Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again."
 112                             )
 113                 else:
 114                     request.session['auth_error'] = _("You are already logged in with that user.")
 115             else:
 116                 try:
 117                     assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 118                     if assoc.user == request.user:
 119                         request.session['auth_error'] = _(
 120                                 "These login credentials are already associated with your account.")
 121                     else:
 122                         request.session['auth_error'] = _(
 123                                 "Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again."
 124                                 )
 125                 except:
 126                     uassoc = AuthKeyUserAssociation(user=request.user, key=assoc_key, provider=provider)
 127                     uassoc.save()
 128                     request.user.message_set.create(
 129                             message=_('The new credentials are now associated with your account'))
 130                     return HttpResponseRedirect(reverse('user_authsettings', args=[request.user.id]))
 131
 132             return HttpResponseRedirect(reverse('auth_signin'))
 133         else:
 134             if isinstance(assoc_key, User):
 135                 return login_and_forward(request, assoc_key)
 136
 137         try:
 138             assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 139             user_ = assoc.user
 140             return login_and_forward(request, user_)
 141         except:
 142             request.session['assoc_key'] = assoc_key
 143             request.session['auth_provider'] = provider
 144             return HttpResponseRedirect(reverse('auth_external_register'))
 145
 146     return HttpResponseRedirect(reverse('auth_signin'))
 147
 148 def external_register(request):
 149     if request.method == 'POST' and 'bnewaccount' in request.POST:
 150         form1 = SimpleRegistrationForm(request.POST)
 151         email_feeds_form = SimpleEmailSubscribeForm(request.POST)
 152
 153         if (form1.is_valid() and email_feeds_form.is_valid()):
 154             user_ = User(username=form1.cleaned_data['username'], email=form1.cleaned_data['email'])
 155             user_.email_isvalid = request.session.get('auth_validated_email', '') == form1.cleaned_data['email']
 156             user_.set_unusable_password()
 157
 158             if User.objects.all().count() == 0:
 159                 user_.is_superuser = True
 160                 user_.is_staff = True
 161
 162             user_.save()
 163             UserJoinsAction(user=user_, ip=request.META['REMOTE_ADDR']).save()
 164
 165             try:
 166                 assoc_key = request.session['assoc_key']
 167                 auth_provider = request.session['auth_provider']
 168             except:
 169                 request.session['auth_error'] = _(
 170                         "Oops, something went wrong in the middle of this process. Please try again. Note that you need to have cookies enabled for the authentication to work."
 171                         )
 172                 logging.error("Missing session data when trying to complete user registration: %s" % ", ".join(
 173                         ["%s: %s" % (k, v) for k, v in request.META.items()]))
 174                 return HttpResponseRedirect(reverse('auth_signin'))
 175
 176             uassoc = AuthKeyUserAssociation(user=user_, key=assoc_key, provider=auth_provider)
 177             uassoc.save()
 178
 179             if email_feeds_form.cleaned_data['subscribe'] == 'n':
 180                 user_.subscription_settings.enable_notifications = False
 181                 user_.subscription_settings.save()
 182
 183             del request.session['assoc_key']
 184             del request.session['auth_provider']
 185
 186             return login_and_forward(request, user_, message=_("A welcome email has been sent to your email address. "))
 187     else:
 188         auth_provider = request.session.get('auth_provider', None)
 189         if not auth_provider:
 190             request.session['auth_error'] = _(
 191                     "Oops, something went wrong in the middle of this process. Please try again.")
 192             logging.error("Missing session data when trying to complete user registration: %s" % ", ".join(
 193                     ["%s: %s" % (k, v) for k, v in request.META.items()]))
 194             return HttpResponseRedirect(reverse('auth_signin'))
 195
 196         provider_class = AUTH_PROVIDERS[auth_provider].consumer
 197         user_data = provider_class.get_user_data(request.session['assoc_key'])
 198
 199         if not user_data:
 200             user_data = request.session.get('auth_consumer_data', {})
 201
 202         username = user_data.get('username', '')
 203         email = user_data.get('email', '')
 204
 205         if email:
 206             request.session['auth_validated_email'] = email
 207
 208         form1 = SimpleRegistrationForm(initial={
 209         'next': '/',
 210         'username': username,
 211         'email': email,
 212         })
 213         email_feeds_form = SimpleEmailSubscribeForm()
 214
 215     provider_context = AUTH_PROVIDERS[request.session['auth_provider']].context
 216
 217     return render_to_response('auth/complete.html', {
 218     'form1': form1,
 219     'email_feeds_form': email_feeds_form,
 220     'provider':mark_safe(provider_context.human_name),
 221     'login_type':provider_context.id,
 222     'gravatar_faq_url':reverse('faq') + '#gravatar',
 223     }, context_instance=RequestContext(request))
 224
 225 def request_temp_login(request):
 226     if request.method == 'POST':
 227         form = TemporaryLoginRequestForm(request.POST)
 228
 229         if form.is_valid():
 230             user = form.user_cache
 231
 232             if user.is_suspended():
 233                 return forward_suspended_user(request, user, False)
 234
 235             try:
 236                 hash = get_object_or_404(ValidationHash, user=user, type='templogin')
 237                 if hash.expiration < datetime.datetime.now():
 238                     hash.delete()
 239                     return request_temp_login(request)
 240             except:
 241                 hash = ValidationHash.objects.create_new(user, 'templogin', [user.id])
 242
 243             send_template_email([user], "auth/temp_login_email.html", {'temp_login_code': hash})
 244
 245             request.user.message_set.create(message=_("An email has been sent with your temporary login key"))
 246
 247             return HttpResponseRedirect(reverse('index'))
 248     else:
 249         form = TemporaryLoginRequestForm()
 250
 251     return render_to_response(
 252             'auth/temp_login_request.html', {'form': form},
 253             context_instance=RequestContext(request))
 254
 255 def temp_signin(request, user, code):
 256     user = get_object_or_404(User, id=user)
 257
 258     if (ValidationHash.objects.validate(code, user, 'templogin', [user.id])):
 259         return login_and_forward(request, user, reverse('user_authsettings', kwargs={'id': user.id}),
 260                                  _(
 261                                          "You are logged in with a temporary access key, please take the time to fix your issue with authentication."
 262                                          ))
 263     else:
 264         raise Http404()
 265
 266 def validate_email(request, user, code):
 267     user = get_object_or_404(User, id=user)
 268
 269     if (ValidationHash.objects.validate(code, user, 'email', [user.email])):
 270         user.email_isvalid = True
 271         user.save()
 272         return login_and_forward(request, user, None, _("Thank you, your email is now validated."))
 273     else:
 274         raise Http404()
 275
 276 @login_required
 277 def auth_settings(request, id):
 278     user_ = get_object_or_404(User, id=id)
 279
 280     if not (request.user.is_superuser or request.user == user_):
 281         return HttpResponseUnauthorized(request)
 282
 283     auth_keys = user_.auth_keys.all()
 284
 285     if request.user.is_superuser or (not user_.has_usable_password()):
 286         FormClass = SetPasswordForm
 287     else:
 288         FormClass = ChangePasswordForm
 289
 290     if request.POST:
 291         form = FormClass(request.POST, user=user_)
 292         if form.is_valid():
 293             is_new_pass = not user_.has_usable_password()
 294             user_.set_password(form.cleaned_data['password1'])
 295             user_.save()
 296
 297             if is_new_pass:
 298                 request.user.message_set.create(message=_("New password set"))
 299                 if not request.user.is_superuser:
 300                     form = ChangePasswordForm(user=user_)
 301             else:
 302                 request.user.message_set.create(message=_("Your password was changed"))
 303
 304             return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': user_.id}))
 305     else:
 306         form = FormClass(user=user_)
 307
 308     auth_keys_list = []
 309
 310     for k in auth_keys:
 311         provider = AUTH_PROVIDERS.get(k.provider, None)
 312
 313         if provider is not None:
 314             name =  "%s: %s" % (provider.context.human_name, provider.context.readable_key(k))
 315         else:
 316             from forum.authentication.base import ConsumerTemplateContext
 317             "unknown: %s" % ConsumerTemplateContext.readable_key(k)
 318
 319         auth_keys_list.append({
 320         'name': name,
 321         'id': k.id
 322         })
 323
 324     return render_to_response('auth/auth_settings.html', {
 325     'view_user': user_,
 326     "can_view_private": (user_ == request.user) or request.user.is_superuser,
 327     'form': form,
 328     'has_password': user_.has_usable_password(),
 329     'auth_keys': auth_keys_list,
 330     }, context_instance=RequestContext(request))
 331
 332 def remove_external_provider(request, id):
 333     association = get_object_or_404(AuthKeyUserAssociation, id=id)
 334     if not (request.user.is_superuser or request.user == association.user):
 335         return HttpResponseUnauthorized(request)
 336
 337     request.user.message_set.create(message=_("You removed the association with %s") % association.provider)
 338     association.delete()
 339     return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': association.user.id}))
 340
 341 def newquestion_signin_action(user):
 342     question = Question.objects.filter(author=user).order_by('-added_at')[0]
 343     return question.get_absolute_url()
 344
 345 def newanswer_signin_action(user):
 346     answer = Answer.objects.filter(author=user).order_by('-added_at')[0]
 347     return answer.get_absolute_url()
 348
 349 POST_SIGNIN_ACTIONS = {
 350 'newquestion': newquestion_signin_action,
 351 'newanswer': newanswer_signin_action,
 352 }
 353
 354 def login_and_forward(request, user, forward=None, message=None):
 355     if user.is_suspended():
 356         return forward_suspended_user(request, user)
 357
 358     user.backend = "django.contrib.auth.backends.ModelBackend"
 359     login(request, user)
 360
 361     temp_data = request.session.pop('temp_node_data', None)
 362     if temp_data:
 363         request.POST = temp_data
 364         node_type = request.session.pop('temp_node_type')
 365
 366         if node_type == "question":
 367             from forum.views.writers import ask
 368             return ask(request)
 369         elif node_type == "answer":
 370             from forum.views.writers import answer
 371             return answer(request, request.session.pop('temp_question_id'))
 372
 373     if not forward:
 374         signin_action = request.session.get('on_signin_action', None)
 375         if not signin_action:
 376             forward = request.session.get('on_signin_url', None)
 377
 378             if not forward:
 379                 forward = reverse('index')
 380         else:
 381             try:
 382                 forward = POST_SIGNIN_ACTIONS[signin_action](user)
 383             except:
 384                 forward = reverse('index')
 385
 386     if message is None:
 387         message = _("Welcome back %s, you are now logged in") % user.username
 388
 389     request.user.message_set.create(message=message)
 390     return HttpResponseRedirect(forward)
 391
 392 def forward_suspended_user(request, user, show_private_msg=True):
 393     message = _("Sorry, but this account is suspended")
 394     if show_private_msg:
 395         msg_type = 'privatemsg'
 396     else:
 397         msg_type = 'publicmsg'
 398
 399     suspension = user.suspension
 400     if suspension:
 401         message += (":<br />" + suspension.extra.get(msg_type, ''))
 402
 403     request.user.message_set.create(message)
 404     return HttpResponseRedirect(reverse('index'))
 405
 406 @login_required
 407 def signout(request):
 408     logout(request)
 409     return HttpResponseRedirect(reverse('index'))