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