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                 user_.is_staff = True
 151
 152             user_.save()
 153             UserJoinsAction(user=user_, ip=request.META['REMOTE_ADDR']).save()
 154
 155             if not user_.email_isvalid:
 156                 send_validation_email(user_)
 157
 158             try:
 159                 assoc_key = request.session['assoc_key']
 160                 auth_provider = request.session['auth_provider']
 161             except:
 162                 request.session['auth_error'] = _("Oops, something went wrong in the middle of this process. Please try again.")
 163                 return HttpResponseRedirect(request.session.get('on_signin_url', reverse('auth_signin')))
 164
 165             uassoc = AuthKeyUserAssociation(user=user_, key=assoc_key, provider=auth_provider)
 166             uassoc.save()
 167
 168             if email_feeds_form.cleaned_data['subscribe'] == 'n':
 169                 user_.subscription_settings.enable_notifications = False
 170                 user_.subscription_settings.save()
 171
 172             del request.session['assoc_key']
 173             del request.session['auth_provider']
 174
 175             return login_and_forward(request, user_)
 176     else:
 177         provider_class = AUTH_PROVIDERS[request.session['auth_provider']].consumer
 178         user_data = provider_class.get_user_data(request.session['assoc_key'])
 179
 180         if not user_data:
 181             user_data = request.session.get('auth_consumer_data', {})
 182
 183         username = user_data.get('username', '')
 184         email = user_data.get('email', '')
 185
 186         if email:
 187             request.session['auth_validated_email'] = email
 188
 189         form1 = SimpleRegistrationForm(initial={
 190             'next': '/',
 191             'username': username,
 192             'email': email,
 193         })
 194         email_feeds_form = SimpleEmailSubscribeForm()
 195
 196     provider_context = AUTH_PROVIDERS[request.session['auth_provider']].context
 197
 198     return render_to_response('auth/complete.html', {
 199         'form1': form1,
 200         'email_feeds_form': email_feeds_form,
 201         'provider':mark_safe(provider_context.human_name),
 202         'login_type':provider_context.id,
 203         'gravatar_faq_url':reverse('faq') + '#gravatar',
 204     }, context_instance=RequestContext(request))
 205
 206 def request_temp_login(request):
 207     if request.method == 'POST':
 208         form = TemporaryLoginRequestForm(request.POST)
 209
 210         if form.is_valid():
 211             user = form.user_cache
 212
 213             try:
 214                 hash = get_object_or_404(ValidationHash, user=user, type='templogin')
 215                 if hash.expiration < datetime.datetime.now():
 216                     hash.delete()
 217                     return request_temp_login(request)
 218             except:
 219                 hash = ValidationHash.objects.create_new(user, 'templogin', [user.id])
 220
 221             send_email(_("Temporary login link"), [(user.username, user.email)], "auth/temp_login_email.html", {
 222                 'temp_login_code': hash,
 223                 'user': user
 224             })
 225
 226             request.user.message_set.create(message=_("An email has been sent with your temporary login key"))
 227
 228             return HttpResponseRedirect(reverse('index'))
 229     else:
 230         form = TemporaryLoginRequestForm()
 231
 232     return render_to_response(
 233             'auth/temp_login_request.html', {'form': form},
 234             context_instance=RequestContext(request))
 235
 236 def temp_signin(request, user, code):
 237     user = get_object_or_404(User, id=user)
 238
 239     if (ValidationHash.objects.validate(code, user, 'templogin', [user.id])):
 240         return login_and_forward(request,  user, reverse('user_authsettings', kwargs={'id': user.id}),
 241                 _("You are logged in with a temporary access key, please take the time to fix your issue with authentication."))
 242     else:
 243         raise Http404()
 244
 245 def send_validation_email(user):
 246     hash = ValidationHash.objects.create_new(user, 'email', [user.email])
 247     send_email(_("Email Validation"), [(user.username, user.email)], "auth/email_validation.html", {
 248         'validation_code': hash,
 249         'user': user
 250     })
 251
 252 def validate_email(request, user, code):
 253     user = get_object_or_404(User, id=user)
 254
 255     if (ValidationHash.objects.validate(code, user, 'email', [user.email])):
 256         user.email_isvalid = True
 257         user.save()
 258         return login_and_forward(request,  user, None, _("Thank you, your email is now validated."))
 259     else:
 260         raise Http404()
 261
 262 @login_required
 263 def auth_settings(request, id):
 264     user_ = get_object_or_404(User, id=id)
 265
 266     if not (request.user.is_superuser or request.user == user_):
 267         return HttpResponseForbidden()
 268
 269     auth_keys = user_.auth_keys.all()
 270
 271     if request.user.is_superuser or (not user_.has_usable_password()):
 272         FormClass = SetPasswordForm
 273     else:
 274         FormClass = ChangePasswordForm
 275
 276     if request.POST:
 277         form = FormClass(request.POST, user=user_)
 278         if form.is_valid():
 279             if user_.has_usable_password():
 280                 request.user.message_set.create(message=_("Your password was changed"))
 281             else:
 282                 request.user.message_set.create(message=_("New password set"))
 283                 if not request.user.is_superuser:
 284                     form = ChangePasswordForm(user=user_)
 285
 286             user_.set_password(form.cleaned_data['password1'])
 287             user_.save()
 288             return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': user_.id}))
 289     else:
 290         form = FormClass(user=user_)
 291
 292     auth_keys_list = []
 293
 294     for k in auth_keys:
 295         provider = AUTH_PROVIDERS.get(k.provider, None)
 296
 297         if provider is not None:
 298             name =  "%s: %s" % (provider.context.human_name, provider.context.readable_key(k))
 299         else:
 300             from forum.authentication.base import ConsumerTemplateContext
 301             "unknown: %s" % ConsumerTemplateContext.readable_key(k)
 302
 303         auth_keys_list.append({
 304             'name': name,
 305             'id': k.id
 306         })
 307
 308     return render_to_response('auth/auth_settings.html', {
 309         'view_user': user_,
 310         "can_view_private": (user_ == request.user) or request.user.is_superuser,
 311         'form': form,
 312         'has_password': user_.has_usable_password(),
 313         'auth_keys': auth_keys_list,
 314     }, context_instance=RequestContext(request))
 315
 316 def remove_external_provider(request, id):
 317     association = get_object_or_404(AuthKeyUserAssociation, id=id)
 318     if not (request.user.is_superuser or request.user == association.user):
 319         return HttpResponseForbidden()
 320
 321     request.user.message_set.create(message=_("You removed the association with %s") % association.provider)
 322     association.delete()
 323     return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': association.user.id}))
 324
 325 def newquestion_signin_action(user):
 326     question = Question.objects.filter(author=user).order_by('-added_at')[0]
 327     return question.get_absolute_url()
 328
 329 def newanswer_signin_action(user):
 330     answer = Answer.objects.filter(author=user).order_by('-added_at')[0]
 331     return answer.get_absolute_url()
 332
 333 POST_SIGNIN_ACTIONS = {
 334     'newquestion': newquestion_signin_action,
 335     'newanswer': newanswer_signin_action,
 336 }
 337
 338 def login_and_forward(request,  user, forward=None, message=None):
 339     old_session = request.session.session_key
 340     user.backend = "django.contrib.auth.backends.ModelBackend"
 341     login(request,  user)
 342
 343     temp_data = request.session.pop('temp_node_data', None)
 344     if temp_data:
 345         request.POST = temp_data
 346         node_type = request.session.pop('temp_node_type')
 347
 348         if node_type == "question":
 349             from forum.views.writers import ask
 350             return ask(request)
 351         elif node_type == "answer":
 352             from forum.views.writers import answer
 353             return answer(request, request.session.pop('temp_question_id'))
 354
 355     if not forward:
 356         signin_action = request.session.get('on_signin_action', None)
 357         if not signin_action:
 358             forward = request.session.get('on_signin_url', None)
 359
 360             if not forward:
 361                 forward = reverse('index')
 362         else:
 363             try:
 364                 forward = POST_SIGNIN_ACTIONS[signin_action](user)
 365             except:
 366                 forward = reverse('index')
 367
 368     if message is None:
 369         message = _("Welcome back %s, you are now logged in") % user.username
 370
 371     request.user.message_set.create(message=message)
 372     return HttpResponseRedirect(forward)
 373
 374 @login_required
 375 def signout(request):
 376     """
 377     signout from the website. Remove openid from session and kill it.
 378
 379     url : /signout/"
 380     """
 381
 382     logout(request)
 383     return HttpResponseRedirect(reverse('index'))