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
  90
  91 def process_provider_signin(request, provider):
  92     if provider in AUTH_PROVIDERS:
  93         provider_class = AUTH_PROVIDERS[provider].consumer
  94
  95         try:
  96             assoc_key = provider_class.process_authentication_request(request)
  97         except InvalidAuthentication, e:
  98             request.session['auth_error'] = e.message
  99             return HttpResponseRedirect(reverse('auth_signin'))
 100
 101         if request.user.is_authenticated():
 102             if isinstance(assoc_key, (type, User)):
 103                 if request.user != assoc_key:
 104                     request.session['auth_error'] = _("Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again.")
 105                 else:
 106                     request.session['auth_error'] = _("You are already logged in with that user.")
 107             else:
 108                 try:
 109                     assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 110                     if assoc.user == request.user:
 111                         request.session['auth_error'] = _("These login credentials are already associated with your account.")
 112                     else:
 113                         request.session['auth_error'] = _("Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again.")
 114                 except:
 115                     uassoc = AuthKeyUserAssociation(user=request.user, key=assoc_key, provider=provider)
 116                     uassoc.save()
 117                     request.user.message_set.create(message=_('The new credentials are now associated with your account'))
 118                     return HttpResponseRedirect(reverse('user_authsettings'))
 119
 120             return HttpResponseRedirect(reverse('auth_signin'))
 121         else:
 122             if isinstance(assoc_key, User):
 123                 return login_and_forward(request, assoc_key)
 124
 125         try:
 126             assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 127             user_ = assoc.user
 128             return login_and_forward(request, user_)
 129         except:
 130             request.session['assoc_key'] = assoc_key
 131             request.session['auth_provider'] = provider
 132             return HttpResponseRedirect(reverse('auth_external_register'))
 133
 134     return HttpResponseRedirect(reverse('auth_signin'))
 135
 136 def external_register(request):
 137     if request.method == 'POST' and 'bnewaccount' in request.POST:
 138         form1 = SimpleRegistrationForm(request.POST)
 139         email_feeds_form = SimpleEmailSubscribeForm(request.POST)
 140
 141         if (form1.is_valid() and email_feeds_form.is_valid()):
 142             user_ = User(username=form1.cleaned_data['username'], email=form1.cleaned_data['email'])
 143             user_.email_isvalid = request.session.get('auth_validated_email', '') == form1.cleaned_data['email']
 144             user_.set_unusable_password()
 145
 146             if User.objects.all().count() == 0:
 147                 user_.is_superuser = True
 148
 149             user_.save()
 150             UserJoinsAction(user=user_, ip=request.META['REMOTE_ADDR']).save()
 151
 152             if not user_.email_isvalid:
 153                 send_validation_email(user_)
 154
 155             try:
 156                 assoc_key = request.session['assoc_key']
 157                 auth_provider = request.session['auth_provider']
 158             except:
 159                 request.session['auth_error'] = _("Oops, something went wrong in the middle of this process. Please try again.")
 160                 return HttpResponseRedirect(request.session.get('on_signin_url', reverse('auth_signin')))
 161
 162             uassoc = AuthKeyUserAssociation(user=user_, key=assoc_key, provider=auth_provider)
 163             uassoc.save()
 164
 165             if email_feeds_form.cleaned_data['subscribe'] == 'n':
 166                 user_.subscription_settings.enable_notifications = False
 167                 user_.subscription_settings.save()
 168
 169             del request.session['assoc_key']
 170             del request.session['auth_provider']
 171
 172             return login_and_forward(request, user_)
 173     else:
 174         provider_class = AUTH_PROVIDERS[request.session['auth_provider']].consumer
 175         user_data = provider_class.get_user_data(request.session['assoc_key'])
 176
 177         if not user_data:
 178             user_data = request.session.get('auth_consumer_data', {})
 179
 180         username = user_data.get('username', '')
 181         email = user_data.get('email', '')
 182
 183         if email:
 184             request.session['auth_validated_email'] = email
 185
 186         form1 = SimpleRegistrationForm(initial={
 187             'next': '/',
 188             'username': username,
 189             'email': email,
 190         })
 191         email_feeds_form = SimpleEmailSubscribeForm()
 192
 193     provider_context = AUTH_PROVIDERS[request.session['auth_provider']].context
 194
 195     return render_to_response('auth/complete.html', {
 196         'form1': form1,
 197         'email_feeds_form': email_feeds_form,
 198         'provider':mark_safe(provider_context.human_name),
 199         'login_type':provider_context.id,
 200         'gravatar_faq_url':reverse('faq') + '#gravatar',
 201     }, context_instance=RequestContext(request))
 202
 203 def request_temp_login(request):
 204     if request.method == 'POST':
 205         form = TemporaryLoginRequestForm(request.POST)
 206
 207         if form.is_valid():
 208             user = form.user_cache
 209
 210             try:
 211                 hash = get_object_or_404(ValidationHash, user=user, type='templogin')
 212                 if hash.expiration < datetime.datetime.now():
 213                     hash.delete()
 214                     return request_temp_login(request)
 215             except:
 216                 hash = ValidationHash.objects.create_new(user, 'templogin', [user.id])
 217
 218             send_email(_("Temporary login link"), [(user.username, user.email)], "auth/temp_login_email.html", {
 219                 'temp_login_code': hash,
 220                 'user': user
 221             })
 222
 223             request.user.message_set.create(message=_("An email has been sent with your temporary login key"))
 224
 225             return HttpResponseRedirect(reverse('index'))
 226     else:
 227         form = TemporaryLoginRequestForm()
 228
 229     return render_to_response(
 230             'auth/temp_login_request.html', {'form': form},
 231             context_instance=RequestContext(request))
 232
 233 def temp_signin(request, user, code):
 234     user = get_object_or_404(User, id=user)
 235
 236     if (ValidationHash.objects.validate(code, user, 'templogin', [user.id])):
 237         return login_and_forward(request,  user, reverse('user_authsettings'),
 238                 _("You are logged in with a temporary access key, please take the time to fix your issue with authentication."))
 239     else:
 240         raise Http404()
 241
 242 def send_validation_email(user):
 243     hash = ValidationHash.objects.create_new(user, 'email', [user.email])
 244     send_email(_("Email Validation"), [(user.username, user.email)], "auth/email_validation.html", {
 245         'validation_code': hash,
 246         'user': user
 247     })
 248
 249 def validate_email(request, user, code):
 250     user = get_object_or_404(User, id=user)
 251
 252     if (ValidationHash.objects.validate(code, user, 'email', [user.email])):
 253         user.email_isvalid = True
 254         user.save()
 255         return login_and_forward(request,  user, None, _("Thank you, your email is now validated."))
 256     else:
 257         raise Http404()
 258
 259 @login_required
 260 def auth_settings(request):
 261     """
 262     change password view.
 263
 264     url : /changepw/
 265     template: authopenid/changepw.html
 266     """
 267     user_ = request.user
 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'))
 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         'form': form,
 308         'has_password': user_.has_usable_password(),
 309         'auth_keys': auth_keys_list,
 310     }, context_instance=RequestContext(request))
 311
 312 def remove_external_provider(request, id):
 313     association = get_object_or_404(AuthKeyUserAssociation, id=id)
 314     if not association.user == request.user:
 315         return HttpResponseForbidden()
 316     request.user.message_set.create(message=_("You removed the association with %s") % association.provider)
 317     association.delete()
 318     return HttpResponseRedirect(reverse('user_authsettings'))
 319
 320 def newquestion_signin_action(user):
 321     question = Question.objects.filter(author=user).order_by('-added_at')[0]
 322     return question.get_absolute_url()
 323
 324 def newanswer_signin_action(user):
 325     answer = Answer.objects.filter(author=user).order_by('-added_at')[0]
 326     return answer.get_absolute_url()
 327
 328 POST_SIGNIN_ACTIONS = {
 329     'newquestion': newquestion_signin_action,
 330     'newanswer': newanswer_signin_action,
 331 }
 332
 333 def login_and_forward(request,  user, forward=None, message=None):
 334     old_session = request.session.session_key
 335     user.backend = "django.contrib.auth.backends.ModelBackend"
 336     login(request,  user)
 337
 338     temp_data = request.session.pop('temp_node_data', None)
 339     if temp_data:
 340         request.POST = temp_data
 341         node_type = request.session.pop('temp_node_type')
 342
 343         if node_type == "question":
 344             from forum.views.writers import ask
 345             return ask(request)
 346         elif node_type == "answer":
 347             from forum.views.writers import answer
 348             return answer(request, request.session.pop('temp_question_id'))
 349
 350     if not forward:
 351         signin_action = request.session.get('on_signin_action', None)
 352         if not signin_action:
 353             forward = request.session.get('on_signin_url', None)
 354
 355             if not forward:
 356                 forward = reverse('index')
 357         else:
 358             try:
 359                 forward = POST_SIGNIN_ACTIONS[signin_action](user)
 360             except:
 361                 forward = reverse('index')
 362
 363     if message is None:
 364         message = _("Welcome back %s, you are now logged in") % user.username
 365
 366     request.user.message_set.create(message=message)
 367     return HttpResponseRedirect(forward)
 368
 369 @login_required
 370 def signout(request):
 371     """
 372     signout from the website. Remove openid from session and kill it.
 373
 374     url : /signout/"
 375     """
 376
 377     logout(request)
 378     return HttpResponseRedirect(reverse('index'))