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