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