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 forum.http_responses import HttpResponseUnauthorized
   7 from django.utils.safestring import mark_safe
   8 from django.utils.translation import ugettext as _
   9 from django.utils.http import urlquote_plus
  10 from django.utils.encoding import smart_unicode
  11 from forum.views.decorators import login_required
  12 from forum.modules import decorate
  13 from django.contrib.auth import login, logout
  14 from django.http import get_host
  15 from forum.actions import SuspendAction
  16 from forum.utils import html
  17 from forum import settings
  18 from writers import manage_pending_data
  19 import types
  20 import datetime
  21 import logging
  22
  23 from forum.forms import SimpleRegistrationForm, TemporaryLoginRequestForm, \
  24         ChangePasswordForm, SetPasswordForm
  25 from forum.utils.mail import send_template_email
  26
  27 from forum.authentication.base import InvalidAuthentication
  28 from forum.authentication import AUTH_PROVIDERS
  29
  30 from forum.models import AuthKeyUserAssociation, ValidationHash, Question, Answer
  31 from forum.actions import UserJoinsAction
  32
  33 from forum.settings import REP_GAIN_BY_EMAIL_VALIDATION
  34 from vars import ON_SIGNIN_SESSION_ATTR, PENDING_SUBMISSION_SESSION_ATTR
  35
  36 def signin_page(request):
  37     referer = request.META.get('HTTP_REFERER', '/')
  38
  39     # If the referer is equal to the sign up page, e. g. if the previous login attempt was not successful we do not
  40     # change the sign in URL. The user should go to the same page.
  41     if not referer.replace(settings.APP_URL, '') == reverse('auth_signin'):
  42         request.session[ON_SIGNIN_SESSION_ATTR] = referer
  43
  44     all_providers = [provider.context for provider in AUTH_PROVIDERS.values() if provider.context]
  45
  46     sort = lambda c1, c2: c1.weight - c2.weight
  47     can_show = lambda c: not request.user.is_authenticated() or c.show_to_logged_in_user
  48
  49     bigicon_providers = sorted([
  50     context for context in all_providers if context.mode == 'BIGICON' and can_show(context)
  51     ], sort)
  52
  53     smallicon_providers = sorted([
  54     context for context in all_providers if context.mode == 'SMALLICON' and can_show(context)
  55     ], sort)
  56
  57     top_stackitem_providers = sorted([
  58     context for context in all_providers if context.mode == 'TOP_STACK_ITEM' and can_show(context)
  59     ], sort)
  60
  61     stackitem_providers = sorted([
  62     context for context in all_providers if context.mode == 'STACK_ITEM' and can_show(context)
  63     ], sort)
  64
  65     try:
  66         msg = request.session['auth_error']
  67         del request.session['auth_error']
  68     except:
  69         msg = None
  70
  71     return render_to_response(
  72             'auth/signin.html',
  73             {
  74             'msg': msg,
  75             'all_providers': all_providers,
  76             'bigicon_providers': bigicon_providers,
  77             'top_stackitem_providers': top_stackitem_providers,
  78             'stackitem_providers': stackitem_providers,
  79             'smallicon_providers': smallicon_providers,
  80             },
  81             RequestContext(request))
  82
  83 def prepare_provider_signin(request, provider):
  84     force_email_request = request.REQUEST.get('validate_email', 'yes') == 'yes'
  85     request.session['force_email_request'] = force_email_request
  86
  87     if provider in AUTH_PROVIDERS:
  88         provider_class = AUTH_PROVIDERS[provider].consumer
  89
  90         try:
  91             request_url = provider_class.prepare_authentication_request(request,
  92                                                                         reverse('auth_provider_done',
  93                                                                                 kwargs={'provider': provider}))
  94
  95             return HttpResponseRedirect(request_url)
  96         except NotImplementedError, e:
  97             return process_provider_signin(request, provider)
  98         except InvalidAuthentication, e:
  99             request.session['auth_error'] = e.message
 100
 101         return HttpResponseRedirect(reverse('auth_signin'))
 102     else:
 103         raise Http404()
 104
 105
 106 def process_provider_signin(request, provider):
 107     if provider in AUTH_PROVIDERS:
 108         provider_class = AUTH_PROVIDERS[provider].consumer
 109
 110         try:
 111             assoc_key = provider_class.process_authentication_request(request)
 112         except InvalidAuthentication, e:
 113             request.session['auth_error'] = e.message
 114             return HttpResponseRedirect(reverse('auth_signin'))
 115
 116         if request.user.is_authenticated():
 117             if isinstance(assoc_key, (type, User)):
 118                 if request.user != assoc_key:
 119                     request.session['auth_error'] = _(
 120                             "Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again."
 121                             )
 122                 else:
 123                     request.session['auth_error'] = _("You are already logged in with that user.")
 124             else:
 125                 try:
 126                     assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 127                     if assoc.user == request.user:
 128                         request.session['auth_error'] = _(
 129                                 "These login credentials are already associated with your account.")
 130                     else:
 131                         request.session['auth_error'] = _(
 132                                 "Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again."
 133                                 )
 134                 except:
 135                     uassoc = AuthKeyUserAssociation(user=request.user, key=assoc_key, provider=provider)
 136                     uassoc.save()
 137                     request.user.message_set.create(
 138                             message=_('The new credentials are now associated with your account'))
 139                     return HttpResponseRedirect(reverse('user_authsettings', args=[request.user.id]))
 140
 141             return HttpResponseRedirect(reverse('auth_signin'))
 142         else:
 143             if isinstance(assoc_key, User):
 144                 return login_and_forward(request, assoc_key)
 145
 146         try:
 147             assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 148             user_ = assoc.user
 149             return login_and_forward(request, user_)
 150         except AuthKeyUserAssociation.DoesNotExist:
 151             request.session['assoc_key'] = assoc_key
 152             request.session['auth_provider'] = provider
 153             return HttpResponseRedirect(reverse('auth_external_register'))
 154
 155     return HttpResponseRedirect(reverse('auth_signin'))
 156
 157 def external_register(request):
 158     if request.method == 'POST' and 'bnewaccount' in request.POST:
 159         form1 = SimpleRegistrationForm(request.POST)
 160
 161         if form1.is_valid():
 162             user_ = User(username=form1.cleaned_data['username'], email=form1.cleaned_data['email'])
 163             user_.email_isvalid = request.session.get('auth_validated_email', '') == form1.cleaned_data['email']
 164             user_.set_unusable_password()
 165
 166             if User.objects.all().count() == 0:
 167                 user_.is_superuser = True
 168                 user_.is_staff = True
 169
 170             user_.save()
 171             UserJoinsAction(user=user_, ip=request.META['REMOTE_ADDR']).save()
 172
 173             try:
 174                 assoc_key = request.session['assoc_key']
 175                 auth_provider = request.session['auth_provider']
 176             except:
 177                 request.session['auth_error'] = _(
 178                         "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."
 179                         )
 180                 logging.error("Missing session data when trying to complete user registration: %s" % ", ".join(
 181                         ["%s: %s" % (k, v) for k, v in request.META.items()]))
 182                 return HttpResponseRedirect(reverse('auth_signin'))
 183
 184             uassoc = AuthKeyUserAssociation(user=user_, key=assoc_key, provider=auth_provider)
 185             uassoc.save()
 186
 187             del request.session['assoc_key']
 188             del request.session['auth_provider']
 189
 190             return login_and_forward(request, user_, message=_("A welcome email has been sent to your email address. "))
 191     else:
 192         auth_provider = request.session.get('auth_provider', None)
 193         if not auth_provider:
 194             request.session['auth_error'] = _(
 195                     "Oops, something went wrong in the middle of this process. Please try again.")
 196             logging.error("Missing session data when trying to complete user registration: %s" % ", ".join(
 197                     ["%s: %s" % (k, v) for k, v in request.META.items()]))
 198             return HttpResponseRedirect(reverse('auth_signin'))
 199
 200         provider_class = AUTH_PROVIDERS[auth_provider].consumer
 201
 202         # Pass the cookies to the Facebook authentication class get_user_data method. We need them to take the access token.
 203         if provider_class.__class__.__name__ == 'FacebookAuthConsumer':
 204             user_data = provider_class.get_user_data(request.COOKIES)
 205         else:
 206             user_data = provider_class.get_user_data(request.session['assoc_key'])
 207
 208         if not user_data:
 209             user_data = request.session.get('auth_consumer_data', {})
 210
 211         username = user_data.get('username', '')
 212         email = user_data.get('email', '')
 213
 214         if email:
 215             request.session['auth_validated_email'] = email
 216
 217         form1 = SimpleRegistrationForm(initial={
 218         'next': '/',
 219         'username': username,
 220         'email': email,
 221         })
 222
 223     provider_context = AUTH_PROVIDERS[request.session['auth_provider']].context
 224
 225     return render_to_response('auth/complete.html', {
 226     'form1': form1,
 227     'provider':provider_context and mark_safe(provider_context.human_name) or _('unknown'),
 228     'login_type':provider_context.id,
 229     'gravatar_faq_url':reverse('faq') + '#gravatar',
 230     }, context_instance=RequestContext(request))
 231
 232 def request_temp_login(request):
 233     if request.method == 'POST':
 234         form = TemporaryLoginRequestForm(request.POST)
 235
 236         if form.is_valid():
 237             users = form.user_cache
 238
 239             for u in users:
 240                 if u.is_suspended():
 241                     return forward_suspended_user(request, u, False)
 242
 243             for u in users:
 244                 try:
 245                     hash = get_object_or_404(ValidationHash, user=u, type='templogin')
 246                     if hash.expiration < datetime.datetime.now():
 247                         hash.delete()
 248                         return request_temp_login(request)
 249                 except:
 250                     hash = ValidationHash.objects.create_new(u, 'templogin', [u.id])
 251
 252                 send_template_email([u], "auth/temp_login_email.html", {'temp_login_code': hash})
 253
 254                 request.user.message_set.create(message=_("An email has been sent with your temporary login key"))
 255
 256             return HttpResponseRedirect(reverse('index'))
 257     else:
 258         form = TemporaryLoginRequestForm()
 259
 260     return render_to_response(
 261             'auth/temp_login_request.html', {'form': form},
 262             context_instance=RequestContext(request))
 263
 264 def temp_signin(request, user, code):
 265     user = get_object_or_404(User, id=user)
 266
 267     if (ValidationHash.objects.validate(code, user, 'templogin', [user.id])):
 268
 269         # If the user requests temp_signin he must have forgotten his password. So we mark it as unusable.
 270         user.set_unusable_password()
 271         user.save()
 272
 273         return login_and_forward(request, user, reverse('user_authsettings', kwargs={'id': user.id}),
 274                                  _(
 275                                          "You are logged in with a temporary access key, please take the time to fix your issue with authentication."
 276                                          ))
 277     else:
 278         raise Http404()
 279
 280 def send_validation_email(request):
 281     if not request.user.is_authenticated():
 282         return HttpResponseUnauthorized(request)
 283     else:
 284         # We check if there are some old validation hashes. If there are -- we delete them.
 285         try:
 286             hash = ValidationHash.objects.get(user=request.user, type='email')
 287             hash.delete()
 288         except:
 289             pass
 290
 291         # We don't care if there are previous cashes in the database... In every case we have to create a new one
 292         hash = ValidationHash.objects.create_new(request.user, 'email', [request.user.email])
 293
 294         send_template_email([request.user], "auth/mail_validation.html", {'validation_code': hash})
 295         request.user.message_set.create(message=_("A message with an email validation link was just sent to your address."))
 296         return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))
 297
 298
 299
 300 def validate_email(request, user, code):
 301     user = get_object_or_404(User, id=user)
 302
 303     if (ValidationHash.objects.validate(code, user, 'email', [user.email])):
 304         user.email_isvalid = True
 305         user.save()
 306         return login_and_forward(request, user, reverse('index'), _("Thank you, your email is now validated."))
 307     else:
 308         return render_to_response('auth/mail_already_validated.html', { 'user' : user }, RequestContext(request))
 309
 310 def auth_settings(request, id):
 311     user_ = get_object_or_404(User, id=id)
 312
 313     if not (request.user.is_superuser or request.user == user_):
 314         return HttpResponseUnauthorized(request)
 315
 316     auth_keys = user_.auth_keys.all()
 317
 318     if request.user.is_superuser or (not user_.has_usable_password()):
 319         FormClass = SetPasswordForm
 320     else:
 321         FormClass = ChangePasswordForm
 322
 323     if request.POST:
 324         form = FormClass(request.POST, user=user_)
 325         if form.is_valid():
 326             is_new_pass = not user_.has_usable_password()
 327             user_.set_password(form.cleaned_data['password1'])
 328             user_.save()
 329
 330             if is_new_pass:
 331                 request.user.message_set.create(message=_("New password set"))
 332                 if not request.user.is_superuser:
 333                     form = ChangePasswordForm(user=user_)
 334             else:
 335                 request.user.message_set.create(message=_("Your password was changed"))
 336
 337             return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': user_.id}))
 338     else:
 339         form = FormClass(user=user_)
 340
 341     auth_keys_list = []
 342
 343     for k in auth_keys:
 344         provider = AUTH_PROVIDERS.get(k.provider, None)
 345
 346         if provider is not None:
 347             name =  "%s: %s" % (provider.context.human_name, provider.context.readable_key(k))
 348         else:
 349             from forum.authentication.base import ConsumerTemplateContext
 350             "unknown: %s" % ConsumerTemplateContext.readable_key(k)
 351
 352         auth_keys_list.append({
 353         'name': name,
 354         'id': k.id
 355         })
 356
 357     return render_to_response('auth/auth_settings.html', {
 358     'view_user': user_,
 359     "can_view_private": (user_ == request.user) or request.user.is_superuser,
 360     'form': form,
 361     'has_password': user_.has_usable_password(),
 362     'auth_keys': auth_keys_list,
 363     'allow_local_auth': AUTH_PROVIDERS.get('local', None),
 364     }, context_instance=RequestContext(request))
 365
 366 def remove_external_provider(request, id):
 367     association = get_object_or_404(AuthKeyUserAssociation, id=id)
 368     if not (request.user.is_superuser or request.user == association.user):
 369         return HttpResponseUnauthorized(request)
 370
 371     request.user.message_set.create(message=_("You removed the association with %s") % association.provider)
 372     association.delete()
 373     return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': association.user.id}))
 374
 375 def login_and_forward(request, user, forward=None, message=None):
 376     if user.is_suspended():
 377         return forward_suspended_user(request, user)
 378
 379     user.backend = "django.contrib.auth.backends.ModelBackend"
 380     login(request, user)
 381
 382     if message is None:
 383         message = _("Welcome back %s, you are now logged in") % smart_unicode(user.username)
 384
 385     request.user.message_set.create(message=message)
 386
 387     if not forward:
 388         forward = request.session.get(ON_SIGNIN_SESSION_ATTR, reverse('index'))
 389
 390     pending_data = request.session.get(PENDING_SUBMISSION_SESSION_ATTR, None)
 391
 392     if pending_data and (user.email_isvalid or pending_data['type'] not in settings.REQUIRE_EMAIL_VALIDATION_TO):
 393         submission_time = pending_data['time']
 394         if submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.HOLD_PENDING_POSTS_MINUTES)):
 395             del request.session[PENDING_SUBMISSION_SESSION_ATTR]
 396         elif submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.WARN_PENDING_POSTS_MINUTES)):
 397             user.message_set.create(message=(_("You have a %s pending submission.") % pending_data['data_name']) + " %s, %s, %s" % (
 398                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('save')}), _("save it")),
 399                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('review')}), _("review")),
 400                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('cancel')}), _("cancel"))
 401             ))
 402         else:
 403             return manage_pending_data(request, _('save'), forward)
 404
 405     return HttpResponseRedirect(forward)
 406
 407 def forward_suspended_user(request, user, show_private_msg=True):
 408     message = _("Sorry, but this account is suspended")
 409     if show_private_msg:
 410         msg_type = 'privatemsg'
 411     else:
 412         msg_type = 'publicmsg'
 413
 414     suspension = user.suspension
 415     if suspension:
 416         message += (":<br />" + suspension.extra.get(msg_type, ''))
 417
 418     request.user.message_set.create(message)
 419     return HttpResponseRedirect(reverse('index'))
 420
 421 @decorate.withfn(login_required)
 422 def signout(request):
 423     logout(request)
 424     return HttpResponseRedirect(reverse('index'))