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