forum/views/auth.py

   1 # -*- coding: utf-8 -*-
   2
   3 import datetime
   4 import logging
   5 import urllib
   6
   7 from django.shortcuts import render_to_response, get_object_or_404
   8 from django.template import RequestContext
   9 from django.core.urlresolvers import reverse
  10 from django.http import HttpResponseRedirect, Http404
  11 from django.utils.safestring import mark_safe
  12 from django.utils.translation import ugettext as _
  13 from django.utils.encoding import smart_unicode
  14 from django.contrib.auth import login, logout
  15
  16 from writers import manage_pending_data
  17
  18 from forum.actions import EmailValidationAction
  19 from forum.utils import html
  20 from forum.views.decorators import login_required
  21 from forum.modules import decorate
  22 from forum.forms import SimpleRegistrationForm, TemporaryLoginRequestForm, ChangePasswordForm, SetPasswordForm
  23 from forum.http_responses import HttpResponseUnauthorized
  24 from forum.utils.mail import send_template_email
  25 from forum.authentication.base import InvalidAuthentication
  26 from forum.authentication import AUTH_PROVIDERS
  27 from forum.models import User, AuthKeyUserAssociation, ValidationHash
  28 from forum.actions import UserJoinsAction, UserLoginAction
  29 from forum import settings
  30
  31 from vars import ON_SIGNIN_SESSION_ATTR, PENDING_SUBMISSION_SESSION_ATTR
  32
  33 def signin_page(request):
  34     referer = request.META.get('HTTP_REFERER', '/')
  35
  36     # If the referer is equal to the sign up page, e. g. if the previous login attempt was not successful we do not
  37     # change the sign in URL. The user should go to the same page.
  38     if not referer.replace(settings.APP_URL, '') == reverse('auth_signin'):
  39         request.session[ON_SIGNIN_SESSION_ATTR] = referer
  40
  41     all_providers = [provider.context for provider in AUTH_PROVIDERS.values() if provider.context]
  42
  43     sort = lambda c1, c2: c1.weight - c2.weight
  44     can_show = lambda c: not request.user.is_authenticated() or c.show_to_logged_in_user
  45
  46     bigicon_providers = sorted([
  47     context for context in all_providers if context.mode == 'BIGICON' and can_show(context)
  48     ], sort)
  49
  50     smallicon_providers = sorted([
  51     context for context in all_providers if context.mode == 'SMALLICON' and can_show(context)
  52     ], sort)
  53
  54     top_stackitem_providers = sorted([
  55     context for context in all_providers if context.mode == 'TOP_STACK_ITEM' and can_show(context)
  56     ], sort)
  57
  58     stackitem_providers = sorted([
  59     context for context in all_providers if context.mode == 'STACK_ITEM' and can_show(context)
  60     ], sort)
  61
  62     try:
  63         msg = request.session['auth_error']
  64         del request.session['auth_error']
  65     except:
  66         msg = None
  67
  68     return render_to_response(
  69             'auth/signin.html',
  70             {
  71             'msg': msg,
  72             'all_providers': all_providers,
  73             'bigicon_providers': bigicon_providers,
  74             'top_stackitem_providers': top_stackitem_providers,
  75             'stackitem_providers': stackitem_providers,
  76             'smallicon_providers': smallicon_providers,
  77             },
  78             RequestContext(request))
  79
  80 def prepare_provider_signin(request, provider):
  81     force_email_request = request.REQUEST.get('validate_email', 'yes') == 'yes'
  82     request.session['force_email_request'] = force_email_request
  83
  84     if provider in AUTH_PROVIDERS:
  85         provider_class = AUTH_PROVIDERS[provider].consumer
  86
  87         try:
  88             request_url = provider_class.prepare_authentication_request(request,
  89                                                                         reverse('auth_provider_done',
  90                                                                                 kwargs={'provider': provider}))
  91
  92             return HttpResponseRedirect(request_url)
  93         except NotImplementedError, e:
  94             return process_provider_signin(request, provider)
  95         except InvalidAuthentication, e:
  96             request.session['auth_error'] = e.message
  97
  98         return HttpResponseRedirect(reverse('auth_signin'))
  99     else:
 100         raise Http404()
 101
 102
 103 def process_provider_signin(request, provider):
 104     if provider in AUTH_PROVIDERS:
 105         provider_class = AUTH_PROVIDERS[provider].consumer
 106
 107         try:
 108             assoc_key = provider_class.process_authentication_request(request)
 109         except InvalidAuthentication, e:
 110             request.session['auth_error'] = e.message
 111             return HttpResponseRedirect(reverse('auth_signin'))
 112
 113         if request.user.is_authenticated():
 114             if isinstance(assoc_key, (type, User)):
 115                 if request.user != assoc_key:
 116                     request.session['auth_error'] = _(
 117                             "Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again."
 118                             )
 119                 else:
 120                     request.session['auth_error'] = _("You are already logged in with that user.")
 121             else:
 122                 try:
 123                     assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 124                     if assoc.user == request.user:
 125                         request.session['auth_error'] = _(
 126                                 "These login credentials are already associated with your account.")
 127                     else:
 128                         request.session['auth_error'] = _(
 129                                 "Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again."
 130                                 )
 131                 except:
 132                     uassoc = AuthKeyUserAssociation(user=request.user, key=assoc_key, provider=provider)
 133                     uassoc.save()
 134                     request.user.message_set.create(
 135                             message=_('The new credentials are now associated with your account'))
 136                     return HttpResponseRedirect(reverse('user_authsettings', args=[request.user.id]))
 137
 138             return HttpResponseRedirect(reverse('auth_signin'))
 139         else:
 140             if isinstance(assoc_key, User):
 141                 return login_and_forward(request, assoc_key)
 142
 143         try:
 144             assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 145             user_ = assoc.user
 146             return login_and_forward(request, user_)
 147         except AuthKeyUserAssociation.DoesNotExist:
 148             request.session['assoc_key'] = assoc_key
 149             request.session['auth_provider'] = provider
 150             return HttpResponseRedirect(reverse('auth_external_register'))
 151
 152     return HttpResponseRedirect(reverse('auth_signin'))
 153
 154 def external_register(request):
 155     if request.method == 'POST' and 'bnewaccount' in request.POST:
 156         form1 = SimpleRegistrationForm(request.POST)
 157
 158         if form1.is_valid():
 159             user_ = User(username=form1.cleaned_data['username'], email=form1.cleaned_data['email'])
 160             user_.email_isvalid = request.session.get('auth_validated_email', '') == form1.cleaned_data['email']
 161             user_.set_unusable_password()
 162
 163             if User.objects.all().count() == 0:
 164                 user_.is_superuser = True
 165                 user_.is_staff = True
 166
 167             user_.save()
 168             UserJoinsAction(user=user_, ip=request.META['REMOTE_ADDR']).save()
 169
 170             try:
 171                 assoc_key = request.session['assoc_key']
 172                 auth_provider = request.session['auth_provider']
 173             except:
 174                 request.session['auth_error'] = _(
 175                         "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."
 176                         )
 177                 logging.error("Missing session data when trying to complete user registration: %s" % ", ".join(
 178                         ["%s: %s" % (k, v) for k, v in request.META.items()]))
 179                 return HttpResponseRedirect(reverse('auth_signin'))
 180
 181             uassoc = AuthKeyUserAssociation(user=user_, key=assoc_key, provider=auth_provider)
 182             uassoc.save()
 183
 184             del request.session['assoc_key']
 185             del request.session['auth_provider']
 186
 187             return login_and_forward(request, user_, message=_("A welcome email has been sent to your email address. "))
 188     else:
 189         auth_provider = request.session.get('auth_provider', None)
 190         if not auth_provider:
 191             request.session['auth_error'] = _(
 192                     "Oops, something went wrong in the middle of this process. Please try again.")
 193             logging.error("Missing session data when trying to complete user registration: %s" % ", ".join(
 194                     ["%s: %s" % (k, v) for k, v in request.META.items()]))
 195             return HttpResponseRedirect(reverse('auth_signin'))
 196
 197         provider_class = AUTH_PROVIDERS[auth_provider].consumer
 198
 199         # Pass the cookies to the Facebook authentication class get_user_data method. We need them to take the access token.
 200         if provider_class.__class__.__name__ == 'FacebookAuthConsumer':
 201             user_data = provider_class.get_user_data(request.COOKIES)
 202         else:
 203             user_data = provider_class.get_user_data(request.session['assoc_key'])
 204
 205         if not user_data:
 206             user_data = request.session.get('auth_consumer_data', {})
 207
 208         username = user_data.get('username', '')
 209         email = user_data.get('email', '')
 210
 211         if email:
 212             request.session['auth_validated_email'] = email
 213
 214         form1 = SimpleRegistrationForm(initial={
 215         'next': '/',
 216         'username': username,
 217         'email': email,
 218         })
 219
 220     provider_context = AUTH_PROVIDERS[request.session['auth_provider']].context
 221
 222     return render_to_response('auth/complete.html', {
 223     'form1': form1,
 224     'provider':provider_context and mark_safe(provider_context.human_name) or _('unknown'),
 225     'login_type':provider_context.id,
 226     'gravatar_faq_url':reverse('faq') + '#gravatar',
 227     }, context_instance=RequestContext(request))
 228
 229 def request_temp_login(request):
 230     if request.method == 'POST':
 231         form = TemporaryLoginRequestForm(request.POST)
 232
 233         if form.is_valid():
 234             users = form.user_cache
 235
 236             for u in users:
 237                 if u.is_suspended():
 238                     return forward_suspended_user(request, u, False)
 239
 240             for u in users:
 241                 try:
 242                     hash = get_object_or_404(ValidationHash, user=u, type='templogin')
 243                     if hash.expiration < datetime.datetime.now():
 244                         hash.delete()
 245                         return request_temp_login(request)
 246                 except:
 247                     hash = ValidationHash.objects.create_new(u, 'templogin', [u.id])
 248
 249                 send_template_email([u], "auth/temp_login_email.html", {'temp_login_code': hash})
 250
 251                 request.user.message_set.create(message=_("An email has been sent with your temporary login key"))
 252
 253             return HttpResponseRedirect(reverse('index'))
 254     else:
 255         form = TemporaryLoginRequestForm()
 256
 257     return render_to_response(
 258             'auth/temp_login_request.html', {'form': form},
 259             context_instance=RequestContext(request))
 260
 261 def temp_signin(request, user, code):
 262     user = get_object_or_404(User, id=user)
 263
 264     if (ValidationHash.objects.validate(code, user, 'templogin', [user.id])):
 265
 266         # If the user requests temp_signin he must have forgotten his password. So we mark it as unusable.
 267         user.set_unusable_password()
 268         user.save()
 269
 270         return login_and_forward(request, user, reverse('user_authsettings', kwargs={'id': user.id}),
 271                                  _(
 272                                          "You are logged in with a temporary access key, please take the time to fix your issue with authentication."
 273                                          ))
 274     else:
 275         raise Http404()
 276
 277 def send_validation_email(request):
 278     if not request.user.is_authenticated():
 279         return HttpResponseUnauthorized(request)
 280     else:
 281         # We check if there are some old validation hashes. If there are -- we delete them.
 282         try:
 283             hash = ValidationHash.objects.get(user=request.user, type='email')
 284             hash.delete()
 285         except:
 286             pass
 287
 288         # We don't care if there are previous cashes in the database... In every case we have to create a new one
 289         hash = ValidationHash.objects.create_new(request.user, 'email', [request.user.email])
 290
 291         additional_get_params = urllib.urlencode(request.GET)
 292         send_template_email([request.user], "auth/mail_validation.html", {
 293             'validation_code': hash,
 294             'additional_get_params' : additional_get_params
 295         })
 296
 297         request.user.message_set.create(message=_("A message with an email validation link was just sent to your address."))
 298         return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))
 299
 300
 301
 302 def validate_email(request, user, code):
 303     user = get_object_or_404(User, id=user)
 304
 305     if (ValidationHash.objects.validate(code, user, 'email', [user.email])):
 306         EmailValidationAction(user=user, ip=request.META['REMOTE_ADDR']).save()
 307         return login_and_forward(request, user, reverse('index'), _("Thank you, your email is now validated."))
 308     else:
 309         return render_to_response('auth/mail_already_validated.html', { 'user' : user }, RequestContext(request))
 310
 311 def auth_settings(request, id):
 312     user_ = get_object_or_404(User, id=id)
 313
 314     if not (request.user.is_superuser or request.user == user_):
 315         return HttpResponseUnauthorized(request)
 316
 317     auth_keys = user_.auth_keys.all()
 318
 319     if request.user.is_superuser or (not user_.has_usable_password()):
 320         FormClass = SetPasswordForm
 321     else:
 322         FormClass = ChangePasswordForm
 323
 324     if request.POST:
 325         form = FormClass(request.POST, user=user_)
 326         if form.is_valid():
 327             is_new_pass = not user_.has_usable_password()
 328             user_.set_password(form.cleaned_data['password1'])
 329             user_.save()
 330
 331             if is_new_pass:
 332                 request.user.message_set.create(message=_("New password set"))
 333                 if not request.user.is_superuser:
 334                     form = ChangePasswordForm(user=user_)
 335             else:
 336                 request.user.message_set.create(message=_("Your password was changed"))
 337
 338             return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': user_.id}))
 339     else:
 340         form = FormClass(user=user_)
 341
 342     auth_keys_list = []
 343
 344     for k in auth_keys:
 345         provider = AUTH_PROVIDERS.get(k.provider, None)
 346
 347         if provider is not None:
 348             name =  "%s: %s" % (provider.context.human_name, provider.context.readable_key(k))
 349         else:
 350             from forum.authentication.base import ConsumerTemplateContext
 351             "unknown: %s" % ConsumerTemplateContext.readable_key(k)
 352
 353         auth_keys_list.append({
 354         'name': name,
 355         'id': k.id
 356         })
 357
 358     return render_to_response('auth/auth_settings.html', {
 359     'view_user': user_,
 360     "can_view_private": (user_ == request.user) or request.user.is_superuser,
 361     'form': form,
 362     'has_password': user_.has_usable_password(),
 363     'auth_keys': auth_keys_list,
 364     'allow_local_auth': AUTH_PROVIDERS.get('local', None),
 365     }, context_instance=RequestContext(request))
 366
 367 def remove_external_provider(request, id):
 368     association = get_object_or_404(AuthKeyUserAssociation, id=id)
 369     if not (request.user.is_superuser or request.user == association.user):
 370         return HttpResponseUnauthorized(request)
 371
 372     request.user.message_set.create(message=_("You removed the association with %s") % association.provider)
 373     association.delete()
 374     return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': association.user.id}))
 375
 376 def login_and_forward(request, user, forward=None, message=None):
 377     if user.is_suspended():
 378         return forward_suspended_user(request, user)
 379
 380     user.backend = "django.contrib.auth.backends.ModelBackend"
 381     login(request, user)
 382
 383     # Store the login action
 384     UserLoginAction(user=user, ip=request.META['REMOTE_ADDR']).save()
 385
 386     if message is None:
 387         message = _("Welcome back %s, you are now logged in") % smart_unicode(user.username)
 388
 389     request.user.message_set.create(message=message)
 390
 391     if not forward:
 392         forward = request.session.get(ON_SIGNIN_SESSION_ATTR, reverse('index'))
 393
 394     pending_data = request.session.get(PENDING_SUBMISSION_SESSION_ATTR, None)
 395
 396     if pending_data and (user.email_isvalid or pending_data['type'] not in settings.REQUIRE_EMAIL_VALIDATION_TO):
 397         submission_time = pending_data['time']
 398         if submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.HOLD_PENDING_POSTS_MINUTES)):
 399             del request.session[PENDING_SUBMISSION_SESSION_ATTR]
 400         elif submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.WARN_PENDING_POSTS_MINUTES)):
 401             user.message_set.create(message=(_("You have a %s pending submission.") % pending_data['data_name']) + " %s, %s, %s" % (
 402                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('save')}), _("save it")),
 403                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('review')}), _("review")),
 404                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('cancel')}), _("cancel"))
 405             ))
 406         else:
 407             return manage_pending_data(request, _('save'), forward)
 408
 409     additional_get_params = urllib.urlencode(request.GET)
 410     return HttpResponseRedirect(forward + "?%s" % additional_get_params)
 411
 412 def forward_suspended_user(request, user, show_private_msg=True):
 413     message = _("Sorry, but this account is suspended")
 414     if show_private_msg:
 415         msg_type = 'privatemsg'
 416     else:
 417         msg_type = 'publicmsg'
 418
 419     suspension = user.suspension
 420     if suspension:
 421         message += (":<br />" + suspension.extra.get(msg_type, ''))
 422
 423     request.user.message_set.create(message)
 424     return HttpResponseRedirect(reverse('index'))
 425
 426 @decorate.withfn(login_required)
 427 def signout(request):
 428     logout(request)
 429     return HttpResponseRedirect(reverse('index'))