forum/views/auth.py

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