forum/views/auth.py

   1 # -*- coding: utf-8 -*-
   2
   3 import datetime
   4 import logging
   5 import urllib
   6 from urlparse import urlparse
   7
   8 from django.shortcuts import render_to_response, get_object_or_404
   9 from django.template import RequestContext
  10 from django.core.urlresolvers import reverse
  11 from django.http import HttpResponseRedirect, Http404
  12 from django.utils.safestring import mark_safe
  13 from django.utils.translation import ugettext as _
  14 from django.utils.encoding import smart_unicode
  15 from django.contrib.auth import login, logout
  16
  17 from django.contrib import messages
  18
  19 from writers import manage_pending_data
  20
  21 from forum.actions import EmailValidationAction
  22 from forum.utils import html
  23 from forum.views.decorators import login_required
  24 from forum.modules import decorate
  25 from forum.forms import SimpleRegistrationForm, TemporaryLoginRequestForm, ChangePasswordForm, SetPasswordForm
  26 from forum.http_responses import HttpResponseUnauthorized
  27 from forum.utils.mail import send_template_email
  28 from forum.authentication.base import InvalidAuthentication
  29 from forum.authentication import AUTH_PROVIDERS
  30 from forum.models import User, AuthKeyUserAssociation, ValidationHash
  31 from forum.actions import UserJoinsAction, UserLoginAction
  32 from forum import settings
  33
  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                     messages.info(request, _('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'], real_name=form1.cleaned_data['real_name'])
 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
 201         if provider_class.__class__.__name__ == 'FacebookAuthConsumer':
 202             user_data = provider_class.get_user_data(request.session['access_token'])
 203         else:
 204             user_data = provider_class.get_user_data(request.session['assoc_key'])
 205
 206
 207         if not user_data:
 208             user_data = request.session.get('auth_consumer_data', {})
 209
 210         username = user_data.get('username', '')
 211         email = user_data.get('email', '')
 212         real_name = user_data.get('real_name', '')
 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         'real_name': real_name,
 222         })
 223
 224     provider_context = AUTH_PROVIDERS[request.session['auth_provider']].context
 225
 226     return render_to_response('auth/complete.html', {
 227     'form1': form1,
 228     'provider':provider_context and mark_safe(provider_context.human_name) or _('unknown'),
 229     'login_type':provider_context.id,
 230     'gravatar_faq_url':reverse('faq') + '#gravatar',
 231     }, context_instance=RequestContext(request))
 232
 233 def request_temp_login(request):
 234     if request.method == 'POST':
 235         form = TemporaryLoginRequestForm(request.POST)
 236
 237         if form.is_valid():
 238             users = form.user_cache
 239
 240             for u in users:
 241                 if u.is_suspended():
 242                     return forward_suspended_user(request, u, False)
 243
 244             for u in users:
 245                 try:
 246                     hash = get_object_or_404(ValidationHash, user=u, type='templogin')
 247                     if hash.expiration < datetime.datetime.now():
 248                         hash.delete()
 249                         return request_temp_login(request)
 250                 except:
 251                     hash = ValidationHash.objects.create_new(u, 'templogin', [u.id])
 252
 253                 send_template_email([u], "auth/temp_login_email.html", {'temp_login_code': hash})
 254
 255                 messages.info(request, _("An email has been sent with your temporary login key"))
 256
 257             return HttpResponseRedirect(reverse('index'))
 258     else:
 259         form = TemporaryLoginRequestForm()
 260
 261     return render_to_response(
 262             'auth/temp_login_request.html', {'form': form},
 263             context_instance=RequestContext(request))
 264
 265 def temp_signin(request, user, code):
 266     user = get_object_or_404(User, id=user)
 267
 268     if (ValidationHash.objects.validate(code, user, 'templogin', [user.id])):
 269
 270         # If the user requests temp_signin he must have forgotten his password. So we mark it as unusable.
 271         user.set_unusable_password()
 272         user.save()
 273
 274         return login_and_forward(request, user, reverse('user_authsettings', kwargs={'id': user.id}),
 275                                  _(
 276                                          "You are logged in with a temporary access key, please take the time to fix your issue with authentication."
 277                                          ))
 278     else:
 279         raise Http404()
 280
 281 def send_validation_email(request):
 282     if not request.user.is_authenticated():
 283         return HttpResponseUnauthorized(request)
 284     else:
 285         # We check if there are some old validation hashes. If there are -- we delete them.
 286         try:
 287             hash = ValidationHash.objects.get(user=request.user, type='email')
 288             hash.delete()
 289         except:
 290             pass
 291
 292         # We don't care if there are previous cashes in the database... In every case we have to create a new one
 293         hash = ValidationHash.objects.create_new(request.user, 'email', [request.user.email])
 294
 295         additional_get_params = urllib.urlencode(dict([k, v.encode('utf-8')] for k, v in request.GET.items()))
 296         send_template_email([request.user], "auth/mail_validation.html", {
 297             'validation_code': hash,
 298             'additional_get_params' : additional_get_params
 299         })
 300
 301         messages.info(request, _("A message with an email validation link was just sent to your address."))
 302         return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))
 303
 304
 305
 306 def validate_email(request, user, code):
 307     user = get_object_or_404(User, id=user)
 308
 309     if (ValidationHash.objects.validate(code, user, 'email', [user.email])):
 310         EmailValidationAction(user=user, ip=request.META['REMOTE_ADDR']).save()
 311         return login_and_forward(request, user, reverse('index'), _("Thank you, your email is now validated."))
 312     else:
 313         return render_to_response('auth/mail_already_validated.html', { 'user' : user }, RequestContext(request))
 314
 315 def auth_settings(request, id):
 316     user_ = get_object_or_404(User, id=id)
 317
 318     if not (request.user.is_superuser or request.user == user_):
 319         return HttpResponseUnauthorized(request)
 320
 321     auth_keys = user_.auth_keys.all()
 322
 323     if request.user.is_superuser or (not user_.has_usable_password()):
 324         FormClass = SetPasswordForm
 325     else:
 326         FormClass = ChangePasswordForm
 327
 328     if request.POST:
 329         form = FormClass(request.POST, user=user_)
 330         if form.is_valid():
 331             is_new_pass = not user_.has_usable_password()
 332             user_.set_password(form.cleaned_data['password1'])
 333             user_.save()
 334
 335             if is_new_pass:
 336                 messages.info(request, _("New password set"))
 337                 if not request.user.is_superuser:
 338                     form = ChangePasswordForm(user=user_)
 339             else:
 340                 messages.info(request, _("Your password was changed"))
 341
 342             return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': user_.id}))
 343     else:
 344         form = FormClass(user=user_)
 345
 346     auth_keys_list = []
 347
 348     for k in auth_keys:
 349         provider = AUTH_PROVIDERS.get(k.provider, None)
 350
 351         if provider is not None:
 352             name =  "%s: %s" % (provider.context.human_name, provider.context.readable_key(k))
 353         else:
 354             from forum.authentication.base import ConsumerTemplateContext
 355             "unknown: %s" % ConsumerTemplateContext.readable_key(k)
 356
 357         auth_keys_list.append({
 358         'name': name,
 359         'id': k.id
 360         })
 361
 362     return render_to_response('auth/auth_settings.html', {
 363     'view_user': user_,
 364     "can_view_private": (user_ == request.user) or request.user.is_superuser,
 365     'form': form,
 366     'has_password': user_.has_usable_password(),
 367     'auth_keys': auth_keys_list,
 368     'allow_local_auth': AUTH_PROVIDERS.get('local', None),
 369     }, context_instance=RequestContext(request))
 370
 371 def remove_external_provider(request, id):
 372     association = get_object_or_404(AuthKeyUserAssociation, id=id)
 373     if not (request.user.is_superuser or request.user == association.user):
 374         return HttpResponseUnauthorized(request)
 375
 376     messages.info(request, _("You removed the association with %s") % association.provider)
 377     association.delete()
 378     return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': association.user.id}))
 379
 380 def login_and_forward(request, user, forward=None, message=None):
 381     if user.is_suspended():
 382         return forward_suspended_user(request, user)
 383
 384     user.backend = "django.contrib.auth.backends.ModelBackend"
 385     login(request, user)
 386
 387     # Store the login action
 388     UserLoginAction(user=user, ip=request.META['REMOTE_ADDR']).save()
 389
 390     if message is None:
 391         message = _("Welcome back %s, you are now logged in") % smart_unicode(user.username)
 392
 393     messages.info(request, message)
 394
 395     if not forward:
 396         forward = request.session.get(ON_SIGNIN_SESSION_ATTR, reverse('index'))
 397
 398     pending_data = request.session.get(PENDING_SUBMISSION_SESSION_ATTR, None)
 399
 400     if pending_data and (user.email_isvalid or pending_data['type'] not in settings.REQUIRE_EMAIL_VALIDATION_TO):
 401         submission_time = pending_data['time']
 402         if submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.HOLD_PENDING_POSTS_MINUTES)):
 403             del request.session[PENDING_SUBMISSION_SESSION_ATTR]
 404         elif submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.WARN_PENDING_POSTS_MINUTES)):
 405             messages.info(request, (_("You have a %s pending submission.") % pending_data['data_name']) + " %s, %s, %s" % (
 406                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('save')}), _("save it")),
 407                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('review')}), _("review")),
 408                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('cancel')}), _("cancel"))
 409             ))
 410         else:
 411             return manage_pending_data(request, _('save'), forward)
 412
 413     additional_get_params = urllib.urlencode(dict([k, v.encode('utf-8')] for k, v in request.GET.items()))
 414
 415     parsed_forward = urlparse(forward)
 416
 417     # If there is already some parsed query in the URL then change the forward URL
 418     if parsed_forward.query:
 419         forward_url = forward + "&%s" % additional_get_params
 420     else:
 421         forward_url = forward + "?%s" % additional_get_params
 422
 423     return HttpResponseRedirect(forward_url)
 424
 425 def forward_suspended_user(request, user, show_private_msg=True):
 426     message = _("Sorry, but this account is suspended")
 427     if show_private_msg:
 428         msg_type = 'privatemsg'
 429     else:
 430         msg_type = 'publicmsg'
 431
 432     suspension = user.suspension
 433     if suspension:
 434         message += (":<br />" + suspension.extra.get(msg_type, ''))
 435
 436     messages.info(request, message)
 437     return HttpResponseRedirect(reverse('index'))
 438
 439 @decorate.withfn(login_required)
 440 def signout(request):
 441     logout(request)
 442     return HttpResponseRedirect(reverse('index'))