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 writers import manage_pending_data
  18
  19 from forum.actions import EmailValidationAction
  20 from forum.utils import html
  21 from forum.views.decorators import login_required
  22 from forum.modules import decorate
  23 from forum.forms import SimpleRegistrationForm, TemporaryLoginRequestForm, ChangePasswordForm, SetPasswordForm
  24 from forum.http_responses import HttpResponseUnauthorized
  25 from forum.utils.mail import send_template_email
  26 from forum.authentication.base import InvalidAuthentication
  27 from forum.authentication import AUTH_PROVIDERS
  28 from forum.models import User, AuthKeyUserAssociation, ValidationHash
  29 from forum.actions import UserJoinsAction, UserLoginAction
  30 from forum import settings
  31
  32 from vars import ON_SIGNIN_SESSION_ATTR, PENDING_SUBMISSION_SESSION_ATTR
  33
  34 def signin_page(request):
  35     referer = request.META.get('HTTP_REFERER', '/')
  36
  37     # If the referer is equal to the sign up page, e. g. if the previous login attempt was not successful we do not
  38     # change the sign in URL. The user should go to the same page.
  39     if not referer.replace(settings.APP_URL, '') == reverse('auth_signin'):
  40         request.session[ON_SIGNIN_SESSION_ATTR] = referer
  41
  42     all_providers = [provider.context for provider in AUTH_PROVIDERS.values() if provider.context]
  43
  44     sort = lambda c1, c2: c1.weight - c2.weight
  45     can_show = lambda c: not request.user.is_authenticated() or c.show_to_logged_in_user
  46
  47     bigicon_providers = sorted([
  48     context for context in all_providers if context.mode == 'BIGICON' and can_show(context)
  49     ], sort)
  50
  51     smallicon_providers = sorted([
  52     context for context in all_providers if context.mode == 'SMALLICON' and can_show(context)
  53     ], sort)
  54
  55     top_stackitem_providers = sorted([
  56     context for context in all_providers if context.mode == 'TOP_STACK_ITEM' and can_show(context)
  57     ], sort)
  58
  59     stackitem_providers = sorted([
  60     context for context in all_providers if context.mode == 'STACK_ITEM' and can_show(context)
  61     ], sort)
  62
  63     try:
  64         msg = request.session['auth_error']
  65         del request.session['auth_error']
  66     except:
  67         msg = None
  68
  69     return render_to_response(
  70             'auth/signin.html',
  71             {
  72             'msg': msg,
  73             'all_providers': all_providers,
  74             'bigicon_providers': bigicon_providers,
  75             'top_stackitem_providers': top_stackitem_providers,
  76             'stackitem_providers': stackitem_providers,
  77             'smallicon_providers': smallicon_providers,
  78             },
  79             RequestContext(request))
  80
  81 def prepare_provider_signin(request, provider):
  82     force_email_request = request.REQUEST.get('validate_email', 'yes') == 'yes'
  83     request.session['force_email_request'] = force_email_request
  84
  85     if provider in AUTH_PROVIDERS:
  86         provider_class = AUTH_PROVIDERS[provider].consumer
  87
  88         try:
  89             request_url = provider_class.prepare_authentication_request(request,
  90                                                                         reverse('auth_provider_done',
  91                                                                                 kwargs={'provider': provider}))
  92
  93             return HttpResponseRedirect(request_url)
  94         except NotImplementedError, e:
  95             return process_provider_signin(request, provider)
  96         except InvalidAuthentication, e:
  97             request.session['auth_error'] = e.message
  98
  99         return HttpResponseRedirect(reverse('auth_signin'))
 100     else:
 101         raise Http404()
 102
 103
 104 def process_provider_signin(request, provider):
 105     if provider in AUTH_PROVIDERS:
 106         provider_class = AUTH_PROVIDERS[provider].consumer
 107
 108         try:
 109             assoc_key = provider_class.process_authentication_request(request)
 110         except InvalidAuthentication, e:
 111             request.session['auth_error'] = e.message
 112             return HttpResponseRedirect(reverse('auth_signin'))
 113
 114         if request.user.is_authenticated():
 115             if isinstance(assoc_key, (type, User)):
 116                 if request.user != assoc_key:
 117                     request.session['auth_error'] = _(
 118                             "Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again."
 119                             )
 120                 else:
 121                     request.session['auth_error'] = _("You are already logged in with that user.")
 122             else:
 123                 try:
 124                     assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 125                     if assoc.user == request.user:
 126                         request.session['auth_error'] = _(
 127                                 "These login credentials are already associated with your account.")
 128                     else:
 129                         request.session['auth_error'] = _(
 130                                 "Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again."
 131                                 )
 132                 except:
 133                     uassoc = AuthKeyUserAssociation(user=request.user, key=assoc_key, provider=provider)
 134                     uassoc.save()
 135                     request.user.message_set.create(
 136                             message=_('The new credentials are now associated with your account'))
 137                     return HttpResponseRedirect(reverse('user_authsettings', args=[request.user.id]))
 138
 139             return HttpResponseRedirect(reverse('auth_signin'))
 140         else:
 141             if isinstance(assoc_key, User):
 142                 return login_and_forward(request, assoc_key)
 143
 144         try:
 145             assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
 146             user_ = assoc.user
 147             return login_and_forward(request, user_)
 148         except AuthKeyUserAssociation.DoesNotExist:
 149             request.session['assoc_key'] = assoc_key
 150             request.session['auth_provider'] = provider
 151             return HttpResponseRedirect(reverse('auth_external_register'))
 152
 153     return HttpResponseRedirect(reverse('auth_signin'))
 154
 155 def external_register(request):
 156     if request.method == 'POST' and 'bnewaccount' in request.POST:
 157         form1 = SimpleRegistrationForm(request.POST)
 158
 159         if form1.is_valid():
 160             user_ = User(username=form1.cleaned_data['username'], email=form1.cleaned_data['email'], real_name=form1.cleaned_data['real_name'])
 161             user_.email_isvalid = request.session.get('auth_validated_email', '') == form1.cleaned_data['email']
 162             user_.set_unusable_password()
 163
 164             if User.objects.all().count() == 0:
 165                 user_.is_superuser = True
 166                 user_.is_staff = True
 167
 168             user_.save()
 169             UserJoinsAction(user=user_, ip=request.META['REMOTE_ADDR']).save()
 170
 171             try:
 172                 assoc_key = request.session['assoc_key']
 173                 auth_provider = request.session['auth_provider']
 174             except:
 175                 request.session['auth_error'] = _(
 176                         "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."
 177                         )
 178                 logging.error("Missing session data when trying to complete user registration: %s" % ", ".join(
 179                         ["%s: %s" % (k, v) for k, v in request.META.items()]))
 180                 return HttpResponseRedirect(reverse('auth_signin'))
 181
 182             uassoc = AuthKeyUserAssociation(user=user_, key=assoc_key, provider=auth_provider)
 183             uassoc.save()
 184
 185             del request.session['assoc_key']
 186             del request.session['auth_provider']
 187
 188             return login_and_forward(request, user_, message=_("A welcome email has been sent to your email address. "))
 189     else:
 190         auth_provider = request.session.get('auth_provider', None)
 191         if not auth_provider:
 192             request.session['auth_error'] = _(
 193                     "Oops, something went wrong in the middle of this process. Please try again.")
 194             logging.error("Missing session data when trying to complete user registration: %s" % ", ".join(
 195                     ["%s: %s" % (k, v) for k, v in request.META.items()]))
 196             return HttpResponseRedirect(reverse('auth_signin'))
 197
 198         provider_class = AUTH_PROVIDERS[auth_provider].consumer
 199
 200         if provider_class.__class__.__name__ == 'FacebookAuthConsumer':
 201             user_data = provider_class.get_user_data(request.session['access_token'])
 202         else:
 203             user_data = provider_class.get_user_data(request.session['assoc_key'])
 204
 205
 206         if not user_data:
 207             user_data = request.session.get('auth_consumer_data', {})
 208
 209         username = user_data.get('username', '')
 210         email = user_data.get('email', '')
 211         real_name = user_data.get('real_name', '')
 212
 213         if email:
 214             request.session['auth_validated_email'] = email
 215
 216         form1 = SimpleRegistrationForm(initial={
 217         'next': '/',
 218         'username': username,
 219         'email': email,
 220         'real_name': real_name,
 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         additional_get_params = urllib.urlencode(dict([k, v.encode('utf-8')] for k, v in request.GET.items()))
 295         send_template_email([request.user], "auth/mail_validation.html", {
 296             'validation_code': hash,
 297             'additional_get_params' : additional_get_params
 298         })
 299
 300         request.user.message_set.create(message=_("A message with an email validation link was just sent to your address."))
 301         return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))
 302
 303
 304
 305 def validate_email(request, user, code):
 306     user = get_object_or_404(User, id=user)
 307
 308     if (ValidationHash.objects.validate(code, user, 'email', [user.email])):
 309         EmailValidationAction(user=user, ip=request.META['REMOTE_ADDR']).save()
 310         return login_and_forward(request, user, reverse('index'), _("Thank you, your email is now validated."))
 311     else:
 312         return render_to_response('auth/mail_already_validated.html', { 'user' : user }, RequestContext(request))
 313
 314 def auth_settings(request, id):
 315     user_ = get_object_or_404(User, id=id)
 316
 317     if not (request.user.is_superuser or request.user == user_):
 318         return HttpResponseUnauthorized(request)
 319
 320     auth_keys = user_.auth_keys.all()
 321
 322     if request.user.is_superuser or (not user_.has_usable_password()):
 323         FormClass = SetPasswordForm
 324     else:
 325         FormClass = ChangePasswordForm
 326
 327     if request.POST:
 328         form = FormClass(request.POST, user=user_)
 329         if form.is_valid():
 330             is_new_pass = not user_.has_usable_password()
 331             user_.set_password(form.cleaned_data['password1'])
 332             user_.save()
 333
 334             if is_new_pass:
 335                 request.user.message_set.create(message=_("New password set"))
 336                 if not request.user.is_superuser:
 337                     form = ChangePasswordForm(user=user_)
 338             else:
 339                 request.user.message_set.create(message=_("Your password was changed"))
 340
 341             return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': user_.id}))
 342     else:
 343         form = FormClass(user=user_)
 344
 345     auth_keys_list = []
 346
 347     for k in auth_keys:
 348         provider = AUTH_PROVIDERS.get(k.provider, None)
 349
 350         if provider is not None:
 351             name =  "%s: %s" % (provider.context.human_name, provider.context.readable_key(k))
 352         else:
 353             from forum.authentication.base import ConsumerTemplateContext
 354             "unknown: %s" % ConsumerTemplateContext.readable_key(k)
 355
 356         auth_keys_list.append({
 357         'name': name,
 358         'id': k.id
 359         })
 360
 361     return render_to_response('auth/auth_settings.html', {
 362     'view_user': user_,
 363     "can_view_private": (user_ == request.user) or request.user.is_superuser,
 364     'form': form,
 365     'has_password': user_.has_usable_password(),
 366     'auth_keys': auth_keys_list,
 367     'allow_local_auth': AUTH_PROVIDERS.get('local', None),
 368     }, context_instance=RequestContext(request))
 369
 370 def remove_external_provider(request, id):
 371     association = get_object_or_404(AuthKeyUserAssociation, id=id)
 372     if not (request.user.is_superuser or request.user == association.user):
 373         return HttpResponseUnauthorized(request)
 374
 375     request.user.message_set.create(message=_("You removed the association with %s") % association.provider)
 376     association.delete()
 377     return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': association.user.id}))
 378
 379 def login_and_forward(request, user, forward=None, message=None):
 380     if user.is_suspended():
 381         return forward_suspended_user(request, user)
 382
 383     user.backend = "django.contrib.auth.backends.ModelBackend"
 384     login(request, user)
 385
 386     # Store the login action
 387     UserLoginAction(user=user, ip=request.META['REMOTE_ADDR']).save()
 388
 389     if message is None:
 390         message = _("Welcome back %s, you are now logged in") % smart_unicode(user.username)
 391
 392     request.user.message_set.create(message=message)
 393
 394     if not forward:
 395         forward = request.session.get(ON_SIGNIN_SESSION_ATTR, reverse('index'))
 396
 397     pending_data = request.session.get(PENDING_SUBMISSION_SESSION_ATTR, None)
 398
 399     if pending_data and (user.email_isvalid or pending_data['type'] not in settings.REQUIRE_EMAIL_VALIDATION_TO):
 400         submission_time = pending_data['time']
 401         if submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.HOLD_PENDING_POSTS_MINUTES)):
 402             del request.session[PENDING_SUBMISSION_SESSION_ATTR]
 403         elif submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.WARN_PENDING_POSTS_MINUTES)):
 404             user.message_set.create(message=(_("You have a %s pending submission.") % pending_data['data_name']) + " %s, %s, %s" % (
 405                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('save')}), _("save it")),
 406                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('review')}), _("review")),
 407                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('cancel')}), _("cancel"))
 408             ))
 409         else:
 410             return manage_pending_data(request, _('save'), forward)
 411
 412     additional_get_params = urllib.urlencode(dict([k, v.encode('utf-8')] for k, v in request.GET.items()))
 413
 414     parsed_forward = urlparse(forward)
 415
 416     # If there is already some parsed query in the URL then change the forward URL
 417     if parsed_forward.query:
 418         forward_url = forward + "&%s" % additional_get_params
 419     else:
 420         forward_url = forward + "?%s" % additional_get_params
 421
 422     return HttpResponseRedirect(forward_url)
 423
 424 def forward_suspended_user(request, user, show_private_msg=True):
 425     message = _("Sorry, but this account is suspended")
 426     if show_private_msg:
 427         msg_type = 'privatemsg'
 428     else:
 429         msg_type = 'publicmsg'
 430
 431     suspension = user.suspension
 432     if suspension:
 433         message += (":<br />" + suspension.extra.get(msg_type, ''))
 434
 435     request.user.message_set.create(message)
 436     return HttpResponseRedirect(reverse('index'))
 437
 438 @decorate.withfn(login_required)
 439 def signout(request):
 440     logout(request)
 441     return HttpResponseRedirect(reverse('index'))