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'])
 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
 212         if email:
 213             request.session['auth_validated_email'] = email
 214
 215         form1 = SimpleRegistrationForm(initial={
 216         'next': '/',
 217         'username': username,
 218         'email': email,
 219         })
 220
 221     provider_context = AUTH_PROVIDERS[request.session['auth_provider']].context
 222
 223     return render_to_response('auth/complete.html', {
 224     'form1': form1,
 225     'provider':provider_context and mark_safe(provider_context.human_name) or _('unknown'),
 226     'login_type':provider_context.id,
 227     'gravatar_faq_url':reverse('faq') + '#gravatar',
 228     }, context_instance=RequestContext(request))
 229
 230 def request_temp_login(request):
 231     if request.method == 'POST':
 232         form = TemporaryLoginRequestForm(request.POST)
 233
 234         if form.is_valid():
 235             users = form.user_cache
 236
 237             for u in users:
 238                 if u.is_suspended():
 239                     return forward_suspended_user(request, u, False)
 240
 241             for u in users:
 242                 try:
 243                     hash = get_object_or_404(ValidationHash, user=u, type='templogin')
 244                     if hash.expiration < datetime.datetime.now():
 245                         hash.delete()
 246                         return request_temp_login(request)
 247                 except:
 248                     hash = ValidationHash.objects.create_new(u, 'templogin', [u.id])
 249
 250                 send_template_email([u], "auth/temp_login_email.html", {'temp_login_code': hash})
 251
 252                 request.user.message_set.create(message=_("An email has been sent with your temporary login key"))
 253
 254             return HttpResponseRedirect(reverse('index'))
 255     else:
 256         form = TemporaryLoginRequestForm()
 257
 258     return render_to_response(
 259             'auth/temp_login_request.html', {'form': form},
 260             context_instance=RequestContext(request))
 261
 262 def temp_signin(request, user, code):
 263     user = get_object_or_404(User, id=user)
 264
 265     if (ValidationHash.objects.validate(code, user, 'templogin', [user.id])):
 266
 267         # If the user requests temp_signin he must have forgotten his password. So we mark it as unusable.
 268         user.set_unusable_password()
 269         user.save()
 270
 271         return login_and_forward(request, user, reverse('user_authsettings', kwargs={'id': user.id}),
 272                                  _(
 273                                          "You are logged in with a temporary access key, please take the time to fix your issue with authentication."
 274                                          ))
 275     else:
 276         raise Http404()
 277
 278 def send_validation_email(request):
 279     if not request.user.is_authenticated():
 280         return HttpResponseUnauthorized(request)
 281     else:
 282         # We check if there are some old validation hashes. If there are -- we delete them.
 283         try:
 284             hash = ValidationHash.objects.get(user=request.user, type='email')
 285             hash.delete()
 286         except:
 287             pass
 288
 289         # We don't care if there are previous cashes in the database... In every case we have to create a new one
 290         hash = ValidationHash.objects.create_new(request.user, 'email', [request.user.email])
 291
 292         additional_get_params = urllib.urlencode(request.GET)
 293         send_template_email([request.user], "auth/mail_validation.html", {
 294             'validation_code': hash,
 295             'additional_get_params' : additional_get_params
 296         })
 297
 298         request.user.message_set.create(message=_("A message with an email validation link was just sent to your address."))
 299         return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))
 300
 301
 302
 303 def validate_email(request, user, code):
 304     user = get_object_or_404(User, id=user)
 305
 306     if (ValidationHash.objects.validate(code, user, 'email', [user.email])):
 307         EmailValidationAction(user=user, ip=request.META['REMOTE_ADDR']).save()
 308         return login_and_forward(request, user, reverse('index'), _("Thank you, your email is now validated."))
 309     else:
 310         return render_to_response('auth/mail_already_validated.html', { 'user' : user }, RequestContext(request))
 311
 312 def auth_settings(request, id):
 313     user_ = get_object_or_404(User, id=id)
 314
 315     if not (request.user.is_superuser or request.user == user_):
 316         return HttpResponseUnauthorized(request)
 317
 318     auth_keys = user_.auth_keys.all()
 319
 320     if request.user.is_superuser or (not user_.has_usable_password()):
 321         FormClass = SetPasswordForm
 322     else:
 323         FormClass = ChangePasswordForm
 324
 325     if request.POST:
 326         form = FormClass(request.POST, user=user_)
 327         if form.is_valid():
 328             is_new_pass = not user_.has_usable_password()
 329             user_.set_password(form.cleaned_data['password1'])
 330             user_.save()
 331
 332             if is_new_pass:
 333                 request.user.message_set.create(message=_("New password set"))
 334                 if not request.user.is_superuser:
 335                     form = ChangePasswordForm(user=user_)
 336             else:
 337                 request.user.message_set.create(message=_("Your password was changed"))
 338
 339             return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': user_.id}))
 340     else:
 341         form = FormClass(user=user_)
 342
 343     auth_keys_list = []
 344
 345     for k in auth_keys:
 346         provider = AUTH_PROVIDERS.get(k.provider, None)
 347
 348         if provider is not None:
 349             name =  "%s: %s" % (provider.context.human_name, provider.context.readable_key(k))
 350         else:
 351             from forum.authentication.base import ConsumerTemplateContext
 352             "unknown: %s" % ConsumerTemplateContext.readable_key(k)
 353
 354         auth_keys_list.append({
 355         'name': name,
 356         'id': k.id
 357         })
 358
 359     return render_to_response('auth/auth_settings.html', {
 360     'view_user': user_,
 361     "can_view_private": (user_ == request.user) or request.user.is_superuser,
 362     'form': form,
 363     'has_password': user_.has_usable_password(),
 364     'auth_keys': auth_keys_list,
 365     'allow_local_auth': AUTH_PROVIDERS.get('local', None),
 366     }, context_instance=RequestContext(request))
 367
 368 def remove_external_provider(request, id):
 369     association = get_object_or_404(AuthKeyUserAssociation, id=id)
 370     if not (request.user.is_superuser or request.user == association.user):
 371         return HttpResponseUnauthorized(request)
 372
 373     request.user.message_set.create(message=_("You removed the association with %s") % association.provider)
 374     association.delete()
 375     return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': association.user.id}))
 376
 377 def login_and_forward(request, user, forward=None, message=None):
 378     if user.is_suspended():
 379         return forward_suspended_user(request, user)
 380
 381     user.backend = "django.contrib.auth.backends.ModelBackend"
 382     login(request, user)
 383
 384     # Store the login action
 385     UserLoginAction(user=user, ip=request.META['REMOTE_ADDR']).save()
 386
 387     if message is None:
 388         message = _("Welcome back %s, you are now logged in") % smart_unicode(user.username)
 389
 390     request.user.message_set.create(message=message)
 391
 392     if not forward:
 393         forward = request.session.get(ON_SIGNIN_SESSION_ATTR, reverse('index'))
 394
 395     pending_data = request.session.get(PENDING_SUBMISSION_SESSION_ATTR, None)
 396
 397     if pending_data and (user.email_isvalid or pending_data['type'] not in settings.REQUIRE_EMAIL_VALIDATION_TO):
 398         submission_time = pending_data['time']
 399         if submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.HOLD_PENDING_POSTS_MINUTES)):
 400             del request.session[PENDING_SUBMISSION_SESSION_ATTR]
 401         elif submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.WARN_PENDING_POSTS_MINUTES)):
 402             user.message_set.create(message=(_("You have a %s pending submission.") % pending_data['data_name']) + " %s, %s, %s" % (
 403                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('save')}), _("save it")),
 404                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('review')}), _("review")),
 405                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('cancel')}), _("cancel"))
 406             ))
 407         else:
 408             return manage_pending_data(request, _('save'), forward)
 409
 410     additional_get_params = urllib.urlencode(request.GET)
 411
 412     parsed_forward = urlparse(forward)
 413
 414     # If there is already some parsed query in the URL then change the forward URL
 415     if parsed_forward.query:
 416         forward_url = forward + "&%s" % additional_get_params
 417     else:
 418         forward_url = forward + "?%s" % additional_get_params
 419
 420     return HttpResponseRedirect(forward_url)
 421
 422 def forward_suspended_user(request, user, show_private_msg=True):
 423     message = _("Sorry, but this account is suspended")
 424     if show_private_msg:
 425         msg_type = 'privatemsg'
 426     else:
 427         msg_type = 'publicmsg'
 428
 429     suspension = user.suspension
 430     if suspension:
 431         message += (":<br />" + suspension.extra.get(msg_type, ''))
 432
 433     request.user.message_set.create(message)
 434     return HttpResponseRedirect(reverse('index'))
 435
 436 @decorate.withfn(login_required)
 437 def signout(request):
 438     logout(request)
 439     return HttpResponseRedirect(reverse('index'))