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# Copyright 2011-2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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from django.http import HttpResponseBadRequest
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from django.utils.translation import ugettext as _
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from django.contrib import messages
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from django.template import RequestContext
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from django.views.decorators.http import require_http_methods
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from django.http import HttpResponseRedirect
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from django.core.urlresolvers import reverse
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from django.core.exceptions import ImproperlyConfigured
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from django.shortcuts import get_object_or_404
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from urlparse import urlunsplit, urlsplit
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from astakos.im.util import prepare_response, get_context
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from astakos.im.views import requires_anonymous, render_response, \
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requires_auth_provider
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from astakos.im.settings import ENABLE_LOCAL_ACCOUNT_MIGRATION, BASEURL
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from astakos.im.models import AstakosUser, PendingThirdPartyUser
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from astakos.im.forms import LoginForm
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from astakos.im.activation_backends import get_backend, SimpleBackend
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from astakos.im import settings
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import astakos.im.messages as astakos_messages
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import logging
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logger = logging.getLogger(__name__)
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import oauth2 as oauth
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import cgi
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consumer = oauth.Consumer(settings.TWITTER_TOKEN, settings.TWITTER_SECRET)
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client = oauth.Client(consumer)
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request_token_url = 'http://twitter.com/oauth/request_token'
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access_token_url = 'http://twitter.com/oauth/access_token'
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authenticate_url = 'http://twitter.com/oauth/authenticate'
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@requires_auth_provider('twitter', login=True)
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@require_http_methods(["GET", "POST"])
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def login(request):
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resp, content = client.request(request_token_url, "GET")
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if resp['status'] != '200':
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messages.error(request, 'Invalid Twitter response')
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return HttpResponseRedirect(reverse('edit_profile'))
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request.session['request_token'] = dict(cgi.parse_qsl(content))
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url = "%s?oauth_token=%s" % (authenticate_url,
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request.session['request_token']['oauth_token'])
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return HttpResponseRedirect(url)
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@requires_auth_provider('twitter', login=True)
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@require_http_methods(["GET", "POST"])
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def authenticated(
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request,
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template='im/third_party_check_local.html',
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extra_context={}
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):
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if not 'request_token' in request.session:
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messages.error(request, 'Twitter handshake failed')
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return HttpResponseRedirect(reverse('edit_profile'))
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token = oauth.Token(request.session['request_token']['oauth_token'],
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request.session['request_token']['oauth_token_secret'])
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client = oauth.Client(consumer, token)
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# Step 2. Request the authorized access token from Twitter.
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resp, content = client.request(access_token_url, "GET")
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if resp['status'] != '200':
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try:
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del request.session['request_token']
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except:
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pass
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messages.error(request, 'Invalid Twitter response')
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return HttpResponseRedirect(reverse('edit_profile'))
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access_token = dict(cgi.parse_qsl(content))
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userid = access_token['user_id']
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# an existing user accessed the view
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if request.user.is_authenticated():
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if request.user.has_auth_provider('twitter', identifier=userid):
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return HttpResponseRedirect(reverse('edit_profile'))
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# automatically add eppn provider to user
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user = request.user
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if not request.user.can_add_auth_provider('twitter',
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identifier=userid):
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messages.error(request, 'Account already exists.')
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return HttpResponseRedirect(reverse('edit_profile'))
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user.add_auth_provider('twitter', identifier=userid)
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return HttpResponseRedirect(reverse('edit_profile'))
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try:
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# astakos user exists ?
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user = AstakosUser.objects.get_auth_provider_user(
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'twitter',
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identifier=userid
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)
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if user.is_active:
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# authenticate user
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return prepare_response(request,
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user,
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request.GET.get('next'),
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'renew' in request.GET)
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elif not user.activation_sent:
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message = _('Your request is pending activation')
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#TODO: use astakos_messages
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if not settings.MODERATION_ENABLED:
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url = user.get_resend_activation_url()
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msg_extra = _('<a href="%s">Resend activation email?</a>') % url
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message = message + u' ' + msg_extra
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messages.error(request, message)
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return HttpResponseRedirect(reverse('login'))
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else:
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#TODO: use astakos_messages
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message = _(u'Account disabled. Please contact support')
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messages.error(request, message)
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return HttpResponseRedirect(reverse('login'))
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except AstakosUser.DoesNotExist, e:
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#TODO: use astakos_messages
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# eppn not stored in astakos models, create pending profile
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user, created = PendingThirdPartyUser.objects.get_or_create(
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third_party_identifier=userid,
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provider='twitter',
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)
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# update pending user
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user.affiliation = 'Twitter'
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user.generate_token()
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user.save()
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extra_context['provider'] = 'twitter'
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extra_context['token'] = user.token
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return render_response(
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template,
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context_instance=get_context(request, extra_context)
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)
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@requires_auth_provider('twitter', login=True, create=True)
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@require_http_methods(["GET"])
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@requires_anonymous
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def signup(
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request,
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token,
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backend=None,
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on_creation_template='im/third_party_registration.html',
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extra_context={}):
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extra_context = extra_context or {}
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if not token:
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#TODO: use astakos_messages
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return HttpResponseBadRequest(_('Missing key parameter.'))
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pending = get_object_or_404(PendingThirdPartyUser, token=token)
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d = pending.__dict__
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d.pop('_state', None)
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d.pop('id', None)
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d.pop('token', None)
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d.pop('created', None)
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user = AstakosUser(**d)
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try:
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backend = backend or get_backend(request)
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except ImproperlyConfigured, e:
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messages.error(request, e)
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else:
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extra_context['form'] = backend.get_signup_form(
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provider='twitter',
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instance=user
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)
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extra_context['provider'] = 'twitter'
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extra_context['third_party_token'] = token
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return render_response(
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on_creation_template,
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context_instance=get_context(request, extra_context)
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)
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