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# Copyright (c) 2011, 2012 Free Software Foundation
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This project incorporates work covered by the following copyright and permission notice:
# Copyright (c) 2009, Julien Fache
# All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# * Neither the name of the author nor the names of other
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
# OF THE POSSIBILITY OF SUCH DAMAGE.
# Copyright (c) 2011, 2012 Free Software Foundation
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Decorators for objectapp.views"""
from functools import wraps
from django.template import RequestContext
from django.contrib.auth.views import login
from django.shortcuts import redirect
from django.shortcuts import get_object_or_404
from django.shortcuts import render_to_response
from django.template.loader import get_template
from django.template import TemplateDoesNotExist
from django.views.decorators.csrf import csrf_protect
from django.views.decorators.cache import never_cache
def update_queryset(view, queryset,
queryset_parameter='queryset'):
"""Decorator around views based on a queryset
passed in parameter, who will force the update
of the queryset before executing the view.
Related to issue http://code.djangoproject.com/ticket/8378"""
@wraps(view)
def wrapper(*args, **kwargs):
"""Regenerate the queryset before passing it to the view."""
kwargs[queryset_parameter] = queryset()
return view(*args, **kwargs)
return wrapper
@csrf_protect
@never_cache
def password(request, gbobject):
"""Displays the password form and handle validation
by setting the valid password in a cookie."""
error = False
if request.method == 'POST':
if request.POST.get('password') == gbobject.password:
request.session[
'objectapp_gbobject_%s_password' % gbobject.pk] = gbobject.password
return redirect(gbobject)
error = True
return render_to_response('objectapp/password.html', {'error': error},
context_instance=RequestContext(request))
def protect_gbobject(view):
"""Decorator performing a security check if needed
around the generic.date_based.gbobject_detail view
and specify the template used to render the gbobject"""
@wraps(view)
def wrapper(*ka, **kw):
"""Do security check and retrieve the template"""
request = ka[0]
gbobject = get_object_or_404(kw['queryset'], slug=kw['slug'],
creation_date__year=kw['year'],
creation_date__month=kw['month'],
creation_date__day=kw['day'])
if gbobject.login_required and not request.user.is_authenticated():
return login(request, 'objectapp/login.html')
if gbobject.password and gbobject.password != \
request.session.get('objectapp_gbobject_%s_password' % gbobject.pk):
return password(request, gbobject)
kw['template_name'] = gbobject.template
return view(*ka, **kw)
return wrapper
def template_name_for_gbobject_queryset_filtered(model_type, model_name):
"""Return a custom template name for views
returning a queryset of Gbobject filtered by another model."""
template_name_list = (
'objectapp/%s/%s/gbobject_list.html' % (model_type, model_name),
'objectapp/%s/%s_gbobject_list.html' % (model_type, model_name),
'objectapp/%s/gbobject_list.html' % model_type,
'objectapp/gbobject_list.html')
for template_name in template_name_list:
try:
get_template(template_name)
return template_name
except TemplateDoesNotExist:
continue
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