X-Git-Url: https://git.mdrn.pl/django-cas-provider.git/blobdiff_plain/f8e6be4d76cbccbce1a20f04b4065b75970af3e3..413bf45b20e253acdf45c0e43d4f05b1ecf33c0d:/cas_provider/views.py diff --git a/cas_provider/views.py b/cas_provider/views.py index 3572303..ccf84a2 100644 --- a/cas_provider/views.py +++ b/cas_provider/views.py @@ -1,31 +1,51 @@ +from __future__ import unicode_literals + import logging logger = logging.getLogger('cas_provider.views') -import urllib -import logging -from urllib import urlencode -import urllib2 -import urlparse +try: + from urllib.error import HTTPError, URLError + from urllib.parse import parse_qsl, urlencode, urlparse, urlsplit, urlunsplit + from urllib.request import urlopen +except ImportError: + from urllib import urlencode + from urllib2 import HTTPError, URLError, urlopen + from urlparse import parse_qsl, urlparse, urlsplit, urlunsplit +from functools import wraps + +from django import VERSION +from django.utils.decorators import available_attrs +from django.views.decorators.debug import sensitive_post_parameters +from django.views.decorators.cache import cache_control +from django.utils.cache import patch_cache_control +from django.views.decorators.csrf import csrf_protect from django.http import HttpResponse, HttpResponseRedirect from django.conf import settings from django.contrib.auth import login as auth_login, logout as auth_logout -from django.core.urlresolvers import get_callable -from django.shortcuts import render_to_response + +from django.shortcuts import render +from django.utils.translation import ugettext as _ from django.template import RequestContext from django.contrib.auth import authenticate -from django.core.urlresolvers import reverse +from django.utils.translation import ugettext as _ from lxml import etree from cas_provider.attribute_formatters import NSMAP, CAS from cas_provider.models import ProxyGrantingTicket, ProxyTicket from cas_provider.models import ServiceTicket -from cas_provider.exceptions import SameEmailMismatchedPasswords from cas_provider.forms import LoginForm, MergeLoginForm from . import signals +if VERSION >= (1, 10): + from django.urls import get_callable, reverse + user_is_authenticated = lambda user: user.is_authenticated +else: + from django.core.urlresolvers import get_callable, reverse + user_is_authenticated = lambda user: user.is_authenticated() + __all__ = ['login', 'validate', 'logout', 'service_validate'] INVALID_TICKET = 'INVALID_TICKET' @@ -34,16 +54,37 @@ INVALID_REQUEST = 'INVALID_REQUEST' INTERNAL_ERROR = 'INTERNAL_ERROR' ERROR_MESSAGES = ( - (INVALID_TICKET, u'The provided ticket is invalid.'), - (INVALID_SERVICE, u'Service is invalid'), - (INVALID_REQUEST, u'Not all required parameters were sent.'), - (INTERNAL_ERROR, u'An internal error occurred during ticket validation'), + (INVALID_TICKET, 'The provided ticket is invalid.'), + (INVALID_SERVICE, 'Service is invalid'), + (INVALID_REQUEST, 'Not all required parameters were sent.'), + (INTERNAL_ERROR, 'An internal error occurred during ticket validation'), ) logger = logging.getLogger(__name__) +_never_cache = cache_control(no_cache=True, must_revalidate=True) + + +def never_cache(view_func): + """ + Decorator that adds headers to a response so that it will + never be cached. + """ + @wraps(view_func, assigned=available_attrs(view_func)) + def _wrapped_view_func(request, *args, **kwargs): + response = view_func(request, *args, **kwargs) + patch_cache_control(response, no_cache=True, + must_revalidate=True, proxy_revalidate=True) + response['Pragma'] = 'no-cache' + return response + return _wrapped_view_func + + +@sensitive_post_parameters() +@csrf_protect +@never_cache def login(request, template_name='cas/login.html', success_redirect=settings.LOGIN_REDIRECT_URL, warn_template_name='cas/warn.html', **kwargs): @@ -70,7 +111,7 @@ def login(request, template_name='cas/login.html', if form.is_valid(): service = form.cleaned_data.get('service', None) try: - auth_args = dict(username=form.cleaned_data['email'], + auth_args = dict(username=form.cleaned_data['username'], password=form.cleaned_data['password']) if merge: # We only want to send the merge argument if it's @@ -78,7 +119,7 @@ def login(request, template_name='cas/login.html', # through the auth backends properly. auth_args['merge'] = merge user = authenticate(**auth_args) - except SameEmailMismatchedPasswords: + except: # Need to merge the accounts? if merge: # We shouldn't get here... @@ -87,53 +128,56 @@ def login(request, template_name='cas/login.html', base_url = reverse('cas_provider_merge') args = dict( success_redirect=success_redirect, - email=form.cleaned_data['email'], + username=form.cleaned_data['username'], ) if service is not None: args['service'] = service - args = urllib.urlencode(args) + args = urlencode(args) url = '%s?%s' % (base_url, args) logging.debug('Redirecting to %s', url) return HttpResponseRedirect(url) - + if user is None: - errors.append('Incorrect username and/or password.') + errors.append(_('Incorrect username and/or password.')) else: if user.is_active: auth_login(request, user) else: # Not a POST... if merge: - form = MergeLoginForm(initial={'service': service, 'email': request.GET.get('email')}) + form = MergeLoginForm(initial={'service': service, 'username': request.GET.get('username')}) else: form = LoginForm(initial={'service': service}) - if user is not None and user.is_authenticated(): + if user is not None and user_is_authenticated(user): # We have an authenticated user. if not user.is_active: - errors.append('This account is disabled.') + errors.append(_('This account is disabled. Please contact us if you feel it should be enabled again.')) else: # Send the on_cas_login signal. If we get an HttpResponse, return that. for receiver, response in signals.on_cas_login.send(sender=login, request=request, **kwargs): if isinstance(response, HttpResponse): return response - + if service is None: # Try and pull the service off the session service = request.session.pop('service', service) - + + signals.on_cas_login_success.send(sender=login, request=request, + service=service, **kwargs) + if service is None: # Normal internal success redirection. logging.debug('Redirecting to %s', success_redirect) return HttpResponseRedirect(success_redirect) else: if request.GET.get('warn', False): - return render_to_response(warn_template_name, { + return render(request, warn_template_name, { 'service': service, 'warn': False - }, context_instance=RequestContext(request)) - + }) + # Create a service ticket and redirect to the service. ticket = ServiceTicket.objects.create(service=service, user=user) if 'service' in request.session: @@ -145,9 +189,10 @@ def login(request, template_name='cas/login.html', return HttpResponseRedirect(url) logging.debug('Rendering response on %s, merge is %s', template_name, merge) - return render_to_response(template_name, {'form': form, 'errors': errors}, context_instance=RequestContext(request)) + return render(request, template_name, {'form': form, 'errors': errors}) +@never_cache def validate(request): """Validate ticket via CAS v.1 protocol """ @@ -176,21 +221,22 @@ def validate(request): logger.info('Validation failed.') return HttpResponse("no\n\n") - + +@never_cache def logout(request, template_name='cas/logout.html', auto_redirect=settings.CAS_AUTO_REDIRECT_AFTER_LOGOUT): url = request.GET.get('url', None) - if request.user.is_authenticated(): + if user_is_authenticated(request.user): for ticket in ServiceTicket.objects.filter(user=request.user): ticket.delete() auth_logout(request) if url and auto_redirect: return HttpResponseRedirect(url) - return render_to_response(template_name, {'url': url}, - context_instance=RequestContext(request)) + return render(request, template_name, {'url': url}) +@never_cache def proxy(request): targetService = request.GET['targetService'] pgt_id = request.GET['pgt'] @@ -201,7 +247,7 @@ def proxy(request): return _cas2_error_response(INVALID_TICKET) pt = ProxyTicket.objects.create(proxyGrantingTicket=proxyGrantingTicket, - user=proxyGrantingTicket.serviceTicket.user, + user=proxyGrantingTicket.user, service=targetService) return _cas2_proxy_success(pt.ticket) @@ -222,8 +268,8 @@ def ticket_validate(service, ticket_string, pgtUrl): except ServiceTicket.DoesNotExist: return _cas2_error_response(INVALID_TICKET) - ticketUrl = urlparse.urlparse(ticket.service) - serviceUrl = urlparse.urlparse(service) + ticketUrl = urlparse(ticket.service) + serviceUrl = urlparse(service) if not(ticketUrl.hostname == serviceUrl.hostname and ticketUrl.path == serviceUrl.path and ticketUrl.port == serviceUrl.port): return _cas2_error_response(INVALID_SERVICE) @@ -235,22 +281,23 @@ def ticket_validate(service, ticket_string, pgtUrl): if pgt: pgtIouId = pgt.pgtiou - if hasattr(ticket, 'proxyticket'): - pgt = ticket.proxyticket.proxyGrantingTicket + try: + proxyTicket = ticket.proxyticket + except ProxyTicket.DoesNotExist: + pass + else: + pgt = proxyTicket.proxyGrantingTicket # I am issued by this proxy granting ticket - if hasattr(pgt.serviceTicket, 'proxyticket'): - while pgt: - if hasattr(pgt.serviceTicket, 'proxyticket'): - proxies += (pgt.serviceTicket.service,) - pgt = pgt.serviceTicket.proxyticket.proxyGrantingTicket - else: - pgt = None + while pgt.pgt is not None: + proxies += (pgt.service,) + pgt = pgt.pgt user = ticket.user ticket.delete() return _cas2_sucess_response(user, pgtIouId, proxies) +@never_cache def service_validate(request): """Validate ticket via CAS v.2 protocol""" service = request.GET.get('service', None) @@ -262,6 +309,7 @@ def service_validate(request): return ticket_validate(service, ticket_string, pgtUrl) +@never_cache def proxy_validate(request): """Validate ticket via CAS v.2 protocol""" service = request.GET.get('service', None) @@ -272,31 +320,29 @@ def proxy_validate(request): def generate_proxy_granting_ticket(pgt_url, ticket): proxy_callback_good_status = (200, 202, 301, 302, 304) - uri = list(urlparse.urlsplit(pgt_url)) + uri = list(urlsplit(pgt_url)) pgt = ProxyGrantingTicket() - pgt.serviceTicket = ticket - pgt.targetService = pgt_url - - if hasattr(ticket, 'proxyGrantingTicket'): - # here we got a proxy ticket! tata! - pgt.pgt = ticket.proxyGrantingTicket + pgt.user = ticket.user + pgt.service = ticket.service + # Remember if it's a chained PGT. + pgt.pgt = getattr(ticket, 'proxyGrantingTicket', None) params = {'pgtId': pgt.ticket, 'pgtIou': pgt.pgtiou} - query = dict(urlparse.parse_qsl(uri[4])) + query = dict(parse_qsl(uri[4])) query.update(params) uri[3] = urlencode(query) try: - response = urllib2.urlopen(urlparse.urlunsplit(uri)) - except urllib2.HTTPError as e: + urlopen(urlunsplit(uri)) + except HTTPError as e: if not e.code in proxy_callback_good_status: - logger.debug('Checking Proxy Callback URL {} returned {}. Not issuing PGT.'.format(uri, e.code)) + logger.debug('Checking Proxy Callback URL {0} returned {1}. Not issuing PGT.'.format(uri, e.code)) return - except urllib2.URLError as e: - logger.debug('Checking Proxy Callback URL {} raised URLError. Not issuing PGT.'.format(uri)) + except URLError as e: + logger.debug('Checking Proxy Callback URL {0} raised URLError. Not issuing PGT.'.format(uri)) return pgt.save() @@ -308,18 +354,18 @@ def _cas2_proxy_success(pt): def _cas2_sucess_response(user, pgt=None, proxies=None): - return HttpResponse(auth_success_response(user, pgt, proxies), mimetype='text/xml') + return HttpResponse(auth_success_response(user, pgt, proxies), content_type='text/xml') def _cas2_error_response(code, message=None): - return HttpResponse(u''' + return HttpResponse(''' %(message)s ''' % { 'code': code, 'message': message if message else dict(ERROR_MESSAGES).get(code) - }, mimetype='text/xml') + }, content_type='text/xml') def proxy_success(pt): @@ -327,7 +373,7 @@ def proxy_success(pt): proxySuccess = etree.SubElement(response, CAS + 'proxySuccess') proxyTicket = etree.SubElement(proxySuccess, CAS + 'proxyTicket') proxyTicket.text = pt - return unicode(etree.tostring(response, encoding='utf-8'), 'utf-8') + return etree.tostring(response, encoding='unicode') def auth_success_response(user, pgt, proxies): @@ -343,8 +389,10 @@ def auth_success_response(user, pgt, proxies): identifiers = [i for sr, rr in signals.on_cas_collect_histories.send(sender=validate, for_user=user) for i in rr] + if identifiers: - attrs['identifiers'] = identifiers + # Singular `identifier`, as that is the name of the element tag(s). + attrs['identifier'] = identifiers if attrs: formatter = get_callable(settings.CAS_CUSTOM_ATTRIBUTES_FORMATER) @@ -360,4 +408,4 @@ def auth_success_response(user, pgt, proxies): proxyElement = etree.SubElement(proxiesElement, CAS + "proxy") proxyElement.text = proxy - return unicode(etree.tostring(response, encoding='utf-8'), 'utf-8') + return etree.tostring(response, encoding='unicode')