misc: update login/logout to be class based views (#36331)

chrono/settings.py

@@ -145,6 +145,7 @@ if mellon is not None:
 LOGIN_URL = '/login/'
 LOGIN_REDIRECT_URL = '/'
 LOGOUT_URL = '/logout/'
+LOGOUT_REDIRECT_URL = '/'
 
 MELLON_ATTRIBUTE_MAPPING = {
     'email': '{attributes[email][0]}',

chrono/urls.py

@@ -21,7 +21,7 @@ from django.contrib.staticfiles.urls import staticfiles_urlpatterns
 
 from .urls_utils import decorated_includes, manager_required
 
-from .views import homepage, login, logout
+from .views import homepage, LoginView, LogoutView
 from .api.urls import urlpatterns as chrono_api_urls
 from .manager.urls import urlpatterns as chrono_manager_urls
 
@@ -31,8 +31,8 @@ urlpatterns = [
     url(r'^manage/', decorated_includes(manager_required,
         include(chrono_manager_urls))),
     url(r'^api/', include(chrono_api_urls)),
-    url(r'^logout/$', logout, name='auth_logout'),
-    url(r'^login/$', login, name='auth_login'),
+    url(r'^logout/$', LogoutView.as_view(), name='auth_logout'),
+    url(r'^login/$', LoginView.as_view(), name='auth_login'),
 ]
 
 if 'mellon' in settings.INSTALLED_APPS:

chrono/views.py

@@ -15,11 +15,13 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from django.conf import settings
-from django.contrib.auth import logout as auth_logout
 from django.contrib.auth import views as auth_views
 from django.http import HttpResponseRedirect
 from django.shortcuts import resolve_url
+from django.utils.decorators import method_decorator
 from django.utils.six.moves.urllib.parse import quote
+from django.views.decorators.cache import never_cache
+
 
 if 'mellon' in settings.INSTALLED_APPS:
     from mellon.utils import get_idps
@@ -28,28 +30,22 @@ else:
 
 
 class LoginView(auth_views.LoginView):
-    def dispatch(self, request, *args, **kwargs):
+    def get(self, request, *args, **kwargs):
         if any(get_idps()):
-            if 'next' not in request.GET:
+            if not 'next' in request.GET:
                 return HttpResponseRedirect(resolve_url('mellon_login'))
             return HttpResponseRedirect(resolve_url('mellon_login') + '?next='
                                         + quote(request.GET.get('next')))
-        return super(LoginView, self).dispatch(request, *args, **kwargs)
-    pass
+        return super(LoginView, self).get(request, *args, **kwargs)
 
 
-login = LoginView.as_view()
+class LogoutView(auth_views.LogoutView):
+    @method_decorator(never_cache)
+    def dispatch(self, request, *args, **kwargs):
+        if any(get_idps()):
+            return HttpResponseRedirect(resolve_url('mellon_logout'))
+        return super(LogoutView, self).dispatch(request, *args, **kwargs)
 
 
-def logout(request, next_page=None):
-    if any(get_idps()):
-        return HttpResponseRedirect(resolve_url('mellon_logout'))
-    auth_logout(request)
-    if next_page is not None:
-        next_page = resolve_url(next_page)
-    else:
-        next_page = '/'
-    return HttpResponseRedirect(next_page)
-
 def homepage(request, *args, **kwargs):
     return HttpResponseRedirect(resolve_url('chrono-manager-homepage'))