Fix compatibility for older versions of Django

oidc_provider/middleware.py

@@ -1,4 +1,8 @@
-from django.utils.deprecation import MiddlewareMixin
+try:
+    # https://docs.djangoproject.com/en/1.10/topics/http/middleware/#upgrading-pre-django-1-10-style-middleware
+    from django.utils.deprecation import MiddlewareMixin
+except ImportError:
+    MiddlewareMixin = object
 
 from oidc_provider import settings
 from oidc_provider.lib.utils.common import get_browser_state_or_default

oidc_provider/tests/test_middleware.py

@@ -1,6 +1,6 @@
 from django.conf.urls import url
 from django.test import TestCase, override_settings
-from django.views import View
+from django.views.generic import View
 from mock import mock
 
 
@@ -10,10 +10,13 @@ class StubbedViews:
 
     urlpatterns = [url('^test/', SampleView.as_view())]
 
+MW_CLASSES = ('django.contrib.sessions.middleware.SessionMiddleware',
+              'oidc_provider.middleware.SessionManagementMiddleware')
+
 
 @override_settings(ROOT_URLCONF=StubbedViews,
-                   MIDDLEWARE=('django.contrib.sessions.middleware.SessionMiddleware',
-                               'oidc_provider.middleware.SessionManagementMiddleware'),
+                   MIDDLEWARE=MW_CLASSES,
+                   MIDDLEWARE_CLASSES=MW_CLASSES,
                    OIDC_SESSION_MANAGEMENT_ENABLE=True)
 class MiddlewareTestCase(TestCase):