Update middleware to new style classes

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

HISTORY.rst

@@ -49,6 +49,7 @@
 * Increase the default number of recently added documents and
   recently accessed documents from 40 to 400.
 * Integrate django-autoadmin into the core apps.
+* Update middleware to new style classes.
 
 3.1.11 (2019-04-XX)
 ===================

docs/releases/3.2.rst

@@ -73,6 +73,7 @@ Other changes
 * Increase the default number of recently added documents and
   recently accessed documents from 40 to 400.
 * Integrate django-autoadmin into the core apps.
+* Update middleware to new style classes.
 
 Removals
 --------

mayan/apps/common/middleware/ajax_redirect.py

@@ -2,9 +2,10 @@ from __future__ import unicode_literals
 
 from django.conf import settings
 from django.http import HttpResponseRedirect
+from django.utils.deprecation import MiddlewareMixin
 
 
-class AjaxRedirect(object):
+class AjaxRedirect(MiddlewareMixin):
     def process_request(self, request):
         ajax_referer = request.META.get('HTTP_X_ALT_REFERER')
 

mayan/apps/common/middleware/error_logging.py

@@ -4,11 +4,12 @@ import logging
 
 from django.core.exceptions import PermissionDenied
 from django.http import Http404
+from django.utils.deprecation import MiddlewareMixin
 
 logger = logging.getLogger(__name__)
 
 
-class ErrorLoggingMiddleware(object):
+class ErrorLoggingMiddleware(MiddlewareMixin):
     def process_exception(self, request, exception):
         if not isinstance(exception, (PermissionDenied, Http404)):
             # Don't log non critical exceptions

mayan/apps/common/middleware/timezone.py

@@ -4,9 +4,10 @@ import pytz
 
 from django.conf import settings
 from django.utils import timezone
+from django.utils.deprecation import MiddlewareMixin
 
 
-class TimezoneMiddleware(object):
+class TimezoneMiddleware(MiddlewareMixin):
     def process_request(self, request):
         if hasattr(request, 'session'):
             tzname = request.session.get(settings.TIMEZONE_SESSION_KEY)

mayan/settings/base.py

@@ -127,7 +127,7 @@ INSTALLED_APPS = (
     'drf_yasg',
 )
 
-MIDDLEWARE_CLASSES = (
+MIDDLEWARE = (
     'mayan.apps.common.middleware.error_logging.ErrorLoggingMiddleware',
     'django.middleware.security.SecurityMiddleware',
     'whitenoise.middleware.WhiteNoiseMiddleware',

mayan/settings/testing/base.py

@@ -12,8 +12,8 @@ COMMON_PRODUCTION_ERROR_LOG_PATH = '/tmp/mayan-errors.log'
 
 # Remove whitenoise from middlewares. Causes out of memory errors during test
 # suit
-MIDDLEWARE_CLASSES = [
-    cls for cls in MIDDLEWARE_CLASSES if cls != 'whitenoise.middleware.WhiteNoiseMiddleware'
+MIDDLEWARE = [
+    cls for cls in MIDDLEWARE if cls != 'whitenoise.middleware.WhiteNoiseMiddleware'
 ]
 
 # User a simpler password hasher
@@ -38,8 +38,8 @@ CELERY_EAGER_PROPAGATES_EXCEPTIONS = True
 BROKER_BACKEND = 'memory'
 
 # Remove middlewares not used for tests
-MIDDLEWARE_CLASSES = [
-    cls for cls in MIDDLEWARE_CLASSES if cls not in [
+MIDDLEWARE = [
+    cls for cls in MIDDLEWARE if cls not in [
         'common.middleware.error_logging.ErrorLoggingMiddleware',
         'django.middleware.security.SecurityMiddleware',
         'corsheaders.middleware.CorsMiddleware',