Added MiddlewareMixin for compatibility reasons

djangoseo/middleware.py

@@ -10,7 +10,28 @@
 logger = getLogger(__name__)
 
 
-class RedirectsMiddleware(object):
+# TODO: replace after upgrade to Django 1.10
+class MiddlewareMixin(object):
+    """
+    This mixin a full copy of Django 1.10 django.utils.deprecation.MiddlewareMixin.
+    Needed for compatibility reasons.
+    """
+    def __init__(self, get_response=None):
+        self.get_response = get_response
+        super(MiddlewareMixin, self).__init__()
+
+    def __call__(self, request):
+        response = None
+        if hasattr(self, 'process_request'):
+            response = self.process_request(request)
+        if not response:
+            response = self.get_response(request)
+        if hasattr(self, 'process_response'):
+            response = self.process_response(request, response)
+        return response
+
+
+class RedirectsMiddleware(MiddlewareMixin):
 
     def process_exception(self, request, exception):
         if not getattr(settings, 'SEO_USE_REDIRECTS', False):