Should fix #406

Should now work with old-style Middleware and the Django 1.10 new style

oauth2_provider/middleware.py

@@ -1,8 +1,18 @@
 from django.contrib.auth import authenticate
 from django.utils.cache import patch_vary_headers
 
+# bastb Django 1.10 has updated Middleware. This code imports the Mixin required to get old-style
+# middleware working again
+# More? 
+#  https://docs.djangoproject.com/en/1.10/topics/http/middleware/#upgrading-pre-django-1-10-style-middleware
+try:
+    from django.utils.deprecation import MiddlewareMixin
+    middleware_parent_class = MiddlewareMixin
+except ImportError:
+    middleware_parent_class = object
 
-class OAuth2TokenMiddleware(object):
+
+class OAuth2TokenMiddleware(middleware_parent_class):
     """
     Middleware for OAuth2 user authentication