small fixes for django 2.0

src/utils/middleware.py

@@ -3,10 +3,9 @@ between Tags, an at the beginning and the end of the content."""
 from django.utils.html import strip_spaces_between_tags
 
 
-class CompressHtmlMiddleware(object):
+class CompressHtmlMiddleware:
     """This Middleware compresses strips the spaces between tags, and at the
     beginning and the end of the content."""
-    # TODO: Port to django 1.10 and upward
 
     def __init__(self, get_response):
         """
@@ -32,7 +31,23 @@ class CompressHtmlMiddleware(object):
                 response.content).strip()
         return response
 
-class SetRemoteAddrFromForwardedFor(object):
+
+class SetRemoteAddrFromForwardedFor:
+    def __init__(self, get_response):
+        self.get_response = get_response
+        # One-time configuration and initialization.
+
+    def __call__(self, request):
+        # Code to be executed for each request before
+        # the view (and later middleware) are called.
+
+        response = self.get_response(request)
+
+        # Code to be executed for each request/response after
+        # the view is called.
+
+        return response
+
     def process_request(self, request):
         try:
             real_ip = request.META['HTTP_X_FORWARDED_FOR']