use x-real-ip headers

ipv6work/ipv6middleware.py

@@ -24,12 +24,16 @@ def block_ipv4(get_response):
             return get_response(request)
 
         path = request.path_info.lstrip('/')
-        x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
-        if x_forwarded_for:
-            client_ip = x_forwarded_for
-        else:
-            client_ip = request.META.get('REMOTE_ADDR')
-        print(is_ipv6_exempt(path), is_valid_ipv6(client_ip))
+
+        real_ip_headers = ['HTTP_X_REAL_IP', 'REMOTE_ADDR', 'HTTP_X_FORWARDED_FOR']
+        client_ip = None
+
+        for header in real_ip_headers:
+            client_ip = request.META.get(header)
+
+            if client_ip:
+                break
+
         if is_valid_ipv6(client_ip) or is_ipv6_exempt(path):
             return get_response(request)
         else: