don't include www in subdomain

judge/middleware.py

@@ -10,6 +10,9 @@ from judge.models import Organization
 from judge.utils.views import generic_message
 
 
+USED_DOMAINS = ["www"]
+
+
 class ShortCircuitMiddleware:
     def __init__(self, get_response):
         self.get_response = get_response
@@ -101,15 +104,19 @@ class SubdomainMiddleware(object):
 
         domain = request.get_host()
         site = get_current_site(request).domain
-        subdomain = domain[: len(domain) - len(site)]
-        if len(subdomain) > 1:
+        subdomain = domain[: len(domain) - len(site)].lower()
+
+        if len(subdomain) <= 1:
+            return self.get_response(request)
+
         subdomain = subdomain[:-1]
+
+        if subdomain in USED_DOMAINS:
+            return self.get_response(request)
+
         try:
             organization = Organization.objects.get(slug=subdomain)
-                if (
-                    request.profile
-                    and organization in request.profile.organizations.all()
-                ):
+            if request.profile and organization in request.profile.organizations.all():
                 request.organization = organization
             else:
                 if request.profile: