Added multi-domain capabilities

src/pretix/presale/middleware.py

@@ -1,8 +1,12 @@
+from urllib.parse import urljoin
+
 from django.core.urlresolvers import resolve
 from django.http import Http404
+from django.shortcuts import redirect
 from django.utils.translation import ugettext_lazy as _
 
 from pretix.base.models import Event
+from pretix.multidomain.urlreverse import get_domain
 
 
 class EventMiddleware:
@@ -15,10 +19,36 @@ class EventMiddleware:
 
         if 'event.' in url_name and 'event' in url.kwargs:
             try:
-                request.event = Event.objects.current.filter(
-                    slug=url.kwargs['event'],
-                    organizer__slug=url.kwargs['organizer'],
-                ).select_related('organizer')[0]
+                if hasattr(request, 'organizer'):
+                    # We are on an organizer's custom domain
+                    if 'organizer' in url.kwargs and url.kwargs['organizer']:
+                        if url.kwargs['organizer'] != request.organizer.slug:
+                            raise Http404(_('The selected event was not found.'))
+                        path = "/" + request.get_full_path().split("/", 2)[-1]
+                        return redirect(path)
+
+                    request.event = Event.objects.current.filter(
+                        slug=url.kwargs['event'],
+                        organizer=request.organizer,
+                    ).select_related('organizer')[0]
+                else:
+                    # We are on our main domain
+                    if 'organizer' not in url.kwargs:
+                        raise Http404(_('The selected event was not found.'))
+
+                    request.event = Event.objects.current.filter(
+                        slug=url.kwargs['event'],
+                        organizer__slug=url.kwargs['organizer']
+                    ).select_related('organizer')[0]
+
+                    # If this organizer has a custom domain, send the user there
+                    domain = get_domain(request.event)
+                    if domain:
+                        if request.port and request.port not in (80, 443):
+                            domain = '%s:%d' % (domain, request.port)
+                        path = request.get_full_path().split("/", 2)[-1]
+                        return redirect(urljoin('%s://%s' % (request.scheme, domain), path))
+
             except IndexError:
                 raise Http404(_('The selected event was not found.'))