1 files changed, 89 insertions, 0 deletions
diff --git a/webapp/django/views/defaults.py b/webapp/django/views/defaults.py
new file mode 100644
index 0000000000..8a8fa474b9
--- /dev/null
+++ b/webapp/django/views/defaults.py
@@ -0,0 +1,89 @@
+from django.core.exceptions import ObjectDoesNotExist
+from django.template import Context, RequestContext, loader
+from django.contrib.contenttypes.models import ContentType
+from django.contrib.sites.models import Site
+from django import http
+
+def shortcut(request, content_type_id, object_id):
+    "Redirect to an object's page based on a content-type ID and an object ID."
+    # Look up the object, making sure it's got a get_absolute_url() function.
+    try:
+        content_type = ContentType.objects.get(pk=content_type_id)
+        obj = content_type.get_object_for_this_type(pk=object_id)
+    except ObjectDoesNotExist:
+        raise http.Http404, "Content type %s object %s doesn't exist" % (content_type_id, object_id)
+    try:
+        absurl = obj.get_absolute_url()
+    except AttributeError:
+        raise http.Http404, "%s objects don't have get_absolute_url() methods" % content_type.name
+
+    # Try to figure out the object's domain, so we can do a cross-site redirect
+    # if necessary.
+
+    # If the object actually defines a domain, we're done.
+    if absurl.startswith('http://') or absurl.startswith('https://'):
+        return http.HttpResponseRedirect(absurl)
+
+    object_domain = None
+
+    # Otherwise, we need to introspect the object's relationships for a
+    # relation to the Site object
+    opts = obj._meta
+
+    # First, look for an many-to-many relationship to sites
+    for field in opts.many_to_many:
+        if field.rel.to is Site:
+            try:
+                object_domain = getattr(obj, field.name).all()[0].domain
+            except IndexError:
+                pass
+            if object_domain is not None:
+                break
+
+    # Next look for a many-to-one relationship to site
+    if object_domain is None:
+        for field in obj._meta.fields:
+            if field.rel and field.rel.to is Site:
+                try:
+                    object_domain = getattr(obj, field.name).domain
+                except Site.DoesNotExist:
+                    pass
+                if object_domain is not None:
+                    break
+
+    # Fall back to the current site (if possible)
+    if object_domain is None:
+        try:
+            object_domain = Site.objects.get_current().domain
+        except Site.DoesNotExist:
+            pass
+
+    # If all that malarkey found an object domain, use it; otherwise fall back
+    # to whatever get_absolute_url() returned.
+    if object_domain is not None:
+        protocol = request.is_secure() and 'https' or 'http'
+        return http.HttpResponseRedirect('%s://%s%s' % (protocol, object_domain, absurl))
+    else:
+        return http.HttpResponseRedirect(absurl)
+
+def page_not_found(request, template_name='404.html'):
+    """
+    Default 404 handler.
+
+    Templates: `404.html`
+    Context:
+        request_path
+            The path of the requested URL (e.g., '/app/pages/bad_page/')
+    """
+    t = loader.get_template(template_name) # You need to create a 404.html template.
+    return http.HttpResponseNotFound(t.render(RequestContext(request, {'request_path': request.path})))
+
+def server_error(request, template_name='500.html'):
+    """
+    500 error handler.
+
+    Templates: `500.html`
+    Context: None
+    """
+    t = loader.get_template(template_name) # You need to create a 500.html template.
+    return http.HttpResponseServerError(t.render(Context({})))