old_contents: from django.conf.urls import patterns
  from django.conf.urls import url
  
  from .views import redirect
  
  
  urlpatterns = patterns('',
      url(r'^(?P<key>[a-zA-Z0-9]+)$', redirect, name='deflect-redirect'),
  )
  
new_contents: from django.conf import settings
  from django.conf.urls import patterns
  from django.conf.urls import url
  
  from .views import alias
  from .views import redirect
  
  
  urlpatterns = patterns('',
      url(r'^(?P<key>[a-zA-Z0-9]+)$', redirect, name='deflect-redirect'),
  )
  
  alias_prefix = getattr(settings, 'DEFLECT_ALIAS_PREFIX', '')
  if alias_prefix:
      urlpatterns += patterns('',
          url(r'^%s(?P<key>[a-zA-Z0-9]+)$' % alias_prefix, alias,
              name='deflect-alias'),
      )
  
subject: Add custom URL alias paths to URLconf