text: from django.conf.urls import patterns, url
  from django.http.response import HttpResponse
  from django.views.generic import View
  
  
  def url_match_xss(request, foo, bar, no_taint=None):
      return HttpResponse('url_match_xss: {} {}'.format(foo, bar))
  
  
  def get_params_xss(request):
      return HttpResponse(request.GET.get("untrusted"))
  
  
  def post_params_xss(request):
      return HttpResponse(request.POST.get("untrusted"))
  
  
  class Foo(object):
      # Note: since Foo is used as the super type in a class view, it will be able to handle requests.
  
      # TODO: Currently we don't flag `untrusted` as a DjangoRequestParameter
      def post(self, request, untrusted):
          return HttpResponse('Foo post: {}'.format(untrusted))
  
  
  class ClassView(View, Foo):
      # TODO: Currently we don't flag `untrusted` as a DjangoRequestParameter
      def get(self, request, untrusted):
          return HttpResponse('ClassView get: {}'.format(untrusted))
  
  
  def show_articles(request, page_number=1):
      page_number = int(page_number)
      return HttpResponse('articles page: {}'.format(page_number))
  
  
  def xxs_positional_arg(request, arg0, arg1, no_taint=None):
      return HttpResponse('xxs_positional_arg: {} {}'.format(arg0, arg1))
  
  
  urlpatterns = [
      url(r'^url_match/(?P<foo>[^/]+)/(?P<bar>[^/]+)$', url_match_xss),
      url(r'^get_params$', get_params_xss),
      url(r'^post_params$', post_params_xss),
      url(r'^class_view/(?P<untrusted>.+)$', ClassView.as_view()),
  
      # one pattern to support `articles/page-<n>` and ensuring that articles/ goes to page-1
      url(r'articles/^(?:page-(?P<page_number>\d+)/)?$', show_articles),
      # passing as positional argument is not the recommended way of doing things, but it is certainly
      # possible
      url(r'^([^/]+)/(?:foo|bar)/([^/]+)$', xxs_positional_arg, name='xxs_positional_arg'),
  ]
  
  
  # Using patterns() for routing
  
  def show_user(request, username):
      pass
  
  
  urlpatterns = patterns(url(r'^users/(?P<username>[^/]+)$', show_user))
  
  
  # Show we understand the keyword arguments to django.conf.urls.url
  
  def we_understand_url_kwargs(request):
      pass
  
  
  urlpatterns = [
      url(view=we_understand_url_kwargs, regex=r'^specifying-as-kwargs-is-not-a-problem$')
  ]
  