code: def oembed_schema(request):
      
      current_domain = Site.objects.get_current().domain
      url_schemes = [] # a list of dictionaries for all the urls we can match
      endpoint = reverse('oembed_json') # the public endpoint for our oembeds
      providers = oembed.site.get_providers()
  
      for provider in providers:
          # first make sure this provider class is exposed at the public endpoint
          if not provider.provides:
              continue
          
          match = None
          if isinstance(provider, DjangoProvider):
              # django providers define their regex_list by using urlreversing
              url_pattern = resolver.reverse_dict.get(provider._meta.named_view)
  
              # this regex replacement is set to be non-greedy, which results
              # in things like /news/*/*/*/*/ -- this is more explicit
              if url_pattern:
                  regex = re.sub(r'%\(.+?\)s', '*', url_pattern[0][0][0])
                  match = 'http://%s/%s' % (current_domain, regex)
          elif isinstance(provider, HTTPProvider):
              match = provider.url_scheme
          else:
              match = provider.regex
  
          if match:
              url_schemes.append({
                  'type': provider.resource_type,
                  'matches': match,
                  'endpoint': endpoint
              })
      
      url_schemes.sort(key=lambda item: item['matches'])
      
      response = HttpResponse(mimetype='application/json')
      response.write(simplejson.dumps(url_schemes))
      return response
docs: A site profile detailing valid endpoints for a given domain.  Allows for
      better auto-discovery of embeddable content.
  
      OEmbed-able content lives at a URL that maps to a provider.