code: def json(request, *args, **kwargs):
      
      # coerce to dictionary
      params = dict(request.GET.items())
      
      callback = params.pop('callback', None)
      url = params.pop('url', None)
      
      if not url:
          return HttpResponseBadRequest('Required parameter missing: URL')
      
      try:
          provider = oembed.site.provider_for_url(url)
          if not provider.provides:
              raise OEmbedMissingEndpoint()
      except OEmbedMissingEndpoint:
          raise Http404('No provider found for %s' % url)
      
      query = dict([(smart_str(k), smart_str(v)) for k, v in params.items() if v])
      
      try:
          resource = oembed.site.embed(url, **query)
      except OEmbedException, e:
          raise Http404('Error embedding %s: %s' % (url, str(e)))
  
      response = HttpResponse(mimetype='application/json')
      json = resource.json
      
      if callback:
          response.write('%s(%s)' % (defaultfilters.force_escape(callback), json))
      else:
          response.write(json)
      
      return response
docs: The oembed endpoint, or the url to which requests for metadata are passed.
      Third parties will want to access this view with URLs for your site's
      content and be returned OEmbed metadata.