code: def _get_artifact_response(artifact):
      
      response = flask.Response(
          artifact.data,
          mimetype=artifact.content_type)
      response.cache_control.public = True
      response.cache_control.max_age = 8640000
      response.set_etag(artifact.id)
      return response
docs: Gets the response object for the given artifact.
  
      This method may be overridden in environments that have a different way of
      storing artifact files, such as on-disk or S3.