def METHOD_NAME(self, request, session_id, *args):
    try:
        session = UploadSession.objects.METHOD_NAME(
            id=session_id
        )
    except UploadSession.DoesNotExist:
        raise Http404('No session found')
    return Response({
        'token': session.token,
        'progress': session.progress,
        'processed': session.processed
    })