response.setEntity("", MediaType.TEXT_PLAIN);
} else if (body instanceof Response) {
// its already a restlet response, so dont do anything
LOG.debug("Using existing Restlet Response from exchange body: {}", body);
} else if (body instanceof InputStream) {
response.setEntity(new InputRepresentation(out.getBody(InputStream.class), mediaType));
} else if (body instanceof File) {
response.setEntity(new FileRepresentation(out.getBody(File.class), mediaType));
} else {
// fallback and use string
String text = out.getBody(String.class);