private boolean readMessage(HttpRequest request, HttpResponse response) throws IOException {
String messageStr = request.getParameter("message");
String topicStr = request.getParameter("topic");
if( messageStr == null ) return false;
UUID message = UUID.parse( messageStr );
UUID topicUuid = UUID.parse( topicStr );
showMessage(topicUuid, message, request, response);
return true;
}