Hello,

I try to configure response header in service the resource of my portlet (new feature in 286). According to the spec ResourceResponse.setProperty should do it if invoked before ResourceResponse.setContentType - see example

public void serveResource(ResourceRequest request, ResourceResponse response) throws PortletException, IOException {

 response.setProperty("Pragma", "public");
 response.setProperty("Expires", "0");
 response.setContentType("text/html");
 PrintWriter pw = response.getWriter();
 pw.write("Hello");
}