}
private Response getLink(File zipDir, Message m) {
if (zipDir.exists() && new File(zipDir.getAbsolutePath(), "src.zip").exists()) {
UriBuilder builder = ui.getAbsolutePathBuilder();
String link = builder.queryParam(SOURCE_QUERY).build().toString();
// TODO : move it into a resource template
StringBuilder sb = new StringBuilder();
sb.append("<html xmlns=\"http://www.w3.org/1999/xhtml\">");
sb.append("<head><title>Download the source</title></head>");
sb.append("<body>");