@Override
 public void handle(HttpExchange t) throws IOException {
   if (RemoteUtil.deny(t)) {
     throw new IOException("Access denied");
   }
   String id = RemoteUtil.getId("thumb/", t);
   LOGGER.trace("web thumb req " + id);
   if (id.contains("logo")) {
     RemoteUtil.sendLogo(t);
     return;
   }
   RootFolder root = parent.getRoot(RemoteUtil.userName(t), t);
   if (root == null) {
     LOGGER.debug("weird root in thumb req");
     throw new IOException("Unknown root");
   }
   final DLNAResource r = root.getDLNAResource(id, root.getDefaultRenderer());
   if (r == null) {
     // another error
     LOGGER.debug("media unknown");
     throw new IOException("Bad id");
   }
   InputStream in;
   if (!configuration.isShowCodeThumbs() && !r.isCodeValid(r)) {
     // we shouldn't show the thumbs for coded objects
     // unless the code is entered
     in = r.getGenericThumbnailInputStream(null);
   } else {
     r.checkThumbnail();
     in = r.getThumbnailInputStream();
   }
   Headers hdr = t.getResponseHeaders();
   hdr.add("Content-Type", r.getThumbnailContentType());
   hdr.add("Accept-Ranges", "bytes");
   hdr.add("Connection", "keep-alive");
   t.sendResponseHeaders(200, in.available());
   OutputStream os = t.getResponseBody();
   LOGGER.trace("input is {} output is {}", in, os);
   RemoteUtil.dump(in, os);
 }