tile.servletResp.setHeader("geowebcache-message", message);
TileLayer layer = tile.getLayer();
if (layer != null) {
layer.setExpirationHeader(tile.servletResp, (int) tile.getTileIndex()[2]);
if (layer.useETags()) {
String ifNoneMatch = tile.servletReq.getHeader("If-None-Match");
if (ifNoneMatch != null && ifNoneMatch.equals("gwc-blank-tile")) {
tile.servletResp.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
return;
} else {