if (!resource.hasContent()) return;
	public void handle(DavContext ctxt) throws DavException, IOException {		DavResource resource = UrlNamespace.getResource(ctxt);		if (!resource.hasContent())			throw new DavException("empty content", HttpServletResponse.SC_NO_CONTENT, null);		HttpServletResponse resp = ctxt.getResponse();		resp.setContentType(resource.getContentType());		resp.setContentLength(resource.getContentLength());		ByteUtil.copy(resource.getContent(), true, ctxt.getResponse().getOutputStream(), false);	}