in src/main/java/com/googlesource/gerrit/plugins/serverconfig/ServerConfigServlet.java [198:208]
private void streamFile(HttpServletRequest req, HttpServletResponse res)
throws IOException {
File f = resolvePath(req).toFile();
res.setStatus(HttpServletResponse.SC_OK);
res.setContentType("application/octet-stream");
res.setContentLength((int) f.length());
OutputStream out = res.getOutputStream();
try (InputStream in = new FileInputStream(f)) {
ByteStreams.copy(in, out);
}
}