[racket] Problem with default-indices files in Web-Server

I wanted to make a 100% racket website (no html files), using the
standard plt-web-server.exe (version 5.2.1, Windows). I need that all
the pages are customized to each user.

So I edited the configuration-table.rkt file to include the index.rkt
in the list of default indices.

;--
;Edited File: configuration-table.rkt
( ...
 (default-host-table
   (host-table
     (default-indices "index.rkt" "index.html" "index.htm")
     ...))
 ...)
;--

For example, I use the example from
http://docs.racket-lang.org/web-server/servlet.html as "index.rkt"
(with (require web-server/http/xexpr)) in the web-root/htdoc
directory, and launched the webserver.

If I go to http://localhost/index.rkt , the example works as expected
and I see the "Hi Mom!" message.

But if I go to http://localhost/ , then I get the source code of the
"index.rkt" file, something like.
#lang racket (require web-server/managers/none) ... (...(...(...(body
(h1 "Hi Mom!")))))
but I expected to see only the "Hi Mom!" message.

Now I'm using a index.htm file with a redirection:
<meta http-equiv="REFRESH" content="1;url=/index.rkt">
so the problem is almost solved.

But I don't know if there is a better solution. Another problem is
that the source code of the .rkt files may have some secret info that
the users should not see (this is not my case).

Gustavo