I am using [1] Nevow in CGI environment

Both relative and absolute URLs cannnot be used in xml templates. Consider the following apache setup.

http://server/blog is rewritten (mod_rewrite) to http://server/cgi-bin/blog/index.py

Now if an xml template contains this line <link rel="stylesheet" href="styles/screen.css" type="text/css" />

without rewrite the URL the browser will see is http://server/cgi-bin/blog/styles/screen.css

and with rewritten the browser will see http://server/blog/styles/screen.css

This depends on the current page, so sometimes the browser will see http://server/blog/2004/04/styles/screen.css (as the URL is relative).

To cope with this problem with url.URL generation, I remember the parent-root URL in ctx. But I feel this is difficult to do with xml-templates as they are controlled by the user. Is there anyway to do translation in nevow?

[1] http://srid.bsdnerds.org/blog/2005/02/06/nevow-with-cgi-and-wsgi-adaptor/