beginner's mod_rewrite recursion problem

[Kynn Jones <kynnjo@xxxxxxxxx>]

I'm new to mod_rewrite, and need advice on whether what i want to do is possible.  I have a physical structure analogous to the following:

/path/to/docroot/foo/bar/index.html

/path/to/docroot/foo/css

/path/to/docroot/foo/images

/path/to/docroot/frobozz/css

/path/to/docroot/frobozz/images

I want that when a user points the browser to http://myserver/frobozz/, the server internally maps that request to the file /path/to/docroot/foo/bar/index.html, but if the browser is pointed to http://myserver/frobozz/css/somefile.css, the retrieved file will be the one at /path/to/docroot/frobozz/css/somefile.css.

I thought I could solve the problem by putting this in the file /path/to/docroot/.htaccess:

RewriteEngine on

RewriteBase /

RewriteRule ^foo/?$ bar/html/index.html [L]

This almost worked: pointing the browser to http://myserver/frobozz/ caused the page at /path/to/docroot/foo/bar/index.html to be served, while pointing the browser to http://myserver/frobozz/css/somefile.css still gave me the document at /path/to/docroot/frobozz/css/somefile.css.

The problem is that the file at /path/to/docroot/foo/bar/index.html requires other local files with directives like:

<img src="">

...and these requests fail with error messages like "File does not exist: /path/to/docroot/images, referer: http://myserver/frobozz/".

What appears that is happening is that the '../images/arrow.gif' is being interpreted as 'http://myserver/frobozz/../images/arrow.gif' and not as 'http://myserver/foo/bar/../images/arrow.gif'.

I tried to fix this by adding the following rule at the end of /path/to/docroot/.htaccess:

RewriteCond %{HTTP_REFERER} ^http://myserver/frobozz/?$

RewriteRule ^(.*) foo$1

...but this causes a recursion error: "Request exceeded the limit of 10 internal redirects...".

Any advice would be greatly appreciated!

In particular, what's the best way to inspect the values of the various variables that are available for the TestString in RewriteCond, including the special ones like THE_REQUEST and IS_SUBREQ?

TIA!

Kynn