mod rewrite question

[Ron]

I am trying to solve a problem using mod_rewrite:

I'd like to take any uri that contains a string, say "foo", that occurs anywhere in the request, and redirect it to an error page.

For example, if someone tries to get to http://www.domain.com/willy/tryit.php?a=b&foo=3&date=4
or
http://www.domain.com/will/doit.php?foo=4&ron=33&andSoOn=5

They will be redirected to

http://www.domain.com/directory/errorpage.html


I just can't get my .htaccess file to accomplish this seemingly easy task.
The problem seems to reside in the fact that the target string is after the question mark or the ampersand... if I search for a string within the filename, the code works fine.

I am trying to match using %{REQUEST_URI}

Any suggestions?

[Ron]

Solved using %{QUERY_STRING} instead.

Apparently, mod_rewrites idea of what REQUEST_URI is different that the environment variable REQUEST_URI contains.

Somewhere it's getting split into REQUEST_URI is being changed to something like REQUEST_FILENAME and QUERY_STRING

I really ought to read a book about it someday.

[Vin DSL]

I was just going to suggest that...