apache help: hiding real url

[jaylee]

i'm interesting in doing the following:

when user click on a link on my web page http://mysite.com/site1/, i would like to send the user to http://site1.com/abc.cgi?query=xyz

i'm currently doing a 404 redirection using .htaccess in the /site1/ directory with: ErrorDocument 404 http://site1.com/

but i heard that using .htaccess really reduce a lot of server performance.

is there a better (or more flexible) way for me to achieve this goal or maybe configure this some how within the apahce configuration file?

i need to have maintain hundreds of hiding urls.

what's the best solution performance wise?

thanks.

[Anon]

You could try using Apache's url-rewriteing module - that works on rules, not a huge dictionary, so it could filter site1.com/asdf to site1.com/go?to=asdf
I think this works so that it filters out real links before doing the re-write, you'll have to check.