htaccess exclusion for a variable URL

Question

I have a Zen Cart site where I need to exclude one URL from being rewritten. The problem is that a part of the URL is different every time so I need some wildcard and I'm not sure how to do it.

This is how my URL looks like:

http://XXXXXX.com/index.php?zenid=9cbbba111d0e229809dbf5a0053c2486&main_page=wp_callback

The zenid characters are different every time so I'd need a rule that would NOT rewrite URLs that end with main_page=wp_callback.

Can anyone tell me how to do that, please? Thank you!

Answer 1

Try to add something like this above the other rewrite rules:

# Stop rewrite processing if the query string contains main_page=wp_callback
RewriteCond %{QUERY_STRING} main_page=wp_callback
RewriteRule . - [L]

Answer 2

Rewrite rules are regex. Here is the regex matching everything ending with main_page=wp_callback :

index.php.*main_page=wp_callback$