http to https redirect

Thanks for you input. I should have added some additional information about the trigger that launches the https://credit_card_athorization_page.

I'm passing query parameters when VS1 is redirected to VS2. I looked at the irule documentation and it appears that I should be using HTTP::query although there [getfield [HTTP::uri] ? 2] is the preferred method for retrieving the string following the "?"

Having read that I modified the rule to look like:

when HTTP_REQUEST {  
 log local0. "redirecting to https" 
 if { [HTTP::uri] contains "/this/directory/"} 
  {  HTTP::redirect https://"this.domain/"[getfield [HTTP::uri] ? 2]} 
 } 

I'm not even sure this is correct but I'm still unable to generate a different behavior.