how to modify the _sys_https_redirect to exempt a specific uri and use a specific pool or node for that uri?

I am trying to modify the _sys_https_redirect to

1. exempt a specific uri in my site
2. browse that specific uri in HTTP
3. use a specific pool for that uri
4. retains the function of the _sys_https_redirect on all the rest of URIs in my site

but I can't make it work.

when HTTP_REQUEST {

if { ([HTTP::uri] eq "abc.com/directory/directory/") } 

{ 

pool pool-A 

} 

else 

{ HTTP::redirect https://[getfield [HTTP::host] ":" 1][HTTP::uri] }

}