conditional stream irule

Try this. It should help out. Can't test it at the moment to verify, but I think it'll work.

when HTTP_REQUEST { 
     Disable the stream filter for client requests 
    STREAM::disable 
     Disable compression 
    HTTP::header remove "Accept-Encoding" 

     set variables here because you can't access these in HTTP_RESPONSE
    set hostLower [string tolower [HTTP::host]]
    set pathLower [string tolower [HTTP::path]]
     The PATH is the URI without the query string part
}

when HTTP_RESPONSE { 
    if { ($hostLower contains "connect-q.abbvie.net") && ($pathLower contains "/lstsetng.aspx")} {
         Enable the stream filter for text responses only 
        if {[HTTP::header value Content-Type] contains "text"}{ 
             Replace 'old_text' with 'new_text' 
            STREAM::expression {@[Hh][[Tt][Tt]Pp(/|&.x2f;){2}@} 

             Enable the stream filter for this response only 
            STREAM::enable 
        }
    } 
}