HTTP Rewrite header + pool based on URI

Hi,

here an rule example :

when RULE_INIT {
    set external_hostname "externalsite.com"  
    set internal_hostname "internalsite.com"  
}
when CLIENT_ACCEPTED { 
    set default_pool [LB::server pool] 
} 
when HTTP_REQUEST {
     Disable the stream filter for requests
    STREAM::disable

     Remove this header to prevent server from compression response
    HTTP::header remove Accept-Encoding

    if { ([string tolower [HTTP::path]] eq "/foobar") } {
        HTTP::host [string map {$external_hostname $internal_hostname} [HTTP::host]] 
        pool internal_pool
    } else { 
        pool $default_pool
    }
}
when HTTP_RESPONSE {
     Rewrite the Location header for redirects 
    if { [HTTP::header exists Location] }{ 
        HTTP::header replace Location [string map {$external_hostname $internal_hostname} [HTTP::header Location]] 
    } 

     Rewrite the response content using a stream profile if it is text 
    if { [HTTP::header Content-Type] contains "text" } { 

         Set the stream expression with the find/replace strings 
        STREAM::expression "@xyz.company.com@abc.company.com@" 

         Enable the stream filter 
        STREAM::enable 
    } 
}