HTTP::header replace error

Yes. There are a few irules.

irule 1

when HTTP_REQUEST { 
       if { ([string tolower [HTTP::host]] starts_with "abc") } {
                HTTP::respond 301 Location https://www.[HTTP::host][HTTP::uri]
                }
}

irule 2

when HTTP_REQUEST { 
       if { ([string tolower [HTTP::host]] starts_with "abccatseguin.com ") } {
                HTTP::respond 301 Location  https://www.abc.com
                }
}

irule 3

when HTTP_REQUEST {
    set the URL here, log it on the response
   set url [HTTP::header Host][HTTP::uri]
   set vip [IP::local_addr]:[TCP::local_port]
   set hsl [HSL::open -proto UDP -pool splunk]
}

when HTTP_RESPONSE {
   set client [IP::client_addr]:[TCP::client_port]
   set snat [IP::local_addr]
   set node [IP::server_addr]:[TCP::server_port]
   set nodeResp [HTTP::status]
   set hsl [HSL::open -proto UDP -pool splunk]

    log connection info
   HSL::send $hsl "Client: $client -> SNAT: $snat -> VIP: $vip -> URL: $url -> Node: $node with response $nodeResp"
}

Thanks