iRule for HTTP redirect

Which of the following are you trying to do:

1. Only when a user hits "www.xyz.com", redirect them to "www.abc.com"

2. When a user hits "www.xyz.com/sample", redirect them to "www.abc.com/sample"

This would handle number 1:

when HTTP_REQUEST {
if { [string tolower [HTTP::host]] eq "www.xyz.com" and [string tolower [HTTP::uri]] eq "/" } {
HTTP::redirect "http://www.abc.com" } }

This would handle number 2:

when HTTP_REQUEST {
if { [string tolower [HTTP::host]] eq "www.xyz.com" } {
HTTP::redirect "http://www.abc.com[HTTP::uri]" } }