Traffic Redirection

You can try this

when HTTP_REQUEST {
    if {([HTTP::host] equals "irule.sample.com") && ([HTTP::uri] equals "/")} {
    HTTP::redirect "https://irule.newsample.com/launcher/irule"
    }
}

when HTTP_REQUEST {
  if { ([HTTP::host] == "irule.sample.com") && ([HTTP::path] == "/" )}{
    HTTP::respond 302 location "https://irule.newsample.com/launcher/irule"  Invokes a temporary 302 redirect, replace with 301 if you want permanent instead.
    event disable  Recommended function, if you use other iRules that also utilize the HTTP_REQUEST event.
    TCP::close  Recommended because it resolves the issue with redirect not functioning from the second web-browser tab if already invoked more than once. (issue applies to Chrome and HTTP/1.1).
  }
}

Test it out. I've added some comments to help you understand the lines. You will need to apply the iRule to your TCP/443 port listener Virtual Server. Also for the iRule to work, your VS must have a clientside SSL profile configured as well as a HTTP profile.

You can use this one. To know more please refer the Dev Central page.

when HTTP_REQUEST { if { [string tolower [HTTP::uri]] equals "/"} { HTTP::redirect "https://irule.newsample.com/launcher/irule" return } }