Please help in converting v4.x irule to 9.x

This should work. Probably not optimal, but it's the same logic

when HTTP_REQUEST {
  if { ([HTTP::host] eq "mydomain.com") && ![HTTP::header exists "WL-Proxy-SSL"] } {
    HTTP::redirect "https://mydomain.com[HTTP::uri]"
  } elseif { ([HTTP::host] eq "mydomain.com") && ([HTTP::uri] ends_with "/") } {
    HTTP::redirect "https://mydomain.com/index.html"
  } elseif { ([HTTP::host] eq "www.mydomainone.com") && ([HTTP::uri] ends_with "/") } {
    HTTP::redirect "https://www.mydomainone.com/index.html"
  } elseif { ([HTTP::host] eq "mydomainone.com") && ([HTTP::uri] ends_with "/") } {
    HTTP::redirect "https://mydomainone.com/index.html"
  } elseif { ([HTTP::host] eq "mydomainone.com") && ![HTTP::header exists "WL-Proxy-SSL"] } {
    HTTP::redirect "https://www.mydomainone.com[HTTP::uri]"
  } elseif { ([HTTP::host] eq "www.mydomainone.com") && ![HTTP::header exists "WL-Proxy-SSL"] } {
    HTTP::redirect "https://www.mydomainone.com[HTTP::uri]"
  } elseif { [HTTP::host] eq "192.160.1.1" } {
    discard
  } else {
    pool MYDOMAIN
  }
}

I'm almost positive we can optimize it but I'll have to dig through it to see how the logic flows and make sure all the cases are covered.

Hope this helps...

-Joe