Irule Vs rewrite - FQDN hostname

Mr__T So a few things stand out to me. First is that you don't want a redirect you would like a rewrite but in your rewrite it looks like you want to add on a port at the end of the host which shouldn't be necessary because your pool member should be listening on that port already. The last is whenever they hit just "/" as the URI do you want to redirect them to a specific path? So as an example of how I believe this works.

User requests https://appname.domain.com/
F5 responds with a redirect to https://appname.domain.com/something/something/something/etc/etc/etc.html
User now requests https://appname.domain.com/something/something/something/something/etc/etc/etc.html
F5 rewrites appname.domain.com to longappname.com
F5 sends request to server on https://longappname.com/something/something/something/etc/etc/etc.html
Response comes back from server and F5 rewrites longappname.com to appname.domain.com
F5 sends response back to client for https://appname.domain.com/something/something/something/etc/etc/etc.html

If for some reason I did not understand this correctly can you provide additional information as to how it has to function?