iRule to convert server side http response to https for a multi-vhost wild card ssl Sharepoint cluster

I have two VIPs for a sharepoint cluster: one port 80 and the other port 443. The port 80 VIP has no resources behind it, just a simple and very elegant irule that flips the request to https and, if anyone is stupid enough, strips www from their request:

when HTTP_REQUEST { if {([string tolower [HTTP::host]] starts_with "www.")} { HTTP::redirect "https://[string range [HTTP::host] 4 end][HTTP::uri]" return } elseif { [TCP::local_port] == 80 } { HTTP::redirect https://[HTTP::host][HTTP::uri] return } }

Works like a charm. The communication between the server and the f5 though is http so the server responds with http requests. This causes a problem for the sharepoint server with javascript and looks very confusing from the client-side as they are told to make an http request which forces another re-direct. I need to create an iRule for these vhosts on the port 443 VIP that re-writes the packet. Looking at the site I modified some suggestions to accomplish it but the f5 rejected it. I am new to iRules so I wasn't surprised. I wonder if anyone has some suggestions. Here was my attempt:

when HTTP_RESPONSE { HTTP::redirect https://[getfield [HTTP::host] ":" 1][HTTP::uri] }