iRule to replace http:// ipaddress for https://fqdn

http://devcentral.f5.com/wiki/default.aspx/iRules/RewriteHTTPRedirectHostname.html

when HTTP_REQUEST {

    Save host name (use VS IP if no HTTP host header was found
   if {[HTTP::host] eq ""}{
      set host [IP::local_addr]
   } else {
      set host [HTTP::host]
   }
}
when HTTP_RESPONSE {

    Check if server response is a redirect
   if { [HTTP::header is_redirect]} {

       Log original and updated values
      log local0. "Original Location header value: [HTTP::header value Location],\
         updated: [string map -nocase "http:// https:// [IP::server_addr] $host" [HTTP::header value Location]]"

       Do the update, replacing http:// with https:// and the server IP with the host or VS IP
      HTTP::header replace Location [string map -nocase "http:// https:// [IP::server_addr] $host" [HTTP::header value Location]]
   }
}