Big Redirects List

So, I've built two lists, a redirects, and a search list.. I'm asking find the pair based on the host address from the myRedirects list, then redirect, else (if the length of newdom is less than or equal to 1) find the third field of the host name (Based on the .) and find it in mySearchs lists then redirect to somesite in that list, else do a base redirect to a global search page.

Does this look right?

class myRedirects {
  "site1.site.com site1a.site.com"
  "site2.site.com site2.othersite.com"
  "site3.othersite.com site1.site.com"
  "site4.site.com site5.othersite.com\boo.asp"
  "site3.site.com site5.othersite.com\woo.asp"
}
class mySearchs {
   "uk site.co.uk/search.asp"
   "jp site.co.jp/search.asp"
   "tw site.com.tw/search.asp"
}
when HTTP_REQUEST {
  set newDom [findclass [HTTP::host] $::myRedirects " "]
  if { [string length $newDom] >= 1} {
    HTTP::redirect $newDom
  } else {
  set myCatch [findclass [getfield HTTP::host] "." 3] $::MySearchs " "]
    if { [string length $myCatch] >= 1} {
     HTTP::redirect $myCatch
  } else {
     HTTP:redirect "http://mysearch.com"
  }
  }
}

Oh, and another condition, since I've got a healthy ammount of www. CNAMEs, I'd like to exlude them from the list and just pick up the relivant part behind it..

when someone types in www.site1.site.com and it's CNAME'd the host still shows as www.site1.site.com and wouldn't match in this scenario, yes? How do I get around that? Woudl 'ends_with' be applicable in this 'host' scenario?