World API avatar check

key avi = "a9ba2797-81af-429d-9833-51127ad5593c";
string api = "http://world.secondlife.com/resident/";
key reqID;

default
{
    state_entry()
    {
       reqID = llHTTPRequest(api+(string)avi,[HTTP_METHOD,"POST"],"check");
    }



   http_response(key request, integer status, list metadata, string body)
   {

       if(request == reqID)
       {

          integer title = llSubStringIndex(body,"<title>");     // only a valid uuid contains a <title> meta tag
                                                                // an invalid uuid contains an h3 metatag ie: <h3>Page Not Found</h3>

          if(title != -1)
          {

            llOwnerSay("UUID is an avatar!");

          }

          else
          llOwnerSay("UUID is invalid!");

        }
    }
}