LTM Maintenance Page Lite

Hi,

I understand why there are some issues with this code... the code is not generic, it use some useless static configuration : pool name, http protocol...

Redirect must never include host and protocol if the target service is the same as current.

I changed the redirect and refresh URL to relative URL. the pool name is the one assigned to the tcp connection. I also change the refresh URL to previous URI and not /. this allow user to follow browsing and not go back to home page.

when RULE_INIT {
     sets the timer to return client to host URL
    set static::stime 10
}

when CLIENT_ACCEPTED { 
    set default_pool [LB::server pool]
}

when HTTP_REQUEST {
    Check if the URI is /maintenance
   switch [HTTP::uri] {
      "/maintenance" {

          Send an HTTP 200 response with a Javascript meta-refresh pointing to the host using a refresh time
         HTTP::respond 200 content \
"Maintenance page\
Sorry! This site is down for maintenance." "Content-Type" "text/html" 
         return
      }
   }
    If the default pool is down, redirect to the maintenance page
   if { [active_members $default_pool] < 1 } {
      HTTP::redirect "/maintenance"
      return
   }
}