Topic: Using external web page to determine rewrite condition

[Ropeguru]

I am looking for a way to put a rewrite condition into my configuration where I can poll an external web page and based on the http status code, allow the rewrite or not.

I am doing this in order to set a maintenance status on two different proxy servers, one is apache the other is a big-ip. I already have the maintenance pages and control setup on the big-ip, but I need a way to poll a url and pull a specific http status code served up by the big-ip.

I have tried searching but cannot find anything like I am looking for.

Thanks

[weyerma]

Try a condition:

RewriteCond %{HTTP:X-Maintenance} ^active$ [NC]
RewriteRule ^.*$ /system/maintenance.html [L]

(If Header X-Maintenance has value "active")

[Ropeguru]

So how do I write the portion that actually checks for the header from a page on a different server?

I understand the concept of the rewrite condition you proposed.

[weyerma]

Ah.. .ok i dont realized the check from a different server..

So you can run a external script with curl, which place a file anywhere and check for it with a condition:

RewriteCond /var/www/filename.xxx -f