I have two vhosts in one server thats using apache – my main page is www.alleOne.com and the other is www.sch2.com. I have a custom page that if www.sch2.com or any other uri page in www.sch2.com/madeup is down a 503 error code, it should redirect to my custom page http://www.alleOne.com/corp/en/service-unavailable.html. This page has a timer and will redirect in 5 seconds to www.alleOne.com ( This part works already). I am trying to see if what I wrote below is correct? Also in the rewrites-enabled were would I add my rules under what vhost www.alleOne.com or www.sch2.com?
RewriteCond %{ENV:REDIRECT_STATUS} !=503
RewriteRule !^www.sch2.com$ http://www.alleOne.com/corp/en/service-unavailable.html [L,R=503]
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Answer
You can’t do this with mod_rewrite. Rewrite rules are used to modify requests, you want to modify the response (redirect based on the status). You can use ErrorDocument directive for your purpose.
In www.sch2.com configuration, use
ErrorDocument 503 http://www.alleOne.com/corp/en/service-unavailable.html
More information: ErrorDocument Directive