Issue
I have a domainA.com which I would like to redirect it to:
domainB.com/public.php?service=shorty_relay&id=$1
So the input on the browser should be domainA.com/f7g6f87g and it should make a background redirection to domainB.com/public.php?service=shorty_relay&id=f7g6f87g, but keep the domain on the browser as is.
My virtual host lines are:
<VirtualHost *:80>
ServerAdmin [email protected]
DocumentRoot /var/www/dir
ServerName domainA.com
ServerAlias www.domainA.com
ProxyPass / https://domainB.com/public.php?service=shorty_relay&id=$1
ProxyPassMatch ^/([A-Za-z0-9]{4,12})$ https://domainB.com/public.php?service=shorty_relay&id=$1
ProxyPassReverse / https://domainB.com/public.php?service=shorty_relay&id=$1
ErrorLog /var/www/dir/error.log
</VirtualHost>
With the current lines Im able to redirect the domainA.com to the root of domainB.com. But its not what I need. I need the domainA.com to accept only valid ids (?service=shorty_relay&id=$1) I know somehow I have to combine this regex so I can allow only valid id.
ProxyPassMatch ^/([A-Za-z0-9]{4,12})$ https://domainB.com/public.php?service=shorty_relay&id=$1
Any clues how can I make this possible. Im trying to figure this out days now but no luck.
Solution
Get rid of the ProxyPass line. That line works similar to the Redirect directive of mod_alias. It means anything after the / automatically gets appended to the end of the target URL, excluding query strings. That means $1 has no bearing in this directive because you're not using a regular expression to capture a match.
The only thing you should need is your ProxyPassMatch line:
ProxyPassMatch ^/([A-Za-z0-9]{4,12})$ https://domainB.com/public.php?service=shorty_relay&id=$1
Additionally, you don't need to include the query string in the ProxyPassReverse. This directive is used to "reverse" map redirects sent from domainB.com to a matching URL in domainA.com. So this should be enough:
ProxyPassReverse / https://domainB.com/public.php
Answered By - Jon Lin Answer Checked By - Pedro (WPSolving Volunteer)