Bypass landing page based upon cookie (Apache Users)

All,

Apache 2.4.27

OS: RHEL 7.6

We're using httpd as a reverse proxy to 3 back end application servers. We have a landing page for users to select their geographical region. Everything works as expected with the current setup, however, we'd like users to not have to re-select their region on return visits.

So, ideally we set a cookie (or two) and use mod_rewrite to direct requests that have the cookie(s) in place.

I have not been able to get this working as I am not that familiar with what I need to be redirecting on. I'm assuming I need to do something like:

RewriteEngine ON

RewriteCond %{HTTP_COOKIE} region=us [NC]

RewriteRule "/index.html" "/CA/en_US"

I added this inside of the landing page directory block, but is just sent the request into a redirect loop. Here is the whole virtualhost block:

ServerName example.com

SSLEngine on

SSLProxyEngine on

SSLProtocol all -SSLv2 -SSLv3 -TLSv1 -TLSv1.1

SSLCipherSuite EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH

SSLHonorCipherOrder On

SSLCompression off

SSLUseStapling on

SSLSessionTickets Off

SSLCertificateFile /etc/pki/tls/certs/server.crt

SSLCertificateKeyFile /etc/pki/tls/certs/server.key

Header always set Strict-Transport-Security "max-age=63072000; includeSubDomains"

Header always set X-Frame-Options DENY

Header always set X-Content-Type-Options nosniff

Header add Set-Cookie "ROUTEID=.%{BALANCER_WORKER_ROUTE}e; path=/" env=BALANCER_ROUTE_CHANGED

Alias "/balancermanager" /var/www/html/balancermanager

SetHandler balancer-manager

Order Deny,Allow

Deny from all

Allow from 10.1.1.10

</Location>

DocumentRoot /var/www/html/home

FallbackResource /index.html

Require all granted

AddType text/html html

AddType text/css css

AddType image/svg+xml svg

AddType image/jpeg jpeg jpg jpe png

</Directory>

BalancerMember https://node1.example.com:8443 route=node1 keepalive=On ping=3 ttl=60

BalancerMember https://node2.example.com:8443 route=node2 keepalive=On ping=3 ttl=60

BalancerMember https://node3.example.com:8443 route=node3 keepalive=On ping=3 ttl=60

ProxySet lbmethod=bybusyness

</Proxy>

ProxyRequests Off

ProxyPreserveHost On

ProxyPassMatch .*\.php$ !

ProxyPassMatch .*\.asp$ !

ProxyPassMatch .*\.pl$ !

ProxyPassMatch .*\.pm$ !

ProxyPassMatch .*\.rb$ !

ProxyPassMatch .*\.py$ !

ProxyPass /balancermanager !

Alias "/favicon.ico" /var/www/html/home/favicon.ico

ProxyPass "/US/en_US/" balancer://balancer_nodes/US/en_US/ stickysession=ROUTEID

ProxyPassReverse "/US/en_US/" balancer://balancer_nodes/US/en_US/ stickysession=ROUTEID

ProxyPass "/CA/en_CA/" balancer://balancer_nodes/CA/en_CA/ stickysession=ROUTEID

ProxyPassReverse "/CA/en_CA/" balancer://balancer_nodes/CA/en_CA/ stickysession=ROUTEID

</VirtualHost>

Any guidance is greatly appreciated.

Thanks,