Redirect to subfolder with htaccess - apache

Question

I'm trying to write a .htaccess-file that redirect requests of example.com or www.example.com to: https://example.com/game1
But I can't get it to work.
I have this in my .htaccess:
# ReDirect to current instance of game
RewriteEngine On
# RewriteCond %{HTTPS} != On
SetEnvIf PAGE_PATH "game1"
RewriteRule ^/?(.*) https://%{SERVER_NAME}/%{ENV:PAGE_PATH}/$1 [R,L]
The PAGE_PATH variable does not work and if I use setup2 apache changes the URL but the redirect fails and I can't call the correct URL either. I get error: example.com redirected you too many times (ERR_TOO_MANY_REDIRECTS).
Setup2 for .htaccess:
# ReDirect to current instance of game
RewriteEngine On
# RewriteCond %{HTTPS} != On
RewriteRule ^/?(.*) https://%{SERVER_NAME}/game1/ [R,L]
How can I configure my desired behavior?

Answer 1

You can use the following rule :
RewriteEngine on
RewriteCond %{HTTP_HOST} ^www\. [OR]
RewriteCond %{HTTPS} off
RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$
RewriteRule ^ https://%1/game1%{REQUEST_URI} [NE,L,R]
This will redirect :
example.com
or
www.example.com
to
https://example.com/game1/

Answer 2

Try this:
RewriteRule ^(?>/?)(?!game[1-9]\d*(?:$|/))(.*) https://%{SERVER_NAME}/%{ENV:PAGE_PATH}/$1 [R,L]
It will only redirect if the URL does not start with /gameN/ where N is any whole number. It first puts the slash in a once-only subpattern so, if matched, it cannot be "unmatched" by backtracking and break the next part. The next part is a negative look-ahead assertion.
Separate out the domain and https checks and place them before the game path redirect, since they should be permanent redirects whereas game should be temporary. You're better off hard-coding the domain in that check since SERVER_NAME is affected by UseCanonicalName which is off by default. Replace localhost with your dev server's domain.
RewriteCond %{HTTP_HOST} !^(?:localhost|example\.com)$
RewriteRule .* https://example.com/$0 [L,R=301]
RewriteCond %{HTTPS} ^off$
RewriteRule .* https//%{SERVER_NAME}/$0 [L,R=301]