Redirect from www and http to https doesn't work on sub-domains

Question

I am trying to redirect all www and non-https requests to the HTTPS only versions with Apache server. I don't need or want www or non SSL URLs at all. The issue is that with the 2 different snippets below I only get correct http to https redirect but I can still get www to be accessible on sub-domains. The primary domain may only work as it is a Wordpress site and it does it's own redirects. What am I doing wrong here? Should I have ServerAlias with www version of the domain and sub-domains or just non-www ServerName?

#       RewriteCond %{SERVER_NAME} =example.com [OR]
#       RewriteCond %{SERVER_NAME} =*.example.com [OR]
#       RewriteCond %{SERVER_NAME} =www.example.com [OR]
#       RewriteCond %{SERVER_NAME} =www.*.example.com
#       RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,NE,R=permanent]

        RewriteEngine On
        RewriteCond %{HTTPS} off [OR]
        RewriteCond %{HTTP_HOST} ^www\. [NC]
        RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC]
        RewriteRule ^ https://%1%{REQUEST_URI} [L,NE,R=301]

Answer 1

I would implement it as two rule sets. First I would redirect any www URL then in a second rule I would redirect HTTP.

RewriteEngine On

RewriteCond %{HTTP_HOST} ^www\.(.*) [NC]
RewriteRule ^ https://%1%{REQUEST_URI} [L,NE,R=301]

RewriteCond %{HTTPS} off
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [END,NE,R=301]

No request should ever hit both rules. If it has a www it would be stripped and redirected to HTTPS. Otherwise if it has HTTP it will be redirected to HTTPS.

These rules need to be included in each and every virtual hosts file. If you have general rewrite rules outside a virtual host, they will work for all hosts unless that host has other rewrite rules. By default rewrite rules in a virtual host replace the global rules rather than add on to them.

If you did want global rewrite rules to work, you could put the rules outside a virtual host so that they apply globally with the InheritDown rewrite option in each virtual host that had its own other rules. (See How can I implement a global RewriteCond / RewriteRule in Apache that applies to all virtual hosts?.)