Redirect all http AND https non-www URLS to https://www.xyz.com via htaccess

This is very much possible. use the following code. this works for me.

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

In case anyone from the future (HELLO PEOPLE OF THE FUTURE) stumble across this, I asked the same question and had it answered over at Server Fault.

Short version: impossible.

Long version: https://serverfault.com/questions/523199/redirect-all-http-and-https-non-www-urls-to-https-www-example-com-via-htaccess

Even though this issue is very old.

If found it googeling the exact same issue. After the Code provided here didn't help. I tried and tried.

This one worked for me:

     RewriteCond %{HTTPS} off
     RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
     RewriteRule .* https://%1%{REQUEST_URI} [R=301,L]
     RewriteCond %{HTTPS} off
     RewriteCond %{HTTP_HOST} !^www\. [NC]
     RewriteRule .* https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
     RewriteCond %{HTTPS} on
     RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
     RewriteRule .* https://%1%{REQUEST_URI} [R=301,L]

Fixed the issue for me without any Loops or other errors. Maybe it will help someone else.