htaccess重定向https：// www。 （https://www.example.com）到非www（https://example.com）

Question

I'm trying to redirect all requests from http to https and all requests from www. to non www (https://) but no matter what i try it is not working. Specifically the redirect from https://www.example.com to https://example.com is not working. Everything else works fine. I've tried many different ways i found here on stackoverflow and other posts on the internet but none of them are working for me. When i go to https://www.example.com i get a certificate warning cause the certificate is issued to https://example.com . I'm really giving up on this one as i've tried it for two days now ...

Maybe i'm doing something completely wrong or it is something else i forgot. Help is much appreciated, thank you.

This is the code i'm using right now

RewriteEngine on
# www -> https without www
RewriteCond %{HTTP_HOST} ^www\.(.+) [NC]
RewriteRule ^ https://%1%{REQUEST_URI} [NE,L,R=301]
# http -> https
RewriteCond %{HTTPS} off
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [NE,L,R=301]

Cheers

Answer 1

Arkascha had the right answer so i'm quoting his comment:

Request rewriting cannot somehow magically get you around the client side certificate validation. The initial requests goes to www.example.com. If the client cannot validate the specified certificate for that request it issues an error to the user. There is no way around that. You either need an additional certificate for that host or a wildcard certificate.