Redirect ALL traffic to HTTPS, non-WWW, for multiple domains?

Hi there!

Much like with the WWW-redirects, you'll need one Application to map all your HTTP domains to, which will contain several redirect rules. The .htaccess of the redirect Application will contain two condition-based RewriteRules - one to handle requests from www-domains and one for non-www domains (http://example.com -> https://example.com AND http://www.example.com -> https://example.com):

RewriteEngine On

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

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

Note that if you would also like to redirect HTTPS requests from www-domains to their non-www versions (https://www.example.com -> https://example.com), you will need another redirection Application to handle all HTTPS requests to www-domains. It will have a different set of rules in its .htaccess file:

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

You would only map the www-versions of the domains to this HTTPS redirect Application, again if you wish to redirect HTTPS requests of www-domains to their non-www counterparts, which will of course be mapped to the actual Applications serving the appropriate content.

Finally, I would like to say that some CMS systems such as Wordpress, with which you can set the preferred URL parameter for a specific website will not require the additional redirect Application, since they provide permalink redirects of their own through PHP. Namely, if you have a Wordpress instance with its home and siteurl parameters set to the non-www version of the domain, Wordpress will perform the redirect after the HTTPS redirect takes place.