How to edit htaccess to redirect all trafic to secure www domain - apache

Question

How to achieve the following:
redirect all http:// domain .com to https:// www.domain .com
redirect all http:// www.domain .com to https:// www.domain .com
redirect all https:// domain .com to https:// www.domain .com
So basically, all my traffic be it non-www or www will be redirected to SSL www domain.
Edit:
Additionally, I have 2 subdomain that works on http, so I want to achieve the above and also keep the 2 subdomain free from the above redirect rule.

Answer 1

You can use the following code in Root/.htaccess :
RewriteEngine on
#Http to https
#Exclude subdomains
RewriteCond %{HTTP_HOST} !^(sub1|sub2)
RewriteCond %{HTTP_HOST} ^(www\.)?example.com$ [NC]
RewriteCond %{HTTPS} off
RewriteRule ^ https://www.example.com%{REQUEST_URI} [NC,L,R]
#add www on ssl
RewriteCond %{HTTPS} on
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^ https://www.%{HTTP_HOST}%{REQUEST_URI} [NC,L,R]
This will redirect :
http://example.com
or
http://www.example.com
to ssl
https://www.example.com
And the second rule will add www to non www requests on ssl, redirect :
https://example.com
to
https://www.example.com

Answer 2

First, you can edit your httpd.conf file, and add this to the :80 servers
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_HOST} ^domain.com$ [NC]
RewriteRule ^(.*)$ https://www.domain.com$1 [L,R=301]
</IfModule>
Anyway , this on .htaccess will do the same
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www.domain\.com [NC]
RewriteCond %{HTTP_HOST} !^$
RewriteRule ^/?(.*) https://www.domain.com/$1 [L,R,NE]
Also, you can add in your vhost file also something like
Redirect permanent / https://www.domain.com/
And in your vhost_ssl:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_HOST} ^domain.com$ [NC]
RewriteRule ^(.*)$ https://www.domain.com$1 [L,R=301]
</IfModule>