.htaccess WildCard SSL for sub-domain

Question

I setup .htaccess file for my domain and sub-domain. If I write manually https then both working fine but I want to force so that no one can open without https.

Also I want WWW with my main domain and Sub-domain without WWW. Below is my .htaccess code,

RewriteEngine On 
RewriteCond %{HTTP_HOST} ^app.domain.com$ 
RewriteCond %{REQUEST_URI} !^/app/ 
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteRule ^(.*)$ /app/$1 
RewriteCond %{HTTP_HOST} ^app.domain.com$ 
RewriteRule ^(/)?$ app/index.php [L]

And Is it possible to redirect user to sub-domain if they type www.domain.com/app/

Answer 1

You can insert these 2 rules:

RewriteEngine On

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

# force www for main site
RewriteCond %{HTTP_HOST} ^domain\.com$ [NC]
RewriteRule ^ https://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L,NE]

# remove www for app site
RewriteCond %{HTTP_HOST} ^www\.(app\.domain\.com)$ [NC]
RewriteRule ^ https://%1%{REQUEST_URI} [R=301,L,NE]

RewriteCond %{THE_REQUEST} \s/+app[/\s] [NC]
RewriteRule ^ / [R=301,L]

RewriteCond %{HTTP_HOST} ^app.domain.com$ 
RewriteCond %{REQUEST_URI} !^/app/ 
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteRule ^(.*)$ /app/$1 
RewriteCond %{HTTP_HOST} ^app.domain.com$ 
RewriteRule ^(/)?$ app/index.php [L]