how to use .htaccess to redirect all http traffic to https AND www.domain.com

Question

I've tried several solutions posted here, none of them seem to work - I just get redirect errors.

What I am trying to do is redirect all traffic to https for:

http://domain.com
http://www.domain.com
https://domain.com
http://alias.com
http://www.alias.com
https://alias.com

should all go to: https: // www.domain.com

currently addresses starting like: http: // www won't redirect to https.

here is the htaccess file

RewriteEngine On
RewriteBase /

# Fix Apache internal dummy connections from breaking [(site_url)] cache
RewriteCond %{HTTP_USER_AGENT} ^.*internal\ dummy\ connection.*$ [NC]
RewriteRule .* - [F,L]

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

# Exclude /assets and /manager directories from rewrite rules
RewriteRule ^(manager|assets) - [L]

# For Friendly URLs
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]

RewriteCond %{HTTP_HOST} ^myalias.ca$ [OR]
RewriteCond %{HTTP_HOST} ^www.myalias.ca$
RewriteRule ^/?$ "https\:\/\/mydomain\.com" [R=301,L]

RewriteCond %{HTTP_HOST} ^myotheralias.ca$ [OR]
RewriteCond %{HTTP_HOST} ^www.myotheralias.ca$
RewriteRule ^/?$ "https\:\/\/mydomain\.com" [R=301,L]

Answer 1

You should get rid of the www redirects at the bottom:

RewriteCond %{HTTP_HOST} ^myalias.ca$ [OR]
RewriteCond %{HTTP_HOST} ^www.myalias.ca$
RewriteRule ^/?$ "https\:\/\/mydomain\.com" [R=301,L]

RewriteCond %{HTTP_HOST} ^myotheralias.ca$ [OR]
RewriteCond %{HTTP_HOST} ^www.myotheralias.ca$
RewriteRule ^/?$ "https\:\/\/mydomain\.com" [R=301,L]

Don't need them, you just need a single redirect at the top, replace:

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

with

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

This should take care of all the redirects.