How to write a 301 redirect to https in htaccess?

Question

htaccess

Now I have a redirect from www to without www:

RewriteCond %{HTTP_HOST} .
RewriteCond %{HTTP_HOST} !^site\.ru [NC]
RewriteRule (.*) http://site.ru/$1 [R=301,L]

How to redirect to https? So that from www.site.ru redirect to https://site.ru .

Answer 1

RewriteCond %{HTTP_HOST} .
RewriteCond %{HTTP_HOST} !^site\.ru [NC]
RewriteCond %{REQUEST_SCHEME} http [NC]
RewriteRule (.*) https://site.ru/$1 [R=301,L]

Answer 2

And google not?

RewriteEngine On 
RewriteCond %{HTTPS} off 
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}