如何设置 .htaccess 以自动将网站翻译为 https？

向站点添加了 SSL 证书。现在有必要将通过 http: 对站点的任何请求自动转换为 https：

告诉我您需要如何更改此 .htaccess 以获得所需的行为：

AddDefaultCharset UTF-8
ErrorDocument 404 /index.php?page=404

RewriteEngine On

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

RewriteBase /    

# RewriteRule ^index.php$ / [R=301,L]

RewriteRule ^test/(x.+/)?$ index.php?page=test [L]
RewriteRule ^test/create/((de|es)/)?$ index.php?page=create&lang=$2 [L]
RewriteRule ^test/create/(([0-9A-Fa-f]+)/)?$ index.php?page=create&token=$2 [L]
RewriteRule ^test/([^/]+)/$ index.php?page=test&act=$1 [L]
RewriteRule ^test/replay/([0-9A-Za-z]+)/$ index.php?page=test&replay=$1 [L]

只需更改行：

RewriteRule ^(.*)$ http://www.somedomain.ru/$1 [R=301,L]

在：

RewriteRule ^(.*)$ https://www.somedomain.ru/$1 [R=301,L]

并非在所有情况下都提供所需的行为。

UPD：将 .htaccess 更新为@Alex 的回答中的选项 9：

AddDefaultCharset UTF-8
ErrorDocument 404 /index.php?page=404

RewriteEngine On

# https://masterhost.ru/support/doc/apache/#http2https

RewriteCond %{HTTP:PORT} !^443$
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

# https://masterhost.ru/support/doc/apache/#redirect

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

# старый вариант переадресации на www.
#RewriteCond %{HTTP_HOST} ^somedomain\.ru
#RewriteRule ^(.*)$ http://www.somedomain.ru/$1 [R=301,L]

RewriteBase /

# RewriteRule ^index.php$ / [R=301,L]

RewriteRule ^test/(x.+/)?$ index.php?page=test [L]
RewriteRule ^test/create/((de|es)/)?$ index.php?page=create&lang=$2 [L]
RewriteRule ^test/create/(([0-9A-Fa-f]+)/)?$ index.php?page=create&token=$2 [L]
RewriteRule ^test/([^/]+)/$ index.php?page=test&act=$1 [L]
RewriteRule ^test/replay/([0-9A-Za-z]+)/$ index.php?page=test&replay=$1 [L]

...有效。