HTTPS and REST API with .htaccess - .htaccess

Question

Firstly I implemented a rewrite rule for my REST API on an apache2 server with the following .htaccess file:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-s
RewriteRule ^(.*)$ index.php?rquest=$1 [QSA,NC,L]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^(.*)$ index.php [QSA,NC,L]
RewriteCond %{REQUEST_FILENAME} -s
RewriteRule ^(.*)$ index.php [QSA,NC,L]
</IfModule>
It worked fine. If I entered e.g. http://mypage.de/REST/SomeRule/12 my index.php in the folder REST/ received the information SomeRule/12.
Now I enabled SSL on my server and I wanted to force the API to use https so I added the following code to my .htaccess file:
RewriteCond %{SERVER_PORT} !^443$
RewriteRule (.*) https://%{HTTP_HOST}/$1 [L]
Now I receive a page not found error. Can you see the error in the .htaccess file, or must it be somewhere else? I am not that familiar with these files. To create my API I used this tutorial.

Answer 1

With the help of anubhava I found the solution.
When I updated my server to run with https my folder sites-enabled included a new file sites-enabled/default-ssl. In this file I had to set
AllowOverride All
like I already did for the on using http. I addition the correct solution for the .htaccess file was the following:
<IfModule mod_rewrite.c>
RewriteEngine On
#use https
RewriteCond %{SERVER_PORT} !^443$
RewriteRule (.*) https://%{HTTP_HOST}/%{REQUEST_URI} [L]
#used for api
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-s
RewriteRule ^(.*)$ index.php?rquest=$1 [QSA,NC,L]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^(.*)$ index.php [QSA,NC,L]
RewriteCond %{REQUEST_FILENAME} -s
RewriteRule ^(.*)$ index.php [QSA,NC,L]
</IfModule>
I was not able to use
RewriteRule (.*) https://%{HTTP_HOST}/$1 [L]
because the $1 then was somehow overwritten for the next Rule.