Getting the base path in a Slim middleware

I have a Slim 4 app and I'm trying to set up a middleware that redirects non https to https. So if I type

this_website.com

in the browser, this gets redirected automatically to https://this_website.com

I have an earlier website built with Slim 3 and I could use the following:

final class FullHttpsMiddleware {

    public function __invoke($request, $handler) {

        $response = $handler->handle($request);

        if($request->getUri()->getScheme() !== 'https' ){

            if($request->getUri()->getPath() != '/') {
                $response = $response->withStatus(302)->withHeader('Location', 'https://' . $request->getUri()->getHost() . $request->getUri()->getBasePath() . '/' . $request->getUri()->getPath() );
            } else {
                $response = $response->withStatus(302)->withHeader('Location', 'https://' . $request->getUri()->getHost() . $request->getUri()->getBasePath() );
            }
        }

        return $response;
    }
}

The problem is that $request->getUri()->getBasePath() doesn't exist in Slim 4. How can I change this code to work on Slim 4?

I wrote a blog post about this topic: Slim 4 - HTTPS Middleware

You could also use a .htaccess file to redirect the http traffic to https.

If you have existing code in your .htaccess, add the following:

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]