HTTPS to HTTP rewrite rules not working as expected

Question

I'm struggling at getting these rewrite rules to work and was wondering if someone can point out my error(s).

The following should redirect a user to HTTPS if they are at the login page or in the admin dashboard. If they go anywhere else on the site, it should go back to HTTP.

# Redirect users to HTTPS when at the Login page or the Admin dashboard
RewriteEngine On
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^\/Blog\/(wp-login.php) https://%{HTTP_HOST}/Blog/$1 [NC,R=301,L]
RewriteRule ^\/Blog\/wp-admin\/(.*) https://%{HTTP_HOST}/Blog/wp-admin/$1 [NC,R=301,L]

# Redirect users to HTTP when not at the Login page or Admin Dashboard
# Avoid loading mixed http/https content by excluding /wp-content/* and /wp-includes/*
RewriteEngine On
RewriteCond %{SERVER_PORT} !^80$
RewriteRule !^\/Blog\/(wp-login.php|wp-admin\/(.*)|wp-content\/(.*)|wp-includes\/(.*)) http://%{HTTP_HOST}/$1 [NC,R=301,L]

I'm a noob at this, so not sure if the above is correct. It seems to be working except in two scenarios:

1. If I go to any page or post on my website as https instead of http, I get redirected to the main home page. For example: visit https://example.com/about and I end up at http://example.com instead of http://example.com/about
2. The Media Library of my admin dashboard loads over https, but does not show a padlock. I believe because it is accessing content at /wp-content/uploads over HTTP instead of HTTPS.

Just in case this is the problem, I also have these rewrite rules defined after the ones above:

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

Thanks in advance for any help you can provide.

Answer 1

The SSL admin and login redirection should be done through the FORCE_SSL_ADMIN constant in wp-config.php:

 define('FORCE_SSL_ADMIN', true);

For further information: Administration Over SSL

Aditionally, if you want be redirected to http when you're logged and in the frontend, take a look at:

Redirect WordPress front end https URLs to http without a plugin