<IfModule mod_rewrite.c>
    Options +FollowSymlinks
    RewriteEngine On

    # Block hidden directories
    RewriteRule "(^|/)." - [F]

    # Prevent /health_check.php from using https
    RewriteCond %{REQUEST_URI} !(health_check.php)$

    # Prevent /sns from using https but this DOES need codeigniter rewriting (see below)
    RewriteCond %{REQUEST_URI} !^/(sns)/

    # Reroute http to https
    RewriteCond %{HTTP:X-Forwarded-Proto} =http
    RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R,L]

    # Prevent rewriting of domain for codeigniter
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ ./index.php/$1 [L,QSA]

</IfModule>