Allowing specific files to run over https - regex

Question

I have SSL set up on the server, but I hardly use it for anything, therefore I am simply redirecting all https:// to http:// via .htaccess. Recently I have created small app for my Facebook Fan Page, but run into couple of problems, since Facebook does not allow http:// any longer.
Question:
How can I let one static HTML file to run with https:// leaving the rest of the set up as it is?
What I currently use in my .htaccess is the following
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTPS} on [OR]
RewriteCond %{HTTP:X-Forwarded-Proto} https [OR]
RewriteCond %{SERVER_PORT} ^443$
RewriteRule ^(.*)$ http://%{HTTP_HOST}%{REQUEST_URI} [L,R=301,NE]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^(.*)$ index.php/$1 [QSA,L,NC]
</IfModule>

Answer 1

Yes.
In your first block with all the conditions, add a condition so that your app will be excluded. For instance:
RewriteCond %{REQUEST_URI} !facebook-app\.html [OR]
For your_app_name, enter something specific that would only appear in the url for the App that you want to exclude from the rewrite. It does not matter if that name appears early or late in the url, just substitute it in the condition.