RewriteEngine On
RewriteBase /
RewriteCond %{HTTPS} off
RewriteCond %{REQUEST_URI} !^/index.html$
RewriteCond %{REQUEST_URI} !^.*\.(gif|jpg|jpeg|png|swf|css|js)$ [NC]
RewriteRule ^(.*)$ http://exmaple.com/index.html [L,R]
RewriteCond %{HTTPS} on
RewriteRule ^(.*)$ http://exmaple.com/index.html [L,R]
どのページへのアクセスも、HTTP/HTTPS問わず「http://exmaple.com/index.html 」にリダイレクトされます。