RewriteEngine on
RewriteCond %{REQUEST_URI} .*\.(txt|css¦png|jpg¦gif¦js|json|woff|ttf|svg)
RewriteRule ^ -

RewriteCond %{REQUEST_URI} !^/preview.php [NC]
RewriteRule ^(.*\.html)$ preview.php/$1 [L]

RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^(.*)$ preview.php/$1 [NC,L]
