Disable stylesheet based on referrer

Question

I don't want to allow the stylesheet (hosted with me) to be loaded on a couple of domains.

This is what I'm trying, but doesn't work:

RewriteEngine on

RewriteCond %{HTTP_REFERER} ^http://example1.com/ [NC]
RewriteRule \.css$ http://www.mywebsite.com/dummy.css [R,L] 

RewriteCond %{HTTP_REFERER} ^http://example2.com/ [NC]
RewriteRule \.css$ http://www.mywebsite.com/dummy.css [R,L] 

How can I make it work?

Answer 1

css/.htaccess

Options +FollowSymLinks
RewriteEngine On

# Redirect requests to load.php
RewriteCond %{REQUEST_URI} .*\.css$ [NC]
RewriteRule .* load.php

css/load.php

$referrer = $_SERVER['HTTP_REFERER']; 

if (strpos($referrer, 'allowedwebsite1.com') !== false or 
    strpos($referrer, 'allowedwebsite2.com') !== false ) {

    header("Content-type: text/css", true);
    $css = file_get_contents("style.css");
    echo $css;
} 
else {
    header("Content-type: text/css", true);
    echo ''; // empty stylesheet
}