reverse-proxy.php

<?php
if ( !file_exists( "proxy" ) ) {
	$filename = "sample.mp3";
	file_put_contents( "proxy", "false" );
	header( "Cache-Control: no-store, no-cache, must-revalidate, max-age=0" );
	header( "Cache-Control: post-check=0, pre-check=0", false);
	header( "Pragma: no-cache" );
	header('Content-Type: audio/mpeg');
    header('Content-Disposition: inline;filename="test.mp3"');
    header('Content-length: '.filesize($filename));
    header('Cache-Control: no-cache');
    header("Content-Transfer-Encoding: binary");
    readfile($filename);
}
?>