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chromium/third_party/blink/web_tests/http/tests/inspector-protocol/network/resources/redirect-cached-target.php 

<?php
    header("Cache-control: max-age=360000");
    header("Content-Type: text/html; charset=UTF-8");
?>
<html>
<body>
Today's lucky number: <?php echo(rand()) ?>
</body>
</body>