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<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Security-Policy" content="{{GET[csp]}}">
</head>
<body>
<span id="escape">{{GET[url]}}</span>
<script nonce='abc'>
window.addEventListener('securitypolicyviolation', function(e) {
opener.postMessage('fail', '*');
});
window.location.href = document.getElementById("escape").textContent;
</script>
</body>
</html>