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<!DOCTYPE html>
<html>
<head>
<title>User check</title>
<script type="text/javascript" defer>
const randomValue = "6436"; // Chosen by fair dice roll. Guaranteed to be random.
document.cookie = `session=${randomValue}; path=/; expires=${new Date(Date.now() + 24*3600*1000).toUTCString()}`;
const params = new Proxy(new URLSearchParams(window.location.search), {
get: (searchParams, prop) => searchParams.get(prop),
});
let path = params.to;
// Sanitize redirect path to avoid malicious arbitrary redirects
if (/^\/[-a-zA-Z0-9~_.?&=/+]*$/.test(path)) {
const current = new URL(window.location.toLocaleString());
window.location.href = current.origin + path;
} else {
window.onload = function() {
document.getElementById('error').innerHTML = 'Error! Bad redirect location!';
}
}
</script>
</head>
<body>
Redirecting back...
<br>
<p id="error"><!-- space for error message --></p>
</body>
</html>
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