Redirects to user to the given URL.
Source
redirect(String url, {int code: 301}) {
header(HttpHeaders.LOCATION, url);
status(code ?? 301);
write('''
<!DOCTYPE html>
<html>
<head>
<title>Redirecting...</title>
<meta http-equiv="refresh" content="0; url=$url">
</head>
<body>
<h1>Currently redirecting you...</h1>
<br />
Click <a href="$url"></a> if you are not automatically redirected...
<script>
window.location = "$url";
</script>
</body>
</html>
''');
end();
}