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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<!-- Use doc.write() to apply meta csp -->
<script type="application/javascript">
var metaCSP = "style-src 'none'; script-src 'none'; img-src 'none'";
document.write("<meta http-equiv=\"Content-Security-Policy\" content=\" " + metaCSP + "\">");
</script>
<!-- try to load a css which is forbidden by meta CSP -->
<link rel="stylesheet" type="text/css" href="file_docwrite_meta.css">
<!-- try to load a script which is forbidden by meta CSP -->
<script id="testscript" src="file_docwrite_meta.js"></script>
</head>
<body>
<!-- try to load an image which is forbidden by meta CSP -->
</body>
</html>