file_meta_element.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <meta http-equiv="Content-Security-Policy"

        content= "img-src 'none'; script-src 'unsafe-inline'; report-uri http://www.example.com; frame-ancestors https:; sandbox allow-scripts">

  <title>Bug 663570 - Implement Content Security Policy via meta tag</title>

</head>

<body>

  <!-- try to load an image which is forbidden by meta CSP -->

  <img id="testimage"></img>

  <script type="application/javascript">

    var myImg = document.getElementById("testimage");

    myImg.onload = function(e) {

      window.parent.postMessage({result: "img-loaded"}, "*");

};

    myImg.onerror = function(e) {

      window.parent.postMessage({result: "img-blocked"}, "*");

};

    //Image should be tried to load only after onload/onerror event declaration.

    myImg.src = "http://mochi.test:8888/tests/image/test/mochitest/blue.png";

  </script>

</body>

</html>