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<html>
<head>
<title></title>
<script type="text/javascript">
function startCleanWorker() {
var worker = new Worker("clean.worker.js");
worker.onmessage = function(event) {
if (event.data == "success") {
window.parent.postMessage("success:blocked importScripts('evil.worker.js')", "*");
} else {
window.parent.postMessage("failure:failed to block importScripts('evil.worker.js')", "*");
}
window.parent.postMessage("finish", "*");
};
worker.onerror = function() {
window.parent.postmessage("failure:failed to load clean.worker.js", "*");
window.parent.postMessage("finish", "*");
};
worker.postMessage("");
}
function startEvilWorker() {
var worker = new Worker("evil.worker.js");
worker.onmessage = function() {
window.parent.postMessage("failure:failed to block evil.worker.js", "*");
startUnwantedWorker();
};
worker.onerror = function() {
window.parent.postMessage("success:blocked evil.worker.js", "*");
startUnwantedWorker();
};
worker.postMessage("");
}
function startUnwantedWorker() {
var worker = new Worker("unwanted.worker.js");
worker.onmessage = function() {
window.parent.postMessage("failure:failed to block unwanted.worker.js", "*");
startCleanWorker();
};
worker.onerror = function() {
window.parent.postMessage("success:blocked unwanted.worker.js", "*");
startCleanWorker();
};
worker.postMessage("");
}
</script>
</head>
<body onload="startEvilWorker()">
</body>
</html>
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