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<html><body>
<iframe id="frame" sandbox="allow-scripts allow-popups"></iframe>
<script type="application/javascript">
onmessage = function(e) {
parent.postMessage(e.data, '*');
}
var ifr = document.getElementById('frame');
if (location.search == '?nested') {
var url = new URL(location);
url.search = "";
ifr.src = url.href;
} else if (location.search == '?popup') {
var url = new URL(location);
url.search = "?opener";
ifr.srcdoc = "<html><script>" +
"window.open('" + url.href + "', 'foobar');" +
"onmessage = function(e) { " +
" parent.postMessage(e.data, '*'); " +
"}" +
"</scr" + "ipt></html>";
} else if (location.search == '?opener') {
try{
socket.onerror = function(e) {
opener.postMessage('WS onerror', '*');
close();
};
socket.onopen = function(event) {
opener.postMessage('WS onopen', '*');
close();
};
} catch(e) {
if (e.name == 'SecurityError') {
opener.postMessage('WS Throws!', '*');
} else {
opener.postMessage('WS Throws something else!', '*');
}
close();
}
} else {
ifr.srcdoc = `
<html><script>
try{
socket.onerror = function(e) {
parent.postMessage('WS onerror', '*');
};
socket.onopen = function(event) {
parent.postMessage('WS onopen', '*');
};
} catch(e) {
if (e.name == 'SecurityError') {
parent.postMessage('WS Throws!', '*');
} else {
parent.postMessage('WS Throws something else!', '*');
}
}
</scr`+`ipt>
</html>`;
}
</script>
</body></html>