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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>about:blank Network Partition Checker</title>
<meta name="timeout" content="normal">
</head>
<body>
<script>
async function fetch_and_reply() {
// Load about:blank in a new tab, and inject the network partition checking code into it.
var win;
try {
win = window.open();
var url = 'SUBRESOURCE_PREFIX:&dispatch=fetch_file&path=fetch/connection-pool/resources/network-partition-checker.html&sandbox=true';
var response = await fetch(url, {credentials: 'omit', mode: 'cors'});
win.document.write(await response.text());
} catch (e) {
win.close();
window.parent.postMessage({result: 'error', details: e.message}, '*');
return;
}
// Listen for first message from the new window and pass it back to the parent.
function message_listener(event) {
window.parent.postMessage(event.data, '*');
win.close();
}
window.addEventListener('message', message_listener, {once: true});
}
fetch_and_reply();
</script>
</body>
</html>