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"use strict";
const REDIRECT_URI =
const DOWNGRADE_URI =
const RESPONSE_ERROR = "unexpected-query";
// An onload postmessage to window opener
const RESPONSE_HTTPS_SCHEME = `
<html>
<body>
<script type="application/javascript">
window.opener.postMessage({result: 'scheme-https'}, '*');
</script>
</body>
</html>`;
const RESPONSE_HTTP_SCHEME = `
<html>
<body>
<script type="application/javascript">
window.opener.postMessage({result: 'scheme-http'}, '*');
</script>
</body>
</html>`;
function handleRequest(request, response) {
response.setHeader("Cache-Control", "no-cache", false);
const query = request.queryString;
if (query == "downgrade") {
// send same-origin downgrade from https: to http: with a different path.
// we don't consider it's an endless upgrade downgrade loop in this case.
response.setStatusLine(request.httpVersion, 302, "Found");
response.setHeader("Location", DOWNGRADE_URI, false);
return;
}
// handle the redirect case
if ((query >= 301 && query <= 303) || query == 307) {
// send same-origin downgrade from https: to http: again simluating
// and endless upgrade downgrade loop.
response.setStatusLine(request.httpVersion, query, "Found");
response.setHeader("Location", REDIRECT_URI, false);
return;
}
// Check if scheme is http:// or https://
if (query == "verify") {
let response_content =
request.scheme === "https" ? RESPONSE_HTTPS_SCHEME : RESPONSE_HTTP_SCHEME;
response.setStatusLine(request.httpVersion, 200, "OK");
response.write(response_content);
return;
}
// We should never get here, but just in case ...
response.setStatusLine(request.httpVersion, 500, "OK");
response.write("unexepcted query");
}