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function handleRequest(request, response) {
if (request.queryString == "reset") {
setState("index", "0");
response.setStatusLine(request.httpVersion, 200, "Ok");
response.write("Reset");
return;
}
let refresh = "";
let index = Number(getState("index"));
// index == 0 First load, returns first meta refresh
// index == 1 Second load, caused by first meta refresh, returns second meta refresh
// index == 2 Third load, caused by second meta refresh, doesn't return a meta refresh
let query = new URLSearchParams(request.queryString);
if (index < 2) {
refresh = query.get("seconds");
if (query.get("crossOrigin") == "true") {
const hosts = ["example.org", "example.com"];
let url = `${request.scheme}://${hosts[index]}${request.path}?${request.queryString}`;
refresh += `; url=${url}`;
}
refresh = `<meta http-equiv="Refresh" content="${refresh}">`;
}
// We want to scroll for the first load, and check that the meta refreshes keep the same
// scroll position.
let scroll = index == 0 ? `scrollTo(0, ${query.get("scrollTo")});` : "";
setState("index", String(index + 1));
response.write(
`<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="Cache-Control" content="no-cache">
${refresh}
<script>
window.addEventListener("pageshow", () => {
${scroll}
window.top.opener.postMessage({
commandType: "pageShow",
commandData: {
inputValue: document.getElementById("input").value,
scrollPosition: window.scrollY,
},
}, "*");
});
window.addEventListener("message", ({ data }) => {
if (data == "changeInputValue") {
document.getElementById("input").value = "1234";
window.top.opener.postMessage({
commandType: "onChangedInputValue",
commandData: {
historyLength: history.length,
inputValue: document.getElementById("input").value,
},
}, "*");
} else if (data == "loadNext") {
location.href += "&loadnext=1";
} else if (data == "back") {
history.back();
}
});
</script>
</head>
<body>
<input type="text" id="input" value="initial"></input>
<div style='height: 9000px;'></div>
<p>
</p>
</body>
</html>`
);
}