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"use strict";
const BOUNDARY = "BOUNDARY";
// waitForPageShow should be false if this is for multipart/x-mixed-replace
// and it's not the last part, Gecko doesn't fire pageshow for those parts.
function documentString(waitForPageShow = true) {
return `<html>
<head>
<script>
bc.addEventListener("message", ({ data: { cmd, arg = undefined } }) => {
switch (cmd) {
case "load":
location.href = arg;
break;
case "replaceState":
history.replaceState({}, "Replaced state", arg);
bc.postMessage({ "historyLength": history.length, "location": location.href });
break;
case "back":
history.back();
break;
case "close":
close();
break;
}
});
function reply() {
bc.postMessage({ "historyLength": history.length, "location": location.href });
}
${waitForPageShow ? `addEventListener("pageshow", reply);` : "reply();"}
</script>
</head>
<body></body>
</html>
`;
}
function boundary(last = false) {
let b = `--${BOUNDARY}`;
if (last) {
b += "--";
}
return b + "\n";
}
function sendMultipart(response, last = false) {
setState("sendMore", "");
response.write(`Content-Type: text/html
${documentString(last)}
`);
response.write(boundary(last));
}
function shouldSendMore() {
return new Promise(resolve => {
let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
timer.initWithCallback(
() => {
let sendMore = getState("sendMore");
if (sendMore !== "") {
timer.cancel();
resolve(sendMore);
}
},
100,
Ci.nsITimer.TYPE_REPEATING_SLACK
);
});
}
async function handleRequest(request, response) {
if (request.queryString == "") {
// This is for non-multipart/x-mixed-replace loads.
response.write(documentString());
return;
}
if (request.queryString == "sendNextPart") {
setState("sendMore", "next");
return;
}
if (request.queryString == "sendLastPart") {
setState("sendMore", "last");
return;
}
response.processAsync();
response.setHeader(
"Content-Type",
`multipart/x-mixed-replace; boundary=${BOUNDARY}`,
false
);
response.setStatusLine(request.httpVersion, 200, "OK");
response.write(boundary());
sendMultipart(response);
while ((await shouldSendMore("sendMore")) !== "last") {
sendMultipart(response);
}
sendMultipart(response, true);
response.finish();
}