/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
// stolen from file_blocked_script.sjs
function setGlobalState(key, data) {
const x = {
data,
QueryInterface: ChromeUtils.generateQI([]),
};
x.wrappedJSObject = x;
setObjectState(key, x);
}
function getGlobalState(key) {
let data;
getObjectState(key, function (x) {
data = x && x.wrappedJSObject.data;
});
return data;
}
function handleRequest(request, response) {
const second = request.queryString == "second";
const secondInContainer = request.queryString == "secondInContainer";
if (second || secondInContainer) {
// Initial request for document.
response.setStatusLine(request.httpVersion, 200, "OK");
response.setHeader("Cache-Control", "no-cache", false);
response.setHeader("Content-Type", "text/html", false);
response.write("");
response.write('first
');
if (secondInContainer) {
response.write("");
}
// Reference a slow script which will block parsing the rest of this
// document.
response.write('');
response.write('second
');
if (secondInContainer) {
response.write("");
}
return;
}
if (request.queryString == "script") {
// This is the request to load the slow, blocking script.
response.processAsync();
// Store the response in the global state.
setGlobalState("a11y-script-response", response);
const resolve = getGlobalState("a11y-script-resolve");
if (resolve) {
// Sometimes, the request to finish loading the script can arrive before
// the initial request to load the script, since they are requested from
// different processes. Notify the finish request that the initial request
// has been handled.
resolve();
}
return;
}
if (request.queryString == "scriptFinish") {
// This is the request to finish (unblock) the slow script.
response.processAsync();
const finish = () => {
response.setStatusLine(request.httpVersion, 200, "OK");
response.setHeader("Cache-Control", "no-cache", false);
response.setHeader("Content-Type", "application/json", false);
response.write("true"); // the payload doesn't matter.
response.finish();
const blockedResponse = getGlobalState("a11y-script-response");
blockedResponse.setStatusLine(request.httpVersion, 200, "OK");
blockedResponse.setHeader("Cache-Control", "no-cache", false);
blockedResponse.setHeader("Content-Type", "text/javascript", false);
blockedResponse.write(";"); // the payload doesn't matter.
blockedResponse.finish();
setGlobalState("a11y-script-response", undefined);
setGlobalState("a11y-script-resolve", undefined);
};
if (getGlobalState("a11y-script-response")) {
// The initial script request has already been handled.
finish();
} else {
// This finish request arrived before the initial request. Set up a
// Promise so we know when the initial request has been handled.
const promise = Promise.withResolvers();
promise.promise.then(finish);
setGlobalState("a11y-script-resolve", promise.resolve);
}
}
}