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/* 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";
/* global ExtensionAPI, ExtensionCommon, ExtensionParent, Services, XPCOMUtils */
XPCOMUtils.defineLazyModuleGetters(this, {
Services: "resource://gre/modules/Services.jsm",
});
XPCOMUtils.defineLazyGlobalGetters(this, ["URL", "ChannelWrapper"]);
class Manager {
constructor() {
this._allowLists = new Map();
}
_ensureStarted() {
if (this._classifierObserver) {
return;
}
this._unblockedChannelIds = new Set();
this._channelClassifier = Cc[
"@mozilla.org/url-classifier/channel-classifier-service;1"
].getService(Ci.nsIChannelClassifierService);
this._classifierObserver = {};
this._classifierObserver.observe = (subject, topic, data) => {
switch (topic) {
case "http-on-stop-request": {
const { channelId } = subject.QueryInterface(Ci.nsIIdentChannel);
this._unblockedChannelIds.delete(channelId);
break;
}
case "urlclassifier-before-block-channel": {
const channel = subject.QueryInterface(
Ci.nsIUrlClassifierBlockedChannel
);
const { channelId, url } = channel;
let topHost;
try {
topHost = new URL(channel.topLevelUrl).hostname;
} catch (_) {
return;
}
for (const allowList of this._allowLists.values()) {
for (const entry of allowList.values()) {
const { matcher, hosts, notHosts } = entry;
if (matcher.matches(url)) {
if (
!notHosts?.has(topHost) &&
(hosts === true || hosts.has(topHost))
) {
this._unblockedChannelIds.add(channelId);
channel.unblock();
return;
}
}
}
}
break;
}
}
};
Services.obs.addObserver(this._classifierObserver, "http-on-stop-request");
this._channelClassifier.addListener(this._classifierObserver);
}
stop() {
if (!this._classifierObserver) {
return;
}
Services.obs.removeObserver(
this._classifierObserver,
"http-on-stop-request"
);
this._channelClassifier.removeListener(this._classifierObserver);
delete this._channelClassifier;
delete this._classifierObserver;
}
wasChannelIdUnblocked(channelId) {
return this._unblockedChannelIds.has(channelId);
}
allow(allowListId, patterns, { hosts, notHosts }) {
this._ensureStarted();
if (!this._allowLists.has(allowListId)) {
this._allowLists.set(allowListId, new Map());
}
const allowList = this._allowLists.get(allowListId);
for (const pattern of patterns) {
if (!allowList.has(pattern)) {
allowList.set(pattern, {
matcher: new MatchPattern(pattern),
});
}
const allowListPattern = allowList.get(pattern);
if (!hosts) {
allowListPattern.hosts = true;
} else {
if (!allowListPattern.hosts) {
allowListPattern.hosts = new Set();
}
for (const host of hosts) {
allowListPattern.hosts.add(host);
}
}
if (notHosts) {
if (!allowListPattern.notHosts) {
allowListPattern.notHosts = new Set();
}
for (const notHost of notHosts) {
allowListPattern.notHosts.add(notHost);
}
}
}
}
revoke(allowListId) {
this._allowLists.delete(allowListId);
}
}
var manager = new Manager();
function getChannelId(context, requestId) {
const wrapper = ChannelWrapper.getRegisteredChannel(
requestId,
context.extension.policy,
context.xulBrowser.frameLoader.remoteTab
);
return wrapper?.channel?.QueryInterface(Ci.nsIIdentChannel)?.channelId;
}
this.trackingProtection = class extends ExtensionAPI {
onShutdown(isAppShutdown) {
if (manager) {
manager.stop();
}
}
getAPI(context) {
return {
trackingProtection: {
async allow(allowListId, patterns, options) {
manager.allow(allowListId, patterns, options);
},
async revoke(allowListId) {
manager.revoke(allowListId);
},
async wasRequestUnblocked(requestId) {
if (!manager) {
return false;
}
const channelId = getChannelId(context, requestId);
if (!channelId) {
return false;
}
return manager.wasChannelIdUnblocked(channelId);
},
},
};
}
};
|
