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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 */
// eslint-disable-next-line mozilla/reject-importGlobalProperties
XPCOMUtils.defineLazyGlobalGetters(this, ["URL", "ChannelWrapper"]);
class AllowList {
constructor(id) {
this._id = id;
}
setShims(patterns, notHosts) {
this._shimPatterns = patterns;
this._shimMatcher = new MatchPatternSet(patterns || []);
this._shimNotHosts = notHosts || [];
return this;
}
setAllows(patterns, hosts) {
this._allowPatterns = patterns;
this._allowMatcher = new MatchPatternSet(patterns || []);
this._allowHosts = hosts || [];
return this;
}
shims(url, topHost) {
return (
this._shimMatcher?.matches(url) && !this._shimNotHosts?.includes(topHost)
);
}
allows(url, topHost) {
return (
this._allowMatcher?.matches(url) && this._allowHosts?.includes(topHost)
);
}
}
class Manager {
constructor() {
this._allowLists = new Map();
}
_getAllowList(id) {
if (!this._allowLists.has(id)) {
this._allowLists.set(id, new AllowList(id));
}
return this._allowLists.get(id);
}
_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;
}
// If anti-tracking webcompat is disabled, we only permit replacing
// channels, not fully unblocking them.
if (Manager.ENABLE_WEBCOMPAT) {
// if any allowlist unblocks the request entirely, we allow it
for (const allowList of this._allowLists.values()) {
if (allowList.allows(url, topHost)) {
this._unblockedChannelIds.add(channelId);
channel.allow();
return;
}
}
}
// otherwise, if any allowlist shims the request we say it's replaced
for (const allowList of this._allowLists.values()) {
if (allowList.shims(url, topHost)) {
this._unblockedChannelIds.add(channelId);
channel.replace();
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) {
this._ensureStarted();
this._getAllowList(allowListId).setAllows(patterns, hosts);
}
shim(allowListId, patterns, notHosts) {
this._ensureStarted();
this._getAllowList(allowListId).setShims(patterns, notHosts);
}
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;
}
var dFPIPrefName = "network.cookie.cookieBehavior";
var dFPIPbPrefName = "network.cookie.cookieBehavior.pbmode";
var dFPIStatus;
function updateDFPIStatus() {
dFPIStatus = {
nonPbMode: 5 == Services.prefs.getIntPref(dFPIPrefName),
pbMode: 5 == Services.prefs.getIntPref(dFPIPbPrefName),
};
}
this.trackingProtection = class extends ExtensionAPI {
onShutdown(isAppShutdown) {
if (manager) {
manager.stop();
}
Services.prefs.removeObserver(dFPIPrefName, updateDFPIStatus);
Services.prefs.removeObserver(dFPIPbPrefName, updateDFPIStatus);
}
getAPI(context) {
Services.prefs.addObserver(dFPIPrefName, updateDFPIStatus);
Services.prefs.addObserver(dFPIPbPrefName, updateDFPIStatus);
updateDFPIStatus();
return {
trackingProtection: {
async shim(allowListId, patterns, notHosts) {
manager.shim(allowListId, patterns, notHosts);
},
async allow(allowListId, patterns, hosts) {
manager.allow(allowListId, patterns, hosts);
},
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);
},
async isDFPIActive(isPrivate) {
if (isPrivate) {
return dFPIStatus.pbMode;
}
return dFPIStatus.nonPbMode;
},
},
};
}
};
XPCOMUtils.defineLazyPreferenceGetter(
Manager,
"ENABLE_WEBCOMPAT",
"privacy.antitracking.enableWebcompat",
false
);
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