mirror of
https://github.com/gorhill/uBlock.git
synced 2024-09-29 22:27:12 +02:00
cf2c638d8e
All matching `redirect-rule` directives will now be reported in the logger, instead of just the effective one. The highest-ranked redirect directive will be the one effectively used for redirection. This way filter list authors can see whether a lower priority redirect is being overriden by a higher priority one. The default priority has been changed to 10, so as to allow more leeway to create lower ranked redirect directives. Additonally, rendering of redirect directives with explicit priority has been fixed in the logger, they will no longer be rendered as unknown redirect tokens.
936 lines
30 KiB
JavaScript
936 lines
30 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2014-present Raymond Hill
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see {http://www.gnu.org/licenses/}.
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Home: https://github.com/gorhill/uBlock
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*/
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'use strict';
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/*******************************************************************************
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A PageRequestStore object is used to store net requests in two ways:
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To record distinct net requests
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To create a log of net requests
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**/
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{
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// start of private namespace
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// >>>>>
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/******************************************************************************/
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const µb = µBlock;
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/******************************************************************************/
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const NetFilteringResultCache = class {
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constructor() {
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this.init();
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}
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init() {
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this.blocked = new Map();
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this.results = new Map();
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this.hash = 0;
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this.timer = undefined;
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return this;
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}
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// https://github.com/gorhill/uBlock/issues/3619
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// Don't collapse redirected resources
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rememberResult(fctxt, result) {
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if ( fctxt.tabId <= 0 ) { return; }
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if ( this.results.size === 0 ) {
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this.pruneAsync();
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}
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const key = `${fctxt.getDocHostname()} ${fctxt.type} ${fctxt.url}`;
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this.results.set(key, {
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result,
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redirectURL: fctxt.redirectURL,
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logData: fctxt.filter,
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tstamp: Date.now()
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});
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if ( result !== 1 || fctxt.redirectURL !== undefined ) { return; }
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const now = Date.now();
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this.blocked.set(key, now);
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this.hash = now;
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}
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rememberBlock(fctxt) {
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if ( fctxt.tabId <= 0 ) { return; }
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if ( this.blocked.size === 0 ) {
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this.pruneAsync();
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}
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if ( fctxt.redirectURL !== undefined ) { return; }
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const now = Date.now();
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this.blocked.set(
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`${fctxt.getDocHostname()} ${fctxt.type} ${fctxt.url}`,
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now
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);
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this.hash = now;
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}
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forgetResult(docHostname, type, url) {
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const key = `${docHostname} ${type} ${url}`;
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this.results.delete(key);
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this.blocked.delete(key);
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}
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empty() {
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this.blocked.clear();
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this.results.clear();
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this.hash = 0;
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if ( this.timer !== undefined ) {
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clearTimeout(this.timer);
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this.timer = undefined;
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}
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}
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prune() {
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const obsolete = Date.now() - this.shelfLife;
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for ( const entry of this.blocked ) {
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if ( entry[1] <= obsolete ) {
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this.results.delete(entry[0]);
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this.blocked.delete(entry[0]);
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}
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}
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for ( const entry of this.results ) {
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if ( entry[1].tstamp <= obsolete ) {
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this.results.delete(entry[0]);
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}
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}
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if ( this.blocked.size !== 0 || this.results.size !== 0 ) {
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this.pruneAsync();
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}
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}
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pruneAsync() {
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if ( this.timer !== undefined ) { return; }
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this.timer = vAPI.setTimeout(
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( ) => {
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this.timer = undefined;
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this.prune();
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},
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this.shelfLife
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);
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}
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lookupResult(fctxt) {
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const entry = this.results.get(
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fctxt.getDocHostname() + ' ' +
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fctxt.type + ' ' +
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fctxt.url
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);
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if ( entry === undefined ) { return; }
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// We need to use a new WAR secret if one is present since WAR secrets
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// can only be used once.
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if (
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entry.redirectURL !== undefined &&
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entry.redirectURL.startsWith(this.extensionOriginURL)
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) {
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const redirectURL = new URL(entry.redirectURL);
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redirectURL.searchParams.set('secret', vAPI.warSecret());
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entry.redirectURL = redirectURL.href;
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}
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return entry;
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}
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lookupAllBlocked(hostname) {
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const result = [];
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for ( const entry of this.blocked ) {
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const pos = entry[0].indexOf(' ');
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if ( entry[0].slice(0, pos) === hostname ) {
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result[result.length] = entry[0].slice(pos + 1);
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}
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}
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return result;
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}
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static factory() {
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return new NetFilteringResultCache();
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}
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};
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NetFilteringResultCache.prototype.shelfLife = 15000;
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NetFilteringResultCache.prototype.extensionOriginURL = vAPI.getURL('/');
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/******************************************************************************/
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// Frame stores are used solely to associate a URL with a frame id.
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// To mitigate memory churning
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const frameStoreJunkyard = [];
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const frameStoreJunkyardMax = 50;
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const FrameStore = class {
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constructor(frameURL) {
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this.init(frameURL);
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}
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init(frameURL) {
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this.t0 = Date.now();
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this.exceptCname = undefined;
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this.clickToLoad = false;
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this.rawURL = frameURL;
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if ( frameURL !== undefined ) {
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this.hostname = vAPI.hostnameFromURI(frameURL);
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this.domain =
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vAPI.domainFromHostname(this.hostname) || this.hostname;
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}
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return this;
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}
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dispose() {
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this.exceptCname = undefined;
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this.rawURL = this.hostname = this.domain = '';
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if ( frameStoreJunkyard.length < frameStoreJunkyardMax ) {
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frameStoreJunkyard.push(this);
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}
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return null;
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}
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static factory(frameURL) {
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const entry = frameStoreJunkyard.pop();
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if ( entry === undefined ) {
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return new FrameStore(frameURL);
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}
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return entry.init(frameURL);
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}
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};
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/******************************************************************************/
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// To mitigate memory churning
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const pageStoreJunkyard = [];
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const pageStoreJunkyardMax = 10;
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const PageStore = class {
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constructor(tabId, context) {
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this.extraData = new Map();
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this.journal = [];
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this.journalTimer = null;
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this.journalLastCommitted = this.journalLastUncommitted = undefined;
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this.journalLastUncommittedURL = undefined;
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this.netFilteringCache = NetFilteringResultCache.factory();
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this.init(tabId, context);
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}
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static factory(tabId, context) {
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let entry = pageStoreJunkyard.pop();
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if ( entry === undefined ) {
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entry = new PageStore(tabId, context);
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} else {
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entry.init(tabId, context);
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}
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return entry;
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}
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// https://github.com/gorhill/uBlock/issues/3201
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// The context is used to determine whether we report behavior change
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// to the logger.
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init(tabId, context) {
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const tabContext = µb.tabContextManager.mustLookup(tabId);
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this.tabId = tabId;
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// If we are navigating from-to same site, remember whether large
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// media elements were temporarily allowed.
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if (
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typeof this.allowLargeMediaElementsUntil !== 'number' ||
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tabContext.rootHostname !== this.tabHostname
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) {
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this.allowLargeMediaElementsUntil = Date.now();
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}
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this.tabHostname = tabContext.rootHostname;
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this.title = tabContext.rawURL;
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this.rawURL = tabContext.rawURL;
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this.hostnameToCountMap = new Map();
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this.contentLastModified = 0;
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this.logData = undefined;
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this.perLoadBlockedRequestCount = 0;
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this.perLoadAllowedRequestCount = 0;
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this.remoteFontCount = 0;
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this.popupBlockedCount = 0;
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this.largeMediaCount = 0;
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this.largeMediaTimer = null;
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this.allowLargeMediaElementsRegex = undefined;
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this.extraData.clear();
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this.frameAddCount = 0;
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this.frames = new Map();
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this.setFrameURL(0, tabContext.rawURL);
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// https://github.com/uBlockOrigin/uBlock-issues/issues/314
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const masterSwitch = tabContext.getNetFilteringSwitch();
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this.noCosmeticFiltering = µb.sessionSwitches.evaluateZ(
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'no-cosmetic-filtering',
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tabContext.rootHostname
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) === true;
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if (
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masterSwitch &&
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this.noCosmeticFiltering &&
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µb.logger.enabled &&
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context === 'tabCommitted'
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) {
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µb.filteringContext
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.duplicate()
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.fromTabId(tabId)
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.setURL(tabContext.rawURL)
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.setRealm('cosmetic')
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.setType('dom')
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.setFilter(µb.sessionSwitches.toLogData())
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.toLogger();
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}
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return this;
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}
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reuse(context) {
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// When force refreshing a page, the page store data needs to be reset.
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// If the hostname changes, we can't merely just update the context.
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const tabContext = µb.tabContextManager.mustLookup(this.tabId);
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if ( tabContext.rootHostname !== this.tabHostname ) {
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context = '';
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}
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// If URL changes without a page reload (more and more common), then
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// we need to keep all that we collected for reuse. In particular,
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// not doing so was causing a problem in `videos.foxnews.com`:
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// clicking a video thumbnail would not work, because the frame
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// hierarchy structure was flushed from memory, while not really being
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// flushed on the page.
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if ( context === 'tabUpdated' ) {
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// As part of https://github.com/chrisaljoudi/uBlock/issues/405
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// URL changed, force a re-evaluation of filtering switch
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this.rawURL = tabContext.rawURL;
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this.setFrameURL(0, this.rawURL);
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return this;
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}
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// A new page is completely reloaded from scratch, reset all.
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if ( this.largeMediaTimer !== null ) {
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clearTimeout(this.largeMediaTimer);
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this.largeMediaTimer = null;
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}
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this.disposeFrameStores();
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this.init(this.tabId, context);
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return this;
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}
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dispose() {
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this.tabHostname = '';
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this.title = '';
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this.rawURL = '';
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this.hostnameToCountMap = null;
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this.netFilteringCache.empty();
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this.allowLargeMediaElementsUntil = Date.now();
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this.allowLargeMediaElementsRegex = undefined;
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if ( this.largeMediaTimer !== null ) {
|
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clearTimeout(this.largeMediaTimer);
|
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this.largeMediaTimer = null;
|
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}
|
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this.disposeFrameStores();
|
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if ( this.journalTimer !== null ) {
|
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clearTimeout(this.journalTimer);
|
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this.journalTimer = null;
|
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}
|
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this.journal = [];
|
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this.journalLastUncommittedURL = undefined;
|
|
if ( pageStoreJunkyard.length < pageStoreJunkyardMax ) {
|
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pageStoreJunkyard.push(this);
|
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}
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return null;
|
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}
|
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|
|
disposeFrameStores() {
|
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for ( const frameStore of this.frames.values() ) {
|
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frameStore.dispose();
|
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}
|
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this.frames.clear();
|
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}
|
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|
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getFrameStore(frameId) {
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return this.frames.get(frameId) || null;
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}
|
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setFrameURL(frameId, frameURL) {
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let frameStore = this.frames.get(frameId);
|
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if ( frameStore !== undefined ) {
|
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frameStore.init(frameURL);
|
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} else {
|
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frameStore = FrameStore.factory(frameURL);
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this.frames.set(frameId, frameStore);
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this.frameAddCount += 1;
|
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if ( (this.frameAddCount & 0b111111) === 0 ) {
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this.pruneFrames();
|
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}
|
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}
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return frameStore;
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}
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|
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// There is no event to tell us a specific subframe has been removed from
|
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// the main document. The code below will remove subframes which are no
|
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// longer present in the root document. Removing obsolete subframes is
|
|
// not a critical task, so this is executed just once on a while, to avoid
|
|
// bloated dictionary of subframes.
|
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// A TTL is used to avoid race conditions when new iframes are added
|
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// through the webRequest API but still not yet visible through the
|
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// webNavigation API.
|
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async pruneFrames() {
|
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let entries;
|
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try {
|
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entries = await webext.webNavigation.getAllFrames({
|
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tabId: this.tabId
|
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});
|
|
} catch(ex) {
|
|
}
|
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if ( Array.isArray(entries) === false ) { return; }
|
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const toKeep = new Set();
|
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for ( const { frameId } of entries ) {
|
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toKeep.add(frameId);
|
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}
|
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const obsolete = Date.now() - 60000;
|
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for ( const [ frameId, { t0 } ] of this.frames ) {
|
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if ( toKeep.has(frameId) || t0 >= obsolete ) { continue; }
|
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this.frames.delete(frameId);
|
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}
|
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}
|
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|
|
getNetFilteringSwitch() {
|
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return µb.tabContextManager
|
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.mustLookup(this.tabId)
|
|
.getNetFilteringSwitch();
|
|
}
|
|
|
|
getSpecificCosmeticFilteringSwitch() {
|
|
return this.noCosmeticFiltering !== true;
|
|
}
|
|
|
|
toggleNetFilteringSwitch(url, scope, state) {
|
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µb.toggleNetFilteringSwitch(url, scope, state);
|
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this.netFilteringCache.empty();
|
|
}
|
|
|
|
injectLargeMediaElementScriptlet() {
|
|
vAPI.tabs.executeScript(this.tabId, {
|
|
file: '/js/scriptlets/load-large-media-interactive.js',
|
|
allFrames: true,
|
|
runAt: 'document_idle',
|
|
});
|
|
µb.contextMenu.update(this.tabId);
|
|
}
|
|
|
|
temporarilyAllowLargeMediaElements(state) {
|
|
this.largeMediaCount = 0;
|
|
µb.contextMenu.update(this.tabId);
|
|
if ( state ) {
|
|
this.allowLargeMediaElementsUntil = 0;
|
|
this.allowLargeMediaElementsRegex = undefined;
|
|
} else {
|
|
this.allowLargeMediaElementsUntil = Date.now();
|
|
}
|
|
µb.scriptlets.injectDeep(this.tabId, 'load-large-media-all');
|
|
}
|
|
|
|
// https://github.com/gorhill/uBlock/issues/2053
|
|
// There is no way around using journaling to ensure we deal properly with
|
|
// potentially out of order navigation events vs. network request events.
|
|
journalAddRequest(hostname, result) {
|
|
if ( hostname === '' ) { return; }
|
|
this.journal.push(
|
|
hostname,
|
|
result === 1 ? 0x00000001 : 0x00010000
|
|
);
|
|
if ( this.journalTimer === null ) {
|
|
this.journalTimer = vAPI.setTimeout(
|
|
( ) => { this.journalProcess(true); },
|
|
µb.hiddenSettings.requestJournalProcessPeriod
|
|
);
|
|
}
|
|
}
|
|
|
|
journalAddRootFrame(type, url) {
|
|
if ( type === 'committed' ) {
|
|
this.journalLastCommitted = this.journal.length;
|
|
if (
|
|
this.journalLastUncommitted !== undefined &&
|
|
this.journalLastUncommitted < this.journalLastCommitted &&
|
|
this.journalLastUncommittedURL === url
|
|
) {
|
|
this.journalLastCommitted = this.journalLastUncommitted;
|
|
this.journalLastUncommitted = undefined;
|
|
}
|
|
} else if ( type === 'uncommitted' ) {
|
|
this.journalLastUncommitted = this.journal.length;
|
|
this.journalLastUncommittedURL = url;
|
|
}
|
|
if ( this.journalTimer !== null ) {
|
|
clearTimeout(this.journalTimer);
|
|
}
|
|
this.journalTimer = vAPI.setTimeout(
|
|
( ) => { this.journalProcess(true); },
|
|
µb.hiddenSettings.requestJournalProcessPeriod
|
|
);
|
|
}
|
|
|
|
journalProcess(fromTimer) {
|
|
if ( !fromTimer ) {
|
|
clearTimeout(this.journalTimer);
|
|
}
|
|
this.journalTimer = null;
|
|
|
|
const journal = this.journal;
|
|
const now = Date.now();
|
|
let aggregateCounts = 0;
|
|
let pivot = this.journalLastCommitted || 0;
|
|
|
|
// Everything after pivot originates from current page.
|
|
for ( let i = pivot; i < journal.length; i += 2 ) {
|
|
const hostname = journal[i];
|
|
let hostnameCounts = this.hostnameToCountMap.get(hostname);
|
|
if ( hostnameCounts === undefined ) {
|
|
hostnameCounts = 0;
|
|
this.contentLastModified = now;
|
|
}
|
|
let count = journal[i+1];
|
|
this.hostnameToCountMap.set(hostname, hostnameCounts + count);
|
|
aggregateCounts += count;
|
|
}
|
|
this.perLoadBlockedRequestCount += aggregateCounts & 0xFFFF;
|
|
this.perLoadAllowedRequestCount += aggregateCounts >>> 16 & 0xFFFF;
|
|
this.journalLastCommitted = undefined;
|
|
|
|
// https://github.com/chrisaljoudi/uBlock/issues/905#issuecomment-76543649
|
|
// No point updating the badge if it's not being displayed.
|
|
if ( (aggregateCounts & 0xFFFF) && µb.userSettings.showIconBadge ) {
|
|
µb.updateToolbarIcon(this.tabId, 0x02);
|
|
}
|
|
|
|
// Everything before pivot does not originate from current page -- we
|
|
// still need to bump global blocked/allowed counts.
|
|
for ( let i = 0; i < pivot; i += 2 ) {
|
|
aggregateCounts += journal[i+1];
|
|
}
|
|
if ( aggregateCounts !== 0 ) {
|
|
µb.localSettings.blockedRequestCount +=
|
|
aggregateCounts & 0xFFFF;
|
|
µb.localSettings.allowedRequestCount +=
|
|
aggregateCounts >>> 16 & 0xFFFF;
|
|
µb.localSettingsLastModified = now;
|
|
}
|
|
journal.length = 0;
|
|
}
|
|
|
|
filterRequest(fctxt) {
|
|
fctxt.filter = undefined;
|
|
fctxt.redirectURL = undefined;
|
|
|
|
if ( this.getNetFilteringSwitch(fctxt) === false ) {
|
|
return 0;
|
|
}
|
|
|
|
if (
|
|
fctxt.itype === fctxt.CSP_REPORT &&
|
|
this.filterCSPReport(fctxt) === 1
|
|
) {
|
|
return 1;
|
|
}
|
|
|
|
if (
|
|
(fctxt.itype & fctxt.FONT_ANY) !== 0 &&
|
|
this.filterFont(fctxt) === 1 )
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (
|
|
fctxt.itype === fctxt.SCRIPT &&
|
|
this.filterScripting(fctxt, true) === 1
|
|
) {
|
|
return 1;
|
|
}
|
|
|
|
const cacheableResult = this.cacheableResults.has(fctxt.itype);
|
|
|
|
if ( cacheableResult ) {
|
|
const entry = this.netFilteringCache.lookupResult(fctxt);
|
|
if ( entry !== undefined ) {
|
|
fctxt.redirectURL = entry.redirectURL;
|
|
fctxt.filter = entry.logData;
|
|
return entry.result;
|
|
}
|
|
}
|
|
|
|
const requestType = fctxt.type;
|
|
const loggerEnabled = µb.logger.enabled;
|
|
|
|
// Dynamic URL filtering.
|
|
let result = µb.sessionURLFiltering.evaluateZ(
|
|
fctxt.getTabHostname(),
|
|
fctxt.url,
|
|
requestType
|
|
);
|
|
if ( result !== 0 && loggerEnabled ) {
|
|
fctxt.filter = µb.sessionURLFiltering.toLogData();
|
|
}
|
|
|
|
// Dynamic hostname/type filtering.
|
|
if ( result === 0 && µb.userSettings.advancedUserEnabled ) {
|
|
result = µb.sessionFirewall.evaluateCellZY(
|
|
fctxt.getTabHostname(),
|
|
fctxt.getHostname(),
|
|
requestType
|
|
);
|
|
if ( result !== 0 && result !== 3 && loggerEnabled ) {
|
|
fctxt.filter = µb.sessionFirewall.toLogData();
|
|
}
|
|
}
|
|
|
|
// Static filtering has lowest precedence.
|
|
const snfe = µb.staticNetFilteringEngine;
|
|
if ( result === 0 || result === 3 ) {
|
|
result = snfe.matchString(fctxt);
|
|
if ( result !== 0 ) {
|
|
if ( loggerEnabled ) {
|
|
fctxt.filter = snfe.toLogData();
|
|
}
|
|
// https://github.com/uBlockOrigin/uBlock-issues/issues/943
|
|
// Blanket-except blocked aliased canonical hostnames?
|
|
if (
|
|
result === 1 &&
|
|
fctxt.aliasURL !== undefined &&
|
|
snfe.isBlockImportant() === false &&
|
|
this.shouldExceptCname(fctxt)
|
|
) {
|
|
return 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Click-to-load?
|
|
// When frameId is not -1, the resource is always sub_frame.
|
|
if ( result === 1 && fctxt.frameId !== -1 ) {
|
|
const frameStore = this.getFrameStore(fctxt.frameId);
|
|
if ( frameStore !== null && frameStore.clickToLoad ) {
|
|
result = 2;
|
|
if ( loggerEnabled ) {
|
|
fctxt.pushFilter({
|
|
result,
|
|
source: 'network',
|
|
raw: 'click-to-load',
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
// Modifier(s)?
|
|
// A modifier is an action which transform the original network request.
|
|
// https://github.com/gorhill/uBlock/issues/949
|
|
// Redirect blocked request?
|
|
// https://github.com/uBlockOrigin/uBlock-issues/issues/760
|
|
// Redirect non-blocked request?
|
|
if ( (fctxt.itype & fctxt.INLINE_ANY) === 0 ) {
|
|
if ( result === 1 ) {
|
|
this.redirectBlockedRequest(fctxt);
|
|
} else if ( snfe.hasQuery(fctxt) ) {
|
|
this.redirectNonBlockedRequest(fctxt);
|
|
}
|
|
}
|
|
|
|
if ( cacheableResult ) {
|
|
this.netFilteringCache.rememberResult(fctxt, result);
|
|
} else if ( result === 1 && this.collapsibleResources.has(fctxt.itype) ) {
|
|
this.netFilteringCache.rememberBlock(fctxt);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
filterOnHeaders(fctxt, headers) {
|
|
fctxt.filter = undefined;
|
|
|
|
if ( this.getNetFilteringSwitch(fctxt) === false ) { return 0; }
|
|
|
|
let result = µb.staticNetFilteringEngine.matchHeaders(fctxt, headers);
|
|
if ( result === 0 ) { return 0; }
|
|
|
|
const loggerEnabled = µb.logger.enabled;
|
|
if ( loggerEnabled ) {
|
|
fctxt.filter = µb.staticNetFilteringEngine.toLogData();
|
|
}
|
|
|
|
// Dynamic filtering allow rules
|
|
// URL filtering
|
|
if (
|
|
result === 1 &&
|
|
µb.sessionURLFiltering.evaluateZ(
|
|
fctxt.getTabHostname(),
|
|
fctxt.url,
|
|
fctxt.type
|
|
) === 2
|
|
) {
|
|
result = 2;
|
|
if ( loggerEnabled ) {
|
|
fctxt.filter = µb.sessionURLFiltering.toLogData();
|
|
}
|
|
}
|
|
// Hostname filtering
|
|
if (
|
|
result === 1 &&
|
|
µb.userSettings.advancedUserEnabled &&
|
|
µb.sessionFirewall.evaluateCellZY(
|
|
fctxt.getTabHostname(),
|
|
fctxt.getHostname(),
|
|
fctxt.type
|
|
) === 2
|
|
) {
|
|
result = 2;
|
|
if ( loggerEnabled ) {
|
|
fctxt.filter = µb.sessionFirewall.toLogData();
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
redirectBlockedRequest(fctxt) {
|
|
if ( µb.hiddenSettings.ignoreRedirectFilters === true ) { return; }
|
|
const directives = µb.staticNetFilteringEngine.redirectRequest(fctxt);
|
|
if ( directives === undefined ) { return; }
|
|
if ( µb.logger.enabled !== true ) { return; }
|
|
fctxt.pushFilters(directives.map(a => a.logData()));
|
|
if ( fctxt.redirectURL === undefined ) { return; }
|
|
fctxt.pushFilter({
|
|
source: 'redirect',
|
|
raw: µb.redirectEngine.resourceNameRegister
|
|
});
|
|
}
|
|
|
|
redirectNonBlockedRequest(fctxt) {
|
|
const directives = µb.staticNetFilteringEngine.filterQuery(fctxt);
|
|
if ( directives === undefined ) { return; }
|
|
if ( µb.logger.enabled !== true ) { return; }
|
|
fctxt.pushFilters(directives.map(a => a.logData()));
|
|
if ( fctxt.redirectURL === undefined ) { return; }
|
|
fctxt.pushFilter({
|
|
source: 'redirect',
|
|
raw: fctxt.redirectURL
|
|
});
|
|
}
|
|
|
|
filterCSPReport(fctxt) {
|
|
if (
|
|
µb.sessionSwitches.evaluateZ(
|
|
'no-csp-reports',
|
|
fctxt.getHostname()
|
|
)
|
|
) {
|
|
if ( µb.logger.enabled ) {
|
|
fctxt.filter = µb.sessionSwitches.toLogData();
|
|
}
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
filterFont(fctxt) {
|
|
if ( fctxt.itype === fctxt.FONT ) {
|
|
this.remoteFontCount += 1;
|
|
}
|
|
if (
|
|
µb.sessionSwitches.evaluateZ(
|
|
'no-remote-fonts',
|
|
fctxt.getTabHostname()
|
|
) !== false
|
|
) {
|
|
if ( µb.logger.enabled ) {
|
|
fctxt.filter = µb.sessionSwitches.toLogData();
|
|
}
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
filterScripting(fctxt, netFiltering) {
|
|
fctxt.filter = undefined;
|
|
if ( netFiltering === undefined ) {
|
|
netFiltering = this.getNetFilteringSwitch(fctxt);
|
|
}
|
|
if (
|
|
netFiltering === false ||
|
|
µb.sessionSwitches.evaluateZ(
|
|
'no-scripting',
|
|
fctxt.getTabHostname()
|
|
) === false
|
|
) {
|
|
return 0;
|
|
}
|
|
if ( µb.logger.enabled ) {
|
|
fctxt.filter = µb.sessionSwitches.toLogData();
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
// The caller is responsible to check whether filtering is enabled or not.
|
|
filterLargeMediaElement(fctxt, size) {
|
|
fctxt.filter = undefined;
|
|
|
|
if ( this.allowLargeMediaElementsUntil === 0 ) {
|
|
return 0;
|
|
}
|
|
// Disregard large media elements previously allowed: for example, to
|
|
// seek inside a previously allowed audio/video.
|
|
if (
|
|
this.allowLargeMediaElementsRegex instanceof RegExp &&
|
|
this.allowLargeMediaElementsRegex.test(fctxt.url)
|
|
) {
|
|
return 0;
|
|
}
|
|
if ( Date.now() < this.allowLargeMediaElementsUntil ) {
|
|
const sources = this.allowLargeMediaElementsRegex instanceof RegExp
|
|
? [ this.allowLargeMediaElementsRegex.source ]
|
|
: [];
|
|
sources.push('^' + µb.escapeRegex(fctxt.url));
|
|
this.allowLargeMediaElementsRegex = new RegExp(sources.join('|'));
|
|
return 0;
|
|
}
|
|
if (
|
|
µb.sessionSwitches.evaluateZ(
|
|
'no-large-media',
|
|
fctxt.getTabHostname()
|
|
) !== true
|
|
) {
|
|
this.allowLargeMediaElementsUntil = 0;
|
|
return 0;
|
|
}
|
|
if ( (size >>> 10) < µb.userSettings.largeMediaSize ) {
|
|
return 0;
|
|
}
|
|
|
|
this.largeMediaCount += 1;
|
|
if ( this.largeMediaTimer === null ) {
|
|
this.largeMediaTimer = vAPI.setTimeout(( ) => {
|
|
this.largeMediaTimer = null;
|
|
this.injectLargeMediaElementScriptlet();
|
|
}, 500);
|
|
}
|
|
|
|
if ( µb.logger.enabled ) {
|
|
fctxt.filter = µb.sessionSwitches.toLogData();
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
clickToLoad(frameId, frameURL) {
|
|
let frameStore = this.getFrameStore(frameId);
|
|
if ( frameStore === null ) {
|
|
frameStore = this.setFrameURL(frameId, frameURL);
|
|
}
|
|
this.netFilteringCache.forgetResult(
|
|
this.tabHostname,
|
|
'sub_frame',
|
|
frameURL
|
|
);
|
|
frameStore.clickToLoad = true;
|
|
}
|
|
|
|
shouldExceptCname(fctxt) {
|
|
let exceptCname;
|
|
let frameStore;
|
|
if ( fctxt.docId !== undefined ) {
|
|
frameStore = this.getFrameStore(fctxt.docId);
|
|
if ( frameStore instanceof Object ) {
|
|
exceptCname = frameStore.exceptCname;
|
|
}
|
|
}
|
|
if ( exceptCname === undefined ) {
|
|
const result = µb.staticNetFilteringEngine.matchStringReverse(
|
|
'cname',
|
|
frameStore instanceof Object
|
|
? frameStore.rawURL
|
|
: fctxt.getDocOrigin()
|
|
);
|
|
if ( result === 2 ) {
|
|
exceptCname = µb.logger.enabled
|
|
? µb.staticNetFilteringEngine.toLogData()
|
|
: true;
|
|
} else {
|
|
exceptCname = false;
|
|
}
|
|
if ( frameStore instanceof Object ) {
|
|
frameStore.exceptCname = exceptCname;
|
|
}
|
|
}
|
|
if ( exceptCname === false ) { return false; }
|
|
if ( exceptCname instanceof Object ) {
|
|
fctxt.pushFilter(exceptCname);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
getBlockedResources(request, response) {
|
|
const normalURL = µb.normalizePageURL(this.tabId, request.frameURL);
|
|
const resources = request.resources;
|
|
const fctxt = µb.filteringContext;
|
|
fctxt.fromTabId(this.tabId)
|
|
.setDocOriginFromURL(normalURL);
|
|
// Force some resources to go through the filtering engine in order to
|
|
// populate the blocked-resources cache. This is required because for
|
|
// some resources it's not possible to detect whether they were blocked
|
|
// content script-side (i.e. `iframes` -- unlike `img`).
|
|
if ( Array.isArray(resources) && resources.length !== 0 ) {
|
|
for ( const resource of resources ) {
|
|
this.filterRequest(
|
|
fctxt.setType(resource.type).setURL(resource.url)
|
|
);
|
|
}
|
|
}
|
|
if ( this.netFilteringCache.hash === response.hash ) { return; }
|
|
response.hash = this.netFilteringCache.hash;
|
|
response.blockedResources =
|
|
this.netFilteringCache.lookupAllBlocked(fctxt.getDocHostname());
|
|
}
|
|
};
|
|
|
|
PageStore.prototype.cacheableResults = new Set([
|
|
µb.FilteringContext.SUB_FRAME,
|
|
]);
|
|
|
|
PageStore.prototype.collapsibleResources = new Set([
|
|
µb.FilteringContext.IMAGE,
|
|
µb.FilteringContext.MEDIA,
|
|
µb.FilteringContext.OBJECT,
|
|
µb.FilteringContext.SUB_FRAME,
|
|
]);
|
|
|
|
µb.PageStore = PageStore;
|
|
|
|
/******************************************************************************/
|
|
|
|
// <<<<<
|
|
// end of private namespace
|
|
|
|
}
|