mirror of
https://github.com/gorhill/uBlock.git
synced 2024-07-19 19:52:51 +02:00
2a40e67577
Fixed trusted sites not being excluded from declarative scripting. Assign "uBOL_"-prefixed name to anonymous scripting functions so that they can be easily found in performance profiler results in dev tools. Imrpove spread of chunks of filters across declarative scripting files.
146 lines
4.1 KiB
JavaScript
146 lines
4.1 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2019-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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The scriptlets below are meant to be injected only into a
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web page context.
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*/
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/* jshint esversion:11 */
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'use strict';
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/******************************************************************************/
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/// name abort-on-property-read
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/// alias aopr
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/******************************************************************************/
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// Important!
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// Isolate from global scope
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(function uBOL_abortOnPropertyRead() {
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/******************************************************************************/
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// $rulesetId$
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const argsMap = new Map(self.$argsMap$);
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const hostnamesMap = new Map(self.$hostnamesMap$);
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/******************************************************************************/
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const ObjGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
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const ObjDefineProperty = Object.defineProperty;
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const magic =
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String.fromCharCode(Date.now() % 26 + 97) +
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Math.floor(Math.random() * 982451653 + 982451653).toString(36);
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const abort = function() {
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throw new ReferenceError(magic);
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};
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const makeProxy = function(owner, chain) {
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const pos = chain.indexOf('.');
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if ( pos === -1 ) {
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const desc = ObjGetOwnPropertyDescriptor(owner, chain);
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if ( !desc || desc.get !== abort ) {
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ObjDefineProperty(owner, chain, {
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get: abort,
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set: function(){}
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});
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}
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return;
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}
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const prop = chain.slice(0, pos);
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let v = owner[prop];
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chain = chain.slice(pos + 1);
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if ( v ) {
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makeProxy(v, chain);
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return;
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}
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const desc = ObjGetOwnPropertyDescriptor(owner, prop);
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if ( desc && desc.set !== undefined ) { return; }
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ObjDefineProperty(owner, prop, {
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get: function() { return v; },
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set: function(a) {
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v = a;
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if ( a instanceof Object ) {
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makeProxy(a, chain);
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}
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}
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});
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};
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const scriptlet = (
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chain = ''
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) => {
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const owner = window;
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makeProxy(owner, chain);
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const oe = window.onerror;
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window.onerror = function(msg, src, line, col, error) {
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if ( typeof msg === 'string' && msg.includes(magic) ) {
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return true;
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}
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if ( oe instanceof Function ) {
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return oe(msg, src, line, col, error);
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}
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}.bind();
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};
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/******************************************************************************/
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let hn;
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try { hn = document.location.hostname; } catch(ex) { }
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while ( hn ) {
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if ( hostnamesMap.has(hn) ) {
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let argsHashes = hostnamesMap.get(hn);
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if ( typeof argsHashes === 'number' ) { argsHashes = [ argsHashes ]; }
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for ( const argsHash of argsHashes ) {
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const details = argsMap.get(argsHash);
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if ( details.n && details.n.includes(hn) ) { continue; }
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try { scriptlet(...details.a); } catch(ex) {}
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}
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}
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if ( hn === '*' ) { break; }
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const pos = hn.indexOf('.');
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if ( pos !== -1 ) {
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hn = hn.slice(pos + 1);
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} else {
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hn = '*';
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}
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}
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/******************************************************************************/
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argsMap.clear();
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hostnamesMap.clear();
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/******************************************************************************/
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})();
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/******************************************************************************/
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