mirror of
https://github.com/gorhill/uBlock.git
synced 2024-09-04 10:09:38 +02:00
144 lines
4.0 KiB
JavaScript
144 lines
4.0 KiB
JavaScript
/*******************************************************************************
|
|
|
|
uBlock Origin - a browser extension to block requests.
|
|
Copyright (C) 2019-present Raymond Hill
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see {http://www.gnu.org/licenses/}.
|
|
|
|
Home: https://github.com/gorhill/uBlock
|
|
|
|
The scriptlets below are meant to be injected only into a
|
|
web page context.
|
|
*/
|
|
|
|
/* jshint esversion:11 */
|
|
|
|
'use strict';
|
|
|
|
/******************************************************************************/
|
|
|
|
/// name abort-on-property-read
|
|
/// alias aopr
|
|
|
|
/******************************************************************************/
|
|
|
|
// Important!
|
|
// Isolate from global scope
|
|
(function uBOL_abortOnPropertyRead() {
|
|
|
|
/******************************************************************************/
|
|
|
|
// $rulesetId$
|
|
|
|
const argsList = self.$argsList$;
|
|
|
|
const hostnamesMap = new Map(self.$hostnamesMap$);
|
|
|
|
/******************************************************************************/
|
|
|
|
const ObjGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
|
|
const ObjDefineProperty = Object.defineProperty;
|
|
|
|
const magic =
|
|
String.fromCharCode(Date.now() % 26 + 97) +
|
|
Math.floor(Math.random() * 982451653 + 982451653).toString(36);
|
|
|
|
const abort = function() {
|
|
throw new ReferenceError(magic);
|
|
};
|
|
|
|
const makeProxy = function(owner, chain) {
|
|
const pos = chain.indexOf('.');
|
|
if ( pos === -1 ) {
|
|
const desc = ObjGetOwnPropertyDescriptor(owner, chain);
|
|
if ( !desc || desc.get !== abort ) {
|
|
ObjDefineProperty(owner, chain, {
|
|
get: abort,
|
|
set: function(){}
|
|
});
|
|
}
|
|
return;
|
|
}
|
|
|
|
const prop = chain.slice(0, pos);
|
|
let v = owner[prop];
|
|
chain = chain.slice(pos + 1);
|
|
if ( v ) {
|
|
makeProxy(v, chain);
|
|
return;
|
|
}
|
|
|
|
const desc = ObjGetOwnPropertyDescriptor(owner, prop);
|
|
if ( desc && desc.set !== undefined ) { return; }
|
|
|
|
ObjDefineProperty(owner, prop, {
|
|
get: function() { return v; },
|
|
set: function(a) {
|
|
v = a;
|
|
if ( a instanceof Object ) {
|
|
makeProxy(a, chain);
|
|
}
|
|
}
|
|
});
|
|
};
|
|
|
|
const scriptlet = (
|
|
chain = ''
|
|
) => {
|
|
const owner = window;
|
|
makeProxy(owner, chain);
|
|
const oe = window.onerror;
|
|
window.onerror = function(msg, src, line, col, error) {
|
|
if ( typeof msg === 'string' && msg.includes(magic) ) {
|
|
return true;
|
|
}
|
|
if ( oe instanceof Function ) {
|
|
return oe(msg, src, line, col, error);
|
|
}
|
|
}.bind();
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
let hn;
|
|
try { hn = document.location.hostname; } catch(ex) { }
|
|
while ( hn ) {
|
|
if ( hostnamesMap.has(hn) ) {
|
|
let argsIndices = hostnamesMap.get(hn);
|
|
if ( typeof argsIndices === 'number' ) { argsIndices = [ argsIndices ]; }
|
|
for ( const argsIndex of argsIndices ) {
|
|
const details = argsList[argsIndex];
|
|
if ( details.n && details.n.includes(hn) ) { continue; }
|
|
try { scriptlet(...details.a); } catch(ex) {}
|
|
}
|
|
}
|
|
if ( hn === '*' ) { break; }
|
|
const pos = hn.indexOf('.');
|
|
if ( pos !== -1 ) {
|
|
hn = hn.slice(pos + 1);
|
|
} else {
|
|
hn = '*';
|
|
}
|
|
}
|
|
|
|
argsList.length = 0;
|
|
hostnamesMap.clear();
|
|
|
|
/******************************************************************************/
|
|
|
|
})();
|
|
|
|
/******************************************************************************/
|
|
|