mirror of
https://github.com/gorhill/uBlock.git
synced 2024-09-02 09:09:38 +02:00
233 lines
7.5 KiB
JavaScript
233 lines
7.5 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 set-constant.entity
|
|
/// alias set.entity
|
|
|
|
/******************************************************************************/
|
|
|
|
// Important!
|
|
// Isolate from global scope
|
|
(function uBOL_setConstantEntity() {
|
|
|
|
/******************************************************************************/
|
|
|
|
// $rulesetId$
|
|
|
|
const argsList = self.$argsList$;
|
|
|
|
const entitiesMap = new Map(self.$entitiesMap$);
|
|
|
|
/******************************************************************************/
|
|
|
|
const scriptlet = (
|
|
chain = '',
|
|
cValue = ''
|
|
) => {
|
|
if ( chain === '' ) { return; }
|
|
const trappedProp = (( ) => {
|
|
const pos = chain.lastIndexOf('.');
|
|
if ( pos === -1 ) { return chain; }
|
|
return chain.slice(pos+1);
|
|
})();
|
|
if ( trappedProp === '' ) { return; }
|
|
const objectDefineProperty = Object.defineProperty.bind(Object);
|
|
const cloakFunc = fn => {
|
|
objectDefineProperty(fn, 'name', { value: trappedProp });
|
|
const proxy = new Proxy(fn, {
|
|
defineProperty(target, prop) {
|
|
if ( prop !== 'toString' ) {
|
|
return Reflect.deleteProperty(...arguments);
|
|
}
|
|
return true;
|
|
},
|
|
deleteProperty(target, prop) {
|
|
if ( prop !== 'toString' ) {
|
|
return Reflect.deleteProperty(...arguments);
|
|
}
|
|
return true;
|
|
},
|
|
get(target, prop) {
|
|
if ( prop === 'toString' ) {
|
|
return function() {
|
|
return `function ${trappedProp}() { [native code] }`;
|
|
}.bind(null);
|
|
}
|
|
return Reflect.get(...arguments);
|
|
},
|
|
});
|
|
return proxy;
|
|
};
|
|
if ( cValue === 'undefined' ) {
|
|
cValue = undefined;
|
|
} else if ( cValue === 'false' ) {
|
|
cValue = false;
|
|
} else if ( cValue === 'true' ) {
|
|
cValue = true;
|
|
} else if ( cValue === 'null' ) {
|
|
cValue = null;
|
|
} else if ( cValue === "''" ) {
|
|
cValue = '';
|
|
} else if ( cValue === '[]' ) {
|
|
cValue = [];
|
|
} else if ( cValue === '{}' ) {
|
|
cValue = {};
|
|
} else if ( cValue === 'noopFunc' ) {
|
|
cValue = cloakFunc(function(){});
|
|
} else if ( cValue === 'trueFunc' ) {
|
|
cValue = cloakFunc(function(){ return true; });
|
|
} else if ( cValue === 'falseFunc' ) {
|
|
cValue = cloakFunc(function(){ return false; });
|
|
} else if ( /^\d+$/.test(cValue) ) {
|
|
cValue = parseFloat(cValue);
|
|
if ( isNaN(cValue) ) { return; }
|
|
if ( Math.abs(cValue) > 0x7FFF ) { return; }
|
|
} else {
|
|
return;
|
|
}
|
|
let aborted = false;
|
|
const mustAbort = function(v) {
|
|
if ( aborted ) { return true; }
|
|
aborted =
|
|
(v !== undefined && v !== null) &&
|
|
(cValue !== undefined && cValue !== null) &&
|
|
(typeof v !== typeof cValue);
|
|
return aborted;
|
|
};
|
|
// https://github.com/uBlockOrigin/uBlock-issues/issues/156
|
|
// Support multiple trappers for the same property.
|
|
const trapProp = function(owner, prop, configurable, handler) {
|
|
if ( handler.init(owner[prop]) === false ) { return; }
|
|
const odesc = Object.getOwnPropertyDescriptor(owner, prop);
|
|
let prevGetter, prevSetter;
|
|
if ( odesc instanceof Object ) {
|
|
owner[prop] = cValue;
|
|
if ( odesc.get instanceof Function ) {
|
|
prevGetter = odesc.get;
|
|
}
|
|
if ( odesc.set instanceof Function ) {
|
|
prevSetter = odesc.set;
|
|
}
|
|
}
|
|
try {
|
|
objectDefineProperty(owner, prop, {
|
|
configurable,
|
|
get() {
|
|
if ( prevGetter !== undefined ) {
|
|
prevGetter();
|
|
}
|
|
return handler.getter(); // cValue
|
|
},
|
|
set(a) {
|
|
if ( prevSetter !== undefined ) {
|
|
prevSetter(a);
|
|
}
|
|
handler.setter(a);
|
|
}
|
|
});
|
|
} catch(ex) {
|
|
}
|
|
};
|
|
const trapChain = function(owner, chain) {
|
|
const pos = chain.indexOf('.');
|
|
if ( pos === -1 ) {
|
|
trapProp(owner, chain, false, {
|
|
v: undefined,
|
|
init: function(v) {
|
|
if ( mustAbort(v) ) { return false; }
|
|
this.v = v;
|
|
return true;
|
|
},
|
|
getter: function() {
|
|
return cValue;
|
|
},
|
|
setter: function(a) {
|
|
if ( mustAbort(a) === false ) { return; }
|
|
cValue = a;
|
|
}
|
|
});
|
|
return;
|
|
}
|
|
const prop = chain.slice(0, pos);
|
|
const v = owner[prop];
|
|
chain = chain.slice(pos + 1);
|
|
if ( v instanceof Object || typeof v === 'object' && v !== null ) {
|
|
trapChain(v, chain);
|
|
return;
|
|
}
|
|
trapProp(owner, prop, true, {
|
|
v: undefined,
|
|
init: function(v) {
|
|
this.v = v;
|
|
return true;
|
|
},
|
|
getter: function() {
|
|
return this.v;
|
|
},
|
|
setter: function(a) {
|
|
this.v = a;
|
|
if ( a instanceof Object ) {
|
|
trapChain(a, chain);
|
|
}
|
|
}
|
|
});
|
|
};
|
|
trapChain(window, chain);
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
const hnparts = [];
|
|
try { hnparts.push(...document.location.hostname.split('.')); } catch(ex) { }
|
|
const hnpartslen = hnparts.length - 1;
|
|
for ( let i = 0; i < hnpartslen; i++ ) {
|
|
for ( let j = hnpartslen; j > i; j-- ) {
|
|
const hn = hnparts.slice(i).join('.');
|
|
const en = hnparts.slice(i,j).join('.');
|
|
let argsIndices = entitiesMap.get(en);
|
|
if ( argsIndices === undefined ) { continue; }
|
|
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) {}
|
|
}
|
|
}
|
|
}
|
|
|
|
argsList.length = 0;
|
|
entitiesMap.clear();
|
|
|
|
/******************************************************************************/
|
|
|
|
})();
|
|
|
|
/******************************************************************************/
|