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mirror of https://github.com/gorhill/uBlock.git synced 2024-09-03 01:29:39 +02:00
uBlock/platform/mv3/scriptlets/json-prune.js
2022-09-17 08:26:41 -04:00

122 lines
3.9 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 json-prune
try {
/******************************************************************************/
// https://github.com/uBlockOrigin/uBlock-issues/issues/1545
// - Add support for "remove everything if needle matches" case
(function(
rawPrunePaths = '',
rawNeedlePaths = ''
) {
const prunePaths = rawPrunePaths !== ''
? rawPrunePaths.split(/ +/)
: [];
let needlePaths;
if ( prunePaths.length === 0 ) { return; }
needlePaths = prunePaths.length !== 0 && rawNeedlePaths !== ''
? rawNeedlePaths.split(/ +/)
: [];
const findOwner = function(root, path, prune = false) {
let owner = root;
let chain = path;
for (;;) {
if ( typeof owner !== 'object' || owner === null ) {
return false;
}
const pos = chain.indexOf('.');
if ( pos === -1 ) {
if ( prune === false ) {
return owner.hasOwnProperty(chain);
}
if ( chain === '*' ) {
for ( const key in owner ) {
if ( owner.hasOwnProperty(key) === false ) { continue; }
delete owner[key];
}
} else if ( owner.hasOwnProperty(chain) ) {
delete owner[chain];
}
return true;
}
const prop = chain.slice(0, pos);
if (
prop === '[]' && Array.isArray(owner) ||
prop === '*' && owner instanceof Object
) {
const next = chain.slice(pos + 1);
let found = false;
for ( const key of Object.keys(owner) ) {
found = findOwner(owner[key], next, prune) || found;
}
return found;
}
if ( owner.hasOwnProperty(prop) === false ) { return false; }
owner = owner[prop];
chain = chain.slice(pos + 1);
}
};
const mustProcess = function(root) {
for ( const needlePath of needlePaths ) {
if ( findOwner(root, needlePath) === false ) {
return false;
}
}
return true;
};
const pruner = function(o) {
if ( mustProcess(o) === false ) { return o; }
for ( const path of prunePaths ) {
findOwner(o, path, true);
}
return o;
};
JSON.parse = new Proxy(JSON.parse, {
apply: function() {
return pruner(Reflect.apply(...arguments));
},
});
Response.prototype.json = new Proxy(Response.prototype.json, {
apply: function() {
return Reflect.apply(...arguments).then(o => pruner(o));
},
});
})(...self.$args$);
/******************************************************************************/
} catch(ex) {
}