mirror of https://github.com/gorhill/uBlock.git
144 lines
4.5 KiB
JavaScript
144 lines
4.5 KiB
JavaScript
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/*******************************************************************************
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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 no-fetch-if
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/******************************************************************************/
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// Important!
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// Isolate from global scope
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(function uBOL_noFetchIf() {
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/******************************************************************************/
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// $rulesetId$
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const argsList = self.$argsList$;
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const hostnamesMap = new Map(self.$hostnamesMap$);
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/******************************************************************************/
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const scriptlet = (
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conditions = ''
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) => {
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const needles = [];
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for ( const condition of conditions.split(/\s+/) ) {
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if ( condition === '' ) { continue; }
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const pos = condition.indexOf(':');
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let key, value;
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if ( pos !== -1 ) {
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key = condition.slice(0, pos);
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value = condition.slice(pos + 1);
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} else {
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key = 'url';
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value = condition;
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}
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if ( value === '' ) {
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value = '^';
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} else if ( value.startsWith('/') && value.endsWith('/') ) {
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value = value.slice(1, -1);
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} else {
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value = value.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
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}
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needles.push({ key, re: new RegExp(value) });
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}
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self.fetch = new Proxy(self.fetch, {
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apply: function(target, thisArg, args) {
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let proceed = true;
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try {
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let details;
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if ( args[0] instanceof self.Request ) {
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details = args[0];
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} else {
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details = Object.assign({ url: args[0] }, args[1]);
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}
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const props = new Map();
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for ( const prop in details ) {
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let v = details[prop];
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if ( typeof v !== 'string' ) {
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try { v = JSON.stringify(v); }
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catch(ex) { }
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}
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if ( typeof v !== 'string' ) { continue; }
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props.set(prop, v);
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}
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proceed = needles.length === 0;
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for ( const { key, re } of needles ) {
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if (
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props.has(key) === false ||
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re.test(props.get(key)) === false
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) {
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proceed = true;
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break;
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}
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}
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} catch(ex) {
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}
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return proceed
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? Reflect.apply(target, thisArg, args)
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: Promise.resolve(new Response());
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}
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});
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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 argsIndices = hostnamesMap.get(hn);
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if ( typeof argsIndices === 'number' ) { argsIndices = [ argsIndices ]; }
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for ( const argsIndex of argsIndices ) {
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const details = argsList[argsIndex];
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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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argsList.length = 0;
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hostnamesMap.clear();
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/******************************************************************************/
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})();
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/******************************************************************************/
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