mirror of
https://github.com/gorhill/uBlock.git
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Related discussion: - https://github.com/uBlockOrigin/uBlock-issues/issues/1664#issuecomment-889647595
156 lines
4.8 KiB
JavaScript
156 lines
4.8 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2014-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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*/
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'use strict';
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/******************************************************************************/
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import { createRequire } from 'module';
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import './lib/punycode.js';
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import './lib/publicsuffixlist/publicsuffixlist.js';
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import globals from './js/globals.js';
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import snfe from './js/static-net-filtering.js';
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import { FilteringContext } from './js/filtering-context.js';
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import { LineIterator } from './js/text-iterators.js';
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import { StaticFilteringParser } from './js/static-filtering-parser.js';
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import {
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CompiledListReader,
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CompiledListWriter,
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} from './js/static-filtering-io.js';
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/******************************************************************************/
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function compileList(rawText, writer, options = {}) {
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const lineIter = new LineIterator(rawText);
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const parser = new StaticFilteringParser(true);
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const events = Array.isArray(options.events) ? options.events : undefined;
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parser.setMaxTokenLength(snfe.MAX_TOKEN_LENGTH);
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while ( lineIter.eot() === false ) {
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let line = lineIter.next();
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while ( line.endsWith(' \\') ) {
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if ( lineIter.peek(4) !== ' ' ) { break; }
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line = line.slice(0, -2).trim() + lineIter.next().trim();
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}
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parser.analyze(line);
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if ( parser.shouldIgnore() ) { continue; }
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if ( parser.category !== parser.CATStaticNetFilter ) { continue; }
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if ( parser.patternHasUnicode() && parser.toASCII() === false ) {
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continue;
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}
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if ( snfe.compile(parser, writer) ) { continue; }
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if ( snfe.error !== undefined && events !== undefined ) {
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options.events.push({
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type: 'error',
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text: snfe.error
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});
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}
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}
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return writer.toString();
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}
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function applyList(name, raw) {
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const writer = new CompiledListWriter();
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writer.properties.set('name', name);
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const compiled = compileList(raw, writer);
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const reader = new CompiledListReader(compiled);
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snfe.fromCompiled(reader);
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}
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async function enableWASM() {
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const wasmModuleFetcher = function(path) {
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return new Promise((resolve, reject) => {
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const require = createRequire(import.meta.url); // jshint ignore:line
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const fs = require('fs');
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fs.readFile(`${path}.wasm`, null, (err, data) => {
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if ( err ) { return reject(err); }
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return globals.WebAssembly.compile(data).then(module => {
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resolve(module);
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}).catch(reason => {
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reject(reason);
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});
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});
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});
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};
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try {
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const results = await Promise.all([
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globals.publicSuffixList.enableWASM(
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wasmModuleFetcher,
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'./lib/publicsuffixlist/wasm/'
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),
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snfe.enableWASM(
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wasmModuleFetcher,
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'./js/wasm/'
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),
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]);
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return results.every(a => a === true);
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} catch(reason) {
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console.info(reason);
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}
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return false;
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}
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function pslInit(raw) {
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if ( typeof raw !== 'string' || raw.trim() === '' ) {
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const require = createRequire(import.meta.url); // jshint ignore:line
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raw = require('./data/effective_tld_names.json');
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if ( typeof raw !== 'string' || raw.trim() === '' ) {
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console.error('Unable to populate public suffix list');
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return;
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}
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}
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globals.publicSuffixList.parse(raw, globals.punycode.toASCII);
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return globals.publicSuffixList;
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}
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function restart(lists, options = {}) {
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// Remove all filters
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reset();
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if ( Array.isArray(lists) && lists.length !== 0 ) {
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// Populate filtering engine with filter lists
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for ( const { name, raw } of lists ) {
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applyList(name, raw, options);
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}
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// Commit changes
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snfe.freeze();
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snfe.optimize();
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}
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return snfe;
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}
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function reset() {
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snfe.reset();
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}
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export {
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FilteringContext,
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enableWASM,
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pslInit,
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restart,
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};
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