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/*******************************************************************************
uBlock Origin - a comprehensive, efficient content blocker
Copyright (C) 2015-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
*/
'use strict';
/******************************************************************************/
import staticNetFilteringEngine from './static-net-filtering.js';
import µb from './background.js';
import { CompiledListWriter } from './static-filtering-io.js';
import { i18n$ } from './i18n.js';
import * as sfp from './static-filtering-parser.js';
import {
domainFromHostname,
hostnameFromURI,
} from './uri-utils.js';
/******************************************************************************/
const pendingResponses = new Map();
let worker = null;
let needLists = true;
let messageId = 1;
const onWorkerMessage = function(e) {
const msg = e.data;
const resolver = pendingResponses.get(msg.id);
pendingResponses.delete(msg.id);
resolver(msg.response);
};
const stopWorker = function() {
workerTTLTimer.off();
if ( worker === null ) { return; }
worker.terminate();
worker = null;
needLists = true;
for ( const resolver of pendingResponses.values() ) {
resolver();
}
pendingResponses.clear();
};
const workerTTLTimer = vAPI.defer.create(stopWorker);
const workerTTL = { min: 5 };
const initWorker = function() {
if ( worker === null ) {
worker = new Worker('js/reverselookup-worker.js');
worker.onmessage = onWorkerMessage;
}
// The worker will be shutdown after n minutes without being used.
workerTTLTimer.offon(workerTTL);
if ( needLists === false ) {
return Promise.resolve();
}
needLists = false;
const entries = new Map();
const onListLoaded = function(details) {
const entry = entries.get(details.assetKey);
// https://github.com/gorhill/uBlock/issues/536
// Use assetKey when there is no filter list title.
worker.postMessage({
what: 'setList',
details: {
assetKey: details.assetKey,
title: entry.title || details.assetKey,
supportURL: entry.supportURL,
content: details.content
}
});
};
for ( const listKey in µb.availableFilterLists ) {
if ( µb.availableFilterLists.hasOwnProperty(listKey) === false ) {
continue;
}
const entry = µb.availableFilterLists[listKey];
if ( entry.off === true ) { continue; }
entries.set(listKey, {
title: listKey !== µb.userFiltersPath ?
entry.title :
i18n$('1pPageName'),
supportURL: entry.supportURL || ''
});
}
if ( entries.size === 0 ) {
return Promise.resolve();
}
const promises = [];
for ( const listKey of entries.keys() ) {
promises.push(
µb.getCompiledFilterList(listKey).then(details => {
onListLoaded(details);
})
);
}
return Promise.all(promises);
};
const fromNetFilter = async function(rawFilter) {
if ( typeof rawFilter !== 'string' || rawFilter === '' ) { return; }
const writer = new CompiledListWriter();
const parser = new sfp.AstFilterParser({
trustedSource: true,
maxTokenLength: staticNetFilteringEngine.MAX_TOKEN_LENGTH,
nativeCssHas: vAPI.webextFlavor.env.includes('native_css_has'),
});
parser.parse(rawFilter);
const compiler = staticNetFilteringEngine.createCompiler();
if ( compiler.compile(parser, writer) === false ) { return; }
await initWorker();
const id = messageId++;
worker.postMessage({
what: 'fromNetFilter',
id,
compiledFilter: writer.last(),
rawFilter,
});
return new Promise(resolve => {
pendingResponses.set(id, resolve);
});
};
const fromExtendedFilter = async function(details) {
if (
typeof details.rawFilter !== 'string' ||
details.rawFilter === ''
) {
return;
}
await initWorker();
const id = messageId++;
const hostname = hostnameFromURI(details.url);
const parser = new sfp.AstFilterParser({
trustedSource: true,
nativeCssHas: vAPI.webextFlavor.env.includes('native_css_has'),
});
parser.parse(details.rawFilter);
let compiled;
if ( parser.isScriptletFilter() ) {
compiled = JSON.stringify(parser.getScriptletArgs());
}
worker.postMessage({
what: 'fromExtendedFilter',
id,
domain: domainFromHostname(hostname),
hostname,
ignoreGeneric:
staticNetFilteringEngine.matchRequestReverse(
'generichide',
details.url
) === 2,
ignoreSpecific:
staticNetFilteringEngine.matchRequestReverse(
'specifichide',
details.url
) === 2,
rawFilter: details.rawFilter,
compiled,
});
return new Promise(resolve => {
pendingResponses.set(id, resolve);
});
};
// This tells the worker that filter lists may have changed.
const resetLists = function() {
needLists = true;
if ( worker === null ) { return; }
worker.postMessage({ what: 'resetLists' });
};
/******************************************************************************/
const staticFilteringReverseLookup = {
fromNetFilter,
fromExtendedFilter,
resetLists,
shutdown: stopWorker
};
export default staticFilteringReverseLookup;
/******************************************************************************/
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