uBlock/platform/mv3/make-rulesets.js

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/*******************************************************************************
uBlock Origin - a comprehensive, efficient content blocker
Copyright (C) 2022-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 fs from 'fs/promises';
import https from 'https';
import path from 'path';
import process from 'process';
import { createHash, randomBytes } from 'crypto';
import redirectResourcesMap from './js/redirect-resources.js';
import { dnrRulesetFromRawLists } from './js/static-dnr-filtering.js';
import * as sfp from './js/static-filtering-parser.js';
import * as makeScriptlet from './make-scriptlets.js';
import { safeReplace } from './safe-replace.js';
/******************************************************************************/
const commandLineArgs = (( ) => {
const args = new Map();
let name, value;
for ( const arg of process.argv.slice(2) ) {
const pos = arg.indexOf('=');
if ( pos === -1 ) {
name = arg;
value = '';
} else {
name = arg.slice(0, pos);
value = arg.slice(pos+1);
}
args.set(name, value);
}
return args;
})();
const platform = commandLineArgs.get('platform') || 'chromium';
const outputDir = commandLineArgs.get('output') || '.';
const cacheDir = `${outputDir}/../mv3-data`;
const rulesetDir = `${outputDir}/rulesets`;
const scriptletDir = `${rulesetDir}/scripting`;
const env = [
platform,
'mv3',
'ublock',
'ubol',
'user_stylesheet',
];
if ( platform !== 'firefox' ) {
env.push('native_css_has');
}
/******************************************************************************/
const jsonSetMapReplacer = (k, v) => {
if ( v instanceof Set || v instanceof Map ) {
if ( v.size === 0 ) { return; }
return Array.from(v);
}
return v;
};
const uidint32 = (s) => {
const h = createHash('sha256').update(s).digest('hex').slice(0,8);
return parseInt(h,16) & 0x7FFFFFFF;
};
const hnSort = (a, b) =>
a.split('.').reverse().join('.').localeCompare(
b.split('.').reverse().join('.')
);
/******************************************************************************/
const stdOutput = [];
const log = (text, silent = false) => {
stdOutput.push(text);
if ( silent === false ) {
console.log(text);
}
};
/******************************************************************************/
const urlToFileName = url => {
return url
.replace(/^https?:\/\//, '')
.replace(/\//g, '_')
;
};
const fetchText = (url, cacheDir) => {
return new Promise((resolve, reject) => {
const fname = urlToFileName(url);
fs.readFile(`${cacheDir}/${fname}`, { encoding: 'utf8' }).then(content => {
log(`\tFetched local ${url}`);
resolve({ url, content });
}).catch(( ) => {
log(`\tFetching remote ${url}`);
https.get(url, response => {
const data = [];
response.on('data', chunk => {
data.push(chunk.toString());
});
response.on('end', ( ) => {
const content = data.join('');
try {
writeFile(`${cacheDir}/${fname}`, content);
} catch (ex) {
}
resolve({ url, content });
});
}).on('error', error => {
reject(error);
});
});
});
};
/******************************************************************************/
const writeFile = async (fname, data) => {
const dir = path.dirname(fname);
await fs.mkdir(dir, { recursive: true });
const promise = fs.writeFile(fname, data);
writeOps.push(promise);
return promise;
};
const copyFile = async (from, to) => {
const dir = path.dirname(to);
await fs.mkdir(dir, { recursive: true });
const promise = fs.copyFile(from, to);
writeOps.push(promise);
return promise;
};
const writeOps = [];
/******************************************************************************/
const ruleResources = [];
const rulesetDetails = [];
const scriptletStats = new Map();
const genericDetails = new Map();
const requiredRedirectResources = new Set();
/******************************************************************************/
async function fetchList(assetDetails) {
// Remember fetched URLs
const fetchedURLs = new Set();
// Fetch list and expand `!#include` directives
let parts = assetDetails.urls.map(url => ({ url }));
while ( parts.every(v => typeof v === 'string') === false ) {
const newParts = [];
for ( const part of parts ) {
if ( typeof part === 'string' ) {
newParts.push(part);
continue;
}
if ( fetchedURLs.has(part.url) ) {
newParts.push('');
continue;
}
fetchedURLs.add(part.url);
if ( part.url.startsWith('https://ublockorigin.github.io/uAssets/filters/') ) {
newParts.push(`!#trusted on ${assetDetails.secret}`);
}
newParts.push(
fetchText(part.url, cacheDir).then(details => {
const { url } = details;
const content = details.content.trim();
if ( typeof content === 'string' && content !== '' ) {
if (
content.startsWith('<') === false ||
content.endsWith('>') === false
) {
return { url, content };
}
}
log(`No valid content for ${details.name}`);
return { url, content: '' };
})
);
newParts.push(`!#trusted off ${assetDetails.secret}`);
}
parts = await Promise.all(newParts);
parts = sfp.utils.preparser.expandIncludes(parts, env);
}
const text = parts.join('\n');
if ( text === '' ) {
log('No filterset found');
}
return text;
}
/******************************************************************************/
const isUnsupported = rule =>
rule._error !== undefined;
const isRegex = rule =>
rule.condition !== undefined &&
rule.condition.regexFilter !== undefined;
const isRedirect = rule => {
if ( rule.action === undefined ) { return false; }
if ( rule.action.type !== 'redirect' ) { return false; }
if ( rule.action.redirect?.extensionPath !== undefined ) { return true; }
if ( rule.action.redirect?.transform?.path !== undefined ) { return true; }
return false;
};
const isModifyHeaders = rule =>
rule.action !== undefined &&
rule.action.type === 'modifyHeaders';
const isRemoveparam = rule =>
rule.action !== undefined &&
rule.action.type === 'redirect' &&
rule.action.redirect.transform !== undefined;
const isGood = rule =>
isUnsupported(rule) === false &&
isRedirect(rule) === false &&
isModifyHeaders(rule) === false &&
isRemoveparam(rule) === false;
/******************************************************************************/
// Two distinct hostnames:
// www.example.com
// example.com
// Can be reduced to a single one:
// example.com
// Since if example.com matches, then www.example.com (or any other subdomain
// of example.com) will always match.
function pruneHostnameArray(hostnames) {
const rootMap = new Map();
for ( const hostname of hostnames ) {
const labels = hostname.split('.');
let currentMap = rootMap;
let i = labels.length;
while ( i-- ) {
const label = labels[i];
let nextMap = currentMap.get(label);
if ( nextMap === null ) { break; }
if ( nextMap === undefined ) {
if ( i === 0 ) {
currentMap.set(label, (nextMap = null));
} else {
currentMap.set(label, (nextMap = new Map()));
}
} else if ( i === 0 ) {
currentMap.set(label, null);
}
currentMap = nextMap;
}
}
const assemble = (currentMap, currentHostname, out) => {
for ( const [ label, nextMap ] of currentMap ) {
const nextHostname = currentHostname === ''
? label
: `${label}.${currentHostname}`;
if ( nextMap === null ) {
out.push(nextHostname);
} else {
assemble(nextMap, nextHostname, out);
}
}
return out;
};
return assemble(rootMap, '', []);
}
/*******************************************************************************
*
* For large rulesets, one rule per line for compromise between size and
* readability. This also means that the number of lines in resulting file
* representative of the number of rules in the ruleset.
*
* */
function toJSONRuleset(ruleset) {
const replacer = (k, v) => {
if ( k.startsWith('_') ) { return; }
if ( Array.isArray(v) ) {
return v.sort();
}
if ( v instanceof Object ) {
const sorted = {};
for ( const kk of Object.keys(v).sort() ) {
sorted[kk] = v[kk];
}
return sorted;
}
return v;
};
const indent = ruleset.length > 10 ? undefined : 1;
const out = [];
for ( const rule of ruleset ) {
out.push(JSON.stringify(rule, replacer, indent));
}
return `[\n${out.join(',\n')}\n]\n`;
}
/******************************************************************************/
async function processNetworkFilters(assetDetails, network) {
const { ruleset: rules } = network;
log(`Input filter count: ${network.filterCount}`);
log(`\tAccepted filter count: ${network.acceptedFilterCount}`);
log(`\tRejected filter count: ${network.rejectedFilterCount}`);
log(`Output rule count: ${rules.length}`);
// Minimize requestDomains arrays
for ( const rule of rules ) {
const condition = rule.condition;
if ( condition === undefined ) { continue; }
const requestDomains = condition.requestDomains;
if ( requestDomains === undefined ) { continue; }
const beforeCount = requestDomains.length;
condition.requestDomains = pruneHostnameArray(requestDomains);
const afterCount = condition.requestDomains.length;
if ( afterCount !== beforeCount ) {
log(`\tPruning requestDomains: from ${beforeCount} to ${afterCount}`);
}
}
// Add native DNR ruleset if present
if ( assetDetails.dnrURL ) {
const result = await fetchText(assetDetails.dnrURL, cacheDir);
for ( const rule of JSON.parse(result.content) ) {
rules.push(rule);
}
}
const plainGood = rules.filter(rule => isGood(rule) && isRegex(rule) === false);
log(`\tPlain good: ${plainGood.length}`);
log(plainGood
.filter(rule => Array.isArray(rule._warning))
.map(rule => rule._warning.map(v => `\t\t${v}`))
.join('\n'),
true
);
const regexes = rules.filter(rule => isGood(rule) && isRegex(rule));
log(`\tMaybe good (regexes): ${regexes.length}`);
const redirects = rules.filter(rule =>
isUnsupported(rule) === false &&
isRedirect(rule)
);
redirects.forEach(rule => {
if ( rule.action.redirect.extensionPath === undefined ) { return; }
requiredRedirectResources.add(
rule.action.redirect.extensionPath.replace(/^\/+/, '')
);
});
log(`\tredirect=: ${redirects.length}`);
const removeparamsGood = rules.filter(rule =>
isUnsupported(rule) === false && isRemoveparam(rule)
);
const removeparamsBad = rules.filter(rule =>
isUnsupported(rule) && isRemoveparam(rule)
);
log(`\tremoveparams= (accepted/discarded): ${removeparamsGood.length}/${removeparamsBad.length}`);
const modifyHeaders = rules.filter(rule =>
isUnsupported(rule) === false &&
isModifyHeaders(rule)
);
log(`\tmodifyHeaders=: ${modifyHeaders.length}`);
const bad = rules.filter(rule =>
isUnsupported(rule)
);
log(`\tUnsupported: ${bad.length}`);
log(bad.map(rule => rule._error.map(v => `\t\t${v}`)).join('\n'), true);
writeFile(
`${rulesetDir}/main/${assetDetails.id}.json`,
toJSONRuleset(plainGood)
);
if ( regexes.length !== 0 ) {
writeFile(
`${rulesetDir}/regex/${assetDetails.id}.json`,
toJSONRuleset(regexes)
);
}
if ( removeparamsGood.length !== 0 ) {
writeFile(
`${rulesetDir}/removeparam/${assetDetails.id}.json`,
toJSONRuleset(removeparamsGood)
);
}
if ( redirects.length !== 0 ) {
writeFile(
`${rulesetDir}/redirect/${assetDetails.id}.json`,
toJSONRuleset(redirects)
);
}
if ( modifyHeaders.length !== 0 ) {
writeFile(
`${rulesetDir}/modify-headers/${assetDetails.id}.json`,
toJSONRuleset(modifyHeaders)
);
}
return {
total: rules.length,
plain: plainGood.length,
discarded: removeparamsBad.length,
rejected: bad.length,
regex: regexes.length,
removeparam: removeparamsGood.length,
redirect: redirects.length,
modifyHeaders: modifyHeaders.length,
};
}
/******************************************************************************/
// TODO: unify css/scriptlet processing code since now css styles are
// injected using scriptlet injection.
// Load all available scriptlets into a key-val map, where the key is the
// scriptlet token, and val is the whole content of the file.
let scriptletsMapPromise;
function loadAllSourceScriptlets() {
if ( scriptletsMapPromise !== undefined ) {
return scriptletsMapPromise;
}
scriptletsMapPromise = fs.readdir('./scriptlets').then(files => {
const readTemplateFile = file =>
fs.readFile(`./scriptlets/${file}`, { encoding: 'utf8' })
.then(text => ({ file, text }));
const readPromises = [];
for ( const file of files ) {
readPromises.push(readTemplateFile(file));
}
return Promise.all(readPromises).then(results => {
const originalScriptletMap = new Map();
for ( const details of results ) {
originalScriptletMap.set(
details.file.replace('.template.js', '')
.replace('.template.css', ''),
details.text
);
}
return originalScriptletMap;
});
});
return scriptletsMapPromise;
}
/******************************************************************************/
async function processGenericCosmeticFilters(assetDetails, bucketsMap, exceptionSet) {
if ( bucketsMap === undefined ) { return 0; }
if ( exceptionSet ) {
for ( const [ hash, selectors ] of bucketsMap ) {
let i = selectors.length;
while ( i-- ) {
const selector = selectors[i];
if ( exceptionSet.has(selector) === false ) { continue; }
selectors.splice(i, 1);
//log(`\tRemoving excepted generic filter ##${selector}`);
}
if ( selectors.length === 0 ) {
bucketsMap.delete(hash);
}
}
}
if ( bucketsMap.size === 0 ) { return 0; }
const bucketsList = Array.from(bucketsMap);
const count = bucketsList.reduce((a, v) => a += v[1].length, 0);
if ( count === 0 ) { return 0; }
const selectorLists = bucketsList.map(v => [ v[0], v[1].join(',') ]);
const originalScriptletMap = await loadAllSourceScriptlets();
let patchedScriptlet = originalScriptletMap.get('css-generic').replace(
'$rulesetId$',
assetDetails.id
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$genericSelectorMap\$/,
`${JSON.stringify(selectorLists, scriptletJsonReplacer)}`
);
writeFile(
`${scriptletDir}/generic/${assetDetails.id}.js`,
patchedScriptlet
);
log(`CSS-generic: ${count} plain CSS selectors`);
return count;
}
/******************************************************************************/
async function processGenericHighCosmeticFilters(assetDetails, selectorSet, exceptionSet) {
if ( selectorSet === undefined ) { return 0; }
if ( exceptionSet ) {
for ( const selector of selectorSet ) {
if ( exceptionSet.has(selector) === false ) { continue; }
selectorSet.delete(selector);
//log(`\tRemoving excepted generic filter ##${selector}`);
}
}
if ( selectorSet.size === 0 ) { return 0; }
const selectorLists = Array.from(selectorSet).sort().join(',\n');
const originalScriptletMap = await loadAllSourceScriptlets();
let patchedScriptlet = originalScriptletMap.get('css-generichigh').replace(
'$rulesetId$',
assetDetails.id
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\$selectorList\$/,
selectorLists
);
writeFile(
`${scriptletDir}/generichigh/${assetDetails.id}.css`,
patchedScriptlet
);
log(`CSS-generic-high: ${selectorSet.size} plain CSS selectors`);
return selectorSet.size;
}
/******************************************************************************/
// This merges selectors which are used by the same hostnames
function groupSelectorsByHostnames(mapin) {
if ( mapin === undefined ) { return []; }
const merged = new Map();
for ( const [ selector, details ] of mapin ) {
if ( details.rejected ) { continue; }
const json = JSON.stringify(details);
let entries = merged.get(json);
if ( entries === undefined ) {
entries = new Set();
merged.set(json, entries);
}
entries.add(selector);
}
const out = [];
for ( const [ json, entries ] of merged ) {
const details = JSON.parse(json);
details.selectors = Array.from(entries).sort();
out.push(details);
}
return out;
}
// This merges hostnames which have the same set of selectors.
//
// Also, we sort the hostnames to increase likelihood that selector with
// same hostnames will end up in same generated scriptlet.
function groupHostnamesBySelectors(arrayin) {
const contentMap = new Map();
for ( const entry of arrayin ) {
const id = uidint32(JSON.stringify(entry.selectors));
let details = contentMap.get(id);
if ( details === undefined ) {
details = { a: entry.selectors };
contentMap.set(id, details);
}
if ( entry.matches !== undefined ) {
if ( details.y === undefined ) {
details.y = new Set();
}
for ( const hn of entry.matches ) {
details.y.add(hn);
}
}
if ( entry.excludeMatches !== undefined ) {
if ( details.n === undefined ) {
details.n = new Set();
}
for ( const hn of entry.excludeMatches ) {
details.n.add(hn);
}
}
}
const out = Array.from(contentMap).map(a => [
a[0], {
a: a[1].a,
y: a[1].y ? Array.from(a[1].y).sort(hnSort) : '*',
n: a[1].n ? Array.from(a[1].n) : undefined,
}
]).sort((a, b) => {
const ha = Array.isArray(a[1].y) ? a[1].y[0] : '*';
const hb = Array.isArray(b[1].y) ? b[1].y[0] : '*';
return hnSort(ha, hb);
});
return out;
}
const scriptletHostnameToIdMap = (hostnames, id, map) => {
for ( const hn of hostnames ) {
const existing = map.get(hn);
if ( existing === undefined ) {
map.set(hn, id);
} else if ( Array.isArray(existing) ) {
existing.push(id);
} else {
map.set(hn, [ existing, id ]);
}
}
};
const scriptletJsonReplacer = (k, v) => {
if ( k === 'n' ) {
if ( v === undefined || v.size === 0 ) { return; }
return Array.from(v);
}
if ( v instanceof Set || v instanceof Map ) {
if ( v.size === 0 ) { return; }
return Array.from(v);
}
return v;
};
/******************************************************************************/
function argsMap2List(argsMap, hostnamesMap) {
const argsList = [];
const indexMap = new Map();
for ( const [ id, details ] of argsMap ) {
indexMap.set(id, argsList.length);
argsList.push(details);
}
for ( const [ hn, ids ] of hostnamesMap ) {
if ( typeof ids === 'number' ) {
hostnamesMap.set(hn, indexMap.get(ids));
continue;
}
for ( let i = 0; i < ids.length; i++ ) {
ids[i] = indexMap.get(ids[i]);
}
}
return argsList;
}
/******************************************************************************/
async function processCosmeticFilters(assetDetails, mapin) {
if ( mapin === undefined ) { return 0; }
if ( mapin.size === 0 ) { return 0; }
const domainBasedEntries = groupHostnamesBySelectors(
groupSelectorsByHostnames(mapin)
);
// We do not want more than n CSS files per subscription, so we will
// group multiple unrelated selectors in the same file, and distinct
// css declarations will be injected programmatically according to the
// hostname of the current document.
//
// The cosmetic filters will be injected programmatically as content
// script and the decisions to activate the cosmetic filters will be
// done at injection time according to the document's hostname.
const generatedFiles = [];
const argsMap = domainBasedEntries.map(entry => [
entry[0],
{
a: entry[1].a ? entry[1].a.join(',\n') : undefined,
n: entry[1].n
}
]);
const hostnamesMap = new Map();
for ( const [ id, details ] of domainBasedEntries ) {
if ( details.y === undefined ) { continue; }
scriptletHostnameToIdMap(details.y, id, hostnamesMap);
}
const argsList = argsMap2List(argsMap, hostnamesMap);
const entitiesMap = new Map();
for ( const [ hn, details ] of hostnamesMap ) {
if ( hn.endsWith('.*') === false ) { continue; }
hostnamesMap.delete(hn);
entitiesMap.set(hn.slice(0, -2), details);
}
// Extract exceptions from argsList, simplify argsList entries
const exceptionsMap = new Map();
for ( let i = 0; i < argsList.length; i++ ) {
const details = argsList[i];
if ( details.n ) {
for ( const hn of details.n ) {
if ( exceptionsMap.has(hn) === false ) {
exceptionsMap.set(hn, []);
}
exceptionsMap.get(hn).push(i);
}
}
argsList[i] = details.a;
}
const originalScriptletMap = await loadAllSourceScriptlets();
let patchedScriptlet = originalScriptletMap.get('css-specific').replace(
'$rulesetId$',
assetDetails.id
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$argsList\$/,
`${JSON.stringify(argsList, scriptletJsonReplacer)}`
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$hostnamesMap\$/,
`${JSON.stringify(hostnamesMap, scriptletJsonReplacer)}`
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$entitiesMap\$/,
`${JSON.stringify(entitiesMap, scriptletJsonReplacer)}`
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$exceptionsMap\$/,
`${JSON.stringify(exceptionsMap, scriptletJsonReplacer)}`
);
writeFile(`${scriptletDir}/specific/${assetDetails.id}.js`, patchedScriptlet);
generatedFiles.push(`${assetDetails.id}`);
if ( generatedFiles.length !== 0 ) {
log(`CSS-specific: ${mapin.size} distinct filters`);
log(`\tCombined into ${hostnamesMap.size} distinct hostnames`);
log(`\tCombined into ${entitiesMap.size} distinct entities`);
}
return hostnamesMap.size + entitiesMap.size;
}
/******************************************************************************/
async function processDeclarativeCosmeticFilters(assetDetails, mapin) {
if ( mapin === undefined ) { return 0; }
if ( mapin.size === 0 ) { return 0; }
// Distinguish declarative-compiled-as-procedural from actual procedural.
const declaratives = new Map();
mapin.forEach((details, jsonSelector) => {
const selector = JSON.parse(jsonSelector);
if ( selector.cssable !== true ) { return; }
selector.cssable = undefined;
declaratives.set(JSON.stringify(selector), details);
});
if ( declaratives.size === 0 ) { return 0; }
const contentArray = groupHostnamesBySelectors(
groupSelectorsByHostnames(declaratives)
);
const argsMap = contentArray.map(entry => [
entry[0],
{
a: entry[1].a,
n: entry[1].n,
}
]);
const hostnamesMap = new Map();
for ( const [ id, details ] of contentArray ) {
if ( details.y === undefined ) { continue; }
scriptletHostnameToIdMap(details.y, id, hostnamesMap);
}
const argsList = argsMap2List(argsMap, hostnamesMap);
const entitiesMap = new Map();
for ( const [ hn, details ] of hostnamesMap ) {
if ( hn.endsWith('.*') === false ) { continue; }
hostnamesMap.delete(hn);
entitiesMap.set(hn.slice(0, -2), details);
}
// Extract exceptions from argsList, simplify argsList entries
const exceptionsMap = new Map();
for ( let i = 0; i < argsList.length; i++ ) {
const details = argsList[i];
if ( details.n ) {
for ( const hn of details.n ) {
if ( exceptionsMap.has(hn) === false ) {
exceptionsMap.set(hn, []);
}
exceptionsMap.get(hn).push(i);
}
}
argsList[i] = details.a;
}
const originalScriptletMap = await loadAllSourceScriptlets();
let patchedScriptlet = originalScriptletMap.get('css-declarative').replace(
'$rulesetId$',
assetDetails.id
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$argsList\$/,
`${JSON.stringify(argsList, scriptletJsonReplacer)}`
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$hostnamesMap\$/,
`${JSON.stringify(hostnamesMap, scriptletJsonReplacer)}`
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$entitiesMap\$/,
`${JSON.stringify(entitiesMap, scriptletJsonReplacer)}`
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$exceptionsMap\$/,
`${JSON.stringify(exceptionsMap, scriptletJsonReplacer)}`
);
writeFile(`${scriptletDir}/declarative/${assetDetails.id}.js`, patchedScriptlet);
if ( contentArray.length !== 0 ) {
log(`CSS-declarative: ${declaratives.size} distinct filters`);
log(`\tCombined into ${hostnamesMap.size} distinct hostnames`);
log(`\tCombined into ${entitiesMap.size} distinct entities`);
}
return hostnamesMap.size + entitiesMap.size;
}
/******************************************************************************/
async function processProceduralCosmeticFilters(assetDetails, mapin) {
if ( mapin === undefined ) { return 0; }
if ( mapin.size === 0 ) { return 0; }
// Distinguish declarative-compiled-as-procedural from actual procedural.
const procedurals = new Map();
mapin.forEach((details, jsonSelector) => {
const selector = JSON.parse(jsonSelector);
if ( selector.cssable ) { return; }
procedurals.set(jsonSelector, details);
});
if ( procedurals.size === 0 ) { return 0; }
const contentArray = groupHostnamesBySelectors(
groupSelectorsByHostnames(procedurals)
);
const argsMap = contentArray.map(entry => [
entry[0],
{
a: entry[1].a,
n: entry[1].n,
}
]);
const hostnamesMap = new Map();
for ( const [ id, details ] of contentArray ) {
if ( details.y === undefined ) { continue; }
scriptletHostnameToIdMap(details.y, id, hostnamesMap);
}
const argsList = argsMap2List(argsMap, hostnamesMap);
const entitiesMap = new Map();
for ( const [ hn, details ] of hostnamesMap ) {
if ( hn.endsWith('.*') === false ) { continue; }
hostnamesMap.delete(hn);
entitiesMap.set(hn.slice(0, -2), details);
}
// Extract exceptions from argsList, simplify argsList entries
const exceptionsMap = new Map();
for ( let i = 0; i < argsList.length; i++ ) {
const details = argsList[i];
if ( details.n ) {
for ( const hn of details.n ) {
if ( exceptionsMap.has(hn) === false ) {
exceptionsMap.set(hn, []);
}
exceptionsMap.get(hn).push(i);
}
}
argsList[i] = details.a;
}
const originalScriptletMap = await loadAllSourceScriptlets();
let patchedScriptlet = originalScriptletMap.get('css-procedural').replace(
'$rulesetId$',
assetDetails.id
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$argsList\$/,
`${JSON.stringify(argsList, scriptletJsonReplacer)}`
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$hostnamesMap\$/,
`${JSON.stringify(hostnamesMap, scriptletJsonReplacer)}`
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$entitiesMap\$/,
`${JSON.stringify(entitiesMap, scriptletJsonReplacer)}`
);
patchedScriptlet = safeReplace(patchedScriptlet,
/\bself\.\$exceptionsMap\$/,
`${JSON.stringify(exceptionsMap, scriptletJsonReplacer)}`
);
writeFile(`${scriptletDir}/procedural/${assetDetails.id}.js`, patchedScriptlet);
if ( contentArray.length !== 0 ) {
log(`Procedural-related distinct filters: ${procedurals.size} distinct combined selectors`);
log(`\tCombined into ${hostnamesMap.size} distinct hostnames`);
log(`\tCombined into ${entitiesMap.size} distinct entities`);
}
return hostnamesMap.size + entitiesMap.size;
}
/******************************************************************************/
async function processScriptletFilters(assetDetails, mapin) {
if ( mapin === undefined ) { return 0; }
if ( mapin.size === 0 ) { return 0; }
makeScriptlet.init();
for ( const details of mapin.values() ) {
makeScriptlet.compile(details);
}
const stats = await makeScriptlet.commit(
assetDetails.id,
`${scriptletDir}/scriptlet`,
writeFile
);
if ( stats.length !== 0 ) {
scriptletStats.set(assetDetails.id, stats);
}
makeScriptlet.reset();
return stats.length;
}
/******************************************************************************/
async function rulesetFromURLs(assetDetails) {
log('============================');
log(`Listset for '${assetDetails.id}':`);
if ( assetDetails.text === undefined ) {
const text = await fetchList(assetDetails);
if ( text === '' ) { return; }
assetDetails.text = text;
}
if ( Array.isArray(assetDetails.filters) ) {
assetDetails.text += '\n' + assetDetails.filters.join('\n');
}
const extensionPaths = [];
for ( const [ fname, details ] of redirectResourcesMap ) {
const path = `/web_accessible_resources/${fname}`;
extensionPaths.push([ fname, path ]);
if ( details.alias === undefined ) { continue; }
if ( typeof details.alias === 'string' ) {
extensionPaths.push([ details.alias, path ]);
continue;
}
if ( Array.isArray(details.alias) === false ) { continue; }
for ( const alias of details.alias ) {
extensionPaths.push([ alias, path ]);
}
}
const results = await dnrRulesetFromRawLists(
[ { name: assetDetails.id, text: assetDetails.text } ],
{ env, extensionPaths, secret: assetDetails.secret }
);
const netStats = await processNetworkFilters(
assetDetails,
results.network
);
// Split cosmetic filters into two groups: declarative and procedural
const declarativeCosmetic = new Map();
const proceduralCosmetic = new Map();
const rejectedCosmetic = [];
if ( results.specificCosmetic ) {
for ( const [ selector, details ] of results.specificCosmetic ) {
if ( details.rejected ) {
rejectedCosmetic.push(selector);
continue;
}
if ( selector.startsWith('{') === false ) {
declarativeCosmetic.set(selector, details);
continue;
}
const parsed = JSON.parse(selector);
parsed.raw = undefined;
proceduralCosmetic.set(JSON.stringify(parsed), details);
}
}
if ( rejectedCosmetic.length !== 0 ) {
log(`Rejected cosmetic filters: ${rejectedCosmetic.length}`);
log(rejectedCosmetic.map(line => `\t${line}`).join('\n'), true);
}
if (
Array.isArray(results.network.generichideExclusions) &&
results.network.generichideExclusions.length !== 0
) {
genericDetails.set(
assetDetails.id,
results.network.generichideExclusions.filter(hn => hn.endsWith('.*') === false).sort()
);
}
const genericCosmeticStats = await processGenericCosmeticFilters(
assetDetails,
results.genericCosmetic,
results.genericCosmeticExceptions
);
const genericHighCosmeticStats = await processGenericHighCosmeticFilters(
assetDetails,
results.genericHighCosmetic,
results.genericCosmeticExceptions
);
const specificCosmeticStats = await processCosmeticFilters(
assetDetails,
declarativeCosmetic
);
const declarativeStats = await processDeclarativeCosmeticFilters(
assetDetails,
proceduralCosmetic
);
const proceduralStats = await processProceduralCosmeticFilters(
assetDetails,
proceduralCosmetic
);
const scriptletStats = await processScriptletFilters(
assetDetails,
results.scriptlet
);
rulesetDetails.push({
id: assetDetails.id,
name: assetDetails.name,
group: assetDetails.group,
enabled: assetDetails.enabled,
lang: assetDetails.lang,
homeURL: assetDetails.homeURL,
filters: {
total: results.network.filterCount,
accepted: results.network.acceptedFilterCount,
rejected: results.network.rejectedFilterCount,
},
rules: {
total: netStats.total,
plain: netStats.plain,
regex: netStats.regex,
removeparam: netStats.removeparam,
redirect: netStats.redirect,
modifyHeaders: netStats.modifyHeaders,
discarded: netStats.discarded,
rejected: netStats.rejected,
},
css: {
generic: genericCosmeticStats,
generichigh: genericHighCosmeticStats,
specific: specificCosmeticStats,
declarative: declarativeStats,
procedural: proceduralStats,
},
scriptlets: scriptletStats,
});
ruleResources.push({
id: assetDetails.id,
enabled: assetDetails.enabled,
path: `/rulesets/main/${assetDetails.id}.json`
});
}
/******************************************************************************/
async function main() {
let version = '';
{
const now = new Date();
const yearPart = now.getUTCFullYear();
const monthPart = now.getUTCMonth() + 1;
const dayPart = now.getUTCDate();
const hourPart = Math.floor(now.getUTCHours());
const minutePart = Math.floor(now.getUTCMinutes());
version = `${yearPart}.${monthPart}.${dayPart}.${hourPart * 60 + minutePart}`;
}
log(`Version: ${version}`);
// Get assets.json content
const assets = await fs.readFile(
`./assets.json`,
{ encoding: 'utf8' }
).then(text =>
JSON.parse(text)
);
// This will be used to sign our inserted `!#trusted on` directives
const secret = createHash('sha256').update(randomBytes(16)).digest('hex').slice(0,16);
log(`Secret: ${secret}`);
// Assemble all default lists as the default ruleset
const contentURLs = [
'https://ublockorigin.github.io/uAssets/filters/filters.min.txt',
'https://ublockorigin.github.io/uAssets/filters/badware.min.txt',
'https://ublockorigin.github.io/uAssets/filters/privacy.min.txt',
'https://ublockorigin.github.io/uAssets/filters/unbreak.min.txt',
'https://ublockorigin.github.io/uAssets/filters/quick-fixes.min.txt',
'https://ublockorigin.github.io/uAssets/filters/ubol-filters.txt',
'https://ublockorigin.github.io/uAssets/thirdparties/easylist.txt',
'https://ublockorigin.github.io/uAssets/thirdparties/easyprivacy.txt',
'https://pgl.yoyo.org/adservers/serverlist.php?hostformat=hosts&showintro=1&mimetype=plaintext',
];
await rulesetFromURLs({
id: 'default',
name: 'Ads, trackers, miners, and more' ,
enabled: true,
secret,
urls: contentURLs,
dnrURL: 'https://ublockorigin.github.io/uAssets/dnr/default.json',
homeURL: 'https://github.com/uBlockOrigin/uAssets',
filters: [
],
});
// Regional rulesets
const excludedLists = [
'ara-0',
'EST-0',
];
// Merge lists which have same target languages
const langToListsMap = new Map();
for ( const [ id, asset ] of Object.entries(assets) ) {
if ( asset.content !== 'filters' ) { continue; }
if ( asset.off !== true ) { continue; }
if ( typeof asset.lang !== 'string' ) { continue; }
if ( excludedLists.includes(id) ) { continue; }
let ids = langToListsMap.get(asset.lang);
if ( ids === undefined ) {
langToListsMap.set(asset.lang, ids = []);
}
ids.push(id);
}
for ( const ids of langToListsMap.values() ) {
const urls = [];
for ( const id of ids ) {
const asset = assets[id];
const contentURL = Array.isArray(asset.contentURL)
? asset.contentURL[0]
: asset.contentURL;
urls.push(contentURL);
}
const id = ids[0];
const asset = assets[id];
await rulesetFromURLs({
id: id.toLowerCase(),
lang: asset.lang,
name: asset.title,
enabled: false,
urls,
homeURL: asset.supportURL,
});
}
// Handpicked rulesets from assets.json
const handpicked = [
'block-lan',
'dpollock-0',
'adguard-spyware-url',
];
for ( const id of handpicked ) {
const asset = assets[id];
if ( asset.content !== 'filters' ) { continue; }
const contentURL = Array.isArray(asset.contentURL)
? asset.contentURL[0]
: asset.contentURL;
await rulesetFromURLs({
id: id.toLowerCase(),
name: asset.title,
enabled: false,
urls: [ contentURL ],
homeURL: asset.supportURL,
});
}
// Handpicked annoyance rulesets from assets.json
await rulesetFromURLs({
id: 'annoyances-cookies',
name: 'EasyList/uBO Cookie Notices',
group: 'annoyances',
enabled: false,
secret,
urls: [
'https://ublockorigin.github.io/uAssets/thirdparties/easylist-cookies.txt',
'https://ublockorigin.github.io/uAssets/filters/annoyances-cookies.txt',
],
homeURL: 'https://github.com/easylist/easylist#fanboy-lists',
});
await rulesetFromURLs({
id: 'annoyances-overlays',
name: 'EasyList/uBO Overlay Notices',
group: 'annoyances',
enabled: false,
secret,
urls: [
'https://ublockorigin.github.io/uAssets/thirdparties/easylist-newsletters.txt',
'https://ublockorigin.github.io/uAssets/filters/annoyances-others.txt',
],
homeURL: 'https://github.com/easylist/easylist#fanboy-lists',
});
await rulesetFromURLs({
id: 'annoyances-social',
name: 'EasyList Social Widgets',
group: 'annoyances',
enabled: false,
urls: [
'https://ublockorigin.github.io/uAssets/thirdparties/easylist-social.txt',
],
homeURL: 'https://github.com/easylist/easylist#fanboy-lists',
});
await rulesetFromURLs({
id: 'annoyances-widgets',
name: 'EasyList Chat Widgets',
group: 'annoyances',
enabled: false,
urls: [
'https://ublockorigin.github.io/uAssets/thirdparties/easylist-chat.txt',
],
homeURL: 'https://github.com/easylist/easylist#fanboy-lists',
});
await rulesetFromURLs({
id: 'annoyances-others',
name: 'EasyList Other Annoyances',
group: 'annoyances',
enabled: false,
urls: [
'https://ublockorigin.github.io/uAssets/thirdparties/easylist-annoyances.txt'
],
homeURL: 'https://github.com/easylist/easylist#fanboy-lists',
});
// Handpicked rulesets from abroad
await rulesetFromURLs({
id: 'stevenblack-hosts',
name: 'Steven Blacks Unified Hosts (adware + malware)',
enabled: false,
urls: [ 'https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts' ],
homeURL: 'https://github.com/StevenBlack/hosts#readme',
});
writeFile(
`${rulesetDir}/ruleset-details.json`,
`${JSON.stringify(rulesetDetails, null, 1)}\n`
);
writeFile(
`${rulesetDir}/scriptlet-details.json`,
`${JSON.stringify(scriptletStats, jsonSetMapReplacer, 1)}\n`
);
writeFile(
`${rulesetDir}/generic-details.json`,
`${JSON.stringify(genericDetails, jsonSetMapReplacer, 1)}\n`
);
// Copy required redirect resources
for ( const path of requiredRedirectResources ) {
copyFile(`./${path}`, `${outputDir}/${path}`);
}
await Promise.all(writeOps);
// Patch manifest
// Get manifest content
const manifest = await fs.readFile(
`${outputDir}/manifest.json`,
{ encoding: 'utf8' }
).then(text =>
JSON.parse(text)
);
// Patch declarative_net_request key
manifest.declarative_net_request = { rule_resources: ruleResources };
// Patch web_accessible_resources key
const web_accessible_resources = {
resources: Array.from(requiredRedirectResources).map(path => `/${path}`),
matches: [ '<all_urls>' ],
};
if ( platform === 'chromium' ) {
web_accessible_resources.use_dynamic_url = true;
}
manifest.web_accessible_resources = [ web_accessible_resources ];
// Patch manifest version property
manifest.version = version;
// Commit changes
await fs.writeFile(
`${outputDir}/manifest.json`,
JSON.stringify(manifest, null, 2) + '\n'
);
// Log results
const logContent = stdOutput.join('\n') + '\n';
await fs.writeFile(`${cacheDir}/log.txt`, logContent);
}
main();
/******************************************************************************/