752 lines
24 KiB
JavaScript
752 lines
24 KiB
JavaScript
'use strict';
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(function () {
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const asar = process._linkedBinding('electron_common_asar');
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const v8Util = process._linkedBinding('electron_common_v8_util');
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const { Buffer } = require('buffer');
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const Module = require('module');
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const path = require('path');
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const util = require('util');
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const Promise = global.Promise;
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const envNoAsar = process.env.ELECTRON_NO_ASAR &&
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process.type !== 'browser' &&
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process.type !== 'renderer';
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const isAsarDisabled = () => process.noAsar || envNoAsar;
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const internalBinding = process.internalBinding;
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delete process.internalBinding;
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/**
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* @param {!Function} functionToCall
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* @param {!Array|undefined} args
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*/
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const nextTick = (functionToCall, args = []) => {
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process.nextTick(() => functionToCall(...args));
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};
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// Cache asar archive objects.
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const cachedArchives = new Map();
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const getOrCreateArchive = archivePath => {
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const isCached = cachedArchives.has(archivePath);
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if (isCached) {
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return cachedArchives.get(archivePath);
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}
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const newArchive = asar.createArchive(archivePath);
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if (!newArchive) return null;
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cachedArchives.set(archivePath, newArchive);
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return newArchive;
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};
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// Separate asar package's path from full path.
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const splitPath = archivePathOrBuffer => {
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// Shortcut for disabled asar.
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if (isAsarDisabled()) return { isAsar: false };
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// Check for a bad argument type.
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let archivePath = archivePathOrBuffer;
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if (Buffer.isBuffer(archivePathOrBuffer)) {
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archivePath = archivePathOrBuffer.toString();
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}
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if (typeof archivePath !== 'string') return { isAsar: false };
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return asar.splitPath(path.normalize(archivePath));
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};
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// Convert asar archive's Stats object to fs's Stats object.
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let nextInode = 0;
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const uid = process.getuid != null ? process.getuid() : 0;
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const gid = process.getgid != null ? process.getgid() : 0;
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const fakeTime = new Date();
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const msec = (date) => (date || fakeTime).getTime();
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const asarStatsToFsStats = function (stats) {
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const { Stats, constants } = require('fs');
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let mode = constants.S_IROTH ^ constants.S_IRGRP ^ constants.S_IRUSR ^ constants.S_IWUSR;
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if (stats.isFile) {
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mode ^= constants.S_IFREG;
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} else if (stats.isDirectory) {
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mode ^= constants.S_IFDIR;
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} else if (stats.isLink) {
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mode ^= constants.S_IFLNK;
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}
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return new Stats(
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1, // dev
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mode, // mode
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1, // nlink
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uid,
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gid,
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0, // rdev
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undefined, // blksize
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++nextInode, // ino
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stats.size,
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undefined, // blocks,
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msec(stats.atime), // atim_msec
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msec(stats.mtime), // mtim_msec
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msec(stats.ctime), // ctim_msec
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msec(stats.birthtime) // birthtim_msec
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);
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};
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const AsarError = {
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NOT_FOUND: 'NOT_FOUND',
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NOT_DIR: 'NOT_DIR',
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NO_ACCESS: 'NO_ACCESS',
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INVALID_ARCHIVE: 'INVALID_ARCHIVE'
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};
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const createError = (errorType, { asarPath, filePath } = {}) => {
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let error;
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switch (errorType) {
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case AsarError.NOT_FOUND:
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error = new Error(`ENOENT, ${filePath} not found in ${asarPath}`);
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error.code = 'ENOENT';
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error.errno = -2;
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break;
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case AsarError.NOT_DIR:
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error = new Error('ENOTDIR, not a directory');
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error.code = 'ENOTDIR';
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error.errno = -20;
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break;
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case AsarError.NO_ACCESS:
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error = new Error(`EACCES: permission denied, access '${filePath}'`);
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error.code = 'EACCES';
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error.errno = -13;
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break;
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case AsarError.INVALID_ARCHIVE:
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error = new Error(`Invalid package ${asarPath}`);
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break;
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default:
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throw new Error(`Invalid error type "${errorType}" passed to createError.`);
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}
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return error;
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};
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const overrideAPISync = function (module, name, pathArgumentIndex, fromAsync) {
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if (pathArgumentIndex == null) pathArgumentIndex = 0;
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const old = module[name];
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const func = function () {
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const pathArgument = arguments[pathArgumentIndex];
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return old.apply(this, arguments);
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const archive = getOrCreateArchive(asarPath);
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if (!archive) throw createError(AsarError.INVALID_ARCHIVE, { asarPath });
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const newPath = archive.copyFileOut(filePath);
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if (!newPath) throw createError(AsarError.NOT_FOUND, { asarPath, filePath });
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arguments[pathArgumentIndex] = newPath;
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return old.apply(this, arguments);
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};
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if (fromAsync) {
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return func;
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}
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module[name] = func;
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};
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const overrideAPI = function (module, name, pathArgumentIndex) {
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if (pathArgumentIndex == null) pathArgumentIndex = 0;
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const old = module[name];
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module[name] = function () {
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const pathArgument = arguments[pathArgumentIndex];
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return old.apply(this, arguments);
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const callback = arguments[arguments.length - 1];
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if (typeof callback !== 'function') {
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return overrideAPISync(module, name, pathArgumentIndex, true).apply(this, arguments);
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}
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const archive = getOrCreateArchive(asarPath);
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if (!archive) {
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const error = createError(AsarError.INVALID_ARCHIVE, { asarPath });
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nextTick(callback, [error]);
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return;
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}
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const newPath = archive.copyFileOut(filePath);
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if (!newPath) {
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const error = createError(AsarError.NOT_FOUND, { asarPath, filePath });
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nextTick(callback, [error]);
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return;
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}
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arguments[pathArgumentIndex] = newPath;
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return old.apply(this, arguments);
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};
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if (old[util.promisify.custom]) {
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module[name][util.promisify.custom] = makePromiseFunction(old[util.promisify.custom], pathArgumentIndex);
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}
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if (module.promises && module.promises[name]) {
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module.promises[name] = makePromiseFunction(module.promises[name], pathArgumentIndex);
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}
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};
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const makePromiseFunction = function (orig, pathArgumentIndex) {
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return function (...args) {
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const pathArgument = args[pathArgumentIndex];
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return orig.apply(this, args);
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const archive = getOrCreateArchive(asarPath);
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if (!archive) {
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return Promise.reject(createError(AsarError.INVALID_ARCHIVE, { asarPath }));
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}
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const newPath = archive.copyFileOut(filePath);
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if (!newPath) {
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return Promise.reject(createError(AsarError.NOT_FOUND, { asarPath, filePath }));
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}
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args[pathArgumentIndex] = newPath;
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return orig.apply(this, args);
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};
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};
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// Override fs APIs.
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exports.wrapFsWithAsar = fs => {
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const logFDs = {};
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const logASARAccess = (asarPath, filePath, offset) => {
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if (!process.env.ELECTRON_LOG_ASAR_READS) return;
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if (!logFDs[asarPath]) {
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const path = require('path');
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const logFilename = `${path.basename(asarPath, '.asar')}-access-log.txt`;
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const logPath = path.join(require('os').tmpdir(), logFilename);
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logFDs[asarPath] = fs.openSync(logPath, 'a');
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}
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fs.writeSync(logFDs[asarPath], `${offset}: ${filePath}\n`);
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};
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const { lstatSync } = fs;
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fs.lstatSync = (pathArgument, options) => {
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return lstatSync(pathArgument, options);
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const archive = getOrCreateArchive(asarPath);
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if (!archive) throw createError(AsarError.INVALID_ARCHIVE, { asarPath });
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const stats = archive.stat(filePath);
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if (!stats) throw createError(AsarError.NOT_FOUND, { asarPath, filePath });
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return asarStatsToFsStats(stats);
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};
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const { lstat } = fs;
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fs.lstat = function (pathArgument, options, callback) {
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (typeof options === 'function') {
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callback = options;
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options = {};
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}
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if (!isAsar) return lstat(pathArgument, options, callback);
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const archive = getOrCreateArchive(asarPath);
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if (!archive) {
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const error = createError(AsarError.INVALID_ARCHIVE, { asarPath });
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nextTick(callback, [error]);
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return;
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}
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const stats = archive.stat(filePath);
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if (!stats) {
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const error = createError(AsarError.NOT_FOUND, { asarPath, filePath });
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nextTick(callback, [error]);
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return;
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}
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const fsStats = asarStatsToFsStats(stats);
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nextTick(callback, [null, fsStats]);
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};
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fs.promises.lstat = util.promisify(fs.lstat);
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const { statSync } = fs;
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fs.statSync = (pathArgument, options) => {
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const { isAsar } = splitPath(pathArgument);
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if (!isAsar) return statSync(pathArgument, options);
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// Do not distinguish links for now.
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return fs.lstatSync(pathArgument, options);
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};
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const { stat } = fs;
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fs.stat = (pathArgument, options, callback) => {
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const { isAsar } = splitPath(pathArgument);
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if (typeof options === 'function') {
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callback = options;
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options = {};
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}
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if (!isAsar) return stat(pathArgument, options, callback);
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// Do not distinguish links for now.
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process.nextTick(() => fs.lstat(pathArgument, options, callback));
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};
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fs.promises.stat = util.promisify(fs.stat);
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const wrapRealpathSync = function (realpathSync) {
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return function (pathArgument, options) {
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return realpathSync.apply(this, arguments);
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const archive = getOrCreateArchive(asarPath);
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if (!archive) {
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throw createError(AsarError.INVALID_ARCHIVE, { asarPath });
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}
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const fileRealPath = archive.realpath(filePath);
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if (fileRealPath === false) {
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throw createError(AsarError.NOT_FOUND, { asarPath, filePath });
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}
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return path.join(realpathSync(asarPath, options), fileRealPath);
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};
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};
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const { realpathSync } = fs;
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fs.realpathSync = wrapRealpathSync(realpathSync);
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fs.realpathSync.native = wrapRealpathSync(realpathSync.native);
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const wrapRealpath = function (realpath) {
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return function (pathArgument, options, callback) {
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return realpath.apply(this, arguments);
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if (arguments.length < 3) {
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callback = options;
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options = {};
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}
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const archive = getOrCreateArchive(asarPath);
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if (!archive) {
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const error = createError(AsarError.INVALID_ARCHIVE, { asarPath });
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nextTick(callback, [error]);
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return;
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}
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const fileRealPath = archive.realpath(filePath);
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if (fileRealPath === false) {
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const error = createError(AsarError.NOT_FOUND, { asarPath, filePath });
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nextTick(callback, [error]);
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return;
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}
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realpath(asarPath, options, (error, archiveRealPath) => {
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if (error === null) {
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const fullPath = path.join(archiveRealPath, fileRealPath);
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callback(null, fullPath);
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} else {
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callback(error);
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}
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});
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};
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};
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const { realpath } = fs;
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fs.realpath = wrapRealpath(realpath);
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fs.realpath.native = wrapRealpath(realpath.native);
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fs.promises.realpath = util.promisify(fs.realpath.native);
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const { exists } = fs;
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fs.exists = (pathArgument, callback) => {
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return exists(pathArgument, callback);
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const archive = getOrCreateArchive(asarPath);
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if (!archive) {
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const error = createError(AsarError.INVALID_ARCHIVE, { asarPath });
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nextTick(callback, [error]);
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return;
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}
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const pathExists = (archive.stat(filePath) !== false);
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nextTick(callback, [pathExists]);
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};
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fs.exists[util.promisify.custom] = pathArgument => {
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return exists[util.promisify.custom](pathArgument);
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const archive = getOrCreateArchive(asarPath);
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if (!archive) {
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const error = createError(AsarError.INVALID_ARCHIVE, { asarPath });
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return Promise.reject(error);
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}
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return Promise.resolve(archive.stat(filePath) !== false);
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};
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const { existsSync } = fs;
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fs.existsSync = pathArgument => {
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return existsSync(pathArgument);
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const archive = getOrCreateArchive(asarPath);
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if (!archive) return false;
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return archive.stat(filePath) !== false;
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};
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const { access } = fs;
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fs.access = function (pathArgument, mode, callback) {
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return access.apply(this, arguments);
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if (typeof mode === 'function') {
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callback = mode;
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mode = fs.constants.F_OK;
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}
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const archive = getOrCreateArchive(asarPath);
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if (!archive) {
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const error = createError(AsarError.INVALID_ARCHIVE, { asarPath });
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nextTick(callback, [error]);
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return;
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}
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const info = archive.getFileInfo(filePath);
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if (!info) {
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const error = createError(AsarError.NOT_FOUND, { asarPath, filePath });
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nextTick(callback, [error]);
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return;
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}
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if (info.unpacked) {
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const realPath = archive.copyFileOut(filePath);
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return fs.access(realPath, mode, callback);
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}
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const stats = archive.stat(filePath);
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if (!stats) {
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const error = createError(AsarError.NOT_FOUND, { asarPath, filePath });
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nextTick(callback, [error]);
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return;
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}
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if (mode & fs.constants.W_OK) {
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const error = createError(AsarError.NO_ACCESS, { asarPath, filePath });
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nextTick(callback, [error]);
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return;
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}
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nextTick(callback);
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};
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fs.promises.access = util.promisify(fs.access);
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const { accessSync } = fs;
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fs.accessSync = function (pathArgument, mode) {
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return accessSync.apply(this, arguments);
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if (mode == null) mode = fs.constants.F_OK;
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const archive = getOrCreateArchive(asarPath);
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if (!archive) {
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throw createError(AsarError.INVALID_ARCHIVE, { asarPath });
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}
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const info = archive.getFileInfo(filePath);
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if (!info) {
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throw createError(AsarError.NOT_FOUND, { asarPath, filePath });
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}
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if (info.unpacked) {
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const realPath = archive.copyFileOut(filePath);
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return fs.accessSync(realPath, mode);
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}
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const stats = archive.stat(filePath);
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if (!stats) {
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throw createError(AsarError.NOT_FOUND, { asarPath, filePath });
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}
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if (mode & fs.constants.W_OK) {
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throw createError(AsarError.NO_ACCESS, { asarPath, filePath });
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}
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};
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const { readFile } = fs;
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fs.readFile = function (pathArgument, options, callback) {
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const { isAsar, asarPath, filePath } = splitPath(pathArgument);
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if (!isAsar) return readFile.apply(this, arguments);
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if (typeof options === 'function') {
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callback = options;
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options = { encoding: null };
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} else if (typeof options === 'string') {
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options = { encoding: options };
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} else if (options === null || options === undefined) {
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options = { encoding: null };
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} else if (typeof options !== 'object') {
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throw new TypeError('Bad arguments');
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}
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const { encoding } = options;
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const archive = getOrCreateArchive(asarPath);
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if (!archive) {
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const error = createError(AsarError.INVALID_ARCHIVE, { asarPath });
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nextTick(callback, [error]);
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return;
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}
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const info = archive.getFileInfo(filePath);
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if (!info) {
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const error = createError(AsarError.NOT_FOUND, { asarPath, filePath });
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nextTick(callback, [error]);
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return;
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}
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if (info.size === 0) {
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nextTick(callback, [null, encoding ? '' : Buffer.alloc(0)]);
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return;
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}
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if (info.unpacked) {
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const realPath = archive.copyFileOut(filePath);
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return fs.readFile(realPath, options, callback);
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}
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const buffer = Buffer.alloc(info.size);
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const fd = archive.getFd();
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if (!(fd >= 0)) {
|
|
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath });
|
|
nextTick(callback, [error]);
|
|
return;
|
|
}
|
|
|
|
logASARAccess(asarPath, filePath, info.offset);
|
|
fs.read(fd, buffer, 0, info.size, info.offset, error => {
|
|
callback(error, encoding ? buffer.toString(encoding) : buffer);
|
|
});
|
|
};
|
|
|
|
fs.promises.readFile = util.promisify(fs.readFile);
|
|
|
|
const { readFileSync } = fs;
|
|
fs.readFileSync = function (pathArgument, options) {
|
|
const { isAsar, asarPath, filePath } = splitPath(pathArgument);
|
|
if (!isAsar) return readFileSync.apply(this, arguments);
|
|
|
|
const archive = getOrCreateArchive(asarPath);
|
|
if (!archive) throw createError(AsarError.INVALID_ARCHIVE, { asarPath });
|
|
|
|
const info = archive.getFileInfo(filePath);
|
|
if (!info) throw createError(AsarError.NOT_FOUND, { asarPath, filePath });
|
|
|
|
if (info.size === 0) return (options) ? '' : Buffer.alloc(0);
|
|
if (info.unpacked) {
|
|
const realPath = archive.copyFileOut(filePath);
|
|
return fs.readFileSync(realPath, options);
|
|
}
|
|
|
|
if (!options) {
|
|
options = { encoding: null };
|
|
} else if (typeof options === 'string') {
|
|
options = { encoding: options };
|
|
} else if (typeof options !== 'object') {
|
|
throw new TypeError('Bad arguments');
|
|
}
|
|
|
|
const { encoding } = options;
|
|
const buffer = Buffer.alloc(info.size);
|
|
const fd = archive.getFd();
|
|
if (!(fd >= 0)) throw createError(AsarError.NOT_FOUND, { asarPath, filePath });
|
|
|
|
logASARAccess(asarPath, filePath, info.offset);
|
|
fs.readSync(fd, buffer, 0, info.size, info.offset);
|
|
return (encoding) ? buffer.toString(encoding) : buffer;
|
|
};
|
|
|
|
const { readdir } = fs;
|
|
fs.readdir = function (pathArgument, options, callback) {
|
|
const { isAsar, asarPath, filePath } = splitPath(pathArgument);
|
|
if (typeof options === 'function') {
|
|
callback = options;
|
|
options = {};
|
|
}
|
|
if (!isAsar) return readdir.apply(this, arguments);
|
|
|
|
const archive = getOrCreateArchive(asarPath);
|
|
if (!archive) {
|
|
const error = createError(AsarError.INVALID_ARCHIVE, { asarPath });
|
|
nextTick(callback, [error]);
|
|
return;
|
|
}
|
|
|
|
const files = archive.readdir(filePath);
|
|
if (!files) {
|
|
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath });
|
|
nextTick(callback, [error]);
|
|
return;
|
|
}
|
|
|
|
nextTick(callback, [null, files]);
|
|
};
|
|
|
|
fs.promises.readdir = util.promisify(fs.readdir);
|
|
|
|
const { readdirSync } = fs;
|
|
fs.readdirSync = function (pathArgument, options) {
|
|
const { isAsar, asarPath, filePath } = splitPath(pathArgument);
|
|
if (!isAsar) return readdirSync.apply(this, arguments);
|
|
|
|
const archive = getOrCreateArchive(asarPath);
|
|
if (!archive) {
|
|
throw createError(AsarError.INVALID_ARCHIVE, { asarPath });
|
|
}
|
|
|
|
const files = archive.readdir(filePath);
|
|
if (!files) {
|
|
throw createError(AsarError.NOT_FOUND, { asarPath, filePath });
|
|
}
|
|
|
|
return files;
|
|
};
|
|
|
|
const { internalModuleReadJSON } = internalBinding('fs');
|
|
internalBinding('fs').internalModuleReadJSON = pathArgument => {
|
|
const { isAsar, asarPath, filePath } = splitPath(pathArgument);
|
|
if (!isAsar) return internalModuleReadJSON(pathArgument);
|
|
|
|
const archive = getOrCreateArchive(asarPath);
|
|
if (!archive) return;
|
|
|
|
const info = archive.getFileInfo(filePath);
|
|
if (!info) return;
|
|
if (info.size === 0) return '';
|
|
if (info.unpacked) {
|
|
const realPath = archive.copyFileOut(filePath);
|
|
return fs.readFileSync(realPath, { encoding: 'utf8' });
|
|
}
|
|
|
|
const buffer = Buffer.alloc(info.size);
|
|
const fd = archive.getFd();
|
|
if (!(fd >= 0)) return;
|
|
|
|
logASARAccess(asarPath, filePath, info.offset);
|
|
fs.readSync(fd, buffer, 0, info.size, info.offset);
|
|
return buffer.toString('utf8');
|
|
};
|
|
|
|
const { internalModuleStat } = internalBinding('fs');
|
|
internalBinding('fs').internalModuleStat = pathArgument => {
|
|
const { isAsar, asarPath, filePath } = splitPath(pathArgument);
|
|
if (!isAsar) return internalModuleStat(pathArgument);
|
|
|
|
// -ENOENT
|
|
const archive = getOrCreateArchive(asarPath);
|
|
if (!archive) return -34;
|
|
|
|
// -ENOENT
|
|
const stats = archive.stat(filePath);
|
|
if (!stats) return -34;
|
|
|
|
return (stats.isDirectory) ? 1 : 0;
|
|
};
|
|
|
|
// Calling mkdir for directory inside asar archive should throw ENOTDIR
|
|
// error, but on Windows it throws ENOENT.
|
|
if (process.platform === 'win32') {
|
|
const { mkdir } = fs;
|
|
fs.mkdir = (pathArgument, options, callback) => {
|
|
if (typeof options === 'function') {
|
|
callback = options;
|
|
options = {};
|
|
}
|
|
|
|
const { isAsar, filePath } = splitPath(pathArgument);
|
|
if (isAsar && filePath.length > 0) {
|
|
const error = createError(AsarError.NOT_DIR);
|
|
nextTick(callback, [error]);
|
|
return;
|
|
}
|
|
|
|
mkdir(pathArgument, options, callback);
|
|
};
|
|
|
|
fs.promises.mkdir = util.promisify(fs.mkdir);
|
|
|
|
const { mkdirSync } = fs;
|
|
fs.mkdirSync = function (pathArgument, options) {
|
|
const { isAsar, filePath } = splitPath(pathArgument);
|
|
if (isAsar && filePath.length) throw createError(AsarError.NOT_DIR);
|
|
return mkdirSync(pathArgument, options);
|
|
};
|
|
}
|
|
|
|
function invokeWithNoAsar (func) {
|
|
return function () {
|
|
const processNoAsarOriginalValue = process.noAsar;
|
|
process.noAsar = true;
|
|
try {
|
|
return func.apply(this, arguments);
|
|
} finally {
|
|
process.noAsar = processNoAsarOriginalValue;
|
|
}
|
|
};
|
|
}
|
|
|
|
// Strictly implementing the flags of fs.copyFile is hard, just do a simple
|
|
// implementation for now. Doing 2 copies won't spend much time more as OS
|
|
// has filesystem caching.
|
|
overrideAPI(fs, 'copyFile');
|
|
overrideAPISync(fs, 'copyFileSync');
|
|
|
|
overrideAPI(fs, 'open');
|
|
overrideAPISync(process, 'dlopen', 1);
|
|
overrideAPISync(Module._extensions, '.node', 1);
|
|
overrideAPISync(fs, 'openSync');
|
|
|
|
const overrideChildProcess = (childProcess) => {
|
|
// Executing a command string containing a path to an asar archive
|
|
// confuses `childProcess.execFile`, which is internally called by
|
|
// `childProcess.{exec,execSync}`, causing Electron to consider the full
|
|
// command as a single path to an archive.
|
|
const { exec, execSync } = childProcess;
|
|
childProcess.exec = invokeWithNoAsar(exec);
|
|
childProcess.exec[util.promisify.custom] = invokeWithNoAsar(exec[util.promisify.custom]);
|
|
childProcess.execSync = invokeWithNoAsar(execSync);
|
|
|
|
overrideAPI(childProcess, 'execFile');
|
|
overrideAPISync(childProcess, 'execFileSync');
|
|
};
|
|
|
|
// Lazily override the child_process APIs only when child_process is
|
|
// fetched the first time. We will eagerly override the child_process APIs
|
|
// when this env var is set so that stack traces generated inside node unit
|
|
// tests will match. This env var will only slow things down in users apps
|
|
// and should not be used.
|
|
if (process.env.ELECTRON_EAGER_ASAR_HOOK_FOR_TESTING) {
|
|
overrideChildProcess(require('child_process'));
|
|
} else {
|
|
const originalModuleLoad = Module._load;
|
|
Module._load = (request, ...args) => {
|
|
const loadResult = originalModuleLoad(request, ...args);
|
|
if (request === 'child_process') {
|
|
if (!v8Util.getHiddenValue(loadResult, 'asar-ready')) {
|
|
v8Util.setHiddenValue(loadResult, 'asar-ready', true);
|
|
// Just to make it obvious what we are dealing with here
|
|
const childProcess = loadResult;
|
|
|
|
overrideChildProcess(childProcess);
|
|
}
|
|
}
|
|
return loadResult;
|
|
};
|
|
}
|
|
};
|
|
})();
|