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MCP Browser Screenshot Server

fileUtil.tsโ€ข4.76 kB
/** * @license * Copyright 2023 Google Inc. * SPDX-License-Identifier: Apache-2.0 */ import type {ChildProcessByStdio} from 'node:child_process'; import {spawnSync, spawn} from 'node:child_process'; import {createReadStream} from 'node:fs'; import {mkdir, readdir} from 'node:fs/promises'; import * as path from 'node:path'; import type {Readable, Transform, Writable} from 'node:stream'; import {Stream} from 'node:stream'; import debug from 'debug'; const debugFileUtil = debug('puppeteer:browsers:fileUtil'); /** * @internal */ export async function unpackArchive( archivePath: string, folderPath: string, ): Promise<void> { if (!path.isAbsolute(folderPath)) { folderPath = path.resolve(process.cwd(), folderPath); } if (archivePath.endsWith('.zip')) { const extractZip = await import('extract-zip'); await extractZip.default(archivePath, {dir: folderPath}); } else if (archivePath.endsWith('.tar.bz2')) { await extractTar(archivePath, folderPath, 'bzip2'); } else if (archivePath.endsWith('.dmg')) { await mkdir(folderPath); await installDMG(archivePath, folderPath); } else if (archivePath.endsWith('.exe')) { // Firefox on Windows. const result = spawnSync(archivePath, [`/ExtractDir=${folderPath}`], { env: { __compat_layer: 'RunAsInvoker', }, }); if (result.status !== 0) { throw new Error( `Failed to extract ${archivePath} to ${folderPath}: ${result.output}`, ); } } else if (archivePath.endsWith('.tar.xz')) { await extractTar(archivePath, folderPath, 'xz'); } else { throw new Error(`Unsupported archive format: ${archivePath}`); } } function createTransformStream( child: ChildProcessByStdio<Writable, Readable, null>, ): Transform { const stream = new Stream.Transform({ transform(chunk, encoding, callback) { if (!child.stdin.write(chunk, encoding)) { child.stdin.once('drain', callback); } else { callback(); } }, flush(callback) { if (child.stdout.destroyed) { callback(); } else { child.stdin.end(); child.stdout.on('close', callback); } }, }); child.stdin.on('error', e => { if ('code' in e && e.code === 'EPIPE') { // finished before reading the file finished (i.e. head) stream.emit('end'); } else { stream.destroy(e); } }); child.stdout .on('data', data => { return stream.push(data); }) .on('error', e => { return stream.destroy(e); }); child.once('close', () => { return stream.end(); }); return stream; } /** * @internal */ export const internalConstantsForTesting = { xz: 'xz', bzip2: 'bzip2', }; /** * @internal */ async function extractTar( tarPath: string, folderPath: string, decompressUtilityName: keyof typeof internalConstantsForTesting, ): Promise<void> { const tarFs = await import('tar-fs'); return await new Promise<void>((fulfill, reject) => { function handleError(utilityName: string) { return (error: Error) => { if ('code' in error && error.code === 'ENOENT') { error = new Error( `\`${utilityName}\` utility is required to unpack this archive`, { cause: error, }, ); } reject(error); }; } const unpack = spawn( internalConstantsForTesting[decompressUtilityName], ['-d'], { stdio: ['pipe', 'pipe', 'inherit'], }, ) .once('error', handleError(decompressUtilityName)) .once('exit', code => { debugFileUtil(`${decompressUtilityName} exited, code=${code}`); }); const tar = tarFs.extract(folderPath); tar.once('error', handleError('tar')); tar.once('finish', fulfill); createReadStream(tarPath).pipe(createTransformStream(unpack)).pipe(tar); }); } /** * @internal */ async function installDMG(dmgPath: string, folderPath: string): Promise<void> { const {stdout} = spawnSync(`hdiutil`, [ 'attach', '-nobrowse', '-noautoopen', dmgPath, ]); const volumes = stdout.toString('utf8').match(/\/Volumes\/(.*)/m); if (!volumes) { throw new Error(`Could not find volume path in ${stdout}`); } const mountPath = volumes[0]!; try { const fileNames = await readdir(mountPath); const appName = fileNames.find(item => { return typeof item === 'string' && item.endsWith('.app'); }); if (!appName) { throw new Error(`Cannot find app in ${mountPath}`); } const mountedPath = path.join(mountPath!, appName); spawnSync('cp', ['-R', mountedPath, folderPath]); } finally { spawnSync('hdiutil', ['detach', mountPath, '-quiet']); } }

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