import { logger } from './logger' import { generateVideoImportTmpPath } from './utils' import * as WebTorrent from 'webtorrent' import { createWriteStream, ensureDir, remove } from 'fs-extra' import { CONFIG } from '../initializers/config' import { dirname, join } from 'path' async function downloadWebTorrentVideo (target: { magnetUri: string, torrentName?: string }, timeout: number) { const id = target.magnetUri || target.torrentName let timer const path = generateVideoImportTmpPath(id) logger.info('Importing torrent video %s', id) const directoryPath = join(CONFIG.STORAGE.TMP_DIR, 'webtorrent') await ensureDir(directoryPath) return new Promise((res, rej) => { const webtorrent = new WebTorrent() let file: WebTorrent.TorrentFile const torrentId = target.magnetUri || join(CONFIG.STORAGE.TORRENTS_DIR, target.torrentName) const options = { path: directoryPath } const torrent = webtorrent.add(torrentId, options, torrent => { if (torrent.files.length !== 1) { if (timer) clearTimeout(timer) for (let file of torrent.files) { deleteDownloadedFile({ directoryPath, filepath: file.path }) } return safeWebtorrentDestroy(webtorrent, torrentId, undefined, target.torrentName) .then(() => rej(new Error('Cannot import torrent ' + torrentId + ': there are multiple files in it'))) } file = torrent.files[ 0 ] // FIXME: avoid creating another stream when https://github.com/webtorrent/webtorrent/issues/1517 is fixed const writeStream = createWriteStream(path) writeStream.on('finish', () => { if (timer) clearTimeout(timer) return safeWebtorrentDestroy(webtorrent, torrentId, { directoryPath, filepath: file.path }, target.torrentName) .then(() => res(path)) }) file.createReadStream().pipe(writeStream) }) torrent.on('error', err => rej(err)) timer = setTimeout(async () => { return safeWebtorrentDestroy(webtorrent, torrentId, file ? { directoryPath, filepath: file.path } : undefined, target.torrentName) .then(() => rej(new Error('Webtorrent download timeout.'))) }, timeout) }) } // --------------------------------------------------------------------------- export { downloadWebTorrentVideo } // --------------------------------------------------------------------------- function safeWebtorrentDestroy ( webtorrent: WebTorrent.Instance, torrentId: string, downloadedFile?: { directoryPath: string, filepath: string }, torrentName?: string ) { return new Promise(res => { webtorrent.destroy(err => { // Delete torrent file if (torrentName) { logger.debug('Removing %s torrent after webtorrent download.', torrentId) remove(torrentId) .catch(err => logger.error('Cannot remove torrent %s in webtorrent download.', torrentId, { err })) } // Delete downloaded file if (downloadedFile) deleteDownloadedFile(downloadedFile) if (err) logger.warn('Cannot destroy webtorrent in timeout.', { err }) return res() }) }) } function deleteDownloadedFile (downloadedFile: { directoryPath: string, filepath: string }) { // We want to delete the base directory let pathToDelete = dirname(downloadedFile.filepath) if (pathToDelete === '.') pathToDelete = downloadedFile.filepath const toRemovePath = join(downloadedFile.directoryPath, pathToDelete) logger.debug('Removing %s after webtorrent download.', toRemovePath) remove(toRemovePath) .catch(err => logger.error('Cannot remove torrent file %s in webtorrent download.', toRemovePath, { err })) }