import { logger } from './logger' import { generateVideoTmpPath } from './utils' import * as WebTorrent from 'webtorrent' import { createWriteStream, remove } from 'fs-extra' import { CONFIG } from '../initializers' import { join } from 'path' function downloadWebTorrentVideo (target: { magnetUri: string, torrentName?: string }, timeout?: number) { const id = target.magnetUri || target.torrentName let timer const path = generateVideoTmpPath(id) logger.info('Importing torrent video %s', id) 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: CONFIG.STORAGE.VIDEOS_DIR } const torrent = webtorrent.add(torrentId, options, torrent => { if (torrent.files.length !== 1) { if (timer) clearTimeout(timer) return safeWebtorrentDestroy(webtorrent, torrentId, file.name, target.torrentName) .then(() => rej(new Error('Cannot import torrent ' + torrentId + ': there are multiple files in it'))) } file = torrent.files[ 0 ] const writeStream = createWriteStream(path) writeStream.on('finish', () => { if (timer) clearTimeout(timer) return safeWebtorrentDestroy(webtorrent, torrentId, file.name, target.torrentName) .then(() => res(path)) }) file.createReadStream().pipe(writeStream) }) torrent.on('error', err => rej(err)) if (timeout) { timer = setTimeout(async () => { return safeWebtorrentDestroy(webtorrent, torrentId, file ? file.name : undefined, target.torrentName) .then(() => rej(new Error('Webtorrent download timeout.'))) }, timeout) } }) } // --------------------------------------------------------------------------- export { downloadWebTorrentVideo } // --------------------------------------------------------------------------- function safeWebtorrentDestroy (webtorrent: WebTorrent.Instance, torrentId: string, filename?: string, torrentName?: string) { return new Promise(res => { webtorrent.destroy(err => { // Delete torrent file if (torrentName) { remove(torrentId) .catch(err => logger.error('Cannot remove torrent %s in webtorrent download.', torrentId, { err })) } // Delete downloaded file if (filename) { remove(join(CONFIG.STORAGE.VIDEOS_DIR, filename)) .catch(err => logger.error('Cannot remove torrent file %s in webtorrent download.', filename, { err })) } if (err) { logger.warn('Cannot destroy webtorrent in timeout.', { err }) } return res() }) }) }