server/helpers/webtorrent.ts

   1 import { logger } from './logger'
   2 import { generateVideoTmpPath } from './utils'
   3 import * as WebTorrent from 'webtorrent'
   4 import { createWriteStream } from 'fs'
   5 import { CONFIG } from '../initializers'
   6 import { join } from 'path'
   7 import { unlinkPromise } from './core-utils'
   8
   9 function downloadWebTorrentVideo (target: { magnetUri: string, torrentName: string }) {
  10   const id = target.magnetUri || target.torrentName
  11
  12   const path = generateVideoTmpPath(id)
  13   logger.info('Importing torrent video %s', id)
  14
  15   return new Promise<string>((res, rej) => {
  16     const webtorrent = new WebTorrent()
  17
  18     const torrentId = target.magnetUri || join(CONFIG.STORAGE.TORRENTS_DIR, target.torrentName)
  19
  20     const options = { path: CONFIG.STORAGE.VIDEOS_DIR }
  21     const torrent = webtorrent.add(torrentId, options, torrent => {
  22       if (torrent.files.length !== 1) return rej(new Error('The number of files is not equal to 1 for ' + torrentId))
  23
  24       const file = torrent.files[ 0 ]
  25
  26       const writeStream = createWriteStream(path)
  27       writeStream.on('finish', () => {
  28         webtorrent.destroy(async err => {
  29           if (err) return rej(err)
  30
  31           if (target.torrentName) {
  32             unlinkPromise(torrentId)
  33               .catch(err => logger.error('Cannot remove torrent %s in webtorrent download.', torrentId, { err }))
  34           }
  35
  36           unlinkPromise(join(CONFIG.STORAGE.VIDEOS_DIR, file.name))
  37             .catch(err => logger.error('Cannot remove torrent file %s in webtorrent download.', file.name, { err }))
  38
  39           res(path)
  40         })
  41       })
  42
  43       file.createReadStream().pipe(writeStream)
  44     })
  45
  46     torrent.on('error', err => rej(err))
  47   })
  48 }
  49
  50 // ---------------------------------------------------------------------------
  51
  52 export {
  53   downloadWebTorrentVideo
  54 }