server/lib/schedulers/youtube-dl-update-scheduler.ts

   1 // Thanks: https://github.com/przemyslawpluta/node-youtube-dl/blob/master/lib/downloader.js
   2 // We rewrote it to avoid sync calls
   3
   4 import { AbstractScheduler } from './abstract-scheduler'
   5 import { SCHEDULER_INTERVALS_MS } from '../../initializers'
   6 import { logger } from '../../helpers/logger'
   7 import * as request from 'request'
   8 import { createWriteStream, writeFile } from 'fs'
   9 import { join } from 'path'
  10 import { mkdirpPromise, root } from '../../helpers/core-utils'
  11
  12 export class YoutubeDlUpdateScheduler extends AbstractScheduler {
  13
  14   private static instance: AbstractScheduler
  15
  16   protected schedulerIntervalMs = SCHEDULER_INTERVALS_MS.youtubeDLUpdate
  17
  18   private constructor () {
  19     super()
  20   }
  21
  22   async execute () {
  23     logger.info('Updating youtubeDL binary.')
  24
  25     const binDirectory = join(root(), 'node_modules', 'youtube-dl', 'bin')
  26     const bin = join(binDirectory, 'youtube-dl')
  27     const detailsPath = join(binDirectory, 'details')
  28     const url = 'https://yt-dl.org/downloads/latest/youtube-dl'
  29
  30     await mkdirpPromise(binDirectory)
  31
  32     return new Promise(res => {
  33       request.get(url, { followRedirect: false }, (err, result) => {
  34         if (err) {
  35           logger.error('Cannot update youtube-dl.', { err })
  36           return res()
  37         }
  38
  39         if (result.statusCode !== 302) {
  40           logger.error('youtube-dl update error: did not get redirect for the latest version link. Status %d', result.statusCode)
  41           return res()
  42         }
  43
  44         const url = result.headers.location
  45         const downloadFile = request.get(url)
  46         const newVersion = /yt-dl\.org\/downloads\/(\d{4}\.\d\d\.\d\d(\.\d)?)\/youtube-dl/.exec(url)[ 1 ]
  47
  48         downloadFile.on('response', result => {
  49           if (result.statusCode !== 200) {
  50             logger.error('Cannot update youtube-dl: new version response is not 200, it\'s %d.', result.statusCode)
  51             return res()
  52           }
  53
  54           downloadFile.pipe(createWriteStream(bin, { mode: 493 }))
  55         })
  56
  57         downloadFile.on('error', err => {
  58           logger.error('youtube-dl update error.', { err })
  59           return res()
  60         })
  61
  62         downloadFile.on('end', () => {
  63           const details = JSON.stringify({ version: newVersion, path: bin, exec: 'youtube-dl' })
  64           writeFile(detailsPath, details, { encoding: 'utf8' }, err => {
  65             if (err) {
  66               logger.error('youtube-dl update error: cannot write details.', { err })
  67               return res()
  68             }
  69
  70             logger.info('youtube-dl updated to version %s.', newVersion)
  71             return res()
  72           })
  73         })
  74       })
  75     })
  76   }
  77
  78   static get Instance () {
  79     return this.instance || (this.instance = new this())
  80   }
  81 }