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

   1 // Thanks: https://github.com/przemyslawpluta/node-youtube-dl/blob/master/lib/downloader.js
   2 // Use 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 { 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     const binDirectory = join(root(), 'node_modules', 'youtube-dl', 'bin')
  24     const bin = join(binDirectory, 'youtube-dl')
  25     const detailsPath = join(binDirectory, 'details')
  26     const url = 'https://yt-dl.org/downloads/latest/youtube-dl'
  27
  28     request.get(url, { followRedirect: false }, (err, res) => {
  29       if (err) {
  30         logger.error('Cannot update youtube-dl.', { err })
  31         return
  32       }
  33
  34       if (res.statusCode !== 302) {
  35         logger.error('youtube-dl update error: did not get redirect for the latest version link. Status %d', res.statusCode)
  36         return
  37       }
  38
  39       const url = res.headers.location
  40       const downloadFile = request.get(url)
  41       const newVersion = /yt-dl\.org\/downloads\/(\d{4}\.\d\d\.\d\d(\.\d)?)\/youtube-dl/.exec(url)[1]
  42
  43       downloadFile.on('response', res => {
  44         if (res.statusCode !== 200) {
  45           logger.error('Cannot update youtube-dl: new version response is not 200, it\'s %d.', res.statusCode)
  46           return
  47         }
  48
  49         downloadFile.pipe(createWriteStream(bin, { mode: 493 }))
  50       })
  51
  52       downloadFile.on('error', err => logger.error('youtube-dl update error.', { err }))
  53
  54       downloadFile.on('end', () => {
  55         const details = JSON.stringify({ version: newVersion, path: bin, exec: 'youtube-dl' })
  56         writeFile(detailsPath, details, { encoding: 'utf8' }, err => {
  57           if (err) {
  58             logger.error('youtube-dl update error: cannot write details.', { err })
  59             return
  60           }
  61
  62           logger.info('youtube-dl updated to version %s.', newVersion)
  63         })
  64       })
  65
  66     })
  67   }
  68
  69   static get Instance () {
  70     return this.instance || (this.instance = new this())
  71   }
  72 }