mirror of
https://github.com/advplyr/audiobookshelf.git
synced 2024-10-05 17:52:32 +02:00
380 lines
11 KiB
JavaScript
380 lines
11 KiB
JavaScript
const Path = require('path')
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const fs = require('../libs/fsExtra')
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const archiver = require('../libs/archiver')
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const workerThreads = require('worker_threads')
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const Logger = require('../Logger')
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const Download = require('../objects/Download')
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const filePerms = require('../utils/filePerms')
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const { getId } = require('../utils/index')
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const { writeConcatFile, writeMetadataFile } = require('../utils/ffmpegHelpers')
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const { getFileSize } = require('../utils/fileUtils')
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const TAG = 'DownloadManager'
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class DownloadManager {
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constructor(db) {
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this.db = db
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this.downloadDirPath = Path.join(global.MetadataPath, 'downloads')
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this.pendingDownloads = []
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this.downloads = []
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}
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getDownload(downloadId) {
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return this.downloads.find(d => d.id === downloadId)
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}
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async removeOrphanDownloads() {
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try {
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var dirs = await fs.readdir(this.downloadDirPath)
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if (!dirs || !dirs.length) return true
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await Promise.all(dirs.map(async (dirname) => {
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var fullPath = Path.join(this.downloadDirPath, dirname)
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Logger.info(`Removing Orphan Download ${dirname}`)
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return fs.remove(fullPath)
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}))
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return true
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} catch (error) {
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return false
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}
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}
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downloadSocketRequest(socket, payload) {
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var client = socket.sheepClient
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var audiobook = this.db.audiobooks.find(a => a.id === payload.audiobookId)
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var options = {
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...payload
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}
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delete options.audiobookId
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this.prepareDownload(client, audiobook, options)
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}
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removeSocketRequest(socket, downloadId) {
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var download = this.downloads.find(d => d.id === downloadId)
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if (!download) {
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Logger.error('Remove download request download not found ' + downloadId)
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return
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}
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this.removeDownload(download)
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}
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async prepareDownload(client, audiobook, options = {}) {
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var downloadId = getId('dl')
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var dlpath = Path.join(this.downloadDirPath, downloadId)
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Logger.info(`Start Download for ${audiobook.id} - DownloadId: ${downloadId} - ${dlpath}`)
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await fs.ensureDir(dlpath)
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var downloadType = options.type || 'singleAudio'
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delete options.type
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var fileext = null
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var audiobookDirname = Path.basename(audiobook.path)
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if (downloadType === 'singleAudio') {
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var audioFileType = options.audioFileType || '.m4b'
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delete options.audioFileType
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if (audioFileType === 'same') {
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var firstTrack = audiobook.tracks[0]
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audioFileType = firstTrack.ext
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}
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fileext = audioFileType
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} else if (downloadType === 'zip') {
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fileext = '.zip'
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}
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var filename = audiobookDirname + fileext
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var downloadData = {
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id: downloadId,
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audiobookId: audiobook.id,
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type: downloadType,
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options: options,
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dirpath: dlpath,
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fullPath: Path.join(dlpath, filename),
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filename,
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ext: fileext,
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userId: (client && client.user) ? client.user.id : null,
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socket: (client && client.socket) ? client.socket : null
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}
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var download = new Download()
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download.setData(downloadData)
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download.setTimeoutTimer(this.downloadTimedOut.bind(this))
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if (downloadData.socket) {
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downloadData.socket.emit('download_started', download.toJSON())
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}
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if (download.type === 'singleAudio') {
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this.processSingleAudioDownload(audiobook, download)
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} else if (download.type === 'zip') {
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this.processZipDownload(audiobook, download)
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}
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}
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async processZipDownload(audiobook, download) {
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this.pendingDownloads.push({
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id: download.id,
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download
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})
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Logger.info(`[DownloadManager] Processing Zip download ${download.fullPath}`)
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var success = await this.zipAudiobookDir(audiobook.fullPath, download.fullPath).then(() => {
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return true
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}).catch((error) => {
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Logger.error('[DownloadManager] Process Zip Failed', error)
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return false
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})
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this.sendResult(download, { success })
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}
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zipAudiobookDir(audiobookPath, downloadPath) {
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return new Promise((resolve, reject) => {
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// create a file to stream archive data to
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const output = fs.createWriteStream(downloadPath)
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const archive = archiver('zip', {
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zlib: { level: 9 } // Sets the compression level.
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})
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// listen for all archive data to be written
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// 'close' event is fired only when a file descriptor is involved
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output.on('close', () => {
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Logger.info(archive.pointer() + ' total bytes')
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Logger.debug('archiver has been finalized and the output file descriptor has closed.')
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resolve()
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})
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// This event is fired when the data source is drained no matter what was the data source.
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// It is not part of this library but rather from the NodeJS Stream API.
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// @see: https://nodejs.org/api/stream.html#stream_event_end
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output.on('end', () => {
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Logger.debug('Data has been drained')
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})
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// good practice to catch warnings (ie stat failures and other non-blocking errors)
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archive.on('warning', function (err) {
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if (err.code === 'ENOENT') {
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// log warning
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Logger.warn(`[DownloadManager] Archiver warning: ${err.message}`)
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} else {
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// throw error
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Logger.error(`[DownloadManager] Archiver error: ${err.message}`)
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// throw err
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reject(err)
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}
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})
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archive.on('error', function (err) {
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Logger.error(`[DownloadManager] Archiver error: ${err.message}`)
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reject(err)
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})
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// pipe archive data to the file
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archive.pipe(output)
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archive.directory(audiobookPath, false)
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archive.finalize()
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})
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}
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async processSingleAudioDownload(audiobook, download) {
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// If changing audio file type then encoding is needed
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var audioRequiresEncode = audiobook.tracks[0].ext !== download.ext
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var shouldIncludeCover = download.includeCover && audiobook.book.cover
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var firstTrackIsM4b = audiobook.tracks[0].ext.toLowerCase() === '.m4b'
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var isOneTrack = audiobook.tracks.length === 1
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const ffmpegInputs = []
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if (!isOneTrack) {
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var concatFilePath = Path.join(download.dirpath, 'files.txt')
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await writeConcatFile(audiobook.tracks, concatFilePath)
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ffmpegInputs.push({
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input: concatFilePath,
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options: ['-safe 0', '-f concat']
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})
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} else {
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ffmpegInputs.push({
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input: audiobook.tracks[0].fullPath,
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options: firstTrackIsM4b ? ['-f mp4'] : []
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})
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}
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const logLevel = process.env.NODE_ENV === 'production' ? 'error' : 'warning'
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var ffmpegOptions = [`-loglevel ${logLevel}`]
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var ffmpegOutputOptions = []
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if (audioRequiresEncode) {
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ffmpegOptions = ffmpegOptions.concat([
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'-map 0:a',
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'-acodec aac',
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'-ac 2',
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'-b:a 64k',
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'-id3v2_version 3'
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])
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} else {
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ffmpegOptions.push('-max_muxing_queue_size 1000')
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if (isOneTrack && firstTrackIsM4b && !shouldIncludeCover) {
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ffmpegOptions.push('-c copy')
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} else {
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ffmpegOptions.push('-c:a copy')
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}
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}
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if (download.ext === '.m4b') {
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Logger.info('Concat m4b\'s use -f mp4')
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ffmpegOutputOptions.push('-f mp4')
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}
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if (download.includeMetadata) {
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var metadataFilePath = Path.join(download.dirpath, 'metadata.txt')
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await writeMetadataFile(audiobook, metadataFilePath)
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ffmpegInputs.push({
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input: metadataFilePath
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})
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ffmpegOptions.push('-map_metadata 1')
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}
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if (shouldIncludeCover) {
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var _cover = audiobook.book.coverFullPath.replace(/\\/g, '/')
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ffmpegInputs.push({
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input: _cover,
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options: ['-f image2pipe']
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})
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ffmpegOptions.push('-vf [2:v]crop=trunc(iw/2)*2:trunc(ih/2)*2')
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ffmpegOptions.push('-map 2:v')
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}
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var workerData = {
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inputs: ffmpegInputs,
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options: ffmpegOptions,
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outputOptions: ffmpegOutputOptions,
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output: download.fullPath,
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}
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var worker = null
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try {
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var workerPath = Path.join(global.appRoot, 'server/utils/downloadWorker.js')
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worker = new workerThreads.Worker(workerPath, { workerData })
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} catch (error) {
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Logger.error(`[${TAG}] Start worker thread failed`, error)
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if (download.socket) {
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var downloadJson = download.toJSON()
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download.socket.emit('download_failed', downloadJson)
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}
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this.removeDownload(download)
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return
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}
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worker.on('message', (message) => {
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if (message != null && typeof message === 'object') {
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if (message.type === 'RESULT') {
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if (!download.isTimedOut) {
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this.sendResult(download, message)
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}
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} else if (message.type === 'FFMPEG') {
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if (Logger[message.level]) {
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Logger[message.level](message.log)
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}
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}
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} else {
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Logger.error('Invalid worker message', message)
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}
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})
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this.pendingDownloads.push({
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id: download.id,
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download,
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worker
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})
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}
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async downloadTimedOut(download) {
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Logger.info(`[DownloadManager] Download ${download.id} timed out (${download.timeoutTimeMs}ms)`)
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if (download.socket) {
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var downloadJson = download.toJSON()
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downloadJson.isTimedOut = true
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download.socket.emit('download_failed', downloadJson)
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}
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this.removeDownload(download)
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}
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async downloadExpired(download) {
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Logger.info(`[DownloadManager] Download ${download.id} expired`)
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if (download.socket) {
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download.socket.emit('download_expired', download.toJSON())
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}
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this.removeDownload(download)
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}
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async sendResult(download, result) {
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download.clearTimeoutTimer()
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// Remove pending download
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this.pendingDownloads = this.pendingDownloads.filter(d => d.id !== download.id)
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if (result.isKilled) {
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if (download.socket) {
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download.socket.emit('download_killed', download.toJSON())
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}
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return
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}
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if (!result.success) {
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if (download.socket) {
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download.socket.emit('download_failed', download.toJSON())
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}
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this.removeDownload(download)
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return
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}
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// Set file permissions and ownership
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await filePerms.setDefault(download.fullPath)
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var filesize = await getFileSize(download.fullPath)
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download.setComplete(filesize)
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if (download.socket) {
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download.socket.emit('download_ready', download.toJSON())
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}
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download.setExpirationTimer(this.downloadExpired.bind(this))
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this.downloads.push(download)
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Logger.info(`[DownloadManager] Download Ready ${download.id}`)
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}
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async removeDownload(download) {
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Logger.info('[DownloadManager] Removing download ' + download.id)
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download.clearTimeoutTimer()
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download.clearExpirationTimer()
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var pendingDl = this.pendingDownloads.find(d => d.id === download.id)
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if (pendingDl) {
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this.pendingDownloads = this.pendingDownloads.filter(d => d.id !== download.id)
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Logger.warn(`[DownloadManager] Removing download in progress - stopping worker`)
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if (pendingDl.worker) {
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try {
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pendingDl.worker.postMessage('STOP')
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} catch (error) {
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Logger.error('[DownloadManager] Error posting stop message to worker', error)
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}
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}
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}
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await fs.remove(download.dirpath).then(() => {
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Logger.info('[DownloadManager] Deleted download', download.dirpath)
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}).catch((err) => {
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Logger.error('[DownloadManager] Failed to delete download', err)
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})
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this.downloads = this.downloads.filter(d => d.id !== download.id)
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}
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}
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module.exports = DownloadManager |