mirror of
https://github.com/advplyr/audiobookshelf.git
synced 2024-10-05 17:52:32 +02:00
312 lines
11 KiB
JavaScript
312 lines
11 KiB
JavaScript
const Path = require('path')
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const cron = require('../libs/nodeCron')
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const fs = require('fs-extra')
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const archiver = require('archiver')
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const StreamZip = require('node-stream-zip')
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// Utils
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const { getFileSize } = require('../utils/fileUtils')
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const filePerms = require('../utils/filePerms')
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const Logger = require('../Logger')
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const Backup = require('../objects/Backup')
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class BackupManager {
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constructor(db, emitter) {
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this.BackupPath = Path.join(global.MetadataPath, 'backups')
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this.ItemsMetadataPath = Path.join(global.MetadataPath, 'items')
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this.db = db
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this.emitter = emitter
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this.scheduleTask = null
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this.backups = []
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}
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get serverSettings() {
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return this.db.serverSettings || {}
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}
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async init() {
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var backupsDirExists = await fs.pathExists(this.BackupPath)
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if (!backupsDirExists) {
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await fs.ensureDir(this.BackupPath)
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await filePerms.setDefault(this.BackupPath)
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}
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await this.loadBackups()
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this.scheduleCron()
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}
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scheduleCron() {
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if (!this.serverSettings.backupSchedule) {
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Logger.info(`[BackupManager] Auto Backups are disabled`)
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return
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}
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try {
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var cronSchedule = this.serverSettings.backupSchedule
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this.scheduleTask = cron.schedule(cronSchedule, this.runBackup.bind(this))
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} catch (error) {
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Logger.error(`[BackupManager] Failed to schedule backup cron ${this.serverSettings.backupSchedule}`, error)
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}
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}
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updateCronSchedule() {
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if (this.scheduleTask && !this.serverSettings.backupSchedule) {
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Logger.info(`[BackupManager] Disabling backup schedule`)
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if (this.scheduleTask.destroy) this.scheduleTask.destroy()
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this.scheduleTask = null
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} else if (!this.scheduleTask && this.serverSettings.backupSchedule) {
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Logger.info(`[BackupManager] Starting backup schedule ${this.serverSettings.backupSchedule}`)
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this.scheduleCron()
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} else if (this.serverSettings.backupSchedule) {
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Logger.info(`[BackupManager] Restarting backup schedule ${this.serverSettings.backupSchedule}`)
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if (this.scheduleTask.destroy) this.scheduleTask.destroy()
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this.scheduleCron()
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}
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}
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async uploadBackup(req, res) {
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var backupFile = req.files.file
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if (Path.extname(backupFile.name) !== '.audiobookshelf') {
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Logger.error(`[BackupManager] Invalid backup file uploaded "${backupFile.name}"`)
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return res.status(500).send('Invalid backup file')
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}
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var tempPath = Path.join(this.BackupPath, backupFile.name)
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var success = await backupFile.mv(tempPath).then(() => true).catch((error) => {
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Logger.error('[BackupManager] Failed to move backup file', path, error)
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return false
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})
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if (!success) {
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return res.status(500).send('Failed to move backup file into backups directory')
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}
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const zip = new StreamZip.async({ file: tempPath })
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const data = await zip.entryData('details')
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var details = data.toString('utf8').split('\n')
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var backup = new Backup({ details, fullPath: tempPath })
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if (!backup.serverVersion) {
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Logger.error(`[BackupManager] Invalid backup with no server version - might be a backup created before version 2.0.0`)
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return res.status(500).send('Invalid backup. Might be a backup created before version 2.0.0.')
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}
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backup.fileSize = await getFileSize(backup.fullPath)
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var existingBackupIndex = this.backups.findIndex(b => b.id === backup.id)
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if (existingBackupIndex >= 0) {
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Logger.warn(`[BackupManager] Backup already exists with id ${backup.id} - overwriting`)
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this.backups.splice(existingBackupIndex, 1, backup)
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} else {
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this.backups.push(backup)
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}
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return res.json(this.backups.map(b => b.toJSON()))
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}
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async requestCreateBackup(res) {
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var backupSuccess = await this.runBackup()
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if (backupSuccess) res.json(this.backups.map(b => b.toJSON()))
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else res.sendStatus(500)
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}
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async requestApplyBackup(backup) {
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const zip = new StreamZip.async({ file: backup.fullPath })
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await zip.extract('config/', global.ConfigPath)
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if (backup.backupMetadataCovers) {
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await zip.extract('metadata-items/', this.ItemsMetadataPath)
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}
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await this.db.reinit()
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this.emitter('backup_applied')
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}
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async loadBackups() {
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try {
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var filesInDir = await fs.readdir(this.BackupPath)
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for (let i = 0; i < filesInDir.length; i++) {
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var filename = filesInDir[i]
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if (filename.endsWith('.audiobookshelf')) {
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var fullFilePath = Path.join(this.BackupPath, filename)
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let zip = null
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let data = null
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try {
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zip = new StreamZip.async({ file: fullFilePath })
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data = await zip.entryData('details')
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} catch (error) {
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if (error.message === "Bad archive") {
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Logger.warn(`[BackupManager] Backup appears to be corrupted: ${fullFilePath}`)
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continue;
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} else if (error.message === "unexpected end of file") {
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Logger.warn(`[BackupManager] Backup appears to be corrupted: ${fullFilePath}`)
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continue;
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} else {
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throw error
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}
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}
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var details = data.toString('utf8').split('\n')
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var backup = new Backup({ details, fullPath: fullFilePath })
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if (!backup.serverVersion) {
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Logger.error(`[BackupManager] Old unsupported backup was found "${backup.fullPath}"`)
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}
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backup.fileSize = await getFileSize(backup.fullPath)
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var existingBackupWithId = this.backups.find(b => b.id === backup.id)
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if (existingBackupWithId) {
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Logger.warn(`[BackupManager] Backup already loaded with id ${backup.id} - ignoring`)
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} else {
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this.backups.push(backup)
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}
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Logger.debug(`[BackupManager] Backup found "${backup.id}"`)
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zip.close()
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}
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}
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Logger.info(`[BackupManager] ${this.backups.length} Backups Found`)
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} catch (error) {
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Logger.error('[BackupManager] Failed to load backups', error)
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}
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}
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async runBackup() {
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// Check if Metadata Path is inside Config Path (otherwise there will be an infinite loop as the archiver tries to zip itself)
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Logger.info(`[BackupManager] Running Backup`)
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var metadataItemsPath = this.serverSettings.backupMetadataCovers ? this.ItemsMetadataPath : null
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var newBackup = new Backup()
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const newBackData = {
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backupMetadataCovers: this.serverSettings.backupMetadataCovers,
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backupDirPath: this.BackupPath
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}
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newBackup.setData(newBackData)
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var zipResult = await this.zipBackup(metadataItemsPath, newBackup).then(() => true).catch((error) => {
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Logger.error(`[BackupManager] Backup Failed ${error}`)
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return false
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})
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if (zipResult) {
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Logger.info(`[BackupManager] Backup successful ${newBackup.id}`)
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await filePerms.setDefault(newBackup.fullPath)
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newBackup.fileSize = await getFileSize(newBackup.fullPath)
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var existingIndex = this.backups.findIndex(b => b.id === newBackup.id)
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if (existingIndex >= 0) {
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this.backups.splice(existingIndex, 1, newBackup)
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} else {
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this.backups.push(newBackup)
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}
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// Check remove oldest backup
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if (this.backups.length > this.serverSettings.backupsToKeep) {
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this.backups.sort((a, b) => a.createdAt - b.createdAt)
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var oldBackup = this.backups.shift()
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Logger.debug(`[BackupManager] Removing old backup ${oldBackup.id}`)
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this.removeBackup(oldBackup)
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}
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return true
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} else {
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return false
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}
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}
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async removeBackup(backup) {
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try {
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Logger.debug(`[BackupManager] Removing Backup "${backup.fullPath}"`)
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await fs.remove(backup.fullPath)
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this.backups = this.backups.filter(b => b.id !== backup.id)
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Logger.info(`[BackupManager] Backup "${backup.id}" Removed`)
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} catch (error) {
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Logger.error(`[BackupManager] Failed to remove backup`, error)
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}
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}
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zipBackup(metadataItemsPath, backup) {
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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(backup.fullPath)
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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('[BackupManager]', archive.pointer() + ' total bytes')
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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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output.on('finish', () => {
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Logger.debug('Write Stream Finished')
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})
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output.on('error', (err) => {
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Logger.debug('Write Stream Error', err)
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reject(err)
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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(`[BackupManager] Archiver warning: ${err.message}`)
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} else {
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// throw error
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Logger.error(`[BackupManager] 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(`[BackupManager] Archiver error: ${err.message}`)
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reject(err)
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})
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archive.on('progress', ({ fs: fsobj }) => {
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const maxBackupSizeInBytes = this.serverSettings.maxBackupSize * 1000 * 1000 * 1000
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if (fsobj.processedBytes > maxBackupSizeInBytes) {
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Logger.error(`[BackupManager] Archiver is too large - aborting to prevent endless loop, Bytes Processed: ${fsobj.processedBytes}`)
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archive.abort()
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setTimeout(() => {
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this.removeBackup(backup)
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output.destroy('Backup too large') // Promise is reject in write stream error evt
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}, 500)
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}
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})
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// pipe archive data to the file
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archive.pipe(output)
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archive.directory(this.db.LibraryItemsPath, 'config/libraryItems')
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archive.directory(this.db.UsersPath, 'config/users')
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archive.directory(this.db.SessionsPath, 'config/sessions')
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archive.directory(this.db.LibrariesPath, 'config/libraries')
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archive.directory(this.db.SettingsPath, 'config/settings')
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archive.directory(this.db.CollectionsPath, 'config/collections')
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archive.directory(this.db.AuthorsPath, 'config/authors')
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archive.directory(this.db.SeriesPath, 'config/series')
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if (metadataItemsPath) {
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Logger.debug(`[BackupManager] Backing up Metadata Items "${metadataItemsPath}"`)
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archive.directory(metadataItemsPath, 'metadata-items')
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}
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archive.append(backup.detailsString, { name: 'details' })
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archive.finalize()
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})
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}
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}
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module.exports = BackupManager |