server/core/controllers/download.ts
import { forceNumber, maxBy } from '@peertube/peertube-core-utils'
import { FileStorage, HttpStatusCode, VideoResolution, VideoStreamingPlaylistType } from '@peertube/peertube-models'
import { exists } from '@server/helpers/custom-validators/misc.js'
import { logger, loggerTagsFactory } from '@server/helpers/logger.js'
import { CONFIG } from '@server/initializers/config.js'
import { VideoTorrentsSimpleFileCache } from '@server/lib/files-cache/index.js'
import {
generateHLSFilePresignedUrl,
generateOriginalFilePresignedUrl,
generateUserExportPresignedUrl,
generateWebVideoPresignedUrl
} from '@server/lib/object-storage/index.js'
import { getFSUserExportFilePath } from '@server/lib/paths.js'
import { Hooks } from '@server/lib/plugins/hooks.js'
import { muxToMergeVideoFiles } from '@server/lib/video-file.js'
import { VideoPathManager } from '@server/lib/video-path-manager.js'
import {
MStreamingPlaylist,
MStreamingPlaylistVideo,
MUserExport,
MVideo,
MVideoFile,
MVideoFullLight
} from '@server/types/models/index.js'
import { MVideoSource } from '@server/types/models/video/video-source.js'
import cors from 'cors'
import express from 'express'
import { DOWNLOAD_PATHS } from '../initializers/constants.js'
import {
asyncMiddleware, buildRateLimiter, optionalAuthenticate,
originalVideoFileDownloadValidator,
userExportDownloadValidator,
videosDownloadValidator,
videosGenerateDownloadValidator
} from '../middlewares/index.js'
const lTags = loggerTagsFactory('download')
const downloadRouter = express.Router()
downloadRouter.use(cors())
downloadRouter.use(
DOWNLOAD_PATHS.TORRENTS + ':filename',
asyncMiddleware(downloadTorrent)
)
// ---------------------------------------------------------------------------
downloadRouter.use(
DOWNLOAD_PATHS.WEB_VIDEOS + ':id-:resolution([0-9]+).:extension',
optionalAuthenticate,
asyncMiddleware(videosDownloadValidator),
asyncMiddleware(downloadWebVideoFile)
)
downloadRouter.use(
DOWNLOAD_PATHS.HLS_VIDEOS + ':id-:resolution([0-9]+)-fragmented.:extension',
optionalAuthenticate,
asyncMiddleware(videosDownloadValidator),
asyncMiddleware(downloadHLSVideoFile)
)
const downloadGenerateRateLimiter = buildRateLimiter({
windowMs: CONFIG.RATES_LIMIT.DOWNLOAD_GENERATE_VIDEO.WINDOW_MS,
max: CONFIG.RATES_LIMIT.DOWNLOAD_GENERATE_VIDEO.MAX,
skipFailedRequests: true
})
downloadRouter.use(
DOWNLOAD_PATHS.GENERATE_VIDEO + ':id',
downloadGenerateRateLimiter,
optionalAuthenticate,
asyncMiddleware(videosDownloadValidator),
videosGenerateDownloadValidator,
asyncMiddleware(downloadGeneratedVideoFile)
)
// ---------------------------------------------------------------------------
downloadRouter.use(
DOWNLOAD_PATHS.USER_EXPORTS + ':filename',
asyncMiddleware(userExportDownloadValidator), // Include JWT token authentication
asyncMiddleware(downloadUserExport)
)
downloadRouter.use(
DOWNLOAD_PATHS.ORIGINAL_VIDEO_FILE + ':filename',
optionalAuthenticate,
asyncMiddleware(originalVideoFileDownloadValidator),
asyncMiddleware(downloadOriginalFile)
)
// ---------------------------------------------------------------------------
export {
downloadRouter
}
// ---------------------------------------------------------------------------
async function downloadTorrent (req: express.Request, res: express.Response) {
const result = await VideoTorrentsSimpleFileCache.Instance.getFilePath(req.params.filename)
if (!result) {
return res.fail({
status: HttpStatusCode.NOT_FOUND_404,
message: 'Torrent file not found'
})
}
const allowParameters = {
req,
res,
torrentPath: result.path,
downloadName: result.downloadName
}
const allowedResult = await Hooks.wrapFun(
isTorrentDownloadAllowed,
allowParameters,
'filter:api.download.torrent.allowed.result'
)
if (!checkAllowResult(res, allowParameters, allowedResult)) return
return res.download(result.path, result.downloadName)
}
// ---------------------------------------------------------------------------
async function downloadWebVideoFile (req: express.Request, res: express.Response) {
const video = res.locals.videoAll
const videoFile = getVideoFileFromReq(req, video.VideoFiles)
if (!videoFile) {
return res.fail({
status: HttpStatusCode.NOT_FOUND_404,
message: 'Video file not found'
})
}
const allowParameters = {
req,
res,
video,
videoFile
}
const allowedResult = await Hooks.wrapFun(
isVideoDownloadAllowed,
allowParameters,
'filter:api.download.video.allowed.result'
)
if (!checkAllowResult(res, allowParameters, allowedResult)) return
const downloadFilename = buildDownloadFilename({ video, resolution: videoFile.resolution, extname: videoFile.extname })
if (videoFile.storage === FileStorage.OBJECT_STORAGE) {
return redirectVideoDownloadToObjectStorage({ res, video, file: videoFile, downloadFilename })
}
await VideoPathManager.Instance.makeAvailableVideoFile(videoFile.withVideoOrPlaylist(video), path => {
return res.download(path, downloadFilename)
})
}
async function downloadHLSVideoFile (req: express.Request, res: express.Response) {
const video = res.locals.videoAll
const streamingPlaylist = getHLSPlaylist(video)
if (!streamingPlaylist) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
const videoFile = getVideoFileFromReq(req, streamingPlaylist.VideoFiles)
if (!videoFile) {
return res.fail({
status: HttpStatusCode.NOT_FOUND_404,
message: 'Video file not found'
})
}
const allowParameters = {
req,
res,
video,
streamingPlaylist,
videoFile
}
const allowedResult = await Hooks.wrapFun(
isVideoDownloadAllowed,
allowParameters,
'filter:api.download.video.allowed.result'
)
if (!checkAllowResult(res, allowParameters, allowedResult)) return
const downloadFilename = buildDownloadFilename({ video, streamingPlaylist, resolution: videoFile.resolution, extname: videoFile.extname })
if (videoFile.storage === FileStorage.OBJECT_STORAGE) {
return redirectVideoDownloadToObjectStorage({ res, video, streamingPlaylist, file: videoFile, downloadFilename })
}
await VideoPathManager.Instance.makeAvailableVideoFile(videoFile.withVideoOrPlaylist(streamingPlaylist), path => {
return res.download(path, downloadFilename)
})
}
// ---------------------------------------------------------------------------
async function downloadGeneratedVideoFile (req: express.Request, res: express.Response) {
const video = res.locals.videoAll
const filesToSelect = req.query.videoFileIds
const videoFiles = video.getAllFiles()
.filter(f => filesToSelect.includes(f.id))
if (videoFiles.length === 0) {
return res.fail({
status: HttpStatusCode.NOT_FOUND_404,
message: `No files found (${filesToSelect.join(', ')}) to download video ${video.url}`
})
}
if (videoFiles.filter(f => f.hasVideo()).length > 1 || videoFiles.filter(f => f.hasAudio()).length > 1) {
return res.fail({
status: HttpStatusCode.BAD_REQUEST_400,
// In theory we could, but ffmpeg-fluent doesn't support multiple input streams so prefer to reject this specific use case
message: `Cannot generate a container with multiple video/audio files. PeerTube supports a maximum of 1 audio and 1 video file`
})
}
const allowParameters = {
req,
res,
video,
videoFiles
}
const allowedResult = await Hooks.wrapFun(
isGeneratedVideoDownloadAllowed,
allowParameters,
'filter:api.download.generated-video.allowed.result'
)
if (!checkAllowResult(res, allowParameters, allowedResult)) return
const maxResolutionFile = maxBy(videoFiles, 'resolution')
// Prefer m4a extension for the user if this is a mp4 audio file only
const extname = maxResolutionFile.resolution === VideoResolution.H_NOVIDEO && maxResolutionFile.extname === '.mp4'
? '.m4a'
: maxResolutionFile.extname
const downloadFilename = buildDownloadFilename({ video, extname })
res.setHeader('Content-disposition', `attachment; filename="${encodeURI(downloadFilename)}`)
await muxToMergeVideoFiles({ video, videoFiles, output: res })
}
// ---------------------------------------------------------------------------
function downloadUserExport (req: express.Request, res: express.Response) {
const userExport = res.locals.userExport
const downloadFilename = userExport.filename
if (userExport.storage === FileStorage.OBJECT_STORAGE) {
return redirectUserExportToObjectStorage({ res, userExport, downloadFilename })
}
res.download(getFSUserExportFilePath(userExport), downloadFilename)
return Promise.resolve()
}
function downloadOriginalFile (req: express.Request, res: express.Response) {
const videoSource = res.locals.videoSource
const downloadFilename = videoSource.inputFilename
if (videoSource.storage === FileStorage.OBJECT_STORAGE) {
return redirectOriginalFileToObjectStorage({ res, videoSource, downloadFilename })
}
res.download(VideoPathManager.Instance.getFSOriginalVideoFilePath(videoSource.keptOriginalFilename), downloadFilename)
return Promise.resolve()
}
// ---------------------------------------------------------------------------
function getVideoFileFromReq (req: express.Request, files: MVideoFile[]) {
const resolution = forceNumber(req.params.resolution)
return files.find(f => f.resolution === resolution)
}
function getHLSPlaylist (video: MVideoFullLight) {
const playlist = video.VideoStreamingPlaylists.find(p => p.type === VideoStreamingPlaylistType.HLS)
if (!playlist) return undefined
return Object.assign(playlist, { Video: video })
}
type AllowedResult = {
allowed: boolean
errorMessage?: string
}
function isTorrentDownloadAllowed (_object: {
torrentPath: string
}): AllowedResult {
return { allowed: true }
}
function isVideoDownloadAllowed (_object: {
video: MVideo
videoFile: MVideoFile
streamingPlaylist?: MStreamingPlaylist
}): AllowedResult {
return { allowed: true }
}
function isGeneratedVideoDownloadAllowed (_object: {
video: MVideo
videoFiles: MVideoFile[]
}): AllowedResult {
return { allowed: true }
}
// ---------------------------------------------------------------------------
function checkAllowResult (res: express.Response, allowParameters: any, result?: AllowedResult) {
if (!result || result.allowed !== true) {
logger.info('Download is not allowed.', { result, allowParameters, ...lTags() })
res.fail({
status: HttpStatusCode.FORBIDDEN_403,
message: result?.errorMessage || 'Refused download'
})
return false
}
return true
}
async function redirectVideoDownloadToObjectStorage (options: {
res: express.Response
video: MVideo
file: MVideoFile
streamingPlaylist?: MStreamingPlaylistVideo
downloadFilename: string
}) {
const { res, video, streamingPlaylist, file, downloadFilename } = options
const url = streamingPlaylist
? await generateHLSFilePresignedUrl({ streamingPlaylist, file, downloadFilename })
: await generateWebVideoPresignedUrl({ file, downloadFilename })
logger.debug('Generating pre-signed URL %s for video %s', url, video.uuid, lTags())
return res.redirect(url)
}
async function redirectUserExportToObjectStorage (options: {
res: express.Response
downloadFilename: string
userExport: MUserExport
}) {
const { res, downloadFilename, userExport } = options
const url = await generateUserExportPresignedUrl({ userExport, downloadFilename })
logger.debug('Generating pre-signed URL %s for user export %s', url, userExport.filename, lTags())
return res.redirect(url)
}
async function redirectOriginalFileToObjectStorage (options: {
res: express.Response
downloadFilename: string
videoSource: MVideoSource
}) {
const { res, downloadFilename, videoSource } = options
const url = await generateOriginalFilePresignedUrl({ videoSource, downloadFilename })
logger.debug('Generating pre-signed URL %s for original video file %s', url, videoSource.keptOriginalFilename, lTags())
return res.redirect(url)
}
function buildDownloadFilename (options: {
video: MVideo
streamingPlaylist?: MStreamingPlaylist
resolution?: number
extname: string
}) {
const { video, resolution, extname, streamingPlaylist } = options
// Express uses basename on filename parameter
const videoName = video.name.replace(/[/\\]/g, '_')
const suffixStr = streamingPlaylist
? `-${streamingPlaylist.getStringType()}`
: ''
const resolutionStr = exists(resolution)
? `-${resolution}p`
: ''
return videoName + resolutionStr + suffixStr + extname
}