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import cors from 'cors'
import express from 'express'
import { logger } from '@server/helpers/logger'
import { VideoTorrentsSimpleFileCache } from '@server/lib/files-cache'
import { generateHLSFilePresignedUrl, generateWebVideoPresignedUrl } from '@server/lib/object-storage'
import { Hooks } from '@server/lib/plugins/hooks'
import { VideoPathManager } from '@server/lib/video-path-manager'
import { MStreamingPlaylist, MStreamingPlaylistVideo, MVideo, MVideoFile, MVideoFullLight } from '@server/types/models'
import { forceNumber } from '@shared/core-utils'
import { HttpStatusCode, VideoStorage, VideoStreamingPlaylistType } from '@shared/models'
import { STATIC_DOWNLOAD_PATHS } from '../initializers/constants'
import { asyncMiddleware, optionalAuthenticate, videosDownloadValidator } from '../middlewares'
const downloadRouter = express.Router()
downloadRouter.use(cors())
downloadRouter.use(
STATIC_DOWNLOAD_PATHS.TORRENTS + ':filename',
asyncMiddleware(downloadTorrent)
)
downloadRouter.use(
STATIC_DOWNLOAD_PATHS.VIDEOS + ':id-:resolution([0-9]+).:extension',
optionalAuthenticate,
asyncMiddleware(videosDownloadValidator),
asyncMiddleware(downloadVideoFile)
)
downloadRouter.use(
STATIC_DOWNLOAD_PATHS.HLS_VIDEOS + ':id-:resolution([0-9]+)-fragmented.:extension',
optionalAuthenticate,
asyncMiddleware(videosDownloadValidator),
asyncMiddleware(downloadHLSVideoFile)
)
// ---------------------------------------------------------------------------
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 downloadVideoFile (req: express.Request, res: express.Response) {
const video = res.locals.videoAll
const videoFile = getVideoFile(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
// Express uses basename on filename parameter
const videoName = video.name.replace(/[/\\]/g, '_')
const downloadFilename = `${videoName}-${videoFile.resolution}p${videoFile.extname}`
if (videoFile.storage === VideoStorage.OBJECT_STORAGE) {
return redirectToObjectStorage({ req, res, video, file: videoFile, downloadFilename })
}
await VideoPathManager.Instance.makeAvailableVideoFile(videoFile.withVideoOrPlaylist(video), path => {
return res.download(path, downloadFilename)
})
}
async function downloadHLSVideoFile (req: express.Request, res: express.Response) {
const video = res.locals.videoAll
const streamingPlaylist = getHLSPlaylist(video)
if (!streamingPlaylist) return res.status(HttpStatusCode.NOT_FOUND_404).end
const videoFile = getVideoFile(req, streamingPlaylist.VideoFiles)
if (!videoFile) {
return res.fail({
status: HttpStatusCode.NOT_FOUND_404,
message: 'Video file not found'
})
}
const allowParameters = {
req,
res,
video,
streamingPlaylist,
videoFile
}
const allowedResult = await Hooks.wrapFun(
isVideoDownloadAllowed,
allowParameters,
'filter:api.download.video.allowed.result'
)
if (!checkAllowResult(res, allowParameters, allowedResult)) return
const downloadFilename = `${video.name}-${videoFile.resolution}p-${streamingPlaylist.getStringType()}${videoFile.extname}`
if (videoFile.storage === VideoStorage.OBJECT_STORAGE) {
return redirectToObjectStorage({ req, res, video, streamingPlaylist, file: videoFile, downloadFilename })
}
await VideoPathManager.Instance.makeAvailableVideoFile(videoFile.withVideoOrPlaylist(streamingPlaylist), path => {
return res.download(path, downloadFilename)
})
}
function getVideoFile (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 checkAllowResult (res: express.Response, allowParameters: any, result?: AllowedResult) {
if (!result || result.allowed !== true) {
logger.info('Download is not allowed.', { result, allowParameters })
res.fail({
status: HttpStatusCode.FORBIDDEN_403,
message: result?.errorMessage || 'Refused download'
})
return false
}
return true
}
async function redirectToObjectStorage (options: {
req: express.Request
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)
return res.redirect(url)
}
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