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import express from 'express'
import { query } from 'express-validator'
import LRUCache from 'lru-cache'
import { basename, dirname } from 'path'
import { exists, isUUIDValid } from '@server/helpers/custom-validators/misc'
import { logger } from '@server/helpers/logger'
import { LRU_CACHE } from '@server/initializers/constants'
import { VideoModel } from '@server/models/video/video'
import { VideoFileModel } from '@server/models/video/video-file'
import { MStreamingPlaylist, MVideoFile, MVideoThumbnail } from '@server/types/models'
import { HttpStatusCode } from '@shared/models'
import { areValidationErrors, checkCanAccessVideoStaticFiles } from './shared'
type LRUValue = {
allowed: boolean
video?: MVideoThumbnail
file?: MVideoFile
playlist?: MStreamingPlaylist }
const staticFileTokenBypass = new LRUCache<string, LRUValue>({
max: LRU_CACHE.STATIC_VIDEO_FILES_RIGHTS_CHECK.MAX_SIZE,
ttl: LRU_CACHE.STATIC_VIDEO_FILES_RIGHTS_CHECK.TTL
})
const ensureCanAccessVideoPrivateWebTorrentFiles = [
query('videoFileToken').optional().custom(exists),
async (req: express.Request, res: express.Response, next: express.NextFunction) => {
if (areValidationErrors(req, res)) return
const token = extractTokenOrDie(req, res)
if (!token) return
const cacheKey = token + '-' + req.originalUrl
if (staticFileTokenBypass.has(cacheKey)) {
const { allowed, file, video } = staticFileTokenBypass.get(cacheKey)
if (allowed === true) {
res.locals.onlyVideo = video
res.locals.videoFile = file
return next()
}
return res.sendStatus(HttpStatusCode.FORBIDDEN_403)
}
const result = await isWebTorrentAllowed(req, res)
staticFileTokenBypass.set(cacheKey, result)
if (result.allowed !== true) return
res.locals.onlyVideo = result.video
res.locals.videoFile = result.file
return next()
}
]
const ensureCanAccessPrivateVideoHLSFiles = [
query('videoFileToken').optional().custom(exists),
async (req: express.Request, res: express.Response, next: express.NextFunction) => {
if (areValidationErrors(req, res)) return
const videoUUID = basename(dirname(req.originalUrl))
if (!isUUIDValid(videoUUID)) {
logger.debug('Path does not contain valid video UUID to serve static file %s', req.originalUrl)
return res.sendStatus(HttpStatusCode.FORBIDDEN_403)
}
const token = extractTokenOrDie(req, res)
if (!token) return
const cacheKey = token + '-' + videoUUID
if (staticFileTokenBypass.has(cacheKey)) {
const { allowed, file, playlist, video } = staticFileTokenBypass.get(cacheKey)
if (allowed === true) {
res.locals.onlyVideo = video
res.locals.videoFile = file
res.locals.videoStreamingPlaylist = playlist
return next()
}
return res.sendStatus(HttpStatusCode.FORBIDDEN_403)
}
const result = await isHLSAllowed(req, res, videoUUID)
staticFileTokenBypass.set(cacheKey, result)
if (result.allowed !== true) return
res.locals.onlyVideo = result.video
res.locals.videoFile = result.file
res.locals.videoStreamingPlaylist = result.playlist
return next()
}
]
export {
ensureCanAccessVideoPrivateWebTorrentFiles,
ensureCanAccessPrivateVideoHLSFiles
}
// ---------------------------------------------------------------------------
async function isWebTorrentAllowed (req: express.Request, res: express.Response) {
const filename = basename(req.path)
const file = await VideoFileModel.loadWithVideoByFilename(filename)
if (!file) {
logger.debug('Unknown static file %s to serve', req.originalUrl, { filename })
res.sendStatus(HttpStatusCode.FORBIDDEN_403)
return { allowed: false }
}
const video = await VideoModel.load(file.getVideo().id)
return {
file,
video,
allowed: await checkCanAccessVideoStaticFiles({ req, res, video, paramId: video.uuid })
}
}
async function isHLSAllowed (req: express.Request, res: express.Response, videoUUID: string) {
const filename = basename(req.path)
const video = await VideoModel.loadWithFiles(videoUUID)
if (!video) {
logger.debug('Unknown static file %s to serve', req.originalUrl, { videoUUID })
res.sendStatus(HttpStatusCode.FORBIDDEN_403)
return { allowed: false }
}
const file = await VideoFileModel.loadByFilename(filename)
return {
file,
video,
playlist: video.getHLSPlaylist(),
allowed: await checkCanAccessVideoStaticFiles({ req, res, video, paramId: video.uuid })
}
}
function extractTokenOrDie (req: express.Request, res: express.Response) {
const token = res.locals.oauth?.token.accessToken || req.query.videoFileToken
if (!token) {
return res.fail({
message: 'Bearer token is missing in headers or video file token is missing in URL query parameters',
status: HttpStatusCode.FORBIDDEN_403
})
}
return token
}
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