server/middlewares/validators/oembed.ts

   1 import * as express from 'express'
   2 import { query } from 'express-validator'
   3 import { join } from 'path'
   4 import { fetchVideo } from '@server/helpers/video'
   5 import { VideoPlaylistModel } from '@server/models/video/video-playlist'
   6 import { VideoPlaylistPrivacy, VideoPrivacy } from '@shared/models'
   7 import { isTestInstance } from '../../helpers/core-utils'
   8 import { isIdOrUUIDValid } from '../../helpers/custom-validators/misc'
   9 import { logger } from '../../helpers/logger'
  10 import { WEBSERVER } from '../../initializers/constants'
  11 import { areValidationErrors } from './utils'
  12 import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
  13
  14 const startVideoPlaylistsURL = WEBSERVER.SCHEME + '://' + join(WEBSERVER.HOST, 'videos', 'watch', 'playlist') + '/'
  15 const startVideosURL = WEBSERVER.SCHEME + '://' + join(WEBSERVER.HOST, 'videos', 'watch') + '/'
  16
  17 const watchRegex = new RegExp('([^/]+)$')
  18 const isURLOptions = {
  19   require_host: true,
  20   require_tld: true
  21 }
  22
  23 // We validate 'localhost', so we don't have the top level domain
  24 if (isTestInstance()) {
  25   isURLOptions.require_tld = false
  26 }
  27
  28 const oembedValidator = [
  29   query('url').isURL(isURLOptions).withMessage('Should have a valid url'),
  30   query('maxwidth').optional().isInt().withMessage('Should have a valid max width'),
  31   query('maxheight').optional().isInt().withMessage('Should have a valid max height'),
  32   query('format').optional().isIn([ 'xml', 'json' ]).withMessage('Should have a valid format'),
  33
  34   async (req: express.Request, res: express.Response, next: express.NextFunction) => {
  35     logger.debug('Checking oembed parameters', { parameters: req.query })
  36
  37     if (areValidationErrors(req, res)) return
  38
  39     if (req.query.format !== undefined && req.query.format !== 'json') {
  40       return res.status(HttpStatusCode.NOT_IMPLEMENTED_501)
  41         .json({ error: 'Requested format is not implemented on server.' })
  42     }
  43
  44     const url = req.query.url as string
  45
  46     const isPlaylist = url.startsWith(startVideoPlaylistsURL)
  47     const isVideo = isPlaylist ? false : url.startsWith(startVideosURL)
  48
  49     const startIsOk = isVideo || isPlaylist
  50
  51     const matches = watchRegex.exec(url)
  52
  53     if (startIsOk === false || matches === null) {
  54       return res.status(HttpStatusCode.BAD_REQUEST_400)
  55         .json({ error: 'Invalid url.' })
  56     }
  57
  58     const elementId = matches[1]
  59     if (isIdOrUUIDValid(elementId) === false) {
  60       return res.status(HttpStatusCode.BAD_REQUEST_400)
  61         .json({ error: 'Invalid video or playlist id.' })
  62     }
  63
  64     if (isVideo) {
  65       const video = await fetchVideo(elementId, 'all')
  66
  67       if (!video) {
  68         return res.status(HttpStatusCode.NOT_FOUND_404)
  69           .json({ error: 'Video not found' })
  70       }
  71
  72       if (video.privacy !== VideoPrivacy.PUBLIC) {
  73         return res.status(HttpStatusCode.FORBIDDEN_403)
  74           .json({ error: 'Video is not public' })
  75       }
  76
  77       res.locals.videoAll = video
  78       return next()
  79     }
  80
  81     // Is playlist
  82
  83     const videoPlaylist = await VideoPlaylistModel.loadWithAccountAndChannelSummary(elementId, undefined)
  84     if (!videoPlaylist) {
  85       return res.status(HttpStatusCode.NOT_FOUND_404)
  86         .json({ error: 'Video playlist not found' })
  87     }
  88
  89     if (videoPlaylist.privacy !== VideoPlaylistPrivacy.PUBLIC) {
  90       return res.status(HttpStatusCode.FORBIDDEN_403)
  91         .json({ error: 'Playlist is not public' })
  92     }
  93
  94     res.locals.videoPlaylistSummary = videoPlaylist
  95     return next()
  96   }
  97
  98 ]
  99
 100 // ---------------------------------------------------------------------------
 101
 102 export {
 103   oembedValidator
 104 }