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
  13 const startVideoPlaylistsURL = WEBSERVER.SCHEME + '://' + join(WEBSERVER.HOST, 'videos', 'watch', 'playlist') + '/'
  14 const startVideosURL = WEBSERVER.SCHEME + '://' + join(WEBSERVER.HOST, 'videos', 'watch') + '/'
  15
  16 const watchRegex = new RegExp('([^/]+)$')
  17 const isURLOptions = {
  18   require_host: true,
  19   require_tld: true
  20 }
  21
  22 // We validate 'localhost', so we don't have the top level domain
  23 if (isTestInstance()) {
  24   isURLOptions.require_tld = false
  25 }
  26
  27 const oembedValidator = [
  28   query('url').isURL(isURLOptions).withMessage('Should have a valid url'),
  29   query('maxwidth').optional().isInt().withMessage('Should have a valid max width'),
  30   query('maxheight').optional().isInt().withMessage('Should have a valid max height'),
  31   query('format').optional().isIn([ 'xml', 'json' ]).withMessage('Should have a valid format'),
  32
  33   async (req: express.Request, res: express.Response, next: express.NextFunction) => {
  34     logger.debug('Checking oembed parameters', { parameters: req.query })
  35
  36     if (areValidationErrors(req, res)) return
  37
  38     if (req.query.format !== undefined && req.query.format !== 'json') {
  39       return res.status(501)
  40         .json({ error: 'Requested format is not implemented on server.' })
  41     }
  42
  43     const url = req.query.url as string
  44
  45     const isPlaylist = url.startsWith(startVideoPlaylistsURL)
  46     const isVideo = isPlaylist ? false : url.startsWith(startVideosURL)
  47
  48     const startIsOk = isVideo || isPlaylist
  49
  50     const matches = watchRegex.exec(url)
  51
  52     if (startIsOk === false || matches === null) {
  53       return res.status(400)
  54         .json({ error: 'Invalid url.' })
  55     }
  56
  57     const elementId = matches[1]
  58     if (isIdOrUUIDValid(elementId) === false) {
  59       return res.status(400)
  60         .json({ error: 'Invalid video or playlist id.' })
  61     }
  62
  63     if (isVideo) {
  64       const video = await fetchVideo(elementId, 'all')
  65
  66       if (!video) {
  67         return res.status(404)
  68           .json({ error: 'Video not found' })
  69       }
  70
  71       if (video.privacy !== VideoPrivacy.PUBLIC) {
  72         return res.status(403)
  73           .json({ error: 'Video is not public' })
  74       }
  75
  76       res.locals.videoAll = video
  77       return next()
  78     }
  79
  80     // Is playlist
  81
  82     const videoPlaylist = await VideoPlaylistModel.loadWithAccountAndChannelSummary(elementId, undefined)
  83     if (!videoPlaylist) {
  84       return res.status(404)
  85         .json({ error: 'Video playlist not found' })
  86     }
  87
  88     if (videoPlaylist.privacy !== VideoPlaylistPrivacy.PUBLIC) {
  89       return res.status(403)
  90         .json({ error: 'Playlist is not public' })
  91     }
  92
  93     res.locals.videoPlaylistSummary = videoPlaylist
  94     return next()
  95   }
  96
  97 ]
  98
  99 // ---------------------------------------------------------------------------
 100
 101 export {
 102   oembedValidator
 103 }