server/controllers/client.ts

   1 import * as express from 'express'
   2 import { join } from 'path'
   3 import * as validator from 'validator'
   4 import * as Bluebird from 'bluebird'
   5
   6 import { database as db } from '../initializers/database'
   7 import {
   8   CONFIG,
   9   STATIC_PATHS,
  10   STATIC_MAX_AGE,
  11   OPENGRAPH_AND_OEMBED_COMMENT,
  12   EMBED_SIZE
  13 } from '../initializers'
  14 import { root, readFileBufferPromise, escapeHTML } from '../helpers'
  15 import { asyncMiddleware } from '../middlewares'
  16 import { VideoInstance } from '../models'
  17
  18 const clientsRouter = express.Router()
  19
  20 const distPath = join(root(), 'client', 'dist')
  21 const embedPath = join(distPath, 'standalone', 'videos', 'embed.html')
  22 const indexPath = join(distPath, 'index.html')
  23
  24 // Special route that add OpenGraph and oEmbed tags
  25 // Do not use a template engine for a so little thing
  26 clientsRouter.use('/videos/watch/:id',
  27   asyncMiddleware(generateWatchHtmlPage)
  28 )
  29
  30 clientsRouter.use('/videos/embed', (req: express.Request, res: express.Response, next: express.NextFunction) => {
  31   res.sendFile(embedPath)
  32 })
  33
  34 // Static HTML/CSS/JS client files
  35 clientsRouter.use('/client', express.static(distPath, { maxAge: STATIC_MAX_AGE }))
  36
  37 // 404 for static files not found
  38 clientsRouter.use('/client/*', (req: express.Request, res: express.Response, next: express.NextFunction) => {
  39   res.sendStatus(404)
  40 })
  41
  42 // ---------------------------------------------------------------------------
  43
  44 export {
  45   clientsRouter
  46 }
  47
  48 // ---------------------------------------------------------------------------
  49
  50 function addOpenGraphAndOEmbedTags (htmlStringPage: string, video: VideoInstance) {
  51   const previewUrl = CONFIG.WEBSERVER.URL + STATIC_PATHS.PREVIEWS + video.getPreviewName()
  52   const videoUrl = CONFIG.WEBSERVER.URL + '/videos/watch/' + video.uuid
  53
  54   const videoName = escapeHTML(video.name)
  55   const videoDescription = escapeHTML(video.description)
  56   const embedUrl = CONFIG.WEBSERVER.URL + video.getEmbedPath()
  57
  58   const openGraphMetaTags = {
  59     'og:type': 'video',
  60     'og:title': videoName,
  61     'og:image': previewUrl,
  62     'og:url': videoUrl,
  63     'og:description': videoDescription,
  64
  65     'og:video:url': embedUrl,
  66     'og:video:secure_url': embedUrl,
  67     'og:video:type': 'text/html',
  68     'og:video:width': EMBED_SIZE.width,
  69     'og:video:height': EMBED_SIZE.height,
  70
  71     'name': videoName,
  72     'description': videoDescription,
  73     'image': previewUrl,
  74
  75     'twitter:card': 'summary_large_image',
  76     'twitter:site': '@Chocobozzz',
  77     'twitter:title': videoName,
  78     'twitter:description': videoDescription,
  79     'twitter:image': previewUrl,
  80     'twitter:player': embedUrl,
  81     'twitter:player:width': EMBED_SIZE.width,
  82     'twitter:player:height': EMBED_SIZE.height
  83   }
  84
  85   const oembedLinkTags = [
  86     {
  87       type: 'application/json+oembed',
  88       href: CONFIG.WEBSERVER.URL + '/services/oembed?url=' + encodeURIComponent(videoUrl),
  89       title: videoName
  90     }
  91   ]
  92
  93   let tagsString = ''
  94   Object.keys(openGraphMetaTags).forEach(tagName => {
  95     const tagValue = openGraphMetaTags[tagName]
  96
  97     tagsString += `<meta property="${tagName}" content="${tagValue}" />`
  98   })
  99
 100   for (const oembedLinkTag of oembedLinkTags) {
 101     tagsString += `<link rel="alternate" type="${oembedLinkTag.type}" href="${oembedLinkTag.href}" title="${oembedLinkTag.title}" />`
 102   }
 103
 104   return htmlStringPage.replace(OPENGRAPH_AND_OEMBED_COMMENT, tagsString)
 105 }
 106
 107 async function generateWatchHtmlPage (req: express.Request, res: express.Response, next: express.NextFunction) {
 108   const videoId = '' + req.params.id
 109   let videoPromise: Bluebird<VideoInstance>
 110
 111   // Let Angular application handle errors
 112   if (validator.isUUID(videoId, 4)) {
 113     videoPromise = db.Video.loadByUUIDAndPopulateAccountAndServerAndTags(videoId)
 114   } else if (validator.isInt(videoId)) {
 115     videoPromise = db.Video.loadAndPopulateAccountAndServerAndTags(+videoId)
 116   } else {
 117     return res.sendFile(indexPath)
 118   }
 119
 120   let [ file, video ] = await Promise.all([
 121     readFileBufferPromise(indexPath),
 122     videoPromise
 123   ])
 124
 125   const html = file.toString()
 126
 127   // Let Angular application handle errors
 128   if (!video) return res.sendFile(indexPath)
 129
 130   const htmlStringPageWithTags = addOpenGraphAndOEmbedTags(html, video)
 131   res.set('Content-Type', 'text/html; charset=UTF-8').send(htmlStringPageWithTags)
 132 }