server/controllers/client.ts

   1 import * as Bluebird from 'bluebird'
   2 import * as express from 'express'
   3 import { join } from 'path'
   4 import * as validator from 'validator'
   5 import { escapeHTML, readFileBufferPromise, root } from '../helpers/core-utils'
   6 import { CONFIG, EMBED_SIZE, OPENGRAPH_AND_OEMBED_COMMENT, STATIC_MAX_AGE, STATIC_PATHS } from '../initializers'
   7 import { asyncMiddleware } from '../middlewares'
   8 import { VideoModel } from '../models/video/video'
   9
  10 const clientsRouter = express.Router()
  11
  12 const distPath = join(root(), 'client', 'dist')
  13 const assetsImagesPath = join(root(), 'client', 'dist', 'client', 'assets', 'images')
  14 const manifestPath = join(root(), 'client', 'dist', 'manifest.json')
  15 const serviceWorkerPath = join(root(), 'client', 'dist', 'ngsw-worker.js')
  16 const embedPath = join(distPath, 'standalone', 'videos', 'embed.html')
  17 const indexPath = join(distPath, 'index.html')
  18
  19 // Special route that add OpenGraph and oEmbed tags
  20 // Do not use a template engine for a so little thing
  21 clientsRouter.use('/videos/watch/:id',
  22   asyncMiddleware(generateWatchHtmlPage)
  23 )
  24
  25 clientsRouter.use('/videos/embed', (req: express.Request, res: express.Response, next: express.NextFunction) => {
  26   res.sendFile(embedPath)
  27 })
  28
  29 // Static HTML/CSS/JS client files
  30 clientsRouter.use('/manifest.json', express.static(manifestPath, { maxAge: STATIC_MAX_AGE }))
  31 clientsRouter.use('/ngsw-worker.js', express.static(serviceWorkerPath, { maxAge: STATIC_MAX_AGE }))
  32 clientsRouter.use('/client', express.static(distPath, { maxAge: STATIC_MAX_AGE }))
  33 clientsRouter.use('/client/assets/images', express.static(assetsImagesPath, { maxAge: STATIC_MAX_AGE }))
  34
  35 // 404 for static files not found
  36 clientsRouter.use('/client/*', (req: express.Request, res: express.Response, next: express.NextFunction) => {
  37   res.sendStatus(404)
  38 })
  39
  40 // ---------------------------------------------------------------------------
  41
  42 export {
  43   clientsRouter
  44 }
  45
  46 // ---------------------------------------------------------------------------
  47
  48 function addOpenGraphAndOEmbedTags (htmlStringPage: string, video: VideoModel) {
  49   const previewUrl = CONFIG.WEBSERVER.URL + STATIC_PATHS.PREVIEWS + video.getPreviewName()
  50   const videoUrl = CONFIG.WEBSERVER.URL + '/videos/watch/' + video.uuid
  51
  52   const videoNameEscaped = escapeHTML(video.name)
  53   const videoDescriptionEscaped = escapeHTML(video.description)
  54   const embedUrl = CONFIG.WEBSERVER.URL + video.getEmbedPath()
  55
  56   const openGraphMetaTags = {
  57     'og:type': 'video',
  58     'og:title': videoNameEscaped,
  59     'og:image': previewUrl,
  60     'og:url': videoUrl,
  61     'og:description': videoDescriptionEscaped,
  62
  63     'og:video:url': embedUrl,
  64     'og:video:secure_url': embedUrl,
  65     'og:video:type': 'text/html',
  66     'og:video:width': EMBED_SIZE.width,
  67     'og:video:height': EMBED_SIZE.height,
  68
  69     'name': videoNameEscaped,
  70     'description': videoDescriptionEscaped,
  71     'image': previewUrl,
  72
  73     'twitter:card': 'summary_large_image',
  74     'twitter:site': '@Chocobozzz',
  75     'twitter:title': videoNameEscaped,
  76     'twitter:description': videoDescriptionEscaped,
  77     'twitter:image': previewUrl,
  78     'twitter:player': embedUrl,
  79     'twitter:player:width': EMBED_SIZE.width,
  80     'twitter:player:height': EMBED_SIZE.height
  81   }
  82
  83   const oembedLinkTags = [
  84     {
  85       type: 'application/json+oembed',
  86       href: CONFIG.WEBSERVER.URL + '/services/oembed?url=' + encodeURIComponent(videoUrl),
  87       title: videoNameEscaped
  88     }
  89   ]
  90
  91   const schemaTags = {
  92     '@context': 'http://schema.org',
  93     '@type': 'VideoObject',
  94     name: videoNameEscaped,
  95     description: videoDescriptionEscaped,
  96     duration: video.getActivityStreamDuration(),
  97     thumbnailURL: previewUrl,
  98     contentURL: videoUrl,
  99     embedURL: embedUrl,
 100     uploadDate: video.createdAt
 101   }
 102
 103   let tagsString = ''
 104
 105   // Opengraph
 106   Object.keys(openGraphMetaTags).forEach(tagName => {
 107     const tagValue = openGraphMetaTags[tagName]
 108
 109     tagsString += `<meta property="${tagName}" content="${tagValue}" />`
 110   })
 111
 112   // OEmbed
 113   for (const oembedLinkTag of oembedLinkTags) {
 114     tagsString += `<link rel="alternate" type="${oembedLinkTag.type}" href="${oembedLinkTag.href}" title="${oembedLinkTag.title}" />`
 115   }
 116
 117   // Schema.org
 118   tagsString += `<script type="application/ld+json">${JSON.stringify(schemaTags)}</script>`
 119
 120   return htmlStringPage.replace(OPENGRAPH_AND_OEMBED_COMMENT, tagsString)
 121 }
 122
 123 async function generateWatchHtmlPage (req: express.Request, res: express.Response, next: express.NextFunction) {
 124   const videoId = '' + req.params.id
 125   let videoPromise: Bluebird<VideoModel>
 126
 127   // Let Angular application handle errors
 128   if (validator.isUUID(videoId, 4)) {
 129     videoPromise = VideoModel.loadByUUIDAndPopulateAccountAndServerAndTags(videoId)
 130   } else if (validator.isInt(videoId)) {
 131     videoPromise = VideoModel.loadAndPopulateAccountAndServerAndTags(+videoId)
 132   } else {
 133     return res.sendFile(indexPath)
 134   }
 135
 136   let [ file, video ] = await Promise.all([
 137     readFileBufferPromise(indexPath),
 138     videoPromise
 139   ])
 140
 141   const html = file.toString()
 142
 143   // Let Angular application handle errors
 144   if (!video) return res.sendFile(indexPath)
 145
 146   const htmlStringPageWithTags = addOpenGraphAndOEmbedTags(html, video)
 147   res.set('Content-Type', 'text/html; charset=UTF-8').send(htmlStringPageWithTags)
 148 }