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