server/controllers/client.ts

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