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