mirror of https://github.com/Chocobozzz/PeerTube
97 lines
2.9 KiB
JavaScript
97 lines
2.9 KiB
JavaScript
'use strict'
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const parallel = require('async/parallel')
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const express = require('express')
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const fs = require('fs')
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const mongoose = require('mongoose')
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const path = require('path')
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const constants = require('../initializers/constants')
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const middlewares = require('../middlewares')
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const validators = middlewares.validators
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const validatorsVideos = validators.videos
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const Video = mongoose.model('Video')
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const router = express.Router()
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const opengraphComment = '<!-- opengraph tags -->'
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const embedPath = path.join(__dirname, '../../client/dist/standalone/videos/embed.html')
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const indexPath = path.join(__dirname, '../../client/dist/index.html')
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// Special route that add OpenGraph tags
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// Do not use a template engine for a so little thing
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router.use('/videos/watch/:id', validatorsVideos.videosGet, generateWatchHtmlPage)
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router.use('/videos/embed', function (req, res, next) {
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res.sendFile(embedPath)
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})
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// ---------------------------------------------------------------------------
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module.exports = router
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// ---------------------------------------------------------------------------
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function addOpenGraphTags (htmlStringPage, video) {
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const videoUrl = constants.CONFIG.WEBSERVER.URL + '/videos/watch/'
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let baseUrlHttp
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if (video.isOwned()) {
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baseUrlHttp = constants.CONFIG.WEBSERVER.URL
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} else {
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baseUrlHttp = constants.REMOTE_SCHEME.HTTP + '://' + video.podHost
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}
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// We fetch the remote preview (bigger than the thumbnail)
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// This should not overhead the remote server since social websites put in a cache the OpenGraph tags
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// We can't use the thumbnail because these social websites want bigger images (> 200x200 for Facebook for example)
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const previewUrl = baseUrlHttp + constants.STATIC_PATHS.PREVIEWS + video.getPreviewName()
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const metaTags = {
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'og:type': 'video',
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'og:title': video.name,
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'og:image': previewUrl,
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'og:url': videoUrl,
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'og:description': video.description,
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'name': video.name,
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'description': video.description,
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'image': previewUrl,
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'twitter:card': 'summary_large_image',
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'twitter:site': '@Chocobozzz',
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'twitter:title': video.name,
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'twitter:description': video.description,
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'twitter:image': previewUrl
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}
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let tagsString = ''
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Object.keys(metaTags).forEach(function (tagName) {
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const tagValue = metaTags[tagName]
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tagsString += '<meta property="' + tagName + '" content="' + tagValue + '" />'
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})
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return htmlStringPage.replace(opengraphComment, tagsString)
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}
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function generateWatchHtmlPage (req, res, next) {
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parallel({
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file: function (callback) {
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fs.readFile(indexPath, callback)
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},
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video: function (callback) {
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Video.load(req.params.id, callback)
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}
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}, function (err, results) {
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if (err) return next(err)
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const html = results.file.toString()
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const video = results.video
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const htmlStringPageWithTags = addOpenGraphTags(html, video)
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res.set('Content-Type', 'text/html; charset=UTF-8').send(htmlStringPageWithTags)
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})
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}
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