mirror of https://github.com/Chocobozzz/PeerTube
119 lines
3.7 KiB
TypeScript
119 lines
3.7 KiB
TypeScript
import { parallel } from 'async'
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import * as express from 'express'
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import * as fs from 'fs'
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import { join } from 'path'
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import * as validator from 'validator'
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import { database as db } from '../initializers/database'
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import {
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CONFIG,
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REMOTE_SCHEME,
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STATIC_PATHS,
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STATIC_MAX_AGE
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} from '../initializers'
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import { root } from '../helpers'
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import { VideoInstance } from '../models'
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const clientsRouter = express.Router()
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// TODO: move to constants
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const opengraphComment = '<!-- opengraph tags -->'
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const distPath = join(root(), 'client', 'dist')
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const embedPath = join(distPath, 'standalone', 'videos', 'embed.html')
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const indexPath = join(distPath, '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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clientsRouter.use('/videos/watch/:id', generateWatchHtmlPage)
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clientsRouter.use('/videos/embed', function (req: express.Request, res: express.Response, next: express.NextFunction) {
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res.sendFile(embedPath)
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})
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// Static HTML/CSS/JS client files
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clientsRouter.use('/client', express.static(distPath, { maxAge: STATIC_MAX_AGE }))
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// 404 for static files not found
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clientsRouter.use('/client/*', function (req: express.Request, res: express.Response, next: express.NextFunction) {
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res.sendStatus(404)
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})
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// ---------------------------------------------------------------------------
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export {
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clientsRouter
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}
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// ---------------------------------------------------------------------------
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function addOpenGraphTags (htmlStringPage: string, video: VideoInstance) {
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let basePreviewUrlHttp
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if (video.isOwned()) {
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basePreviewUrlHttp = CONFIG.WEBSERVER.URL
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} else {
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basePreviewUrlHttp = REMOTE_SCHEME.HTTP + '://' + video.Author.Pod.host
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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 = basePreviewUrlHttp + STATIC_PATHS.PREVIEWS + video.getPreviewName()
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const videoUrl = CONFIG.WEBSERVER.URL + '/videos/watch/' + video.id
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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: express.Request, res: express.Response, next: express.NextFunction) {
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const videoId = '' + req.params.id
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// Let Angular application handle errors
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if (!validator.isUUID(videoId, 4)) return res.sendFile(indexPath)
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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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db.Video.loadAndPopulateAuthorAndPodAndTags(videoId, callback)
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}
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}, function (err: Error, result: { file: Buffer, video: VideoInstance }) {
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if (err) return next(err)
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const html = result.file.toString()
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const video = result.video
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// Let Angular application handle errors
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if (!video) return res.sendFile(indexPath)
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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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