import { parallel } from 'async' import express = require('express') import fs = require('fs') import { join } from 'path' import expressValidator = require('express-validator') // TODO: use .validator when express-validator typing will have validator field const validator = expressValidator['validator'] const db = require('../initializers/database') import { CONFIG, REMOTE_SCHEME, STATIC_PATHS, STATIC_MAX_AGE } from '../initializers' const clientsRouter = express.Router() // TODO: move to constants const opengraphComment = '' const distPath = join(__dirname, '..', '..', 'client/dist') const embedPath = join(distPath, 'standalone/videos/embed.html') const indexPath = join(distPath, 'index.html') // Special route that add OpenGraph tags // Do not use a template engine for a so little thing clientsRouter.use('/videos/watch/:id', generateWatchHtmlPage) clientsRouter.use('/videos/embed', function (req, res, next) { res.sendFile(embedPath) }) // Static HTML/CSS/JS client files clientsRouter.use('/client', express.static(distPath, { maxAge: STATIC_MAX_AGE })) // 404 for static files not found clientsRouter.use('/client/*', function (req, res, next) { res.sendStatus(404) }) // --------------------------------------------------------------------------- export { clientsRouter } // --------------------------------------------------------------------------- function addOpenGraphTags (htmlStringPage, video) { let basePreviewUrlHttp if (video.isOwned()) { basePreviewUrlHttp = CONFIG.WEBSERVER.URL } else { basePreviewUrlHttp = REMOTE_SCHEME.HTTP + '://' + video.Author.Pod.host } // We fetch the remote preview (bigger than the thumbnail) // This should not overhead the remote server since social websites put in a cache the OpenGraph tags // We can't use the thumbnail because these social websites want bigger images (> 200x200 for Facebook for example) const previewUrl = basePreviewUrlHttp + STATIC_PATHS.PREVIEWS + video.getPreviewName() const videoUrl = CONFIG.WEBSERVER.URL + '/videos/watch/' + video.id const metaTags = { 'og:type': 'video', 'og:title': video.name, 'og:image': previewUrl, 'og:url': videoUrl, 'og:description': video.description, 'name': video.name, 'description': video.description, 'image': previewUrl, 'twitter:card': 'summary_large_image', 'twitter:site': '@Chocobozzz', 'twitter:title': video.name, 'twitter:description': video.description, 'twitter:image': previewUrl } let tagsString = '' Object.keys(metaTags).forEach(function (tagName) { const tagValue = metaTags[tagName] tagsString += '' }) return htmlStringPage.replace(opengraphComment, tagsString) } function generateWatchHtmlPage (req, res, next) { const videoId = req.params.id // Let Angular application handle errors if (!validator.isUUID(videoId, 4)) return res.sendFile(indexPath) parallel({ file: function (callback) { fs.readFile(indexPath, callback) }, video: function (callback) { db.Video.loadAndPopulateAuthorAndPodAndTags(videoId, callback) } }, function (err, result: any) { if (err) return next(err) const html = result.file.toString() const video = result.video // Let Angular application handle errors if (!video) return res.sendFile(indexPath) const htmlStringPageWithTags = addOpenGraphTags(html, video) res.set('Content-Type', 'text/html; charset=UTF-8').send(htmlStringPageWithTags) }) }