import * as express from 'express' import { join } from 'path' import * as validator from 'validator' import * as Bluebird from 'bluebird' import { CONFIG, STATIC_PATHS, STATIC_MAX_AGE, OPENGRAPH_AND_OEMBED_COMMENT, EMBED_SIZE } from '../initializers' import { root, readFileBufferPromise, escapeHTML } from '../helpers' import { asyncMiddleware } from '../middlewares' import { VideoModel } from '../models/video/video' const clientsRouter = express.Router() const distPath = join(root(), 'client', 'dist') const assetsImagesPath = join(root(), 'client', 'dist', 'client', 'assets', 'images') const embedPath = join(distPath, 'standalone', 'videos', 'embed.html') const indexPath = join(distPath, 'index.html') // Special route that add OpenGraph and oEmbed tags // Do not use a template engine for a so little thing clientsRouter.use('/videos/watch/:id', asyncMiddleware(generateWatchHtmlPage) ) clientsRouter.use('/videos/embed', (req: express.Request, res: express.Response, next: express.NextFunction) => { res.sendFile(embedPath) }) // Static HTML/CSS/JS client files clientsRouter.use('/client', express.static(distPath, { maxAge: STATIC_MAX_AGE })) clientsRouter.use('/client/assets/images', express.static(assetsImagesPath, { maxAge: STATIC_MAX_AGE })) // 404 for static files not found clientsRouter.use('/client/*', (req: express.Request, res: express.Response, next: express.NextFunction) => { res.sendStatus(404) }) // --------------------------------------------------------------------------- export { clientsRouter } // --------------------------------------------------------------------------- function addOpenGraphAndOEmbedTags (htmlStringPage: string, video: VideoModel) { const previewUrl = CONFIG.WEBSERVER.URL + STATIC_PATHS.PREVIEWS + video.getPreviewName() const videoUrl = CONFIG.WEBSERVER.URL + '/videos/watch/' + video.uuid const videoNameEscaped = escapeHTML(video.name) const videoDescriptionEscaped = escapeHTML(video.description) const embedUrl = CONFIG.WEBSERVER.URL + video.getEmbedPath() const openGraphMetaTags = { 'og:type': 'video', 'og:title': videoNameEscaped, 'og:image': previewUrl, 'og:url': videoUrl, 'og:description': videoDescriptionEscaped, 'og:video:url': embedUrl, 'og:video:secure_url': embedUrl, 'og:video:type': 'text/html', 'og:video:width': EMBED_SIZE.width, 'og:video:height': EMBED_SIZE.height, 'name': videoNameEscaped, 'description': videoDescriptionEscaped, 'image': previewUrl, 'twitter:card': 'summary_large_image', 'twitter:site': '@Chocobozzz', 'twitter:title': videoNameEscaped, 'twitter:description': videoDescriptionEscaped, 'twitter:image': previewUrl, 'twitter:player': embedUrl, 'twitter:player:width': EMBED_SIZE.width, 'twitter:player:height': EMBED_SIZE.height } const oembedLinkTags = [ { type: 'application/json+oembed', href: CONFIG.WEBSERVER.URL + '/services/oembed?url=' + encodeURIComponent(videoUrl), title: videoNameEscaped } ] let tagsString = '' Object.keys(openGraphMetaTags).forEach(tagName => { const tagValue = openGraphMetaTags[tagName] tagsString += `` }) for (const oembedLinkTag of oembedLinkTags) { tagsString += `` } return htmlStringPage.replace(OPENGRAPH_AND_OEMBED_COMMENT, tagsString) } async function generateWatchHtmlPage (req: express.Request, res: express.Response, next: express.NextFunction) { const videoId = '' + req.params.id let videoPromise: Bluebird // Let Angular application handle errors if (validator.isUUID(videoId, 4)) { videoPromise = VideoModel.loadByUUIDAndPopulateAccountAndServerAndTags(videoId) } else if (validator.isInt(videoId)) { videoPromise = VideoModel.loadAndPopulateAccountAndServerAndTags(+videoId) } else { return res.sendFile(indexPath) } let [ file, video ] = await Promise.all([ readFileBufferPromise(indexPath), videoPromise ]) const html = file.toString() // Let Angular application handle errors if (!video) return res.sendFile(indexPath) const htmlStringPageWithTags = addOpenGraphAndOEmbedTags(html, video) res.set('Content-Type', 'text/html; charset=UTF-8').send(htmlStringPageWithTags) }