PeerTube/server/controllers/client.ts

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import * as Bluebird from 'bluebird'
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import * as express from 'express'
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import { join } from 'path'
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import * as validator from 'validator'
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import { escapeHTML, readFileBufferPromise, root } from '../helpers/core-utils'
import { CONFIG, EMBED_SIZE, OPENGRAPH_AND_OEMBED_COMMENT, STATIC_MAX_AGE, STATIC_PATHS } from '../initializers'
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import { asyncMiddleware } from '../middlewares'
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import { VideoModel } from '../models/video/video'
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const clientsRouter = express.Router()
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const distPath = join(root(), 'client', 'dist')
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const assetsImagesPath = join(root(), 'client', 'dist', 'client', 'assets', 'images')
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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 and oEmbed 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',
asyncMiddleware(generateWatchHtmlPage)
)
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clientsRouter.use('/videos/embed', (req: express.Request, res: express.Response, next: express.NextFunction) => {
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res.sendFile(embedPath)
})
// Static HTML/CSS/JS client files
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clientsRouter.use('/client', express.static(distPath, { maxAge: STATIC_MAX_AGE }))
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clientsRouter.use('/client/assets/images', express.static(assetsImagesPath, { maxAge: STATIC_MAX_AGE }))
// 404 for static files not found
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clientsRouter.use('/client/*', (req: express.Request, res: express.Response, next: express.NextFunction) => {
res.sendStatus(404)
})
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// ---------------------------------------------------------------------------
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export {
clientsRouter
}
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// ---------------------------------------------------------------------------
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function addOpenGraphAndOEmbedTags (htmlStringPage: string, video: VideoModel) {
const previewUrl = CONFIG.WEBSERVER.URL + STATIC_PATHS.PREVIEWS + video.getPreviewName()
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const videoUrl = CONFIG.WEBSERVER.URL + '/videos/watch/' + video.uuid
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const videoNameEscaped = escapeHTML(video.name)
const videoDescriptionEscaped = escapeHTML(video.description)
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const embedUrl = CONFIG.WEBSERVER.URL + video.getEmbedPath()
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const openGraphMetaTags = {
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'og:type': 'video',
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'og:title': videoNameEscaped,
'og:image': previewUrl,
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'og:url': videoUrl,
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'og:description': videoDescriptionEscaped,
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'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,
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'name': videoNameEscaped,
'description': videoDescriptionEscaped,
'image': previewUrl,
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'twitter:card': 'summary_large_image',
'twitter:site': '@Chocobozzz',
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'twitter:title': videoNameEscaped,
'twitter:description': videoDescriptionEscaped,
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'twitter:image': previewUrl,
'twitter:player': embedUrl,
'twitter:player:width': EMBED_SIZE.width,
'twitter:player:height': EMBED_SIZE.height
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}
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const oembedLinkTags = [
{
type: 'application/json+oembed',
href: CONFIG.WEBSERVER.URL + '/services/oembed?url=' + encodeURIComponent(videoUrl),
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title: videoNameEscaped
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}
]
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const schemaTags = {
name: videoNameEscaped,
description: videoDescriptionEscaped,
duration: video.getActivityStreamDuration(),
thumbnailURL: previewUrl,
contentURL: videoUrl,
embedURL: embedUrl,
uploadDate: video.createdAt
}
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let tagsString = ''
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Object.keys(openGraphMetaTags).forEach(tagName => {
const tagValue = openGraphMetaTags[tagName]
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tagsString += `<meta property="${tagName}" content="${tagValue}" />`
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})
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for (const oembedLinkTag of oembedLinkTags) {
tagsString += `<link rel="alternate" type="${oembedLinkTag.type}" href="${oembedLinkTag.href}" title="${oembedLinkTag.title}" />`
}
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tagsString += '<div itemprop="video" itemscope itemtype="http://schema.org/VideoObject">'
tagsString += '<h2>Video: <span itemprop="name">' + schemaTags.name + '</span></h2>'
Object.keys(schemaTags).forEach(tagName => {
const tagValue = schemaTags[tagName]
tagsString += `<meta itemprop="${tagName}" content="${tagValue}" />`
})
tagsString += '</div>'
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return htmlStringPage.replace(OPENGRAPH_AND_OEMBED_COMMENT, tagsString)
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}
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async 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 videoPromise: Bluebird<VideoModel>
// Let Angular application handle errors
if (validator.isUUID(videoId, 4)) {
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videoPromise = VideoModel.loadByUUIDAndPopulateAccountAndServerAndTags(videoId)
} else if (validator.isInt(videoId)) {
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videoPromise = VideoModel.loadAndPopulateAccountAndServerAndTags(+videoId)
} else {
return res.sendFile(indexPath)
}
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let [ file, video ] = await Promise.all([
readFileBufferPromise(indexPath),
videoPromise
])
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const html = file.toString()
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// 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)
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}