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import * as Bluebird from 'bluebird'
import * as express from 'express'
import { join } from 'path'
import * as validator from 'validator'
import { escapeHTML, readFileBufferPromise, root } from '../helpers/core-utils'
import { CONFIG, EMBED_SIZE, OPENGRAPH_AND_OEMBED_COMMENT, STATIC_MAX_AGE, STATIC_PATHS } from '../initializers'
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', '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
const staticClientFiles = [
'manifest.json',
'ngsw-worker.js',
'ngsw.json'
]
for (const staticClientFile of staticClientFiles) {
const path = join(root(), 'client', 'dist', staticClientFile)
clientsRouter.use('/' + staticClientFile, express.static(path, { maxAge: STATIC_MAX_AGE }))
}
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': CONFIG.SERVICES.TWITTER.WHITELISTED ? 'player' : 'summary_large_image',
'twitter:site': CONFIG.SERVICES.TWITTER.USERNAME,
'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
}
]
const schemaTags = {
'@context': 'http://schema.org',
'@type': 'VideoObject',
name: videoNameEscaped,
description: videoDescriptionEscaped,
thumbnailUrl: previewUrl,
uploadDate: video.createdAt.toISOString(),
duration: video.getActivityStreamDuration(),
contentUrl: videoUrl,
embedUrl: embedUrl,
interactionCount: video.views
}
let tagsString = ''
// Opengraph
Object.keys(openGraphMetaTags).forEach(tagName => {
const tagValue = openGraphMetaTags[tagName]
tagsString += `<meta property="${tagName}" content="${tagValue}" />`
})
// OEmbed
for (const oembedLinkTag of oembedLinkTags) {
tagsString += `<link rel="alternate" type="${oembedLinkTag.type}" href="${oembedLinkTag.href}" title="${oembedLinkTag.title}" />`
}
// Schema.org
tagsString += `<script type="application/ld+json">${JSON.stringify(schemaTags)}</script>`
// SEO
tagsString += `<link rel="canonical" href="${videoUrl}" />`
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<VideoModel>
// 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)
}
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