import * as express from 'express' import * as Bluebird from 'bluebird' import { buildFileLocale, getDefaultLocale, is18nLocale, POSSIBLE_LOCALES } from '../../shared/models/i18n/i18n' import { CONFIG, CUSTOM_HTML_TAG_COMMENTS, EMBED_SIZE, STATIC_PATHS } from '../initializers' import { join } from 'path' import { escapeHTML } from '../helpers/core-utils' import { VideoModel } from '../models/video/video' import * as validator from 'validator' import { VideoPrivacy } from '../../shared/models/videos' import { readFile } from 'fs-extra' import { getActivityStreamDuration } from '../models/video/video-format-utils' export class ClientHtml { private static htmlCache: { [path: string]: string } = {} static invalidCache () { ClientHtml.htmlCache = {} } static async getDefaultHTMLPage (req: express.Request, res: express.Response, paramLang?: string) { const html = await ClientHtml.getIndexHTML(req, res, paramLang) let customHtml = ClientHtml.addTitleTag(html) customHtml = ClientHtml.addDescriptionTag(customHtml) return customHtml } static async getWatchHTMLPage (videoId: string, req: express.Request, res: express.Response) { let videoPromise: Bluebird // Let Angular application handle errors if (validator.isInt(videoId) || validator.isUUID(videoId, 4)) { videoPromise = VideoModel.loadAndPopulateAccountAndServerAndTags(videoId) } else { return ClientHtml.getIndexHTML(req, res) } const [ html, video ] = await Promise.all([ ClientHtml.getIndexHTML(req, res), videoPromise ]) // Let Angular application handle errors if (!video || video.privacy === VideoPrivacy.PRIVATE) { return ClientHtml.getIndexHTML(req, res) } let customHtml = ClientHtml.addTitleTag(html, escapeHTML(video.name)) customHtml = ClientHtml.addDescriptionTag(customHtml, escapeHTML(video.description)) customHtml = ClientHtml.addOpenGraphAndOEmbedTags(customHtml, video) return customHtml } private static async getIndexHTML (req: express.Request, res: express.Response, paramLang?: string) { const path = ClientHtml.getIndexPath(req, res, paramLang) if (ClientHtml.htmlCache[path]) return ClientHtml.htmlCache[path] const buffer = await readFile(path) let html = buffer.toString() html = ClientHtml.addCustomCSS(html) ClientHtml.htmlCache[path] = html return html } private static getIndexPath (req: express.Request, res: express.Response, paramLang?: string) { let lang: string // Check param lang validity if (paramLang && is18nLocale(paramLang)) { lang = paramLang // Save locale in cookies res.cookie('clientLanguage', lang, { secure: CONFIG.WEBSERVER.SCHEME === 'https', sameSite: true, maxAge: 1000 * 3600 * 24 * 90 // 3 months }) } else if (req.cookies.clientLanguage && is18nLocale(req.cookies.clientLanguage)) { lang = req.cookies.clientLanguage } else { lang = req.acceptsLanguages(POSSIBLE_LOCALES) || getDefaultLocale() } return join(__dirname, '../../../client/dist/' + buildFileLocale(lang) + '/index.html') } private static addTitleTag (htmlStringPage: string, title?: string) { let text = title || CONFIG.INSTANCE.NAME if (title) text += ` - ${CONFIG.INSTANCE.NAME}` const titleTag = `${text}` return htmlStringPage.replace(CUSTOM_HTML_TAG_COMMENTS.TITLE, titleTag) } private static addDescriptionTag (htmlStringPage: string, description?: string) { const content = description || CONFIG.INSTANCE.SHORT_DESCRIPTION const descriptionTag = `` return htmlStringPage.replace(CUSTOM_HTML_TAG_COMMENTS.DESCRIPTION, descriptionTag) } private static addCustomCSS (htmlStringPage: string) { const styleTag = '' return htmlStringPage.replace(CUSTOM_HTML_TAG_COMMENTS.CUSTOM_CSS, styleTag) } private static addOpenGraphAndOEmbedTags (htmlStringPage: string, video: VideoModel) { const previewUrl = CONFIG.WEBSERVER.URL + video.getPreviewStaticPath() const videoUrl = CONFIG.WEBSERVER.URL + video.getWatchStaticPath() const videoNameEscaped = escapeHTML(video.name) const videoDescriptionEscaped = escapeHTML(video.description) const embedUrl = CONFIG.WEBSERVER.URL + video.getEmbedStaticPath() 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: getActivityStreamDuration(video.duration), contentUrl: videoUrl, embedUrl: embedUrl, interactionCount: video.views } let tagsString = '' // Opengraph Object.keys(openGraphMetaTags).forEach(tagName => { const tagValue = openGraphMetaTags[tagName] tagsString += `` }) // OEmbed for (const oembedLinkTag of oembedLinkTags) { tagsString += `` } // Schema.org tagsString += `` // SEO tagsString += `` return htmlStringPage.replace(CUSTOM_HTML_TAG_COMMENTS.OPENGRAPH_AND_OEMBED, tagsString) } }