aboutsummaryrefslogtreecommitdiffhomepage
path: root/server/lib/client-html.ts
blob: e5950561445015452d4d0ea8e7dc45bdcda5aa87 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
import * as express from 'express'
import { buildFileLocale, getDefaultLocale, is18nLocale, POSSIBLE_LOCALES } from '../../shared/models/i18n/i18n'
import { CUSTOM_HTML_TAG_COMMENTS, EMBED_SIZE, PLUGIN_GLOBAL_CSS_PATH, WEBSERVER } from '../initializers/constants'
import { join } from 'path'
import { escapeHTML, sha256 } from '../helpers/core-utils'
import { VideoModel } from '../models/video/video'
import validator from 'validator'
import { VideoPrivacy } from '../../shared/models/videos'
import { readFile } from 'fs-extra'
import { getActivityStreamDuration } from '../models/video/video-format-utils'
import { AccountModel } from '../models/account/account'
import { VideoChannelModel } from '../models/video/video-channel'
import * as Bluebird from 'bluebird'
import { CONFIG } from '../initializers/config'
import { logger } from '../helpers/logger'
import { MAccountActor, MChannelActor, MVideo } from '../typings/models'

export class ClientHtml {

  private static htmlCache: { [ path: string ]: string } = {}

  static invalidCache () {
    logger.info('Cleaning HTML cache.')

    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 Angular application handle errors
    if (!validator.isInt(videoId) && !validator.isUUID(videoId, 4)) {
      res.status(404)
      return ClientHtml.getIndexHTML(req, res)
    }

    const [ html, video ] = await Promise.all([
      ClientHtml.getIndexHTML(req, res),
      VideoModel.loadWithBlacklist(videoId)
    ])

    // Let Angular application handle errors
    if (!video || video.privacy === VideoPrivacy.PRIVATE || video.privacy === VideoPrivacy.INTERNAL || video.VideoBlacklist) {
      res.status(404)
      return html
    }

    let customHtml = ClientHtml.addTitleTag(html, escapeHTML(video.name))
    customHtml = ClientHtml.addDescriptionTag(customHtml, escapeHTML(video.description))
    customHtml = ClientHtml.addVideoOpenGraphAndOEmbedTags(customHtml, video)

    return customHtml
  }

  static async getAccountHTMLPage (nameWithHost: string, req: express.Request, res: express.Response) {
    return this.getAccountOrChannelHTMLPage(() => AccountModel.loadByNameWithHost(nameWithHost), req, res)
  }

  static async getVideoChannelHTMLPage (nameWithHost: string, req: express.Request, res: express.Response) {
    return this.getAccountOrChannelHTMLPage(() => VideoChannelModel.loadByNameWithHostAndPopulateAccount(nameWithHost), req, res)
  }

  private static async getAccountOrChannelHTMLPage (
    loader: () => Bluebird<MAccountActor | MChannelActor>,
    req: express.Request,
    res: express.Response
  ) {
    const [ html, entity ] = await Promise.all([
      ClientHtml.getIndexHTML(req, res),
      loader()
    ])

    // Let Angular application handle errors
    if (!entity) {
      res.status(404)
      return ClientHtml.getIndexHTML(req, res)
    }

    let customHtml = ClientHtml.addTitleTag(html, escapeHTML(entity.getDisplayName()))
    customHtml = ClientHtml.addDescriptionTag(customHtml, escapeHTML(entity.description))
    customHtml = ClientHtml.addAccountOrChannelMetaTags(customHtml, entity)

    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)
    html = await ClientHtml.addAsyncPluginCSS(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: 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 = `<title>${text}</title>`

    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 = `<meta name="description" content="${content}" />`

    return htmlStringPage.replace(CUSTOM_HTML_TAG_COMMENTS.DESCRIPTION, descriptionTag)
  }

  private static addCustomCSS (htmlStringPage: string) {
    const styleTag = `<style class="custom-css-style">${CONFIG.INSTANCE.CUSTOMIZATIONS.CSS}</style>`

    return htmlStringPage.replace(CUSTOM_HTML_TAG_COMMENTS.CUSTOM_CSS, styleTag)
  }

  private static async addAsyncPluginCSS (htmlStringPage: string) {
    const globalCSSContent = await readFile(PLUGIN_GLOBAL_CSS_PATH)
    if (globalCSSContent.byteLength === 0) return htmlStringPage

    const fileHash = sha256(globalCSSContent)
    const linkTag = `<link rel="stylesheet" href="/plugins/global.css?hash=${fileHash}" />`

    return htmlStringPage.replace('</head>', linkTag + '</head>')
  }

  private static addVideoOpenGraphAndOEmbedTags (htmlStringPage: string, video: MVideo) {
    const previewUrl = WEBSERVER.URL + video.getPreviewStaticPath()
    const videoUrl = WEBSERVER.URL + video.getWatchStaticPath()

    const videoNameEscaped = escapeHTML(video.name)
    const videoDescriptionEscaped = escapeHTML(video.description)
    const embedUrl = 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: 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 += `<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, use origin video url so Google does not index remote videos
    tagsString += `<link rel="canonical" href="${video.url}" />`

    return this.addOpenGraphAndOEmbedTags(htmlStringPage, tagsString)
  }

  private static addAccountOrChannelMetaTags (htmlStringPage: string, entity: MAccountActor | MChannelActor) {
    // SEO, use origin account or channel URL
    const metaTags = `<link rel="canonical" href="${entity.Actor.url}" />`

    return this.addOpenGraphAndOEmbedTags(htmlStringPage, metaTags)
  }

  private static addOpenGraphAndOEmbedTags (htmlStringPage: string, metaTags: string) {
    return htmlStringPage.replace(CUSTOM_HTML_TAG_COMMENTS.META_TAGS, metaTags)
  }
}