1 files changed, 35 insertions, 5 deletions

diff --git a/server/controllers/client.ts b/server/controllers/client.ts
index aff00fe6e..a29b51c51 100644
--- a/server/controllers/client.ts
+++ b/server/controllers/client.ts
@@ -3,17 +3,24 @@ 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 {
+  ACCEPT_HEADERS,
+  CONFIG,
+  EMBED_SIZE,
+  OPENGRAPH_AND_OEMBED_COMMENT,
+  STATIC_MAX_AGE,
+  STATIC_PATHS
+} from '../initializers'
 import { asyncMiddleware } from '../middlewares'
 import { VideoModel } from '../models/video/video'
 import { VideoPrivacy } from '../../shared/models/videos'
+import { I18N_LOCALES, is18nLocale, getDefaultLocale } from '../../shared/models'
 
 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
@@ -45,6 +52,16 @@ clientsRouter.use('/client/*', (req: express.Request, res: express.Response, nex
   res.sendStatus(404)
 })
 
+// Always serve index client page (the client is a single page application, let it handle routing)
+// Try to provide the right language index.html
+clientsRouter.use('/(:language)?', function (req, res) {
+  if (req.accepts(ACCEPT_HEADERS) === 'html') {
+    return res.sendFile(getIndexPath(req, req.params.language))
+  }
+
+  return res.status(404).end()
+})
+
 // ---------------------------------------------------------------------------
 
 export {
@@ -53,6 +70,19 @@ export {
 
 // ---------------------------------------------------------------------------
 
+function getIndexPath (req: express.Request, paramLang?: string) {
+  let lang: string
+
+  // Check param lang validity
+  if (paramLang && is18nLocale(paramLang)) {
+    lang = paramLang
+  } else {
+    lang = req.acceptsLanguages(Object.keys(I18N_LOCALES)) || getDefaultLocale()
+  }
+
+  return join(__dirname, '../../../client/dist/' + lang + '/index.html')
+}
+
 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
@@ -142,18 +172,18 @@ async function generateWatchHtmlPage (req: express.Request, res: express.Respons
   } else if (validator.isInt(videoId)) {
     videoPromise = VideoModel.loadAndPopulateAccountAndServerAndTags(+videoId)
   } else {
-    return res.sendFile(indexPath)
+    return res.sendFile(getIndexPath(req))
   }
 
   let [ file, video ] = await Promise.all([
-    readFileBufferPromise(indexPath),
+    readFileBufferPromise(getIndexPath(req)),
     videoPromise
   ])
 
   const html = file.toString()
 
   // Let Angular application handle errors
-  if (!video || video.privacy === VideoPrivacy.PRIVATE) return res.sendFile(indexPath)
+  if (!video || video.privacy === VideoPrivacy.PRIVATE) return res.sendFile(getIndexPath(req))
 
   const htmlStringPageWithTags = addOpenGraphAndOEmbedTags(html, video)
   res.set('Content-Type', 'text/html; charset=UTF-8').send(htmlStringPageWithTags)