From d7a25329f9e607894d29ab342b9cb66638b56dc0 Mon Sep 17 00:00:00 2001
From: Chocobozzz <me@florianbigard.com>
Date: Fri, 15 Nov 2019 15:06:03 +0100
Subject: Add ability to disable webtorrent

In favour of HLS
---
 server/helpers/webtorrent.ts | 69 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 66 insertions(+), 3 deletions(-)

(limited to 'server/helpers/webtorrent.ts')

diff --git a/server/helpers/webtorrent.ts b/server/helpers/webtorrent.ts
index d2a22e8f0..f3e41f8d6 100644
--- a/server/helpers/webtorrent.ts
+++ b/server/helpers/webtorrent.ts
@@ -1,11 +1,22 @@
 import { logger } from './logger'
 import { generateVideoImportTmpPath } from './utils'
 import * as WebTorrent from 'webtorrent'
-import { createWriteStream, ensureDir, remove } from 'fs-extra'
+import { createWriteStream, ensureDir, remove, writeFile } from 'fs-extra'
 import { CONFIG } from '../initializers/config'
 import { dirname, join } from 'path'
 import * as createTorrent from 'create-torrent'
 import { promisify2 } from './core-utils'
+import { MVideo } from '@server/typings/models/video/video'
+import { MVideoFile, MVideoFileRedundanciesOpt } from '@server/typings/models/video/video-file'
+import { isStreamingPlaylist, MStreamingPlaylistVideo } from '@server/typings/models/video/video-streaming-playlist'
+import { STATIC_PATHS, WEBSERVER } from '@server/initializers/constants'
+import * as parseTorrent from 'parse-torrent'
+import * as magnetUtil from 'magnet-uri'
+import { isArray } from '@server/helpers/custom-validators/misc'
+import { extractVideo } from '@server/lib/videos'
+import { getTorrentFileName, getVideoFilename, getVideoFilePath } from '@server/lib/video-paths'
+
+const createTorrentPromise = promisify2<string, any, any>(createTorrent)
 
 async function downloadWebTorrentVideo (target: { magnetUri: string, torrentName?: string }, timeout: number) {
   const id = target.magnetUri || target.torrentName
@@ -59,12 +70,64 @@ async function downloadWebTorrentVideo (target: { magnetUri: string, torrentName
   })
 }
 
-const createTorrentPromise = promisify2<string, any, any>(createTorrent)
+async function createTorrentAndSetInfoHash (videoOrPlaylist: MVideo | MStreamingPlaylistVideo, videoFile: MVideoFile) {
+  const video = extractVideo(videoOrPlaylist)
+
+  const options = {
+    // Keep the extname, it's used by the client to stream the file inside a web browser
+    name: `${video.name} ${videoFile.resolution}p${videoFile.extname}`,
+    createdBy: 'PeerTube',
+    announceList: [
+      [ WEBSERVER.WS + '://' + WEBSERVER.HOSTNAME + ':' + WEBSERVER.PORT + '/tracker/socket' ],
+      [ WEBSERVER.URL + '/tracker/announce' ]
+    ],
+    urlList: [ WEBSERVER.URL + STATIC_PATHS.WEBSEED + getVideoFilename(videoOrPlaylist, videoFile) ]
+  }
+
+  const torrent = await createTorrentPromise(getVideoFilePath(videoOrPlaylist, videoFile), options)
+
+  const filePath = join(CONFIG.STORAGE.TORRENTS_DIR, getTorrentFileName(videoOrPlaylist, videoFile))
+  logger.info('Creating torrent %s.', filePath)
+
+  await writeFile(filePath, torrent)
+
+  const parsedTorrent = parseTorrent(torrent)
+  videoFile.infoHash = parsedTorrent.infoHash
+}
+
+function generateMagnetUri (
+  videoOrPlaylist: MVideo | MStreamingPlaylistVideo,
+  videoFile: MVideoFileRedundanciesOpt,
+  baseUrlHttp: string,
+  baseUrlWs: string
+) {
+  const video = isStreamingPlaylist(videoOrPlaylist)
+    ? videoOrPlaylist.Video
+    : videoOrPlaylist
+
+  const xs = videoOrPlaylist.getTorrentUrl(videoFile, baseUrlHttp)
+  const announce = videoOrPlaylist.getTrackerUrls(baseUrlHttp, baseUrlWs)
+  let urlList = [ videoOrPlaylist.getVideoFileUrl(videoFile, baseUrlHttp) ]
+
+  const redundancies = videoFile.RedundancyVideos
+  if (isArray(redundancies)) urlList = urlList.concat(redundancies.map(r => r.fileUrl))
+
+  const magnetHash = {
+    xs,
+    announce,
+    urlList,
+    infoHash: videoFile.infoHash,
+    name: video.name
+  }
+
+  return magnetUtil.encode(magnetHash)
+}
 
 // ---------------------------------------------------------------------------
 
 export {
-  createTorrentPromise,
+  createTorrentAndSetInfoHash,
+  generateMagnetUri,
   downloadWebTorrentVideo
 }
 
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