Move createTorrent in webtorrent utils

[github/Chocobozzz/PeerTube.git] / server / helpers / webtorrent.ts

diff --git a/server/helpers/webtorrent.ts b/server/helpers/webtorrent.ts
index d35b3a7108d643f2e3110c514dd76d8978cc7ee0..d2a22e8f0e9b79ffbc75d3ae2ff3f27a6618a547 100644 (file)
--- a/server/helpers/webtorrent.ts
+++ b/server/helpers/webtorrent.ts
@@ -1,73 +1,108 @@
 import { logger } from './logger'
-import { generateVideoTmpPath } from './utils'
+import { generateVideoImportTmpPath } from './utils'
 import * as WebTorrent from 'webtorrent'
-import { remove } from 'fs-extra'
-import { CONFIG } from '../initializers'
-import { join } from 'path'
+import { createWriteStream, ensureDir, remove } from 'fs-extra'
+import { CONFIG } from '../initializers/config'
+import { dirname, join } from 'path'
+import * as createTorrent from 'create-torrent'
+import { promisify2 } from './core-utils'
 
-function downloadWebTorrentVideo (target: { magnetUri: string, torrentName?: string }, timeout?: number) {
+async function downloadWebTorrentVideo (target: { magnetUri: string, torrentName?: string }, timeout: number) {
   const id = target.magnetUri || target.torrentName
   let timer
 
+  const path = generateVideoImportTmpPath(id)
   logger.info('Importing torrent video %s', id)
 
+  const directoryPath = join(CONFIG.STORAGE.TMP_DIR, 'webtorrent')
+  await ensureDir(directoryPath)
+
   return new Promise<string>((res, rej) => {
     const webtorrent = new WebTorrent()
     let file: WebTorrent.TorrentFile
 
     const torrentId = target.magnetUri || join(CONFIG.STORAGE.TORRENTS_DIR, target.torrentName)
 
-    const options = { path: CONFIG.STORAGE.VIDEOS_DIR }
+    const options = { path: directoryPath }
     const torrent = webtorrent.add(torrentId, options, torrent => {
       if (torrent.files.length !== 1) {
         if (timer) clearTimeout(timer)
 
-        return safeWebtorrentDestroy(webtorrent, torrentId, file.name, target.torrentName)
+        for (let file of torrent.files) {
+          deleteDownloadedFile({ directoryPath, filepath: file.path })
+        }
+
+        return safeWebtorrentDestroy(webtorrent, torrentId, undefined, target.torrentName)
           .then(() => rej(new Error('Cannot import torrent ' + torrentId + ': there are multiple files in it')))
       }
 
-      torrent.on('done', () => res(join(CONFIG.STORAGE.VIDEOS_DIR, torrent.files[ 0 ].path)))
+      file = torrent.files[ 0 ]
+
+      // FIXME: avoid creating another stream when https://github.com/webtorrent/webtorrent/issues/1517 is fixed
+      const writeStream = createWriteStream(path)
+      writeStream.on('finish', () => {
+        if (timer) clearTimeout(timer)
+
+        return safeWebtorrentDestroy(webtorrent, torrentId, { directoryPath, filepath: file.path }, target.torrentName)
+          .then(() => res(path))
+      })
+
+      file.createReadStream().pipe(writeStream)
     })
 
     torrent.on('error', err => rej(err))
 
-    if (timeout) {
-      timer = setTimeout(async () => {
-        return safeWebtorrentDestroy(webtorrent, torrentId, file ? file.name : undefined, target.torrentName)
-          .then(() => rej(new Error('Webtorrent download timeout.')))
-      }, timeout)
-    }
+    timer = setTimeout(async () => {
+      return safeWebtorrentDestroy(webtorrent, torrentId, file ? { directoryPath, filepath: file.path } : undefined, target.torrentName)
+        .then(() => rej(new Error('Webtorrent download timeout.')))
+    }, timeout)
   })
 }
 
+const createTorrentPromise = promisify2<string, any, any>(createTorrent)
+
 // ---------------------------------------------------------------------------
 
 export {
+  createTorrentPromise,
   downloadWebTorrentVideo
 }
 
 // ---------------------------------------------------------------------------
 
-function safeWebtorrentDestroy (webtorrent: WebTorrent.Instance, torrentId: string, filename?: string, torrentName?: string) {
+function safeWebtorrentDestroy (
+  webtorrent: WebTorrent.Instance,
+  torrentId: string,
+  downloadedFile?: { directoryPath: string, filepath: string },
+  torrentName?: string
+) {
   return new Promise(res => {
     webtorrent.destroy(err => {
       // Delete torrent file
       if (torrentName) {
+        logger.debug('Removing %s torrent after webtorrent download.', torrentId)
         remove(torrentId)
           .catch(err => logger.error('Cannot remove torrent %s in webtorrent download.', torrentId, { err }))
       }
 
       // Delete downloaded file
-      if (filename) {
-        remove(join(CONFIG.STORAGE.VIDEOS_DIR, filename))
-          .catch(err => logger.error('Cannot remove torrent file %s in webtorrent download.', filename, { err }))
-      }
+      if (downloadedFile) deleteDownloadedFile(downloadedFile)
 
-      if (err) {
-        logger.warn('Cannot destroy webtorrent in timeout.', { err })
-      }
+      if (err) logger.warn('Cannot destroy webtorrent in timeout.', { err })
 
       return res()
     })
   })
 }
+
+function deleteDownloadedFile (downloadedFile: { directoryPath: string, filepath: string }) {
+  // We want to delete the base directory
+  let pathToDelete = dirname(downloadedFile.filepath)
+  if (pathToDelete === '.') pathToDelete = downloadedFile.filepath
+
+  const toRemovePath = join(downloadedFile.directoryPath, pathToDelete)
+
+  logger.debug('Removing %s after webtorrent download.', toRemovePath)
+  remove(toRemovePath)
+    .catch(err => logger.error('Cannot remove torrent file %s in webtorrent download.', toRemovePath, { err }))
+}