Add tmp and redundancy directories

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

diff --git a/server/helpers/webtorrent.ts b/server/helpers/webtorrent.ts
index fce88a1f64f5356e736516d4fa13a7ed7225ae95..3c9a0b96ae87b21d942da729634c1e4250b4766a 100644 (file)
--- a/server/helpers/webtorrent.ts
+++ b/server/helpers/webtorrent.ts
@@ -1,26 +1,59 @@
 import { logger } from './logger'
-import { generateVideoTmpPath } from './utils'
+import { generateVideoImportTmpPath } from './utils'
 import * as WebTorrent from 'webtorrent'
-import { createWriteStream } from 'fs'
+import { createWriteStream, ensureDir, remove } from 'fs-extra'
+import { CONFIG } from '../initializers'
+import { dirname, join } from 'path'
 
-function downloadWebTorrentVideo (target: string) {
-  const path = generateVideoTmpPath(target)
+async function downloadWebTorrentVideo (target: { magnetUri: string, torrentName?: string }, timeout: number) {
+  const id = target.magnetUri || target.torrentName
+  let timer
 
-  logger.info('Importing torrent video %s', target)
+  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 torrent = webtorrent.add(target, torrent => {
-      if (torrent.files.length !== 1) throw new Error('The number of files is not equal to 1 for ' + target)
+    const torrentId = target.magnetUri || join(CONFIG.STORAGE.TORRENTS_DIR, target.torrentName)
 
-      const file = torrent.files[ 0 ]
-      file.createReadStream().pipe(createWriteStream(path))
-    })
+    const options = { path: directoryPath }
+    const torrent = webtorrent.add(torrentId, options, torrent => {
+      if (torrent.files.length !== 1) {
+        if (timer) clearTimeout(timer)
+
+        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')))
+      }
+
+      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)
 
-    torrent.on('done', () => res(path))
+        return safeWebtorrentDestroy(webtorrent, torrentId, { directoryPath, filepath: file.path }, target.torrentName)
+          .then(() => res(path))
+      })
+
+      file.createReadStream().pipe(writeStream)
+    })
 
     torrent.on('error', err => rej(err))
+
+    timer = setTimeout(async () => {
+      return safeWebtorrentDestroy(webtorrent, torrentId, file ? { directoryPath, filepath: file.path } : undefined, target.torrentName)
+        .then(() => rej(new Error('Webtorrent download timeout.')))
+    }, timeout)
   })
 }
 
@@ -29,3 +62,42 @@ function downloadWebTorrentVideo (target: string) {
 export {
   downloadWebTorrentVideo
 }
+
+// ---------------------------------------------------------------------------
+
+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 (downloadedFile) deleteDownloadedFile(downloadedFile)
+
+      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 }))
+}