import { close, ensureDir, move, open, outputJSON, pathExists, read, readFile, remove, stat, writeFile } from 'fs-extra' import { flatten, uniq } from 'lodash' import { basename, dirname, join } from 'path' import { MStreamingPlaylistFilesVideo, MVideoWithFile } from '@server/types/models' import { sha256 } from '../helpers/core-utils' import { getAudioStreamCodec, getVideoStreamCodec, getVideoStreamSize } from '../helpers/ffprobe-utils' import { logger } from '../helpers/logger' import { doRequest, doRequestAndSaveToFile } from '../helpers/requests' import { generateRandomString } from '../helpers/utils' import { CONFIG } from '../initializers/config' import { HLS_STREAMING_PLAYLIST_DIRECTORY, P2P_MEDIA_LOADER_PEER_VERSION } from '../initializers/constants' import { sequelizeTypescript } from '../initializers/database' import { VideoFileModel } from '../models/video/video-file' import { VideoStreamingPlaylistModel } from '../models/video/video-streaming-playlist' import { getHlsResolutionPlaylistFilename, getVideoFilePath } from './video-paths' async function updateStreamingPlaylistsInfohashesIfNeeded () { const playlistsToUpdate = await VideoStreamingPlaylistModel.listByIncorrectPeerVersion() // Use separate SQL queries, because we could have many videos to update for (const playlist of playlistsToUpdate) { await sequelizeTypescript.transaction(async t => { const videoFiles = await VideoFileModel.listByStreamingPlaylist(playlist.id, t) playlist.assignP2PMediaLoaderInfoHashes(playlist.Video, videoFiles) playlist.p2pMediaLoaderPeerVersion = P2P_MEDIA_LOADER_PEER_VERSION await playlist.save({ transaction: t }) }) } } async function updateMasterHLSPlaylist (video: MVideoWithFile, playlist: MStreamingPlaylistFilesVideo) { const directory = join(HLS_STREAMING_PLAYLIST_DIRECTORY, video.uuid) const masterPlaylists: string[] = [ '#EXTM3U', '#EXT-X-VERSION:3' ] const masterPlaylistPath = join(directory, playlist.playlistFilename) for (const file of playlist.VideoFiles) { const playlistFilename = getHlsResolutionPlaylistFilename(file.filename) // If we did not generated a playlist for this resolution, skip const filePlaylistPath = join(directory, playlistFilename) if (await pathExists(filePlaylistPath) === false) continue const videoFilePath = getVideoFilePath(playlist, file) const size = await getVideoStreamSize(videoFilePath) const bandwidth = 'BANDWIDTH=' + video.getBandwidthBits(file) const resolution = `RESOLUTION=${size.width}x${size.height}` let line = `#EXT-X-STREAM-INF:${bandwidth},${resolution}` if (file.fps) line += ',FRAME-RATE=' + file.fps const codecs = await Promise.all([ getVideoStreamCodec(videoFilePath), getAudioStreamCodec(videoFilePath) ]) line += `,CODECS="${codecs.filter(c => !!c).join(',')}"` masterPlaylists.push(line) masterPlaylists.push(playlistFilename) } await writeFile(masterPlaylistPath, masterPlaylists.join('\n') + '\n') } async function updateSha256VODSegments (video: MVideoWithFile, playlist: MStreamingPlaylistFilesVideo) { const json: { [filename: string]: { [range: string]: string } } = {} const playlistDirectory = join(HLS_STREAMING_PLAYLIST_DIRECTORY, video.uuid) // For all the resolutions available for this video for (const file of playlist.VideoFiles) { const rangeHashes: { [range: string]: string } = {} const videoPath = getVideoFilePath(playlist, file) const resolutionPlaylistPath = join(playlistDirectory, getHlsResolutionPlaylistFilename(file.filename)) // Maybe the playlist is not generated for this resolution yet if (!await pathExists(resolutionPlaylistPath)) continue const playlistContent = await readFile(resolutionPlaylistPath) const ranges = getRangesFromPlaylist(playlistContent.toString()) const fd = await open(videoPath, 'r') for (const range of ranges) { const buf = Buffer.alloc(range.length) await read(fd, buf, 0, range.length, range.offset) rangeHashes[`${range.offset}-${range.offset + range.length - 1}`] = sha256(buf) } await close(fd) const videoFilename = file.filename json[videoFilename] = rangeHashes } const outputPath = join(playlistDirectory, playlist.segmentsSha256Filename) await outputJSON(outputPath, json) } async function buildSha256Segment (segmentPath: string) { const buf = await readFile(segmentPath) return sha256(buf) } function downloadPlaylistSegments (playlistUrl: string, destinationDir: string, timeout: number, bodyKBLimit: number) { let timer let remainingBodyKBLimit = bodyKBLimit logger.info('Importing HLS playlist %s', playlistUrl) return new Promise(async (res, rej) => { const tmpDirectory = join(CONFIG.STORAGE.TMP_DIR, await generateRandomString(10)) await ensureDir(tmpDirectory) timer = setTimeout(() => { deleteTmpDirectory(tmpDirectory) return rej(new Error('HLS download timeout.')) }, timeout) try { // Fetch master playlist const subPlaylistUrls = await fetchUniqUrls(playlistUrl) const subRequests = subPlaylistUrls.map(u => fetchUniqUrls(u)) const fileUrls = uniq(flatten(await Promise.all(subRequests))) logger.debug('Will download %d HLS files.', fileUrls.length, { fileUrls }) for (const fileUrl of fileUrls) { const destPath = join(tmpDirectory, basename(fileUrl)) await doRequestAndSaveToFile(fileUrl, destPath, { bodyKBLimit: remainingBodyKBLimit }) const { size } = await stat(destPath) remainingBodyKBLimit -= (size / 1000) logger.debug('Downloaded HLS playlist file %s with %d kB remained limit.', fileUrl, Math.floor(remainingBodyKBLimit)) } clearTimeout(timer) await move(tmpDirectory, destinationDir, { overwrite: true }) return res() } catch (err) { deleteTmpDirectory(tmpDirectory) return rej(err) } }) function deleteTmpDirectory (directory: string) { remove(directory) .catch(err => logger.error('Cannot delete path on HLS download error.', { err })) } async function fetchUniqUrls (playlistUrl: string) { const { body } = await doRequest(playlistUrl) if (!body) return [] const urls = body.split('\n') .filter(line => line.endsWith('.m3u8') || line.endsWith('.mp4')) .map(url => { if (url.startsWith('http://') || url.startsWith('https://')) return url return `${dirname(playlistUrl)}/${url}` }) return uniq(urls) } } // --------------------------------------------------------------------------- export { updateMasterHLSPlaylist, updateSha256VODSegments, buildSha256Segment, downloadPlaylistSegments, updateStreamingPlaylistsInfohashesIfNeeded } // --------------------------------------------------------------------------- function getRangesFromPlaylist (playlistContent: string) { const ranges: { offset: number, length: number }[] = [] const lines = playlistContent.split('\n') const regex = /^#EXT-X-BYTERANGE:(\d+)@(\d+)$/ for (const line of lines) { const captured = regex.exec(line) if (captured) { ranges.push({ length: parseInt(captured[1], 10), offset: parseInt(captured[2], 10) }) } } return ranges }