201 lines
7.1 KiB
TypeScript
201 lines
7.1 KiB
TypeScript
import { basename, dirname, join } from 'path'
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import { HLS_STREAMING_PLAYLIST_DIRECTORY, P2P_MEDIA_LOADER_PEER_VERSION } from '../initializers/constants'
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import { close, ensureDir, move, open, outputJSON, pathExists, read, readFile, remove, writeFile } from 'fs-extra'
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import { getVideoStreamSize, getAudioStreamCodec, getVideoStreamCodec } from '../helpers/ffmpeg-utils'
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import { sha256 } from '../helpers/core-utils'
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import { VideoStreamingPlaylistModel } from '../models/video/video-streaming-playlist'
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import { logger } from '../helpers/logger'
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import { doRequest, doRequestAndSaveToFile } from '../helpers/requests'
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import { generateRandomString } from '../helpers/utils'
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import { flatten, uniq } from 'lodash'
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import { VideoFileModel } from '../models/video/video-file'
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import { CONFIG } from '../initializers/config'
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import { sequelizeTypescript } from '../initializers/database'
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import { MVideoWithFile } from '@server/types/models'
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import { getVideoFilename, getVideoFilePath } from './video-paths'
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async function updateStreamingPlaylistsInfohashesIfNeeded () {
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const playlistsToUpdate = await VideoStreamingPlaylistModel.listByIncorrectPeerVersion()
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// Use separate SQL queries, because we could have many videos to update
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for (const playlist of playlistsToUpdate) {
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await sequelizeTypescript.transaction(async t => {
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const videoFiles = await VideoFileModel.listByStreamingPlaylist(playlist.id, t)
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playlist.p2pMediaLoaderInfohashes = VideoStreamingPlaylistModel.buildP2PMediaLoaderInfoHashes(playlist.playlistUrl, videoFiles)
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playlist.p2pMediaLoaderPeerVersion = P2P_MEDIA_LOADER_PEER_VERSION
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await playlist.save({ transaction: t })
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})
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}
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}
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async function updateMasterHLSPlaylist (video: MVideoWithFile) {
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const directory = join(HLS_STREAMING_PLAYLIST_DIRECTORY, video.uuid)
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const masterPlaylists: string[] = [ '#EXTM3U', '#EXT-X-VERSION:3' ]
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const masterPlaylistPath = join(directory, VideoStreamingPlaylistModel.getMasterHlsPlaylistFilename())
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const streamingPlaylist = video.getHLSPlaylist()
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for (const file of streamingPlaylist.VideoFiles) {
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// If we did not generated a playlist for this resolution, skip
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const filePlaylistPath = join(directory, VideoStreamingPlaylistModel.getHlsPlaylistFilename(file.resolution))
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if (await pathExists(filePlaylistPath) === false) continue
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const videoFilePath = getVideoFilePath(streamingPlaylist, file)
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const size = await getVideoStreamSize(videoFilePath)
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const bandwidth = 'BANDWIDTH=' + video.getBandwidthBits(file)
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const resolution = `RESOLUTION=${size.width}x${size.height}`
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let line = `#EXT-X-STREAM-INF:${bandwidth},${resolution}`
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if (file.fps) line += ',FRAME-RATE=' + file.fps
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const videoCodec = await getVideoStreamCodec(videoFilePath)
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line += `,CODECS="${videoCodec}`
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const audioCodec = await getAudioStreamCodec(videoFilePath)
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if (audioCodec) line += `,${audioCodec}`
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line += '"'
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masterPlaylists.push(line)
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masterPlaylists.push(VideoStreamingPlaylistModel.getHlsPlaylistFilename(file.resolution))
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}
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await writeFile(masterPlaylistPath, masterPlaylists.join('\n') + '\n')
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}
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async function updateSha256VODSegments (video: MVideoWithFile) {
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const json: { [filename: string]: { [range: string]: string } } = {}
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const playlistDirectory = join(HLS_STREAMING_PLAYLIST_DIRECTORY, video.uuid)
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const hlsPlaylist = video.getHLSPlaylist()
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// For all the resolutions available for this video
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for (const file of hlsPlaylist.VideoFiles) {
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const rangeHashes: { [range: string]: string } = {}
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const videoPath = getVideoFilePath(hlsPlaylist, file)
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const playlistPath = join(playlistDirectory, VideoStreamingPlaylistModel.getHlsPlaylistFilename(file.resolution))
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// Maybe the playlist is not generated for this resolution yet
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if (!await pathExists(playlistPath)) continue
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const playlistContent = await readFile(playlistPath)
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const ranges = getRangesFromPlaylist(playlistContent.toString())
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const fd = await open(videoPath, 'r')
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for (const range of ranges) {
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const buf = Buffer.alloc(range.length)
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await read(fd, buf, 0, range.length, range.offset)
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rangeHashes[`${range.offset}-${range.offset + range.length - 1}`] = sha256(buf)
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}
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await close(fd)
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const videoFilename = getVideoFilename(hlsPlaylist, file)
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json[videoFilename] = rangeHashes
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}
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const outputPath = join(playlistDirectory, VideoStreamingPlaylistModel.getHlsSha256SegmentsFilename())
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await outputJSON(outputPath, json)
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}
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async function buildSha256Segment (segmentPath: string) {
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const buf = await readFile(segmentPath)
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return sha256(buf)
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}
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function getRangesFromPlaylist (playlistContent: string) {
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const ranges: { offset: number, length: number }[] = []
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const lines = playlistContent.split('\n')
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const regex = /^#EXT-X-BYTERANGE:(\d+)@(\d+)$/
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for (const line of lines) {
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const captured = regex.exec(line)
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if (captured) {
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ranges.push({ length: parseInt(captured[1], 10), offset: parseInt(captured[2], 10) })
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}
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}
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return ranges
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}
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function downloadPlaylistSegments (playlistUrl: string, destinationDir: string, timeout: number) {
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let timer
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logger.info('Importing HLS playlist %s', playlistUrl)
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return new Promise<string>(async (res, rej) => {
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const tmpDirectory = join(CONFIG.STORAGE.TMP_DIR, await generateRandomString(10))
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await ensureDir(tmpDirectory)
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timer = setTimeout(() => {
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deleteTmpDirectory(tmpDirectory)
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return rej(new Error('HLS download timeout.'))
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}, timeout)
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try {
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// Fetch master playlist
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const subPlaylistUrls = await fetchUniqUrls(playlistUrl)
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const subRequests = subPlaylistUrls.map(u => fetchUniqUrls(u))
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const fileUrls = uniq(flatten(await Promise.all(subRequests)))
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logger.debug('Will download %d HLS files.', fileUrls.length, { fileUrls })
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for (const fileUrl of fileUrls) {
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const destPath = join(tmpDirectory, basename(fileUrl))
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const bodyKBLimit = 10 * 1000 * 1000 // 10GB
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await doRequestAndSaveToFile({ uri: fileUrl }, destPath, bodyKBLimit)
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}
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clearTimeout(timer)
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await move(tmpDirectory, destinationDir, { overwrite: true })
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return res()
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} catch (err) {
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deleteTmpDirectory(tmpDirectory)
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return rej(err)
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}
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})
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function deleteTmpDirectory (directory: string) {
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remove(directory)
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.catch(err => logger.error('Cannot delete path on HLS download error.', { err }))
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}
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async function fetchUniqUrls (playlistUrl: string) {
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const { body } = await doRequest<string>({ uri: playlistUrl })
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if (!body) return []
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const urls = body.split('\n')
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.filter(line => line.endsWith('.m3u8') || line.endsWith('.mp4'))
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.map(url => {
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if (url.startsWith('http://') || url.startsWith('https://')) return url
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return `${dirname(playlistUrl)}/${url}`
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})
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return uniq(urls)
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}
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}
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// ---------------------------------------------------------------------------
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export {
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updateMasterHLSPlaylist,
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updateSha256VODSegments,
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buildSha256Segment,
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downloadPlaylistSegments,
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updateStreamingPlaylistsInfohashesIfNeeded
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}
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// ---------------------------------------------------------------------------
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