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1 | import { close, ensureDir, move, open, outputJSON, read, readFile, remove, stat, writeFile } from 'fs-extra' | |
2 | import { flatten, uniq } from 'lodash' | |
3 | import { basename, dirname, join } from 'path' | |
4 | import { MStreamingPlaylistFilesVideo, MVideo, MVideoUUID } from '@server/types/models' | |
5 | import { sha256 } from '../helpers/core-utils' | |
6 | import { getAudioStreamCodec, getVideoStreamCodec, getVideoStreamSize } from '../helpers/ffprobe-utils' | |
7 | import { logger } from '../helpers/logger' | |
8 | import { doRequest, doRequestAndSaveToFile } from '../helpers/requests' | |
9 | import { generateRandomString } from '../helpers/utils' | |
10 | import { CONFIG } from '../initializers/config' | |
11 | import { P2P_MEDIA_LOADER_PEER_VERSION, REQUEST_TIMEOUTS } from '../initializers/constants' | |
12 | import { sequelizeTypescript } from '../initializers/database' | |
13 | import { VideoFileModel } from '../models/video/video-file' | |
14 | import { VideoStreamingPlaylistModel } from '../models/video/video-streaming-playlist' | |
15 | import { getHlsResolutionPlaylistFilename } from './paths' | |
16 | import { VideoPathManager } from './video-path-manager' | |
17 | ||
18 | async function updateStreamingPlaylistsInfohashesIfNeeded () { | |
19 | const playlistsToUpdate = await VideoStreamingPlaylistModel.listByIncorrectPeerVersion() | |
20 | ||
21 | // Use separate SQL queries, because we could have many videos to update | |
22 | for (const playlist of playlistsToUpdate) { | |
23 | await sequelizeTypescript.transaction(async t => { | |
24 | const videoFiles = await VideoFileModel.listByStreamingPlaylist(playlist.id, t) | |
25 | ||
26 | playlist.assignP2PMediaLoaderInfoHashes(playlist.Video, videoFiles) | |
27 | playlist.p2pMediaLoaderPeerVersion = P2P_MEDIA_LOADER_PEER_VERSION | |
28 | ||
29 | await playlist.save({ transaction: t }) | |
30 | }) | |
31 | } | |
32 | } | |
33 | ||
34 | async function updateMasterHLSPlaylist (video: MVideo, playlist: MStreamingPlaylistFilesVideo) { | |
35 | const masterPlaylists: string[] = [ '#EXTM3U', '#EXT-X-VERSION:3' ] | |
36 | ||
37 | for (const file of playlist.VideoFiles) { | |
38 | const playlistFilename = getHlsResolutionPlaylistFilename(file.filename) | |
39 | ||
40 | await VideoPathManager.Instance.makeAvailableVideoFile(file.withVideoOrPlaylist(playlist), async videoFilePath => { | |
41 | const size = await getVideoStreamSize(videoFilePath) | |
42 | ||
43 | const bandwidth = 'BANDWIDTH=' + video.getBandwidthBits(file) | |
44 | const resolution = `RESOLUTION=${size.width}x${size.height}` | |
45 | ||
46 | let line = `#EXT-X-STREAM-INF:${bandwidth},${resolution}` | |
47 | if (file.fps) line += ',FRAME-RATE=' + file.fps | |
48 | ||
49 | const codecs = await Promise.all([ | |
50 | getVideoStreamCodec(videoFilePath), | |
51 | getAudioStreamCodec(videoFilePath) | |
52 | ]) | |
53 | ||
54 | line += `,CODECS="${codecs.filter(c => !!c).join(',')}"` | |
55 | ||
56 | masterPlaylists.push(line) | |
57 | masterPlaylists.push(playlistFilename) | |
58 | }) | |
59 | } | |
60 | ||
61 | await VideoPathManager.Instance.makeAvailablePlaylistFile(playlist, playlist.playlistFilename, masterPlaylistPath => { | |
62 | return writeFile(masterPlaylistPath, masterPlaylists.join('\n') + '\n') | |
63 | }) | |
64 | } | |
65 | ||
66 | async function updateSha256VODSegments (video: MVideoUUID, playlist: MStreamingPlaylistFilesVideo) { | |
67 | const json: { [filename: string]: { [range: string]: string } } = {} | |
68 | ||
69 | // For all the resolutions available for this video | |
70 | for (const file of playlist.VideoFiles) { | |
71 | const rangeHashes: { [range: string]: string } = {} | |
72 | const fileWithPlaylist = file.withVideoOrPlaylist(playlist) | |
73 | ||
74 | await VideoPathManager.Instance.makeAvailableVideoFile(fileWithPlaylist, videoPath => { | |
75 | ||
76 | return VideoPathManager.Instance.makeAvailableResolutionPlaylistFile(fileWithPlaylist, async resolutionPlaylistPath => { | |
77 | const playlistContent = await readFile(resolutionPlaylistPath) | |
78 | const ranges = getRangesFromPlaylist(playlistContent.toString()) | |
79 | ||
80 | const fd = await open(videoPath, 'r') | |
81 | for (const range of ranges) { | |
82 | const buf = Buffer.alloc(range.length) | |
83 | await read(fd, buf, 0, range.length, range.offset) | |
84 | ||
85 | rangeHashes[`${range.offset}-${range.offset + range.length - 1}`] = sha256(buf) | |
86 | } | |
87 | await close(fd) | |
88 | ||
89 | const videoFilename = file.filename | |
90 | json[videoFilename] = rangeHashes | |
91 | }) | |
92 | }) | |
93 | } | |
94 | ||
95 | const outputPath = VideoPathManager.Instance.getFSHLSOutputPath(video, playlist.segmentsSha256Filename) | |
96 | await outputJSON(outputPath, json) | |
97 | } | |
98 | ||
99 | async function buildSha256Segment (segmentPath: string) { | |
100 | const buf = await readFile(segmentPath) | |
101 | return sha256(buf) | |
102 | } | |
103 | ||
104 | function downloadPlaylistSegments (playlistUrl: string, destinationDir: string, timeout: number, bodyKBLimit: number) { | |
105 | let timer | |
106 | let remainingBodyKBLimit = bodyKBLimit | |
107 | ||
108 | logger.info('Importing HLS playlist %s', playlistUrl) | |
109 | ||
110 | return new Promise<void>(async (res, rej) => { | |
111 | const tmpDirectory = join(CONFIG.STORAGE.TMP_DIR, await generateRandomString(10)) | |
112 | ||
113 | await ensureDir(tmpDirectory) | |
114 | ||
115 | timer = setTimeout(() => { | |
116 | deleteTmpDirectory(tmpDirectory) | |
117 | ||
118 | return rej(new Error('HLS download timeout.')) | |
119 | }, timeout) | |
120 | ||
121 | try { | |
122 | // Fetch master playlist | |
123 | const subPlaylistUrls = await fetchUniqUrls(playlistUrl) | |
124 | ||
125 | const subRequests = subPlaylistUrls.map(u => fetchUniqUrls(u)) | |
126 | const fileUrls = uniq(flatten(await Promise.all(subRequests))) | |
127 | ||
128 | logger.debug('Will download %d HLS files.', fileUrls.length, { fileUrls }) | |
129 | ||
130 | for (const fileUrl of fileUrls) { | |
131 | const destPath = join(tmpDirectory, basename(fileUrl)) | |
132 | ||
133 | await doRequestAndSaveToFile(fileUrl, destPath, { bodyKBLimit: remainingBodyKBLimit, timeout: REQUEST_TIMEOUTS.REDUNDANCY }) | |
134 | ||
135 | const { size } = await stat(destPath) | |
136 | remainingBodyKBLimit -= (size / 1000) | |
137 | ||
138 | logger.debug('Downloaded HLS playlist file %s with %d kB remained limit.', fileUrl, Math.floor(remainingBodyKBLimit)) | |
139 | } | |
140 | ||
141 | clearTimeout(timer) | |
142 | ||
143 | await move(tmpDirectory, destinationDir, { overwrite: true }) | |
144 | ||
145 | return res() | |
146 | } catch (err) { | |
147 | deleteTmpDirectory(tmpDirectory) | |
148 | ||
149 | return rej(err) | |
150 | } | |
151 | }) | |
152 | ||
153 | function deleteTmpDirectory (directory: string) { | |
154 | remove(directory) | |
155 | .catch(err => logger.error('Cannot delete path on HLS download error.', { err })) | |
156 | } | |
157 | ||
158 | async function fetchUniqUrls (playlistUrl: string) { | |
159 | const { body } = await doRequest(playlistUrl) | |
160 | ||
161 | if (!body) return [] | |
162 | ||
163 | const urls = body.split('\n') | |
164 | .filter(line => line.endsWith('.m3u8') || line.endsWith('.mp4')) | |
165 | .map(url => { | |
166 | if (url.startsWith('http://') || url.startsWith('https://')) return url | |
167 | ||
168 | return `${dirname(playlistUrl)}/${url}` | |
169 | }) | |
170 | ||
171 | return uniq(urls) | |
172 | } | |
173 | } | |
174 | ||
175 | // --------------------------------------------------------------------------- | |
176 | ||
177 | export { | |
178 | updateMasterHLSPlaylist, | |
179 | updateSha256VODSegments, | |
180 | buildSha256Segment, | |
181 | downloadPlaylistSegments, | |
182 | updateStreamingPlaylistsInfohashesIfNeeded | |
183 | } | |
184 | ||
185 | // --------------------------------------------------------------------------- | |
186 | ||
187 | function getRangesFromPlaylist (playlistContent: string) { | |
188 | const ranges: { offset: number, length: number }[] = [] | |
189 | const lines = playlistContent.split('\n') | |
190 | const regex = /^#EXT-X-BYTERANGE:(\d+)@(\d+)$/ | |
191 | ||
192 | for (const line of lines) { | |
193 | const captured = regex.exec(line) | |
194 | ||
195 | if (captured) { | |
196 | ranges.push({ length: parseInt(captured[1], 10), offset: parseInt(captured[2], 10) }) | |
197 | } | |
198 | } | |
199 | ||
200 | return ranges | |
201 | } |