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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, MVideoWithFile } 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 } 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: MVideoWithFile, 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(playlist, file, 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="${codecs.filter(c => !!c).join(',')}"` | |
55 | ||
56 | masterPlaylists.push(line) | |
57 | masterPlaylists.push(playlistFilename) | |
58 | }) | |
59 | } | |
60 | ||
61 | await VideoPathManager.Instance.makeAvailablePlaylistFile(playlist, playlist.playlistFilename, masterPlaylistPath => { | |
62 | return writeFile(masterPlaylistPath, masterPlaylists.join('\n') + '\n') | |
63 | }) | |
64 | } | |
65 | ||
66 | async function updateSha256VODSegments (video: MVideoWithFile, playlist: MStreamingPlaylistFilesVideo) { | |
67 | const json: { [filename: string]: { [range: string]: string } } = {} | |
68 | ||
69 | // For all the resolutions available for this video | |
70 | for (const file of playlist.VideoFiles) { | |
71 | const rangeHashes: { [range: string]: string } = {} | |
72 | ||
73 | await VideoPathManager.Instance.makeAvailableVideoFile(playlist, file, videoPath => { | |
74 | ||
75 | return VideoPathManager.Instance.makeAvailableResolutionPlaylistFile(playlist, file, async resolutionPlaylistPath => { | |
76 | const playlistContent = await readFile(resolutionPlaylistPath) | |
77 | const ranges = getRangesFromPlaylist(playlistContent.toString()) | |
78 | ||
79 | const fd = await open(videoPath, 'r') | |
80 | for (const range of ranges) { | |
81 | const buf = Buffer.alloc(range.length) | |
82 | await read(fd, buf, 0, range.length, range.offset) | |
83 | ||
84 | rangeHashes[`${range.offset}-${range.offset + range.length - 1}`] = sha256(buf) | |
85 | } | |
86 | await close(fd) | |
87 | ||
88 | const videoFilename = file.filename | |
89 | json[videoFilename] = rangeHashes | |
90 | }) | |
91 | }) | |
92 | } | |
93 | ||
94 | const outputPath = VideoPathManager.Instance.getFSHLSOutputPath(video, playlist.segmentsSha256Filename) | |
95 | await outputJSON(outputPath, json) | |
96 | } | |
97 | ||
98 | async function buildSha256Segment (segmentPath: string) { | |
99 | const buf = await readFile(segmentPath) | |
100 | return sha256(buf) | |
101 | } | |
102 | ||
103 | function downloadPlaylistSegments (playlistUrl: string, destinationDir: string, timeout: number, bodyKBLimit: number) { | |
104 | let timer | |
105 | let remainingBodyKBLimit = bodyKBLimit | |
106 | ||
107 | logger.info('Importing HLS playlist %s', playlistUrl) | |
108 | ||
109 | return new Promise<void>(async (res, rej) => { | |
110 | const tmpDirectory = join(CONFIG.STORAGE.TMP_DIR, await generateRandomString(10)) | |
111 | ||
112 | await ensureDir(tmpDirectory) | |
113 | ||
114 | timer = setTimeout(() => { | |
115 | deleteTmpDirectory(tmpDirectory) | |
116 | ||
117 | return rej(new Error('HLS download timeout.')) | |
118 | }, timeout) | |
119 | ||
120 | try { | |
121 | // Fetch master playlist | |
122 | const subPlaylistUrls = await fetchUniqUrls(playlistUrl) | |
123 | ||
124 | const subRequests = subPlaylistUrls.map(u => fetchUniqUrls(u)) | |
125 | const fileUrls = uniq(flatten(await Promise.all(subRequests))) | |
126 | ||
127 | logger.debug('Will download %d HLS files.', fileUrls.length, { fileUrls }) | |
128 | ||
129 | for (const fileUrl of fileUrls) { | |
130 | const destPath = join(tmpDirectory, basename(fileUrl)) | |
131 | ||
132 | await doRequestAndSaveToFile(fileUrl, destPath, { bodyKBLimit: remainingBodyKBLimit }) | |
133 | ||
134 | const { size } = await stat(destPath) | |
135 | remainingBodyKBLimit -= (size / 1000) | |
136 | ||
137 | logger.debug('Downloaded HLS playlist file %s with %d kB remained limit.', fileUrl, Math.floor(remainingBodyKBLimit)) | |
138 | } | |
139 | ||
140 | clearTimeout(timer) | |
141 | ||
142 | await move(tmpDirectory, destinationDir, { overwrite: true }) | |
143 | ||
144 | return res() | |
145 | } catch (err) { | |
146 | deleteTmpDirectory(tmpDirectory) | |
147 | ||
148 | return rej(err) | |
149 | } | |
150 | }) | |
151 | ||
152 | function deleteTmpDirectory (directory: string) { | |
153 | remove(directory) | |
154 | .catch(err => logger.error('Cannot delete path on HLS download error.', { err })) | |
155 | } | |
156 | ||
157 | async function fetchUniqUrls (playlistUrl: string) { | |
158 | const { body } = await doRequest(playlistUrl) | |
159 | ||
160 | if (!body) return [] | |
161 | ||
162 | const urls = body.split('\n') | |
163 | .filter(line => line.endsWith('.m3u8') || line.endsWith('.mp4')) | |
164 | .map(url => { | |
165 | if (url.startsWith('http://') || url.startsWith('https://')) return url | |
166 | ||
167 | return `${dirname(playlistUrl)}/${url}` | |
168 | }) | |
169 | ||
170 | return uniq(urls) | |
171 | } | |
172 | } | |
173 | ||
174 | // --------------------------------------------------------------------------- | |
175 | ||
176 | export { | |
177 | updateMasterHLSPlaylist, | |
178 | updateSha256VODSegments, | |
179 | buildSha256Segment, | |
180 | downloadPlaylistSegments, | |
181 | updateStreamingPlaylistsInfohashesIfNeeded | |
182 | } | |
183 | ||
184 | // --------------------------------------------------------------------------- | |
185 | ||
186 | function getRangesFromPlaylist (playlistContent: string) { | |
187 | const ranges: { offset: number, length: number }[] = [] | |
188 | const lines = playlistContent.split('\n') | |
189 | const regex = /^#EXT-X-BYTERANGE:(\d+)@(\d+)$/ | |
190 | ||
191 | for (const line of lines) { | |
192 | const captured = regex.exec(line) | |
193 | ||
194 | if (captured) { | |
195 | ranges.push({ length: parseInt(captured[1], 10), offset: parseInt(captured[2], 10) }) | |
196 | } | |
197 | } | |
198 | ||
199 | return ranges | |
200 | } |