server/initializers/constants.ts

   1 import { CronRepeatOptions, EveryRepeatOptions } from 'bull'
   2 import { randomBytes } from 'crypto'
   3 import { invert } from 'lodash'
   4 import { join } from 'path'
   5 import { randomInt, root } from '@shared/core-utils'
   6 import {
   7   AbuseState,
   8   JobType,
   9   VideoImportState,
  10   VideoPrivacy,
  11   VideoRateType,
  12   VideoResolution,
  13   VideoState,
  14   VideoTranscodingFPS
  15 } from '../../shared/models'
  16 import { ActivityPubActorType } from '../../shared/models/activitypub'
  17 import { FollowState } from '../../shared/models/actors'
  18 import { NSFWPolicyType } from '../../shared/models/videos/nsfw-policy.type'
  19 import { VideoPlaylistPrivacy } from '../../shared/models/videos/playlist/video-playlist-privacy.model'
  20 import { VideoPlaylistType } from '../../shared/models/videos/playlist/video-playlist-type.model'
  21 // Do not use barrels, remain constants as independent as possible
  22 import { isTestInstance, sanitizeHost, sanitizeUrl } from '../helpers/core-utils'
  23 import { CONFIG, registerConfigChangedHandler } from './config'
  24
  25 // ---------------------------------------------------------------------------
  26
  27 const LAST_MIGRATION_VERSION = 675
  28
  29 // ---------------------------------------------------------------------------
  30
  31 const API_VERSION = 'v1'
  32 const PEERTUBE_VERSION: string = require(join(root(), 'package.json')).version
  33
  34 const PAGINATION = {
  35   GLOBAL: {
  36     COUNT: {
  37       DEFAULT: 15,
  38       MAX: 100
  39     }
  40   },
  41   OUTBOX: {
  42     COUNT: {
  43       MAX: 50
  44     }
  45   }
  46 }
  47
  48 const WEBSERVER = {
  49   URL: '',
  50   HOST: '',
  51   SCHEME: '',
  52   WS: '',
  53   HOSTNAME: '',
  54   PORT: 0,
  55   RTMP_URL: '',
  56   RTMPS_URL: ''
  57 }
  58
  59 // Sortable columns per schema
  60 const SORTABLE_COLUMNS = {
  61   USERS: [ 'id', 'username', 'videoQuotaUsed', 'createdAt', 'lastLoginDate', 'role' ],
  62   USER_SUBSCRIPTIONS: [ 'id', 'createdAt' ],
  63   ACCOUNTS: [ 'createdAt' ],
  64   JOBS: [ 'createdAt' ],
  65   VIDEO_CHANNELS: [ 'id', 'name', 'updatedAt', 'createdAt' ],
  66   VIDEO_IMPORTS: [ 'createdAt' ],
  67
  68   VIDEO_COMMENT_THREADS: [ 'createdAt', 'totalReplies' ],
  69   VIDEO_COMMENTS: [ 'createdAt' ],
  70
  71   VIDEO_RATES: [ 'createdAt' ],
  72   BLACKLISTS: [ 'id', 'name', 'duration', 'views', 'likes', 'dislikes', 'uuid', 'createdAt' ],
  73
  74   INSTANCE_FOLLOWERS: [ 'createdAt', 'state', 'score' ],
  75   INSTANCE_FOLLOWING: [ 'createdAt', 'redundancyAllowed', 'state' ],
  76   ACCOUNT_FOLLOWERS: [ 'createdAt' ],
  77   CHANNEL_FOLLOWERS: [ 'createdAt' ],
  78
  79   VIDEOS: [ 'name', 'duration', 'createdAt', 'publishedAt', 'originallyPublishedAt', 'views', 'likes', 'trending', 'hot', 'best' ],
  80
  81   // Don't forget to update peertube-search-index with the same values
  82   VIDEOS_SEARCH: [ 'name', 'duration', 'createdAt', 'publishedAt', 'originallyPublishedAt', 'views', 'likes', 'match' ],
  83   VIDEO_CHANNELS_SEARCH: [ 'match', 'displayName', 'createdAt' ],
  84   VIDEO_PLAYLISTS_SEARCH: [ 'match', 'displayName', 'createdAt' ],
  85
  86   ABUSES: [ 'id', 'createdAt', 'state' ],
  87
  88   ACCOUNTS_BLOCKLIST: [ 'createdAt' ],
  89   SERVERS_BLOCKLIST: [ 'createdAt' ],
  90
  91   USER_NOTIFICATIONS: [ 'createdAt', 'read' ],
  92
  93   VIDEO_PLAYLISTS: [ 'name', 'displayName', 'createdAt', 'updatedAt' ],
  94
  95   PLUGINS: [ 'name', 'createdAt', 'updatedAt' ],
  96
  97   AVAILABLE_PLUGINS: [ 'npmName', 'popularity' ],
  98
  99   VIDEO_REDUNDANCIES: [ 'name' ]
 100 }
 101
 102 const OAUTH_LIFETIME = {
 103   ACCESS_TOKEN: 3600 * 24, // 1 day, for upload
 104   REFRESH_TOKEN: 1209600 // 2 weeks
 105 }
 106
 107 const ROUTE_CACHE_LIFETIME = {
 108   FEEDS: '15 minutes',
 109   ROBOTS: '2 hours',
 110   SITEMAP: '1 day',
 111   SECURITYTXT: '2 hours',
 112   NODEINFO: '10 minutes',
 113   DNT_POLICY: '1 week',
 114   ACTIVITY_PUB: {
 115     VIDEOS: '1 second' // 1 second, cache concurrent requests after a broadcast for example
 116   },
 117   STATS: '4 hours'
 118 }
 119
 120 // ---------------------------------------------------------------------------
 121
 122 // Number of points we add/remove after a successful/bad request
 123 const ACTOR_FOLLOW_SCORE = {
 124   PENALTY: -10,
 125   BONUS: 10,
 126   BASE: 1000,
 127   MAX: 10000
 128 }
 129
 130 const FOLLOW_STATES: { [ id: string ]: FollowState } = {
 131   PENDING: 'pending',
 132   ACCEPTED: 'accepted'
 133 }
 134
 135 const REMOTE_SCHEME = {
 136   HTTP: 'https',
 137   WS: 'wss'
 138 }
 139
 140 const JOB_ATTEMPTS: { [id in JobType]: number } = {
 141   'activitypub-http-broadcast': 1,
 142   'activitypub-http-unicast': 1,
 143   'activitypub-http-fetcher': 2,
 144   'activitypub-follow': 5,
 145   'activitypub-cleaner': 1,
 146   'video-file-import': 1,
 147   'video-transcoding': 1,
 148   'video-import': 1,
 149   'email': 5,
 150   'actor-keys': 3,
 151   'videos-views-stats': 1,
 152   'activitypub-refresher': 1,
 153   'video-redundancy': 1,
 154   'video-live-ending': 1,
 155   'move-to-object-storage': 3
 156 }
 157 // Excluded keys are jobs that can be configured by admins
 158 const JOB_CONCURRENCY: { [id in Exclude<JobType, 'video-transcoding' | 'video-import'>]: number } = {
 159   'activitypub-http-broadcast': 1,
 160   'activitypub-http-unicast': 10,
 161   'activitypub-http-fetcher': 3,
 162   'activitypub-cleaner': 1,
 163   'activitypub-follow': 1,
 164   'video-file-import': 1,
 165   'email': 5,
 166   'actor-keys': 1,
 167   'videos-views-stats': 1,
 168   'activitypub-refresher': 1,
 169   'video-redundancy': 1,
 170   'video-live-ending': 10,
 171   'move-to-object-storage': 1
 172 }
 173 const JOB_TTL: { [id in JobType]: number } = {
 174   'activitypub-http-broadcast': 60000 * 10, // 10 minutes
 175   'activitypub-http-unicast': 60000 * 10, // 10 minutes
 176   'activitypub-http-fetcher': 1000 * 3600 * 10, // 10 hours
 177   'activitypub-follow': 60000 * 10, // 10 minutes
 178   'activitypub-cleaner': 1000 * 3600, // 1 hour
 179   'video-file-import': 1000 * 3600, // 1 hour
 180   'video-transcoding': 1000 * 3600 * 48, // 2 days, transcoding could be long
 181   'video-import': 1000 * 3600 * 2, // 2 hours
 182   'email': 60000 * 10, // 10 minutes
 183   'actor-keys': 60000 * 20, // 20 minutes
 184   'videos-views-stats': undefined, // Unlimited
 185   'activitypub-refresher': 60000 * 10, // 10 minutes
 186   'video-redundancy': 1000 * 3600 * 3, // 3 hours
 187   'video-live-ending': 1000 * 60 * 10, // 10 minutes
 188   'move-to-object-storage': 1000 * 60 * 60 * 3 // 3 hours
 189 }
 190 const REPEAT_JOBS: { [ id in JobType ]?: EveryRepeatOptions | CronRepeatOptions } = {
 191   'videos-views-stats': {
 192     cron: randomInt(1, 20) + ' * * * *' // Between 1-20 minutes past the hour
 193   },
 194   'activitypub-cleaner': {
 195     cron: '30 5 * * ' + randomInt(0, 7) // 1 time per week (random day) at 5:30 AM
 196   }
 197 }
 198 const JOB_PRIORITY = {
 199   TRANSCODING: 100
 200 }
 201
 202 const BROADCAST_CONCURRENCY = 30 // How many requests in parallel we do in activitypub-http-broadcast job
 203 const AP_CLEANER_CONCURRENCY = 10 // How many requests in parallel we do in activitypub-cleaner job
 204 const CRAWL_REQUEST_CONCURRENCY = 1 // How many requests in parallel to fetch remote data (likes, shares...)
 205 const REQUEST_TIMEOUTS = {
 206   DEFAULT: 7000, // 7 seconds
 207   FILE: 30000, // 30 seconds
 208   REDUNDANCY: JOB_TTL['video-redundancy']
 209 }
 210
 211 const JOB_COMPLETED_LIFETIME = 60000 * 60 * 24 * 2 // 2 days
 212 const VIDEO_IMPORT_TIMEOUT = 1000 * 3600 // 1 hour
 213
 214 const SCHEDULER_INTERVALS_MS = {
 215   ACTOR_FOLLOW_SCORES: 60000 * 60, // 1 hour
 216   REMOVE_OLD_JOBS: 60000 * 60, // 1 hour
 217   UPDATE_VIDEOS: 60000, // 1 minute
 218   YOUTUBE_DL_UPDATE: 60000 * 60 * 24, // 1 day
 219   VIDEO_VIEWS_BUFFER_UPDATE: CONFIG.VIEWS.VIDEOS.LOCAL_BUFFER_UPDATE_INTERVAL,
 220   CHECK_PLUGINS: CONFIG.PLUGINS.INDEX.CHECK_LATEST_VERSIONS_INTERVAL,
 221   CHECK_PEERTUBE_VERSION: 60000 * 60 * 24, // 1 day
 222   AUTO_FOLLOW_INDEX_INSTANCES: 60000 * 60 * 24, // 1 day
 223   REMOVE_OLD_VIEWS: 60000 * 60 * 24, // 1 day
 224   REMOVE_OLD_HISTORY: 60000 * 60 * 24, // 1 day
 225   UPDATE_INBOX_STATS: 1000 * 60, // 1 minute
 226   REMOVE_DANGLING_RESUMABLE_UPLOADS: 60000 * 60 // 1 hour
 227 }
 228
 229 // ---------------------------------------------------------------------------
 230
 231 const CONSTRAINTS_FIELDS = {
 232   USERS: {
 233     NAME: { min: 1, max: 120 }, // Length
 234     DESCRIPTION: { min: 3, max: 1000 }, // Length
 235     USERNAME: { min: 1, max: 50 }, // Length
 236     PASSWORD: { min: 6, max: 255 }, // Length
 237     VIDEO_QUOTA: { min: -1 },
 238     VIDEO_QUOTA_DAILY: { min: -1 },
 239     VIDEO_LANGUAGES: { max: 500 }, // Array length
 240     BLOCKED_REASON: { min: 3, max: 250 } // Length
 241   },
 242   ABUSES: {
 243     REASON: { min: 2, max: 3000 }, // Length
 244     MODERATION_COMMENT: { min: 2, max: 3000 } // Length
 245   },
 246   ABUSE_MESSAGES: {
 247     MESSAGE: { min: 2, max: 3000 } // Length
 248   },
 249   VIDEO_BLACKLIST: {
 250     REASON: { min: 2, max: 300 } // Length
 251   },
 252   VIDEO_CHANNELS: {
 253     NAME: { min: 1, max: 120 }, // Length
 254     DESCRIPTION: { min: 3, max: 1000 }, // Length
 255     SUPPORT: { min: 3, max: 1000 }, // Length
 256     URL: { min: 3, max: 2000 } // Length
 257   },
 258   VIDEO_CAPTIONS: {
 259     CAPTION_FILE: {
 260       EXTNAME: [ '.vtt', '.srt' ],
 261       FILE_SIZE: {
 262         max: 4 * 1024 * 1024 // 4MB
 263       }
 264     }
 265   },
 266   VIDEO_IMPORTS: {
 267     URL: { min: 3, max: 2000 }, // Length
 268     TORRENT_NAME: { min: 3, max: 255 }, // Length
 269     TORRENT_FILE: {
 270       EXTNAME: [ '.torrent' ],
 271       FILE_SIZE: {
 272         max: 1024 * 200 // 200 KB
 273       }
 274     }
 275   },
 276   VIDEOS_REDUNDANCY: {
 277     URL: { min: 3, max: 2000 } // Length
 278   },
 279   VIDEO_RATES: {
 280     URL: { min: 3, max: 2000 } // Length
 281   },
 282   VIDEOS: {
 283     NAME: { min: 3, max: 120 }, // Length
 284     LANGUAGE: { min: 1, max: 10 }, // Length
 285     TRUNCATED_DESCRIPTION: { min: 3, max: 250 }, // Length
 286     DESCRIPTION: { min: 3, max: 10000 }, // Length
 287     SUPPORT: { min: 3, max: 1000 }, // Length
 288     IMAGE: {
 289       EXTNAME: [ '.png', '.jpg', '.jpeg', '.webp' ],
 290       FILE_SIZE: {
 291         max: 4 * 1024 * 1024 // 4MB
 292       }
 293     },
 294     EXTNAME: [] as string[],
 295     INFO_HASH: { min: 40, max: 40 }, // Length, info hash is 20 bytes length but we represent it in hexadecimal so 20 * 2
 296     DURATION: { min: 0 }, // Number
 297     TAGS: { min: 0, max: 5 }, // Number of total tags
 298     TAG: { min: 2, max: 30 }, // Length
 299     VIEWS: { min: 0 },
 300     LIKES: { min: 0 },
 301     DISLIKES: { min: 0 },
 302     FILE_SIZE: { min: -1 },
 303     PARTIAL_UPLOAD_SIZE: { max: 50 * 1024 * 1024 * 1024 }, // 50GB
 304     URL: { min: 3, max: 2000 } // Length
 305   },
 306   VIDEO_PLAYLISTS: {
 307     NAME: { min: 1, max: 120 }, // Length
 308     DESCRIPTION: { min: 3, max: 1000 }, // Length
 309     URL: { min: 3, max: 2000 }, // Length
 310     IMAGE: {
 311       EXTNAME: [ '.jpg', '.jpeg' ],
 312       FILE_SIZE: {
 313         max: 4 * 1024 * 1024 // 4MB
 314       }
 315     }
 316   },
 317   ACTORS: {
 318     PUBLIC_KEY: { min: 10, max: 5000 }, // Length
 319     PRIVATE_KEY: { min: 10, max: 5000 }, // Length
 320     URL: { min: 3, max: 2000 }, // Length
 321     IMAGE: {
 322       EXTNAME: [ '.png', '.jpeg', '.jpg', '.gif', '.webp' ],
 323       FILE_SIZE: {
 324         max: 4 * 1024 * 1024 // 4MB
 325       }
 326     }
 327   },
 328   VIDEO_EVENTS: {
 329     COUNT: { min: 0 }
 330   },
 331   VIDEO_COMMENTS: {
 332     TEXT: { min: 1, max: 10000 }, // Length
 333     URL: { min: 3, max: 2000 } // Length
 334   },
 335   VIDEO_SHARE: {
 336     URL: { min: 3, max: 2000 } // Length
 337   },
 338   CONTACT_FORM: {
 339     FROM_NAME: { min: 1, max: 120 }, // Length
 340     BODY: { min: 3, max: 5000 } // Length
 341   },
 342   PLUGINS: {
 343     NAME: { min: 1, max: 214 }, // Length
 344     DESCRIPTION: { min: 1, max: 20000 } // Length
 345   },
 346   COMMONS: {
 347     URL: { min: 5, max: 2000 } // Length
 348   }
 349 }
 350
 351 const VIEW_LIFETIME = {
 352   VIEW: CONFIG.VIEWS.VIDEOS.IP_VIEW_EXPIRATION,
 353   VIEWER: 60000 * 5 // 5 minutes
 354 }
 355
 356 let CONTACT_FORM_LIFETIME = 60000 * 60 // 1 hour
 357
 358 const VIDEO_TRANSCODING_FPS: VideoTranscodingFPS = {
 359   MIN: 1,
 360   STANDARD: [ 24, 25, 30 ],
 361   HD_STANDARD: [ 50, 60 ],
 362   AVERAGE: 30,
 363   MAX: 60,
 364   KEEP_ORIGIN_FPS_RESOLUTION_MIN: 720 // We keep the original FPS on high resolutions (720 minimum)
 365 }
 366
 367 const DEFAULT_AUDIO_RESOLUTION = VideoResolution.H_480P
 368
 369 const VIDEO_RATE_TYPES: { [ id: string ]: VideoRateType } = {
 370   LIKE: 'like',
 371   DISLIKE: 'dislike'
 372 }
 373
 374 const FFMPEG_NICE: { [ id: string ]: number } = {
 375   // parent process defaults to niceness = 0
 376   // reminder: lower = higher priority, max value is 19, lowest is -20
 377   LIVE: 5, // prioritize over VOD and THUMBNAIL
 378   THUMBNAIL: 10,
 379   VOD: 15
 380 }
 381
 382 const VIDEO_CATEGORIES = {
 383   1: 'Music',
 384   2: 'Films',
 385   3: 'Vehicles',
 386   4: 'Art',
 387   5: 'Sports',
 388   6: 'Travels',
 389   7: 'Gaming',
 390   8: 'People',
 391   9: 'Comedy',
 392   10: 'Entertainment',
 393   11: 'News & Politics',
 394   12: 'How To',
 395   13: 'Education',
 396   14: 'Activism',
 397   15: 'Science & Technology',
 398   16: 'Animals',
 399   17: 'Kids',
 400   18: 'Food'
 401 }
 402
 403 // See https://creativecommons.org/licenses/?lang=en
 404 const VIDEO_LICENCES = {
 405   1: 'Attribution',
 406   2: 'Attribution - Share Alike',
 407   3: 'Attribution - No Derivatives',
 408   4: 'Attribution - Non Commercial',
 409   5: 'Attribution - Non Commercial - Share Alike',
 410   6: 'Attribution - Non Commercial - No Derivatives',
 411   7: 'Public Domain Dedication'
 412 }
 413
 414 const VIDEO_LANGUAGES: { [id: string]: string } = {}
 415
 416 const VIDEO_PRIVACIES: { [ id in VideoPrivacy ]: string } = {
 417   [VideoPrivacy.PUBLIC]: 'Public',
 418   [VideoPrivacy.UNLISTED]: 'Unlisted',
 419   [VideoPrivacy.PRIVATE]: 'Private',
 420   [VideoPrivacy.INTERNAL]: 'Internal'
 421 }
 422
 423 const VIDEO_STATES: { [ id in VideoState ]: string } = {
 424   [VideoState.PUBLISHED]: 'Published',
 425   [VideoState.TO_TRANSCODE]: 'To transcode',
 426   [VideoState.TO_IMPORT]: 'To import',
 427   [VideoState.WAITING_FOR_LIVE]: 'Waiting for livestream',
 428   [VideoState.LIVE_ENDED]: 'Livestream ended',
 429   [VideoState.TO_MOVE_TO_EXTERNAL_STORAGE]: 'To move to an external storage',
 430   [VideoState.TRANSCODING_FAILED]: 'Transcoding failed',
 431   [VideoState.TO_MOVE_TO_EXTERNAL_STORAGE_FAILED]: 'External storage move failed'
 432 }
 433
 434 const VIDEO_IMPORT_STATES: { [ id in VideoImportState ]: string } = {
 435   [VideoImportState.FAILED]: 'Failed',
 436   [VideoImportState.PENDING]: 'Pending',
 437   [VideoImportState.SUCCESS]: 'Success',
 438   [VideoImportState.REJECTED]: 'Rejected'
 439 }
 440
 441 const ABUSE_STATES: { [ id in AbuseState ]: string } = {
 442   [AbuseState.PENDING]: 'Pending',
 443   [AbuseState.REJECTED]: 'Rejected',
 444   [AbuseState.ACCEPTED]: 'Accepted'
 445 }
 446
 447 const VIDEO_PLAYLIST_PRIVACIES: { [ id in VideoPlaylistPrivacy ]: string } = {
 448   [VideoPlaylistPrivacy.PUBLIC]: 'Public',
 449   [VideoPlaylistPrivacy.UNLISTED]: 'Unlisted',
 450   [VideoPlaylistPrivacy.PRIVATE]: 'Private'
 451 }
 452
 453 const VIDEO_PLAYLIST_TYPES: { [ id in VideoPlaylistType ]: string } = {
 454   [VideoPlaylistType.REGULAR]: 'Regular',
 455   [VideoPlaylistType.WATCH_LATER]: 'Watch later'
 456 }
 457
 458 const MIMETYPES = {
 459   AUDIO: {
 460     MIMETYPE_EXT: {
 461       'audio/mpeg': '.mp3',
 462       'audio/mp3': '.mp3',
 463       'application/ogg': '.ogg',
 464       'audio/ogg': '.ogg',
 465       'audio/x-ms-wma': '.wma',
 466       'audio/wav': '.wav',
 467       'audio/x-wav': '.wav',
 468       'audio/x-flac': '.flac',
 469       'audio/flac': '.flac',
 470       'audio/aac': '.aac',
 471       'audio/m4a': '.m4a',
 472       'audio/mp4': '.m4a',
 473       'audio/x-m4a': '.m4a',
 474       'audio/ac3': '.ac3'
 475     },
 476     EXT_MIMETYPE: null as { [ id: string ]: string }
 477   },
 478   VIDEO: {
 479     MIMETYPE_EXT: null as { [ id: string ]: string | string[] },
 480     MIMETYPES_REGEX: null as string,
 481     EXT_MIMETYPE: null as { [ id: string ]: string }
 482   },
 483   IMAGE: {
 484     MIMETYPE_EXT: {
 485       'image/png': '.png',
 486       'image/gif': '.gif',
 487       'image/webp': '.webp',
 488       'image/jpg': '.jpg',
 489       'image/jpeg': '.jpg'
 490     },
 491     EXT_MIMETYPE: null as { [ id: string ]: string }
 492   },
 493   VIDEO_CAPTIONS: {
 494     MIMETYPE_EXT: {
 495       'text/vtt': '.vtt',
 496       'application/x-subrip': '.srt',
 497       'text/plain': '.srt'
 498     }
 499   },
 500   TORRENT: {
 501     MIMETYPE_EXT: {
 502       'application/x-bittorrent': '.torrent'
 503     }
 504   }
 505 }
 506 MIMETYPES.AUDIO.EXT_MIMETYPE = invert(MIMETYPES.AUDIO.MIMETYPE_EXT)
 507 MIMETYPES.IMAGE.EXT_MIMETYPE = invert(MIMETYPES.IMAGE.MIMETYPE_EXT)
 508
 509 const BINARY_CONTENT_TYPES = new Set([
 510   'binary/octet-stream',
 511   'application/octet-stream',
 512   'application/x-binary'
 513 ])
 514
 515 // ---------------------------------------------------------------------------
 516
 517 const OVERVIEWS = {
 518   VIDEOS: {
 519     SAMPLE_THRESHOLD: 6,
 520     SAMPLES_COUNT: 20
 521   }
 522 }
 523
 524 // ---------------------------------------------------------------------------
 525
 526 const SERVER_ACTOR_NAME = 'peertube'
 527
 528 const ACTIVITY_PUB = {
 529   POTENTIAL_ACCEPT_HEADERS: [
 530     'application/activity+json',
 531     'application/ld+json',
 532     'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'
 533   ],
 534   ACCEPT_HEADER: 'application/activity+json, application/ld+json',
 535   PUBLIC: 'https://www.w3.org/ns/activitystreams#Public',
 536   COLLECTION_ITEMS_PER_PAGE: 10,
 537   FETCH_PAGE_LIMIT: 2000,
 538   URL_MIME_TYPES: {
 539     VIDEO: [] as string[],
 540     TORRENT: [ 'application/x-bittorrent' ],
 541     MAGNET: [ 'application/x-bittorrent;x-scheme-handler/magnet' ]
 542   },
 543   MAX_RECURSION_COMMENTS: 100,
 544   ACTOR_REFRESH_INTERVAL: 3600 * 24 * 1000 * 2, // 2 days
 545   VIDEO_REFRESH_INTERVAL: 3600 * 24 * 1000 * 2, // 2 days
 546   VIDEO_PLAYLIST_REFRESH_INTERVAL: 3600 * 24 * 1000 * 2 // 2 days
 547 }
 548
 549 const ACTIVITY_PUB_ACTOR_TYPES: { [ id: string ]: ActivityPubActorType } = {
 550   GROUP: 'Group',
 551   PERSON: 'Person',
 552   APPLICATION: 'Application',
 553   ORGANIZATION: 'Organization',
 554   SERVICE: 'Service'
 555 }
 556
 557 const HTTP_SIGNATURE = {
 558   HEADER_NAME: 'signature',
 559   ALGORITHM: 'rsa-sha256',
 560   HEADERS_TO_SIGN: [ '(request-target)', 'host', 'date', 'digest' ],
 561   REQUIRED_HEADERS: {
 562     ALL: [ '(request-target)', 'host', 'date' ],
 563     POST: [ '(request-target)', 'host', 'date', 'digest' ]
 564   },
 565   CLOCK_SKEW_SECONDS: 1800
 566 }
 567
 568 // ---------------------------------------------------------------------------
 569
 570 let PRIVATE_RSA_KEY_SIZE = 2048
 571
 572 // Password encryption
 573 const BCRYPT_SALT_SIZE = 10
 574
 575 const USER_PASSWORD_RESET_LIFETIME = 60000 * 60 // 60 minutes
 576 const USER_PASSWORD_CREATE_LIFETIME = 60000 * 60 * 24 * 7 // 7 days
 577
 578 const USER_EMAIL_VERIFY_LIFETIME = 60000 * 60 // 60 minutes
 579
 580 const NSFW_POLICY_TYPES: { [ id: string ]: NSFWPolicyType } = {
 581   DO_NOT_LIST: 'do_not_list',
 582   BLUR: 'blur',
 583   DISPLAY: 'display'
 584 }
 585
 586 // ---------------------------------------------------------------------------
 587
 588 // Express static paths (router)
 589 const STATIC_PATHS = {
 590   THUMBNAILS: '/static/thumbnails/',
 591   WEBSEED: '/static/webseed/',
 592   REDUNDANCY: '/static/redundancy/',
 593   STREAMING_PLAYLISTS: {
 594     HLS: '/static/streaming-playlists/hls'
 595   }
 596 }
 597 const STATIC_DOWNLOAD_PATHS = {
 598   TORRENTS: '/download/torrents/',
 599   VIDEOS: '/download/videos/',
 600   HLS_VIDEOS: '/download/streaming-playlists/hls/videos/'
 601 }
 602 const LAZY_STATIC_PATHS = {
 603   BANNERS: '/lazy-static/banners/',
 604   AVATARS: '/lazy-static/avatars/',
 605   PREVIEWS: '/lazy-static/previews/',
 606   VIDEO_CAPTIONS: '/lazy-static/video-captions/',
 607   TORRENTS: '/lazy-static/torrents/'
 608 }
 609
 610 // Cache control
 611 const STATIC_MAX_AGE = {
 612   SERVER: '2h',
 613   LAZY_SERVER: '2d',
 614   CLIENT: '30d'
 615 }
 616
 617 // Videos thumbnail size
 618 const THUMBNAILS_SIZE = {
 619   width: 280,
 620   height: 157,
 621   minWidth: 150
 622 }
 623 const PREVIEWS_SIZE = {
 624   width: 850,
 625   height: 480,
 626   minWidth: 400
 627 }
 628 const ACTOR_IMAGES_SIZE = {
 629   AVATARS: {
 630     width: 120,
 631     height: 120
 632   },
 633   BANNERS: {
 634     width: 1920,
 635     height: 317 // 6/1 ratio
 636   }
 637 }
 638
 639 const EMBED_SIZE = {
 640   width: 560,
 641   height: 315
 642 }
 643
 644 // Sub folders of cache directory
 645 const FILES_CACHE = {
 646   PREVIEWS: {
 647     DIRECTORY: join(CONFIG.STORAGE.CACHE_DIR, 'previews'),
 648     MAX_AGE: 1000 * 3600 * 3 // 3 hours
 649   },
 650   VIDEO_CAPTIONS: {
 651     DIRECTORY: join(CONFIG.STORAGE.CACHE_DIR, 'video-captions'),
 652     MAX_AGE: 1000 * 3600 * 3 // 3 hours
 653   },
 654   TORRENTS: {
 655     DIRECTORY: join(CONFIG.STORAGE.CACHE_DIR, 'torrents'),
 656     MAX_AGE: 1000 * 3600 * 3 // 3 hours
 657   }
 658 }
 659
 660 const LRU_CACHE = {
 661   USER_TOKENS: {
 662     MAX_SIZE: 1000
 663   },
 664   ACTOR_IMAGE_STATIC: {
 665     MAX_SIZE: 500
 666   }
 667 }
 668
 669 const RESUMABLE_UPLOAD_DIRECTORY = join(CONFIG.STORAGE.TMP_DIR, 'resumable-uploads')
 670 const HLS_STREAMING_PLAYLIST_DIRECTORY = join(CONFIG.STORAGE.STREAMING_PLAYLISTS_DIR, 'hls')
 671 const HLS_REDUNDANCY_DIRECTORY = join(CONFIG.STORAGE.REDUNDANCY_DIR, 'hls')
 672
 673 const RESUMABLE_UPLOAD_SESSION_LIFETIME = SCHEDULER_INTERVALS_MS.REMOVE_DANGLING_RESUMABLE_UPLOADS
 674
 675 const VIDEO_LIVE = {
 676   EXTENSION: '.ts',
 677   CLEANUP_DELAY: 1000 * 60 * 5, // 5 minutes
 678   SEGMENT_TIME_SECONDS: 4, // 4 seconds
 679   SEGMENTS_LIST_SIZE: 15, // 15 maximum segments in live playlist
 680   REPLAY_DIRECTORY: 'replay',
 681   EDGE_LIVE_DELAY_SEGMENTS_NOTIFICATION: 4,
 682   MAX_SOCKET_WAITING_DATA: 1024 * 1000 * 100, // 100MB
 683   RTMP: {
 684     CHUNK_SIZE: 60000,
 685     GOP_CACHE: true,
 686     PING: 60,
 687     PING_TIMEOUT: 30,
 688     BASE_PATH: 'live'
 689   }
 690 }
 691
 692 const MEMOIZE_TTL = {
 693   OVERVIEWS_SAMPLE: 1000 * 3600 * 4, // 4 hours
 694   INFO_HASH_EXISTS: 1000 * 3600 * 12, // 12 hours
 695   LIVE_ABLE_TO_UPLOAD: 1000 * 60, // 1 minute
 696   LIVE_CHECK_SOCKET_HEALTH: 1000 * 60 // 1 minute
 697 }
 698
 699 const MEMOIZE_LENGTH = {
 700   INFO_HASH_EXISTS: 200
 701 }
 702
 703 const QUEUE_CONCURRENCY = {
 704   ACTOR_PROCESS_IMAGE: 3
 705 }
 706
 707 const REDUNDANCY = {
 708   VIDEOS: {
 709     RANDOMIZED_FACTOR: 5
 710   }
 711 }
 712
 713 const ACCEPT_HEADERS = [ 'html', 'application/json' ].concat(ACTIVITY_PUB.POTENTIAL_ACCEPT_HEADERS)
 714
 715 const ASSETS_PATH = {
 716   DEFAULT_AUDIO_BACKGROUND: join(root(), 'dist', 'server', 'assets', 'default-audio-background.jpg'),
 717   DEFAULT_LIVE_BACKGROUND: join(root(), 'dist', 'server', 'assets', 'default-live-background.jpg')
 718 }
 719
 720 // ---------------------------------------------------------------------------
 721
 722 const CUSTOM_HTML_TAG_COMMENTS = {
 723   TITLE: '<!-- title tag -->',
 724   DESCRIPTION: '<!-- description tag -->',
 725   CUSTOM_CSS: '<!-- custom css tag -->',
 726   META_TAGS: '<!-- meta tags -->',
 727   SERVER_CONFIG: '<!-- server config -->'
 728 }
 729
 730 // ---------------------------------------------------------------------------
 731
 732 const FEEDS = {
 733   COUNT: 20
 734 }
 735
 736 const MAX_LOGS_OUTPUT_CHARACTERS = 10 * 1000 * 1000
 737 const LOG_FILENAME = 'peertube.log'
 738 const AUDIT_LOG_FILENAME = 'peertube-audit.log'
 739
 740 // ---------------------------------------------------------------------------
 741
 742 const TRACKER_RATE_LIMITS = {
 743   INTERVAL: 60000 * 5, // 5 minutes
 744   ANNOUNCES_PER_IP_PER_INFOHASH: 15, // maximum announces per torrent in the interval
 745   ANNOUNCES_PER_IP: 30, // maximum announces for all our torrents in the interval
 746   BLOCK_IP_LIFETIME: 60000 * 3 // 3 minutes
 747 }
 748
 749 const P2P_MEDIA_LOADER_PEER_VERSION = 2
 750
 751 // ---------------------------------------------------------------------------
 752
 753 const PLUGIN_GLOBAL_CSS_FILE_NAME = 'plugins-global.css'
 754 const PLUGIN_GLOBAL_CSS_PATH = join(CONFIG.STORAGE.TMP_DIR, PLUGIN_GLOBAL_CSS_FILE_NAME)
 755
 756 let PLUGIN_EXTERNAL_AUTH_TOKEN_LIFETIME = 1000 * 60 * 5 // 5 minutes
 757
 758 const DEFAULT_THEME_NAME = 'default'
 759 const DEFAULT_USER_THEME_NAME = 'instance-default'
 760
 761 // ---------------------------------------------------------------------------
 762
 763 const SEARCH_INDEX = {
 764   ROUTES: {
 765     VIDEOS: '/api/v1/search/videos',
 766     VIDEO_CHANNELS: '/api/v1/search/video-channels'
 767   }
 768 }
 769
 770 // ---------------------------------------------------------------------------
 771
 772 // Special constants for a test instance
 773 if (isTestInstance() === true) {
 774   PRIVATE_RSA_KEY_SIZE = 1024
 775
 776   ACTOR_FOLLOW_SCORE.BASE = 20
 777
 778   REMOTE_SCHEME.HTTP = 'http'
 779   REMOTE_SCHEME.WS = 'ws'
 780
 781   STATIC_MAX_AGE.SERVER = '0'
 782
 783   ACTIVITY_PUB.COLLECTION_ITEMS_PER_PAGE = 2
 784   ACTIVITY_PUB.ACTOR_REFRESH_INTERVAL = 10 * 1000 // 10 seconds
 785   ACTIVITY_PUB.VIDEO_REFRESH_INTERVAL = 10 * 1000 // 10 seconds
 786   ACTIVITY_PUB.VIDEO_PLAYLIST_REFRESH_INTERVAL = 10 * 1000 // 10 seconds
 787
 788   CONSTRAINTS_FIELDS.ACTORS.IMAGE.FILE_SIZE.max = 100 * 1024 // 100KB
 789   CONSTRAINTS_FIELDS.VIDEOS.IMAGE.FILE_SIZE.max = 400 * 1024 // 400KB
 790
 791   SCHEDULER_INTERVALS_MS.ACTOR_FOLLOW_SCORES = 1000
 792   SCHEDULER_INTERVALS_MS.REMOVE_OLD_JOBS = 10000
 793   SCHEDULER_INTERVALS_MS.REMOVE_OLD_HISTORY = 5000
 794   SCHEDULER_INTERVALS_MS.REMOVE_OLD_VIEWS = 5000
 795   SCHEDULER_INTERVALS_MS.UPDATE_VIDEOS = 5000
 796   SCHEDULER_INTERVALS_MS.AUTO_FOLLOW_INDEX_INSTANCES = 5000
 797   SCHEDULER_INTERVALS_MS.UPDATE_INBOX_STATS = 5000
 798   SCHEDULER_INTERVALS_MS.CHECK_PEERTUBE_VERSION = 2000
 799   REPEAT_JOBS['videos-views-stats'] = { every: 5000 }
 800   REPEAT_JOBS['activitypub-cleaner'] = { every: 5000 }
 801
 802   REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR = 1
 803
 804   VIEW_LIFETIME.VIEWER = 1000 * 5 // 5 second
 805   CONTACT_FORM_LIFETIME = 1000 // 1 second
 806
 807   JOB_ATTEMPTS['email'] = 1
 808
 809   FILES_CACHE.VIDEO_CAPTIONS.MAX_AGE = 3000
 810   MEMOIZE_TTL.OVERVIEWS_SAMPLE = 3000
 811   MEMOIZE_TTL.LIVE_ABLE_TO_UPLOAD = 3000
 812   OVERVIEWS.VIDEOS.SAMPLE_THRESHOLD = 2
 813
 814   PLUGIN_EXTERNAL_AUTH_TOKEN_LIFETIME = 5000
 815
 816   VIDEO_LIVE.CLEANUP_DELAY = 5000
 817   VIDEO_LIVE.SEGMENT_TIME_SECONDS = 2
 818   VIDEO_LIVE.EDGE_LIVE_DELAY_SEGMENTS_NOTIFICATION = 1
 819 }
 820
 821 updateWebserverUrls()
 822 updateWebserverConfig()
 823
 824 registerConfigChangedHandler(() => {
 825   updateWebserverUrls()
 826   updateWebserverConfig()
 827 })
 828
 829 // ---------------------------------------------------------------------------
 830
 831 const FILES_CONTENT_HASH = {
 832   MANIFEST: generateContentHash(),
 833   FAVICON: generateContentHash(),
 834   LOGO: generateContentHash()
 835 }
 836
 837 // ---------------------------------------------------------------------------
 838
 839 export {
 840   WEBSERVER,
 841   API_VERSION,
 842   VIDEO_LIVE,
 843   PEERTUBE_VERSION,
 844   LAZY_STATIC_PATHS,
 845   SEARCH_INDEX,
 846   RESUMABLE_UPLOAD_DIRECTORY,
 847   RESUMABLE_UPLOAD_SESSION_LIFETIME,
 848   HLS_REDUNDANCY_DIRECTORY,
 849   P2P_MEDIA_LOADER_PEER_VERSION,
 850   ACTOR_IMAGES_SIZE,
 851   ACCEPT_HEADERS,
 852   BCRYPT_SALT_SIZE,
 853   TRACKER_RATE_LIMITS,
 854   FILES_CACHE,
 855   LOG_FILENAME,
 856   CONSTRAINTS_FIELDS,
 857   EMBED_SIZE,
 858   REDUNDANCY,
 859   JOB_CONCURRENCY,
 860   JOB_ATTEMPTS,
 861   AP_CLEANER_CONCURRENCY,
 862   LAST_MIGRATION_VERSION,
 863   OAUTH_LIFETIME,
 864   CUSTOM_HTML_TAG_COMMENTS,
 865   BROADCAST_CONCURRENCY,
 866   AUDIT_LOG_FILENAME,
 867   PAGINATION,
 868   ACTOR_FOLLOW_SCORE,
 869   PREVIEWS_SIZE,
 870   REMOTE_SCHEME,
 871   FOLLOW_STATES,
 872   DEFAULT_USER_THEME_NAME,
 873   SERVER_ACTOR_NAME,
 874   PLUGIN_GLOBAL_CSS_FILE_NAME,
 875   PLUGIN_GLOBAL_CSS_PATH,
 876   PRIVATE_RSA_KEY_SIZE,
 877   ROUTE_CACHE_LIFETIME,
 878   SORTABLE_COLUMNS,
 879   HLS_STREAMING_PLAYLIST_DIRECTORY,
 880   FEEDS,
 881   JOB_TTL,
 882   DEFAULT_THEME_NAME,
 883   NSFW_POLICY_TYPES,
 884   STATIC_MAX_AGE,
 885   STATIC_PATHS,
 886   VIDEO_IMPORT_TIMEOUT,
 887   VIDEO_PLAYLIST_TYPES,
 888   MAX_LOGS_OUTPUT_CHARACTERS,
 889   ACTIVITY_PUB,
 890   ACTIVITY_PUB_ACTOR_TYPES,
 891   THUMBNAILS_SIZE,
 892   VIDEO_CATEGORIES,
 893   MEMOIZE_LENGTH,
 894   VIDEO_LANGUAGES,
 895   VIDEO_PRIVACIES,
 896   VIDEO_LICENCES,
 897   VIDEO_STATES,
 898   QUEUE_CONCURRENCY,
 899   VIDEO_RATE_TYPES,
 900   JOB_PRIORITY,
 901   VIDEO_TRANSCODING_FPS,
 902   FFMPEG_NICE,
 903   ABUSE_STATES,
 904   LRU_CACHE,
 905   REQUEST_TIMEOUTS,
 906   USER_PASSWORD_RESET_LIFETIME,
 907   USER_PASSWORD_CREATE_LIFETIME,
 908   MEMOIZE_TTL,
 909   USER_EMAIL_VERIFY_LIFETIME,
 910   OVERVIEWS,
 911   SCHEDULER_INTERVALS_MS,
 912   REPEAT_JOBS,
 913   STATIC_DOWNLOAD_PATHS,
 914   MIMETYPES,
 915   CRAWL_REQUEST_CONCURRENCY,
 916   DEFAULT_AUDIO_RESOLUTION,
 917   BINARY_CONTENT_TYPES,
 918   JOB_COMPLETED_LIFETIME,
 919   HTTP_SIGNATURE,
 920   VIDEO_IMPORT_STATES,
 921   VIEW_LIFETIME,
 922   CONTACT_FORM_LIFETIME,
 923   VIDEO_PLAYLIST_PRIVACIES,
 924   PLUGIN_EXTERNAL_AUTH_TOKEN_LIFETIME,
 925   ASSETS_PATH,
 926   FILES_CONTENT_HASH,
 927   loadLanguages,
 928   buildLanguages,
 929   generateContentHash
 930 }
 931
 932 // ---------------------------------------------------------------------------
 933
 934 function buildVideoMimetypeExt () {
 935   const data = {
 936     // streamable formats that warrant cross-browser compatibility
 937     'video/webm': '.webm',
 938     // We'll add .ogg if additional extensions are enabled
 939     // We could add .ogg here but since it could be an audio file,
 940     // it would be confusing for users because PeerTube will refuse their file (based on the mimetype)
 941     'video/ogg': [ '.ogv' ],
 942     'video/mp4': '.mp4'
 943   }
 944
 945   if (CONFIG.TRANSCODING.ENABLED) {
 946     if (CONFIG.TRANSCODING.ALLOW_ADDITIONAL_EXTENSIONS) {
 947       data['video/ogg'].push('.ogg')
 948
 949       Object.assign(data, {
 950         'video/x-matroska': '.mkv',
 951
 952         // Developed by Apple
 953         'video/quicktime': [ '.mov', '.qt', '.mqv' ], // often used as output format by editing software
 954         'video/x-m4v': '.m4v',
 955         'video/m4v': '.m4v',
 956
 957         // Developed by the Adobe Flash Platform
 958         'video/x-flv': '.flv',
 959         'video/x-f4v': '.f4v', // replacement for flv
 960
 961         // Developed by Microsoft
 962         'video/x-ms-wmv': '.wmv',
 963         'video/x-msvideo': '.avi',
 964         'video/avi': '.avi',
 965
 966         // Developed by 3GPP
 967         // common video formats for cell phones
 968         'video/3gpp': [ '.3gp', '.3gpp' ],
 969         'video/3gpp2': [ '.3g2', '.3gpp2' ],
 970
 971         // Developed by FFmpeg/Mplayer
 972         'application/x-nut': '.nut',
 973
 974         // The standard video format used by many Sony and Panasonic HD camcorders.
 975         // It is also used for storing high definition video on Blu-ray discs.
 976         'video/mp2t': '.mts',
 977         'video/m2ts': '.m2ts',
 978
 979         // Old formats reliant on MPEG-1/MPEG-2
 980         'video/mpv': '.mpv',
 981         'video/mpeg2': '.m2v',
 982         'video/mpeg': [ '.m1v', '.mpg', '.mpe', '.mpeg', '.vob' ],
 983         'video/dvd': '.vob',
 984
 985         // Could be anything
 986         'application/octet-stream': null,
 987         'application/mxf': '.mxf' // often used as exchange format by editing software
 988       })
 989     }
 990
 991     if (CONFIG.TRANSCODING.ALLOW_AUDIO_FILES) {
 992       Object.assign(data, MIMETYPES.AUDIO.MIMETYPE_EXT)
 993     }
 994   }
 995
 996   return data
 997 }
 998
 999 function updateWebserverUrls () {
1000   WEBSERVER.URL = sanitizeUrl(CONFIG.WEBSERVER.SCHEME + '://' + CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.WEBSERVER.PORT)
1001   WEBSERVER.HOST = sanitizeHost(CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.WEBSERVER.PORT, REMOTE_SCHEME.HTTP)
1002   WEBSERVER.WS = CONFIG.WEBSERVER.WS
1003
1004   WEBSERVER.SCHEME = CONFIG.WEBSERVER.SCHEME
1005   WEBSERVER.HOSTNAME = CONFIG.WEBSERVER.HOSTNAME
1006   WEBSERVER.PORT = CONFIG.WEBSERVER.PORT
1007
1008   WEBSERVER.RTMP_URL = 'rtmp://' + CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.LIVE.RTMP.PORT + '/' + VIDEO_LIVE.RTMP.BASE_PATH
1009   WEBSERVER.RTMPS_URL = 'rtmps://' + CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.LIVE.RTMPS.PORT + '/' + VIDEO_LIVE.RTMP.BASE_PATH
1010 }
1011
1012 function updateWebserverConfig () {
1013   MIMETYPES.VIDEO.MIMETYPE_EXT = buildVideoMimetypeExt()
1014   MIMETYPES.VIDEO.MIMETYPES_REGEX = buildMimetypesRegex(MIMETYPES.VIDEO.MIMETYPE_EXT)
1015
1016   ACTIVITY_PUB.URL_MIME_TYPES.VIDEO = Object.keys(MIMETYPES.VIDEO.MIMETYPE_EXT)
1017
1018   MIMETYPES.VIDEO.EXT_MIMETYPE = buildVideoExtMimetype(MIMETYPES.VIDEO.MIMETYPE_EXT)
1019
1020   CONSTRAINTS_FIELDS.VIDEOS.EXTNAME = Object.keys(MIMETYPES.VIDEO.EXT_MIMETYPE)
1021 }
1022
1023 function buildVideoExtMimetype (obj: { [ id: string ]: string | string[] }) {
1024   const result: { [id: string]: string } = {}
1025
1026   for (const mimetype of Object.keys(obj)) {
1027     const value = obj[mimetype]
1028     if (!value) continue
1029
1030     const extensions = Array.isArray(value) ? value : [ value ]
1031
1032     for (const extension of extensions) {
1033       result[extension] = mimetype
1034     }
1035   }
1036
1037   return result
1038 }
1039
1040 function buildMimetypesRegex (obj: { [id: string]: string | string[] }) {
1041   return Object.keys(obj)
1042     .map(m => `(${m})`)
1043     .join('|')
1044 }
1045
1046 function loadLanguages () {
1047   Object.assign(VIDEO_LANGUAGES, buildLanguages())
1048 }
1049
1050 function buildLanguages () {
1051   const iso639 = require('iso-639-3')
1052
1053   const languages: { [id: string]: string } = {}
1054
1055   const additionalLanguages = {
1056     sgn: true, // Sign languages (macro language)
1057     ase: true, // American sign language
1058     sdl: true, // Arabian sign language
1059     bfi: true, // British sign language
1060     bzs: true, // Brazilian sign language
1061     csl: true, // Chinese sign language
1062     cse: true, // Czech sign language
1063     dsl: true, // Danish sign language
1064     fsl: true, // French sign language
1065     gsg: true, // German sign language
1066     pks: true, // Pakistan sign language
1067     jsl: true, // Japanese sign language
1068     sfs: true, // South African sign language
1069     swl: true, // Swedish sign language
1070     rsl: true, // Russian sign language
1071
1072     kab: true, // Kabyle
1073
1074     lat: true, // Latin
1075
1076     epo: true, // Esperanto
1077     tlh: true, // Klingon
1078     jbo: true, // Lojban
1079     avk: true, // Kotava
1080
1081     zxx: true // No linguistic content (ISO-639-2)
1082   }
1083
1084   // Only add ISO639-1 languages and some sign languages (ISO639-3)
1085   iso639
1086     .filter(l => {
1087       return (l.iso6391 !== undefined && l.type === 'living') ||
1088         additionalLanguages[l.iso6393] === true
1089     })
1090     .forEach(l => { languages[l.iso6391 || l.iso6393] = l.name })
1091
1092   // Override Occitan label
1093   languages['oc'] = 'Occitan'
1094   languages['el'] = 'Greek'
1095
1096   return languages
1097 }
1098
1099 function generateContentHash () {
1100   return randomBytes(20).toString('hex')
1101 }