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