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, parseDurationToMs, 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 CRAWL_REQUEST_CONCURRENCY = 1 // How many requests in parallel to fetch remote data (likes, shares...)
 204
 205 const AP_CLEANER = {
 206   CONCURRENCY: 10, // How many requests in parallel we do in activitypub-cleaner job
 207   UNAVAILABLE_TRESHOLD: 3, // How many attemps we do before removing an unavailable remote resource
 208   PERIOD: parseDurationToMs('1 week') // /!\ Has to be sync with REPEAT_JOBS
 209 }
 210
 211 const REQUEST_TIMEOUTS = {
 212   DEFAULT: 7000, // 7 seconds
 213   FILE: 30000, // 30 seconds
 214   REDUNDANCY: JOB_TTL['video-redundancy']
 215 }
 216
 217 const JOB_COMPLETED_LIFETIME = 60000 * 60 * 24 * 2 // 2 days
 218 const VIDEO_IMPORT_TIMEOUT = 1000 * 3600 // 1 hour
 219
 220 const SCHEDULER_INTERVALS_MS = {
 221   ACTOR_FOLLOW_SCORES: 60000 * 60, // 1 hour
 222   REMOVE_OLD_JOBS: 60000 * 60, // 1 hour
 223   UPDATE_VIDEOS: 60000, // 1 minute
 224   YOUTUBE_DL_UPDATE: 60000 * 60 * 24, // 1 day
 225   VIDEO_VIEWS_BUFFER_UPDATE: CONFIG.VIEWS.VIDEOS.LOCAL_BUFFER_UPDATE_INTERVAL,
 226   CHECK_PLUGINS: CONFIG.PLUGINS.INDEX.CHECK_LATEST_VERSIONS_INTERVAL,
 227   CHECK_PEERTUBE_VERSION: 60000 * 60 * 24, // 1 day
 228   AUTO_FOLLOW_INDEX_INSTANCES: 60000 * 60 * 24, // 1 day
 229   REMOVE_OLD_VIEWS: 60000 * 60 * 24, // 1 day
 230   REMOVE_OLD_HISTORY: 60000 * 60 * 24, // 1 day
 231   UPDATE_INBOX_STATS: 1000 * 60, // 1 minute
 232   REMOVE_DANGLING_RESUMABLE_UPLOADS: 60000 * 60 // 1 hour
 233 }
 234
 235 // ---------------------------------------------------------------------------
 236
 237 const CONSTRAINTS_FIELDS = {
 238   USERS: {
 239     NAME: { min: 1, max: 120 }, // Length
 240     DESCRIPTION: { min: 3, max: 1000 }, // Length
 241     USERNAME: { min: 1, max: 50 }, // Length
 242     PASSWORD: { min: 6, max: 255 }, // Length
 243     VIDEO_QUOTA: { min: -1 },
 244     VIDEO_QUOTA_DAILY: { min: -1 },
 245     VIDEO_LANGUAGES: { max: 500 }, // Array length
 246     BLOCKED_REASON: { min: 3, max: 250 } // Length
 247   },
 248   ABUSES: {
 249     REASON: { min: 2, max: 3000 }, // Length
 250     MODERATION_COMMENT: { min: 2, max: 3000 } // Length
 251   },
 252   ABUSE_MESSAGES: {
 253     MESSAGE: { min: 2, max: 3000 } // Length
 254   },
 255   VIDEO_BLACKLIST: {
 256     REASON: { min: 2, max: 300 } // Length
 257   },
 258   VIDEO_CHANNELS: {
 259     NAME: { min: 1, max: 120 }, // Length
 260     DESCRIPTION: { min: 3, max: 1000 }, // Length
 261     SUPPORT: { min: 3, max: 1000 }, // Length
 262     URL: { min: 3, max: 2000 } // Length
 263   },
 264   VIDEO_CAPTIONS: {
 265     CAPTION_FILE: {
 266       EXTNAME: [ '.vtt', '.srt' ],
 267       FILE_SIZE: {
 268         max: 20 * 1024 * 1024 // 20MB
 269       }
 270     }
 271   },
 272   VIDEO_IMPORTS: {
 273     URL: { min: 3, max: 2000 }, // Length
 274     TORRENT_NAME: { min: 3, max: 255 }, // Length
 275     TORRENT_FILE: {
 276       EXTNAME: [ '.torrent' ],
 277       FILE_SIZE: {
 278         max: 1024 * 200 // 200 KB
 279       }
 280     }
 281   },
 282   VIDEOS_REDUNDANCY: {
 283     URL: { min: 3, max: 2000 } // Length
 284   },
 285   VIDEO_RATES: {
 286     URL: { min: 3, max: 2000 } // Length
 287   },
 288   VIDEOS: {
 289     NAME: { min: 3, max: 120 }, // Length
 290     LANGUAGE: { min: 1, max: 10 }, // Length
 291     TRUNCATED_DESCRIPTION: { min: 3, max: 250 }, // Length
 292     DESCRIPTION: { min: 3, max: 10000 }, // Length
 293     SUPPORT: { min: 3, max: 1000 }, // Length
 294     IMAGE: {
 295       EXTNAME: [ '.png', '.jpg', '.jpeg', '.webp' ],
 296       FILE_SIZE: {
 297         max: 4 * 1024 * 1024 // 4MB
 298       }
 299     },
 300     EXTNAME: [] as string[],
 301     INFO_HASH: { min: 40, max: 40 }, // Length, info hash is 20 bytes length but we represent it in hexadecimal so 20 * 2
 302     DURATION: { min: 0 }, // Number
 303     TAGS: { min: 0, max: 5 }, // Number of total tags
 304     TAG: { min: 2, max: 30 }, // Length
 305     VIEWS: { min: 0 },
 306     LIKES: { min: 0 },
 307     DISLIKES: { min: 0 },
 308     FILE_SIZE: { min: -1 },
 309     PARTIAL_UPLOAD_SIZE: { max: 50 * 1024 * 1024 * 1024 }, // 50GB
 310     URL: { min: 3, max: 2000 } // Length
 311   },
 312   VIDEO_PLAYLISTS: {
 313     NAME: { min: 1, max: 120 }, // Length
 314     DESCRIPTION: { min: 3, max: 1000 }, // Length
 315     URL: { min: 3, max: 2000 }, // Length
 316     IMAGE: {
 317       EXTNAME: [ '.jpg', '.jpeg' ],
 318       FILE_SIZE: {
 319         max: 4 * 1024 * 1024 // 4MB
 320       }
 321     }
 322   },
 323   ACTORS: {
 324     PUBLIC_KEY: { min: 10, max: 5000 }, // Length
 325     PRIVATE_KEY: { min: 10, max: 5000 }, // Length
 326     URL: { min: 3, max: 2000 }, // Length
 327     IMAGE: {
 328       EXTNAME: [ '.png', '.jpeg', '.jpg', '.gif', '.webp' ],
 329       FILE_SIZE: {
 330         max: 4 * 1024 * 1024 // 4MB
 331       }
 332     }
 333   },
 334   VIDEO_EVENTS: {
 335     COUNT: { min: 0 }
 336   },
 337   VIDEO_COMMENTS: {
 338     TEXT: { min: 1, max: 10000 }, // Length
 339     URL: { min: 3, max: 2000 } // Length
 340   },
 341   VIDEO_SHARE: {
 342     URL: { min: 3, max: 2000 } // Length
 343   },
 344   CONTACT_FORM: {
 345     FROM_NAME: { min: 1, max: 120 }, // Length
 346     BODY: { min: 3, max: 5000 } // Length
 347   },
 348   PLUGINS: {
 349     NAME: { min: 1, max: 214 }, // Length
 350     DESCRIPTION: { min: 1, max: 20000 } // Length
 351   },
 352   COMMONS: {
 353     URL: { min: 5, max: 2000 } // Length
 354   }
 355 }
 356
 357 const VIEW_LIFETIME = {
 358   VIEW: CONFIG.VIEWS.VIDEOS.IP_VIEW_EXPIRATION,
 359   VIEWER: 60000 * 5 // 5 minutes
 360 }
 361
 362 let CONTACT_FORM_LIFETIME = 60000 * 60 // 1 hour
 363
 364 const VIDEO_TRANSCODING_FPS: VideoTranscodingFPS = {
 365   MIN: 1,
 366   STANDARD: [ 24, 25, 30 ],
 367   HD_STANDARD: [ 50, 60 ],
 368   AVERAGE: 30,
 369   MAX: 60,
 370   KEEP_ORIGIN_FPS_RESOLUTION_MIN: 720 // We keep the original FPS on high resolutions (720 minimum)
 371 }
 372
 373 const DEFAULT_AUDIO_RESOLUTION = VideoResolution.H_480P
 374
 375 const VIDEO_RATE_TYPES: { [ id: string ]: VideoRateType } = {
 376   LIKE: 'like',
 377   DISLIKE: 'dislike'
 378 }
 379
 380 const FFMPEG_NICE: { [ id: string ]: number } = {
 381   // parent process defaults to niceness = 0
 382   // reminder: lower = higher priority, max value is 19, lowest is -20
 383   LIVE: 5, // prioritize over VOD and THUMBNAIL
 384   THUMBNAIL: 10,
 385   VOD: 15
 386 }
 387
 388 const VIDEO_CATEGORIES = {
 389   1: 'Music',
 390   2: 'Films',
 391   3: 'Vehicles',
 392   4: 'Art',
 393   5: 'Sports',
 394   6: 'Travels',
 395   7: 'Gaming',
 396   8: 'People',
 397   9: 'Comedy',
 398   10: 'Entertainment',
 399   11: 'News & Politics',
 400   12: 'How To',
 401   13: 'Education',
 402   14: 'Activism',
 403   15: 'Science & Technology',
 404   16: 'Animals',
 405   17: 'Kids',
 406   18: 'Food'
 407 }
 408
 409 // See https://creativecommons.org/licenses/?lang=en
 410 const VIDEO_LICENCES = {
 411   1: 'Attribution',
 412   2: 'Attribution - Share Alike',
 413   3: 'Attribution - No Derivatives',
 414   4: 'Attribution - Non Commercial',
 415   5: 'Attribution - Non Commercial - Share Alike',
 416   6: 'Attribution - Non Commercial - No Derivatives',
 417   7: 'Public Domain Dedication'
 418 }
 419
 420 const VIDEO_LANGUAGES: { [id: string]: string } = {}
 421
 422 const VIDEO_PRIVACIES: { [ id in VideoPrivacy ]: string } = {
 423   [VideoPrivacy.PUBLIC]: 'Public',
 424   [VideoPrivacy.UNLISTED]: 'Unlisted',
 425   [VideoPrivacy.PRIVATE]: 'Private',
 426   [VideoPrivacy.INTERNAL]: 'Internal'
 427 }
 428
 429 const VIDEO_STATES: { [ id in VideoState ]: string } = {
 430   [VideoState.PUBLISHED]: 'Published',
 431   [VideoState.TO_TRANSCODE]: 'To transcode',
 432   [VideoState.TO_IMPORT]: 'To import',
 433   [VideoState.WAITING_FOR_LIVE]: 'Waiting for livestream',
 434   [VideoState.LIVE_ENDED]: 'Livestream ended',
 435   [VideoState.TO_MOVE_TO_EXTERNAL_STORAGE]: 'To move to an external storage',
 436   [VideoState.TRANSCODING_FAILED]: 'Transcoding failed',
 437   [VideoState.TO_MOVE_TO_EXTERNAL_STORAGE_FAILED]: 'External storage move failed'
 438 }
 439
 440 const VIDEO_IMPORT_STATES: { [ id in VideoImportState ]: string } = {
 441   [VideoImportState.FAILED]: 'Failed',
 442   [VideoImportState.PENDING]: 'Pending',
 443   [VideoImportState.SUCCESS]: 'Success',
 444   [VideoImportState.REJECTED]: 'Rejected',
 445   [VideoImportState.CANCELLED]: 'Cancelled',
 446   [VideoImportState.PROCESSING]: 'Processing'
 447 }
 448
 449 const ABUSE_STATES: { [ id in AbuseState ]: string } = {
 450   [AbuseState.PENDING]: 'Pending',
 451   [AbuseState.REJECTED]: 'Rejected',
 452   [AbuseState.ACCEPTED]: 'Accepted'
 453 }
 454
 455 const VIDEO_PLAYLIST_PRIVACIES: { [ id in VideoPlaylistPrivacy ]: string } = {
 456   [VideoPlaylistPrivacy.PUBLIC]: 'Public',
 457   [VideoPlaylistPrivacy.UNLISTED]: 'Unlisted',
 458   [VideoPlaylistPrivacy.PRIVATE]: 'Private'
 459 }
 460
 461 const VIDEO_PLAYLIST_TYPES: { [ id in VideoPlaylistType ]: string } = {
 462   [VideoPlaylistType.REGULAR]: 'Regular',
 463   [VideoPlaylistType.WATCH_LATER]: 'Watch later'
 464 }
 465
 466 const MIMETYPES = {
 467   AUDIO: {
 468     MIMETYPE_EXT: {
 469       'audio/mpeg': '.mp3',
 470       'audio/mp3': '.mp3',
 471       'application/ogg': '.ogg',
 472       'audio/ogg': '.ogg',
 473       'audio/x-ms-wma': '.wma',
 474       'audio/wav': '.wav',
 475       'audio/x-wav': '.wav',
 476       'audio/x-flac': '.flac',
 477       'audio/flac': '.flac',
 478       'audio/aac': '.aac',
 479       'audio/m4a': '.m4a',
 480       'audio/mp4': '.m4a',
 481       'audio/x-m4a': '.m4a',
 482       'audio/ac3': '.ac3'
 483     },
 484     EXT_MIMETYPE: null as { [ id: string ]: string }
 485   },
 486   VIDEO: {
 487     MIMETYPE_EXT: null as { [ id: string ]: string | string[] },
 488     MIMETYPES_REGEX: null as string,
 489     EXT_MIMETYPE: null as { [ id: string ]: string }
 490   },
 491   IMAGE: {
 492     MIMETYPE_EXT: {
 493       'image/png': '.png',
 494       'image/gif': '.gif',
 495       'image/webp': '.webp',
 496       'image/jpg': '.jpg',
 497       'image/jpeg': '.jpg'
 498     },
 499     EXT_MIMETYPE: null as { [ id: string ]: string }
 500   },
 501   VIDEO_CAPTIONS: {
 502     MIMETYPE_EXT: {
 503       'text/vtt': '.vtt',
 504       'application/x-subrip': '.srt',
 505       'text/plain': '.srt'
 506     }
 507   },
 508   TORRENT: {
 509     MIMETYPE_EXT: {
 510       'application/x-bittorrent': '.torrent'
 511     }
 512   }
 513 }
 514 MIMETYPES.AUDIO.EXT_MIMETYPE = invert(MIMETYPES.AUDIO.MIMETYPE_EXT)
 515 MIMETYPES.IMAGE.EXT_MIMETYPE = invert(MIMETYPES.IMAGE.MIMETYPE_EXT)
 516
 517 const BINARY_CONTENT_TYPES = new Set([
 518   'binary/octet-stream',
 519   'application/octet-stream',
 520   'application/x-binary'
 521 ])
 522
 523 // ---------------------------------------------------------------------------
 524
 525 const OVERVIEWS = {
 526   VIDEOS: {
 527     SAMPLE_THRESHOLD: 6,
 528     SAMPLES_COUNT: 20
 529   }
 530 }
 531
 532 // ---------------------------------------------------------------------------
 533
 534 const SERVER_ACTOR_NAME = 'peertube'
 535
 536 const ACTIVITY_PUB = {
 537   POTENTIAL_ACCEPT_HEADERS: [
 538     'application/activity+json',
 539     'application/ld+json',
 540     'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'
 541   ],
 542   ACCEPT_HEADER: 'application/activity+json, application/ld+json',
 543   PUBLIC: 'https://www.w3.org/ns/activitystreams#Public',
 544   COLLECTION_ITEMS_PER_PAGE: 10,
 545   FETCH_PAGE_LIMIT: 2000,
 546   URL_MIME_TYPES: {
 547     VIDEO: [] as string[],
 548     TORRENT: [ 'application/x-bittorrent' ],
 549     MAGNET: [ 'application/x-bittorrent;x-scheme-handler/magnet' ]
 550   },
 551   MAX_RECURSION_COMMENTS: 100,
 552   ACTOR_REFRESH_INTERVAL: 3600 * 24 * 1000 * 2, // 2 days
 553   VIDEO_REFRESH_INTERVAL: 3600 * 24 * 1000 * 2, // 2 days
 554   VIDEO_PLAYLIST_REFRESH_INTERVAL: 3600 * 24 * 1000 * 2 // 2 days
 555 }
 556
 557 const ACTIVITY_PUB_ACTOR_TYPES: { [ id: string ]: ActivityPubActorType } = {
 558   GROUP: 'Group',
 559   PERSON: 'Person',
 560   APPLICATION: 'Application',
 561   ORGANIZATION: 'Organization',
 562   SERVICE: 'Service'
 563 }
 564
 565 const HTTP_SIGNATURE = {
 566   HEADER_NAME: 'signature',
 567   ALGORITHM: 'rsa-sha256',
 568   HEADERS_TO_SIGN: [ '(request-target)', 'host', 'date', 'digest' ],
 569   REQUIRED_HEADERS: {
 570     ALL: [ '(request-target)', 'host', 'date' ],
 571     POST: [ '(request-target)', 'host', 'date', 'digest' ]
 572   },
 573   CLOCK_SKEW_SECONDS: 1800
 574 }
 575
 576 // ---------------------------------------------------------------------------
 577
 578 let PRIVATE_RSA_KEY_SIZE = 2048
 579
 580 // Password encryption
 581 const BCRYPT_SALT_SIZE = 10
 582
 583 const USER_PASSWORD_RESET_LIFETIME = 60000 * 60 // 60 minutes
 584 const USER_PASSWORD_CREATE_LIFETIME = 60000 * 60 * 24 * 7 // 7 days
 585
 586 const USER_EMAIL_VERIFY_LIFETIME = 60000 * 60 // 60 minutes
 587
 588 const NSFW_POLICY_TYPES: { [ id: string ]: NSFWPolicyType } = {
 589   DO_NOT_LIST: 'do_not_list',
 590   BLUR: 'blur',
 591   DISPLAY: 'display'
 592 }
 593
 594 // ---------------------------------------------------------------------------
 595
 596 // Express static paths (router)
 597 const STATIC_PATHS = {
 598   THUMBNAILS: '/static/thumbnails/',
 599   WEBSEED: '/static/webseed/',
 600   REDUNDANCY: '/static/redundancy/',
 601   STREAMING_PLAYLISTS: {
 602     HLS: '/static/streaming-playlists/hls'
 603   }
 604 }
 605 const STATIC_DOWNLOAD_PATHS = {
 606   TORRENTS: '/download/torrents/',
 607   VIDEOS: '/download/videos/',
 608   HLS_VIDEOS: '/download/streaming-playlists/hls/videos/'
 609 }
 610 const LAZY_STATIC_PATHS = {
 611   BANNERS: '/lazy-static/banners/',
 612   AVATARS: '/lazy-static/avatars/',
 613   PREVIEWS: '/lazy-static/previews/',
 614   VIDEO_CAPTIONS: '/lazy-static/video-captions/',
 615   TORRENTS: '/lazy-static/torrents/'
 616 }
 617
 618 // Cache control
 619 const STATIC_MAX_AGE = {
 620   SERVER: '2h',
 621   LAZY_SERVER: '2d',
 622   CLIENT: '30d'
 623 }
 624
 625 // Videos thumbnail size
 626 const THUMBNAILS_SIZE = {
 627   width: 280,
 628   height: 157,
 629   minWidth: 150
 630 }
 631 const PREVIEWS_SIZE = {
 632   width: 850,
 633   height: 480,
 634   minWidth: 400
 635 }
 636 const ACTOR_IMAGES_SIZE = {
 637   AVATARS: {
 638     width: 120,
 639     height: 120
 640   },
 641   BANNERS: {
 642     width: 1920,
 643     height: 317 // 6/1 ratio
 644   }
 645 }
 646
 647 const EMBED_SIZE = {
 648   width: 560,
 649   height: 315
 650 }
 651
 652 // Sub folders of cache directory
 653 const FILES_CACHE = {
 654   PREVIEWS: {
 655     DIRECTORY: join(CONFIG.STORAGE.CACHE_DIR, 'previews'),
 656     MAX_AGE: 1000 * 3600 * 3 // 3 hours
 657   },
 658   VIDEO_CAPTIONS: {
 659     DIRECTORY: join(CONFIG.STORAGE.CACHE_DIR, 'video-captions'),
 660     MAX_AGE: 1000 * 3600 * 3 // 3 hours
 661   },
 662   TORRENTS: {
 663     DIRECTORY: join(CONFIG.STORAGE.CACHE_DIR, 'torrents'),
 664     MAX_AGE: 1000 * 3600 * 3 // 3 hours
 665   }
 666 }
 667
 668 const LRU_CACHE = {
 669   USER_TOKENS: {
 670     MAX_SIZE: 1000
 671   },
 672   ACTOR_IMAGE_STATIC: {
 673     MAX_SIZE: 500
 674   }
 675 }
 676
 677 const RESUMABLE_UPLOAD_DIRECTORY = join(CONFIG.STORAGE.TMP_DIR, 'resumable-uploads')
 678 const HLS_STREAMING_PLAYLIST_DIRECTORY = join(CONFIG.STORAGE.STREAMING_PLAYLISTS_DIR, 'hls')
 679 const HLS_REDUNDANCY_DIRECTORY = join(CONFIG.STORAGE.REDUNDANCY_DIR, 'hls')
 680
 681 const RESUMABLE_UPLOAD_SESSION_LIFETIME = SCHEDULER_INTERVALS_MS.REMOVE_DANGLING_RESUMABLE_UPLOADS
 682
 683 const VIDEO_LIVE = {
 684   EXTENSION: '.ts',
 685   CLEANUP_DELAY: 1000 * 60 * 5, // 5 minutes
 686   SEGMENT_TIME_SECONDS: 4, // 4 seconds
 687   SEGMENTS_LIST_SIZE: 15, // 15 maximum segments in live playlist
 688   REPLAY_DIRECTORY: 'replay',
 689   EDGE_LIVE_DELAY_SEGMENTS_NOTIFICATION: 4,
 690   MAX_SOCKET_WAITING_DATA: 1024 * 1000 * 100, // 100MB
 691   RTMP: {
 692     CHUNK_SIZE: 60000,
 693     GOP_CACHE: true,
 694     PING: 60,
 695     PING_TIMEOUT: 30,
 696     BASE_PATH: 'live'
 697   }
 698 }
 699
 700 const MEMOIZE_TTL = {
 701   OVERVIEWS_SAMPLE: 1000 * 3600 * 4, // 4 hours
 702   INFO_HASH_EXISTS: 1000 * 3600 * 12, // 12 hours
 703   LIVE_ABLE_TO_UPLOAD: 1000 * 60, // 1 minute
 704   LIVE_CHECK_SOCKET_HEALTH: 1000 * 60 // 1 minute
 705 }
 706
 707 const MEMOIZE_LENGTH = {
 708   INFO_HASH_EXISTS: 200
 709 }
 710
 711 const QUEUE_CONCURRENCY = {
 712   ACTOR_PROCESS_IMAGE: 3
 713 }
 714
 715 const REDUNDANCY = {
 716   VIDEOS: {
 717     RANDOMIZED_FACTOR: 5
 718   }
 719 }
 720
 721 const ACCEPT_HEADERS = [ 'html', 'application/json' ].concat(ACTIVITY_PUB.POTENTIAL_ACCEPT_HEADERS)
 722
 723 const ASSETS_PATH = {
 724   DEFAULT_AUDIO_BACKGROUND: join(root(), 'dist', 'server', 'assets', 'default-audio-background.jpg'),
 725   DEFAULT_LIVE_BACKGROUND: join(root(), 'dist', 'server', 'assets', 'default-live-background.jpg')
 726 }
 727
 728 // ---------------------------------------------------------------------------
 729
 730 const CUSTOM_HTML_TAG_COMMENTS = {
 731   TITLE: '<!-- title tag -->',
 732   DESCRIPTION: '<!-- description tag -->',
 733   CUSTOM_CSS: '<!-- custom css tag -->',
 734   META_TAGS: '<!-- meta tags -->',
 735   SERVER_CONFIG: '<!-- server config -->'
 736 }
 737
 738 // ---------------------------------------------------------------------------
 739
 740 const FEEDS = {
 741   COUNT: 20
 742 }
 743
 744 const MAX_LOGS_OUTPUT_CHARACTERS = 10 * 1000 * 1000
 745 const LOG_FILENAME = 'peertube.log'
 746 const AUDIT_LOG_FILENAME = 'peertube-audit.log'
 747
 748 // ---------------------------------------------------------------------------
 749
 750 const TRACKER_RATE_LIMITS = {
 751   INTERVAL: 60000 * 5, // 5 minutes
 752   ANNOUNCES_PER_IP_PER_INFOHASH: 15, // maximum announces per torrent in the interval
 753   ANNOUNCES_PER_IP: 30, // maximum announces for all our torrents in the interval
 754   BLOCK_IP_LIFETIME: 60000 * 3 // 3 minutes
 755 }
 756
 757 const P2P_MEDIA_LOADER_PEER_VERSION = 2
 758
 759 // ---------------------------------------------------------------------------
 760
 761 const PLUGIN_GLOBAL_CSS_FILE_NAME = 'plugins-global.css'
 762 const PLUGIN_GLOBAL_CSS_PATH = join(CONFIG.STORAGE.TMP_DIR, PLUGIN_GLOBAL_CSS_FILE_NAME)
 763
 764 let PLUGIN_EXTERNAL_AUTH_TOKEN_LIFETIME = 1000 * 60 * 5 // 5 minutes
 765
 766 const DEFAULT_THEME_NAME = 'default'
 767 const DEFAULT_USER_THEME_NAME = 'instance-default'
 768
 769 // ---------------------------------------------------------------------------
 770
 771 const SEARCH_INDEX = {
 772   ROUTES: {
 773     VIDEOS: '/api/v1/search/videos',
 774     VIDEO_CHANNELS: '/api/v1/search/video-channels'
 775   }
 776 }
 777
 778 // ---------------------------------------------------------------------------
 779
 780 // Special constants for a test instance
 781 if (isTestInstance() === true) {
 782   PRIVATE_RSA_KEY_SIZE = 1024
 783
 784   ACTOR_FOLLOW_SCORE.BASE = 20
 785
 786   REMOTE_SCHEME.HTTP = 'http'
 787   REMOTE_SCHEME.WS = 'ws'
 788
 789   STATIC_MAX_AGE.SERVER = '0'
 790
 791   ACTIVITY_PUB.COLLECTION_ITEMS_PER_PAGE = 2
 792   ACTIVITY_PUB.ACTOR_REFRESH_INTERVAL = 10 * 1000 // 10 seconds
 793   ACTIVITY_PUB.VIDEO_REFRESH_INTERVAL = 10 * 1000 // 10 seconds
 794   ACTIVITY_PUB.VIDEO_PLAYLIST_REFRESH_INTERVAL = 10 * 1000 // 10 seconds
 795
 796   CONSTRAINTS_FIELDS.ACTORS.IMAGE.FILE_SIZE.max = 100 * 1024 // 100KB
 797   CONSTRAINTS_FIELDS.VIDEOS.IMAGE.FILE_SIZE.max = 400 * 1024 // 400KB
 798
 799   SCHEDULER_INTERVALS_MS.ACTOR_FOLLOW_SCORES = 1000
 800   SCHEDULER_INTERVALS_MS.REMOVE_OLD_JOBS = 10000
 801   SCHEDULER_INTERVALS_MS.REMOVE_OLD_HISTORY = 5000
 802   SCHEDULER_INTERVALS_MS.REMOVE_OLD_VIEWS = 5000
 803   SCHEDULER_INTERVALS_MS.UPDATE_VIDEOS = 5000
 804   SCHEDULER_INTERVALS_MS.AUTO_FOLLOW_INDEX_INSTANCES = 5000
 805   SCHEDULER_INTERVALS_MS.UPDATE_INBOX_STATS = 5000
 806   SCHEDULER_INTERVALS_MS.CHECK_PEERTUBE_VERSION = 2000
 807
 808   REPEAT_JOBS['videos-views-stats'] = { every: 5000 }
 809
 810   REPEAT_JOBS['activitypub-cleaner'] = { every: 5000 }
 811   AP_CLEANER.PERIOD = 5000
 812
 813   REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR = 1
 814
 815   VIEW_LIFETIME.VIEWER = 1000 * 5 // 5 second
 816   CONTACT_FORM_LIFETIME = 1000 // 1 second
 817
 818   JOB_ATTEMPTS['email'] = 1
 819
 820   FILES_CACHE.VIDEO_CAPTIONS.MAX_AGE = 3000
 821   MEMOIZE_TTL.OVERVIEWS_SAMPLE = 3000
 822   MEMOIZE_TTL.LIVE_ABLE_TO_UPLOAD = 3000
 823   OVERVIEWS.VIDEOS.SAMPLE_THRESHOLD = 2
 824
 825   PLUGIN_EXTERNAL_AUTH_TOKEN_LIFETIME = 5000
 826
 827   VIDEO_LIVE.CLEANUP_DELAY = 5000
 828   VIDEO_LIVE.SEGMENT_TIME_SECONDS = 2
 829   VIDEO_LIVE.EDGE_LIVE_DELAY_SEGMENTS_NOTIFICATION = 1
 830 }
 831
 832 updateWebserverUrls()
 833 updateWebserverConfig()
 834
 835 registerConfigChangedHandler(() => {
 836   updateWebserverUrls()
 837   updateWebserverConfig()
 838 })
 839
 840 // ---------------------------------------------------------------------------
 841
 842 const FILES_CONTENT_HASH = {
 843   MANIFEST: generateContentHash(),
 844   FAVICON: generateContentHash(),
 845   LOGO: generateContentHash()
 846 }
 847
 848 // ---------------------------------------------------------------------------
 849
 850 export {
 851   WEBSERVER,
 852   API_VERSION,
 853   VIDEO_LIVE,
 854   PEERTUBE_VERSION,
 855   LAZY_STATIC_PATHS,
 856   SEARCH_INDEX,
 857   RESUMABLE_UPLOAD_DIRECTORY,
 858   RESUMABLE_UPLOAD_SESSION_LIFETIME,
 859   HLS_REDUNDANCY_DIRECTORY,
 860   P2P_MEDIA_LOADER_PEER_VERSION,
 861   ACTOR_IMAGES_SIZE,
 862   ACCEPT_HEADERS,
 863   BCRYPT_SALT_SIZE,
 864   TRACKER_RATE_LIMITS,
 865   FILES_CACHE,
 866   LOG_FILENAME,
 867   CONSTRAINTS_FIELDS,
 868   EMBED_SIZE,
 869   REDUNDANCY,
 870   JOB_CONCURRENCY,
 871   JOB_ATTEMPTS,
 872   AP_CLEANER,
 873   LAST_MIGRATION_VERSION,
 874   OAUTH_LIFETIME,
 875   CUSTOM_HTML_TAG_COMMENTS,
 876   BROADCAST_CONCURRENCY,
 877   AUDIT_LOG_FILENAME,
 878   PAGINATION,
 879   ACTOR_FOLLOW_SCORE,
 880   PREVIEWS_SIZE,
 881   REMOTE_SCHEME,
 882   FOLLOW_STATES,
 883   DEFAULT_USER_THEME_NAME,
 884   SERVER_ACTOR_NAME,
 885   PLUGIN_GLOBAL_CSS_FILE_NAME,
 886   PLUGIN_GLOBAL_CSS_PATH,
 887   PRIVATE_RSA_KEY_SIZE,
 888   ROUTE_CACHE_LIFETIME,
 889   SORTABLE_COLUMNS,
 890   HLS_STREAMING_PLAYLIST_DIRECTORY,
 891   FEEDS,
 892   JOB_TTL,
 893   DEFAULT_THEME_NAME,
 894   NSFW_POLICY_TYPES,
 895   STATIC_MAX_AGE,
 896   STATIC_PATHS,
 897   VIDEO_IMPORT_TIMEOUT,
 898   VIDEO_PLAYLIST_TYPES,
 899   MAX_LOGS_OUTPUT_CHARACTERS,
 900   ACTIVITY_PUB,
 901   ACTIVITY_PUB_ACTOR_TYPES,
 902   THUMBNAILS_SIZE,
 903   VIDEO_CATEGORIES,
 904   MEMOIZE_LENGTH,
 905   VIDEO_LANGUAGES,
 906   VIDEO_PRIVACIES,
 907   VIDEO_LICENCES,
 908   VIDEO_STATES,
 909   QUEUE_CONCURRENCY,
 910   VIDEO_RATE_TYPES,
 911   JOB_PRIORITY,
 912   VIDEO_TRANSCODING_FPS,
 913   FFMPEG_NICE,
 914   ABUSE_STATES,
 915   LRU_CACHE,
 916   REQUEST_TIMEOUTS,
 917   USER_PASSWORD_RESET_LIFETIME,
 918   USER_PASSWORD_CREATE_LIFETIME,
 919   MEMOIZE_TTL,
 920   USER_EMAIL_VERIFY_LIFETIME,
 921   OVERVIEWS,
 922   SCHEDULER_INTERVALS_MS,
 923   REPEAT_JOBS,
 924   STATIC_DOWNLOAD_PATHS,
 925   MIMETYPES,
 926   CRAWL_REQUEST_CONCURRENCY,
 927   DEFAULT_AUDIO_RESOLUTION,
 928   BINARY_CONTENT_TYPES,
 929   JOB_COMPLETED_LIFETIME,
 930   HTTP_SIGNATURE,
 931   VIDEO_IMPORT_STATES,
 932   VIEW_LIFETIME,
 933   CONTACT_FORM_LIFETIME,
 934   VIDEO_PLAYLIST_PRIVACIES,
 935   PLUGIN_EXTERNAL_AUTH_TOKEN_LIFETIME,
 936   ASSETS_PATH,
 937   FILES_CONTENT_HASH,
 938   loadLanguages,
 939   buildLanguages,
 940   generateContentHash
 941 }
 942
 943 // ---------------------------------------------------------------------------
 944
 945 function buildVideoMimetypeExt () {
 946   const data = {
 947     // streamable formats that warrant cross-browser compatibility
 948     'video/webm': '.webm',
 949     // We'll add .ogg if additional extensions are enabled
 950     // We could add .ogg here but since it could be an audio file,
 951     // it would be confusing for users because PeerTube will refuse their file (based on the mimetype)
 952     'video/ogg': [ '.ogv' ],
 953     'video/mp4': '.mp4'
 954   }
 955
 956   if (CONFIG.TRANSCODING.ENABLED) {
 957     if (CONFIG.TRANSCODING.ALLOW_ADDITIONAL_EXTENSIONS) {
 958       data['video/ogg'].push('.ogg')
 959
 960       Object.assign(data, {
 961         'video/x-matroska': '.mkv',
 962
 963         // Developed by Apple
 964         'video/quicktime': [ '.mov', '.qt', '.mqv' ], // often used as output format by editing software
 965         'video/x-m4v': '.m4v',
 966         'video/m4v': '.m4v',
 967
 968         // Developed by the Adobe Flash Platform
 969         'video/x-flv': '.flv',
 970         'video/x-f4v': '.f4v', // replacement for flv
 971
 972         // Developed by Microsoft
 973         'video/x-ms-wmv': '.wmv',
 974         'video/x-msvideo': '.avi',
 975         'video/avi': '.avi',
 976
 977         // Developed by 3GPP
 978         // common video formats for cell phones
 979         'video/3gpp': [ '.3gp', '.3gpp' ],
 980         'video/3gpp2': [ '.3g2', '.3gpp2' ],
 981
 982         // Developed by FFmpeg/Mplayer
 983         'application/x-nut': '.nut',
 984
 985         // The standard video format used by many Sony and Panasonic HD camcorders.
 986         // It is also used for storing high definition video on Blu-ray discs.
 987         'video/mp2t': '.mts',
 988         'video/m2ts': '.m2ts',
 989
 990         // Old formats reliant on MPEG-1/MPEG-2
 991         'video/mpv': '.mpv',
 992         'video/mpeg2': '.m2v',
 993         'video/mpeg': [ '.m1v', '.mpg', '.mpe', '.mpeg', '.vob' ],
 994         'video/dvd': '.vob',
 995
 996         // Could be anything
 997         'application/octet-stream': null,
 998         'application/mxf': '.mxf' // often used as exchange format by editing software
 999       })
1000     }
1001
1002     if (CONFIG.TRANSCODING.ALLOW_AUDIO_FILES) {
1003       Object.assign(data, MIMETYPES.AUDIO.MIMETYPE_EXT)
1004     }
1005   }
1006
1007   return data
1008 }
1009
1010 function updateWebserverUrls () {
1011   WEBSERVER.URL = sanitizeUrl(CONFIG.WEBSERVER.SCHEME + '://' + CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.WEBSERVER.PORT)
1012   WEBSERVER.HOST = sanitizeHost(CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.WEBSERVER.PORT, REMOTE_SCHEME.HTTP)
1013   WEBSERVER.WS = CONFIG.WEBSERVER.WS
1014
1015   WEBSERVER.SCHEME = CONFIG.WEBSERVER.SCHEME
1016   WEBSERVER.HOSTNAME = CONFIG.WEBSERVER.HOSTNAME
1017   WEBSERVER.PORT = CONFIG.WEBSERVER.PORT
1018
1019   WEBSERVER.RTMP_URL = 'rtmp://' + CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.LIVE.RTMP.PORT + '/' + VIDEO_LIVE.RTMP.BASE_PATH
1020   WEBSERVER.RTMPS_URL = 'rtmps://' + CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.LIVE.RTMPS.PORT + '/' + VIDEO_LIVE.RTMP.BASE_PATH
1021 }
1022
1023 function updateWebserverConfig () {
1024   MIMETYPES.VIDEO.MIMETYPE_EXT = buildVideoMimetypeExt()
1025   MIMETYPES.VIDEO.MIMETYPES_REGEX = buildMimetypesRegex(MIMETYPES.VIDEO.MIMETYPE_EXT)
1026
1027   ACTIVITY_PUB.URL_MIME_TYPES.VIDEO = Object.keys(MIMETYPES.VIDEO.MIMETYPE_EXT)
1028
1029   MIMETYPES.VIDEO.EXT_MIMETYPE = buildVideoExtMimetype(MIMETYPES.VIDEO.MIMETYPE_EXT)
1030
1031   CONSTRAINTS_FIELDS.VIDEOS.EXTNAME = Object.keys(MIMETYPES.VIDEO.EXT_MIMETYPE)
1032 }
1033
1034 function buildVideoExtMimetype (obj: { [ id: string ]: string | string[] }) {
1035   const result: { [id: string]: string } = {}
1036
1037   for (const mimetype of Object.keys(obj)) {
1038     const value = obj[mimetype]
1039     if (!value) continue
1040
1041     const extensions = Array.isArray(value) ? value : [ value ]
1042
1043     for (const extension of extensions) {
1044       result[extension] = mimetype
1045     }
1046   }
1047
1048   return result
1049 }
1050
1051 function buildMimetypesRegex (obj: { [id: string]: string | string[] }) {
1052   return Object.keys(obj)
1053     .map(m => `(${m})`)
1054     .join('|')
1055 }
1056
1057 function loadLanguages () {
1058   Object.assign(VIDEO_LANGUAGES, buildLanguages())
1059 }
1060
1061 function buildLanguages () {
1062   const iso639 = require('iso-639-3')
1063
1064   const languages: { [id: string]: string } = {}
1065
1066   const additionalLanguages = {
1067     sgn: true, // Sign languages (macro language)
1068     ase: true, // American sign language
1069     sdl: true, // Arabian sign language
1070     bfi: true, // British sign language
1071     bzs: true, // Brazilian sign language
1072     csl: true, // Chinese sign language
1073     cse: true, // Czech sign language
1074     dsl: true, // Danish sign language
1075     fsl: true, // French sign language
1076     gsg: true, // German sign language
1077     pks: true, // Pakistan sign language
1078     jsl: true, // Japanese sign language
1079     sfs: true, // South African sign language
1080     swl: true, // Swedish sign language
1081     rsl: true, // Russian sign language
1082
1083     kab: true, // Kabyle
1084
1085     lat: true, // Latin
1086
1087     epo: true, // Esperanto
1088     tlh: true, // Klingon
1089     jbo: true, // Lojban
1090     avk: true, // Kotava
1091
1092     zxx: true // No linguistic content (ISO-639-2)
1093   }
1094
1095   // Only add ISO639-1 languages and some sign languages (ISO639-3)
1096   iso639
1097     .filter(l => {
1098       return (l.iso6391 !== undefined && l.type === 'living') ||
1099         additionalLanguages[l.iso6393] === true
1100     })
1101     .forEach(l => { languages[l.iso6391 || l.iso6393] = l.name })
1102
1103   // Override Occitan label
1104   languages['oc'] = 'Occitan'
1105   languages['el'] = 'Greek'
1106
1107   // Chinese languages
1108   languages['zh-Hans'] = 'Simplified Chinese'
1109   languages['zh-Hant'] = 'Traditional Chinese'
1110
1111   return languages
1112 }
1113
1114 function generateContentHash () {
1115   return randomBytes(20).toString('hex')
1116 }