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 { ActorImageType, 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 = 685
  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   'video-edition': 1,
 156   'move-to-object-storage': 3
 157 }
 158 // Excluded keys are jobs that can be configured by admins
 159 const JOB_CONCURRENCY: { [id in Exclude<JobType, 'video-transcoding' | 'video-import'>]: number } = {
 160   'activitypub-http-broadcast': 1,
 161   'activitypub-http-unicast': 10,
 162   'activitypub-http-fetcher': 3,
 163   'activitypub-cleaner': 1,
 164   'activitypub-follow': 1,
 165   'video-file-import': 1,
 166   'email': 5,
 167   'actor-keys': 1,
 168   'videos-views-stats': 1,
 169   'activitypub-refresher': 1,
 170   'video-redundancy': 1,
 171   'video-live-ending': 10,
 172   'video-edition': 1,
 173   'move-to-object-storage': 1
 174 }
 175 const JOB_TTL: { [id in JobType]: number } = {
 176   'activitypub-http-broadcast': 60000 * 10, // 10 minutes
 177   'activitypub-http-unicast': 60000 * 10, // 10 minutes
 178   'activitypub-http-fetcher': 1000 * 3600 * 10, // 10 hours
 179   'activitypub-follow': 60000 * 10, // 10 minutes
 180   'activitypub-cleaner': 1000 * 3600, // 1 hour
 181   'video-file-import': 1000 * 3600, // 1 hour
 182   'video-transcoding': 1000 * 3600 * 48, // 2 days, transcoding could be long
 183   'video-edition': 1000 * 3600 * 10, // 10 hours
 184   'video-import': 1000 * 3600 * 2, // 2 hours
 185   'email': 60000 * 10, // 10 minutes
 186   'actor-keys': 60000 * 20, // 20 minutes
 187   'videos-views-stats': undefined, // Unlimited
 188   'activitypub-refresher': 60000 * 10, // 10 minutes
 189   'video-redundancy': 1000 * 3600 * 3, // 3 hours
 190   'video-live-ending': 1000 * 60 * 10, // 10 minutes
 191   'move-to-object-storage': 1000 * 60 * 60 * 3 // 3 hours
 192 }
 193 const REPEAT_JOBS: { [ id in JobType ]?: EveryRepeatOptions | CronRepeatOptions } = {
 194   'videos-views-stats': {
 195     cron: randomInt(1, 20) + ' * * * *' // Between 1-20 minutes past the hour
 196   },
 197   'activitypub-cleaner': {
 198     cron: '30 5 * * ' + randomInt(0, 7) // 1 time per week (random day) at 5:30 AM
 199   }
 200 }
 201 const JOB_PRIORITY = {
 202   TRANSCODING: 100
 203 }
 204
 205 const BROADCAST_CONCURRENCY = 30 // How many requests in parallel we do in activitypub-http-broadcast job
 206 const CRAWL_REQUEST_CONCURRENCY = 1 // How many requests in parallel to fetch remote data (likes, shares...)
 207
 208 const AP_CLEANER = {
 209   CONCURRENCY: 10, // How many requests in parallel we do in activitypub-cleaner job
 210   UNAVAILABLE_TRESHOLD: 3, // How many attemps we do before removing an unavailable remote resource
 211   PERIOD: parseDurationToMs('1 week') // /!\ Has to be sync with REPEAT_JOBS
 212 }
 213
 214 const REQUEST_TIMEOUTS = {
 215   DEFAULT: 7000, // 7 seconds
 216   FILE: 30000, // 30 seconds
 217   REDUNDANCY: JOB_TTL['video-redundancy']
 218 }
 219
 220 const JOB_COMPLETED_LIFETIME = 60000 * 60 * 24 * 2 // 2 days
 221 const VIDEO_IMPORT_TIMEOUT = Math.floor(JOB_TTL['video-import'] * 0.9)
 222
 223 const SCHEDULER_INTERVALS_MS = {
 224   ACTOR_FOLLOW_SCORES: 60000 * 60, // 1 hour
 225   REMOVE_OLD_JOBS: 60000 * 60, // 1 hour
 226   UPDATE_VIDEOS: 60000, // 1 minute
 227   YOUTUBE_DL_UPDATE: 60000 * 60 * 24, // 1 day
 228   VIDEO_VIEWS_BUFFER_UPDATE: CONFIG.VIEWS.VIDEOS.LOCAL_BUFFER_UPDATE_INTERVAL,
 229   CHECK_PLUGINS: CONFIG.PLUGINS.INDEX.CHECK_LATEST_VERSIONS_INTERVAL,
 230   CHECK_PEERTUBE_VERSION: 60000 * 60 * 24, // 1 day
 231   AUTO_FOLLOW_INDEX_INSTANCES: 60000 * 60 * 24, // 1 day
 232   REMOVE_OLD_VIEWS: 60000 * 60 * 24, // 1 day
 233   REMOVE_OLD_HISTORY: 60000 * 60 * 24, // 1 day
 234   UPDATE_INBOX_STATS: 1000 * 60, // 1 minute
 235   REMOVE_DANGLING_RESUMABLE_UPLOADS: 60000 * 60 // 1 hour
 236 }
 237
 238 // ---------------------------------------------------------------------------
 239
 240 const CONSTRAINTS_FIELDS = {
 241   USERS: {
 242     NAME: { min: 1, max: 120 }, // Length
 243     DESCRIPTION: { min: 3, max: 1000 }, // Length
 244     USERNAME: { min: 1, max: 50 }, // Length
 245     PASSWORD: { min: 6, max: 255 }, // Length
 246     VIDEO_QUOTA: { min: -1 },
 247     VIDEO_QUOTA_DAILY: { min: -1 },
 248     VIDEO_LANGUAGES: { max: 500 }, // Array length
 249     BLOCKED_REASON: { min: 3, max: 250 } // Length
 250   },
 251   ABUSES: {
 252     REASON: { min: 2, max: 3000 }, // Length
 253     MODERATION_COMMENT: { min: 2, max: 3000 } // Length
 254   },
 255   ABUSE_MESSAGES: {
 256     MESSAGE: { min: 2, max: 3000 } // Length
 257   },
 258   VIDEO_BLACKLIST: {
 259     REASON: { min: 2, max: 300 } // Length
 260   },
 261   VIDEO_CHANNELS: {
 262     NAME: { min: 1, max: 120 }, // Length
 263     DESCRIPTION: { min: 3, max: 1000 }, // Length
 264     SUPPORT: { min: 3, max: 1000 }, // Length
 265     URL: { min: 3, max: 2000 } // Length
 266   },
 267   VIDEO_CAPTIONS: {
 268     CAPTION_FILE: {
 269       EXTNAME: [ '.vtt', '.srt' ],
 270       FILE_SIZE: {
 271         max: 20 * 1024 * 1024 // 20MB
 272       }
 273     }
 274   },
 275   VIDEO_IMPORTS: {
 276     URL: { min: 3, max: 2000 }, // Length
 277     TORRENT_NAME: { min: 3, max: 255 }, // Length
 278     TORRENT_FILE: {
 279       EXTNAME: [ '.torrent' ],
 280       FILE_SIZE: {
 281         max: 1024 * 200 // 200 KB
 282       }
 283     }
 284   },
 285   VIDEOS_REDUNDANCY: {
 286     URL: { min: 3, max: 2000 } // Length
 287   },
 288   VIDEO_RATES: {
 289     URL: { min: 3, max: 2000 } // Length
 290   },
 291   VIDEOS: {
 292     NAME: { min: 3, max: 120 }, // Length
 293     LANGUAGE: { min: 1, max: 10 }, // Length
 294     TRUNCATED_DESCRIPTION: { min: 3, max: 250 }, // Length
 295     DESCRIPTION: { min: 3, max: 10000 }, // Length
 296     SUPPORT: { min: 3, max: 1000 }, // Length
 297     IMAGE: {
 298       EXTNAME: [ '.png', '.jpg', '.jpeg', '.webp' ],
 299       FILE_SIZE: {
 300         max: 4 * 1024 * 1024 // 4MB
 301       }
 302     },
 303     EXTNAME: [] as string[],
 304     INFO_HASH: { min: 40, max: 40 }, // Length, info hash is 20 bytes length but we represent it in hexadecimal so 20 * 2
 305     DURATION: { min: 0 }, // Number
 306     TAGS: { min: 0, max: 5 }, // Number of total tags
 307     TAG: { min: 2, max: 30 }, // Length
 308     VIEWS: { min: 0 },
 309     LIKES: { min: 0 },
 310     DISLIKES: { min: 0 },
 311     FILE_SIZE: { min: -1 },
 312     PARTIAL_UPLOAD_SIZE: { max: 50 * 1024 * 1024 * 1024 }, // 50GB
 313     URL: { min: 3, max: 2000 } // Length
 314   },
 315   VIDEO_PLAYLISTS: {
 316     NAME: { min: 1, max: 120 }, // Length
 317     DESCRIPTION: { min: 3, max: 1000 }, // Length
 318     URL: { min: 3, max: 2000 }, // Length
 319     IMAGE: {
 320       EXTNAME: [ '.jpg', '.jpeg' ],
 321       FILE_SIZE: {
 322         max: 4 * 1024 * 1024 // 4MB
 323       }
 324     }
 325   },
 326   ACTORS: {
 327     PUBLIC_KEY: { min: 10, max: 5000 }, // Length
 328     PRIVATE_KEY: { min: 10, max: 5000 }, // Length
 329     URL: { min: 3, max: 2000 }, // Length
 330     IMAGE: {
 331       EXTNAME: [ '.png', '.jpeg', '.jpg', '.gif', '.webp' ],
 332       FILE_SIZE: {
 333         max: 4 * 1024 * 1024 // 4MB
 334       }
 335     }
 336   },
 337   VIDEO_EVENTS: {
 338     COUNT: { min: 0 }
 339   },
 340   VIDEO_COMMENTS: {
 341     TEXT: { min: 1, max: 10000 }, // Length
 342     URL: { min: 3, max: 2000 } // Length
 343   },
 344   VIDEO_SHARE: {
 345     URL: { min: 3, max: 2000 } // Length
 346   },
 347   CONTACT_FORM: {
 348     FROM_NAME: { min: 1, max: 120 }, // Length
 349     BODY: { min: 3, max: 5000 } // Length
 350   },
 351   PLUGINS: {
 352     NAME: { min: 1, max: 214 }, // Length
 353     DESCRIPTION: { min: 1, max: 20000 } // Length
 354   },
 355   COMMONS: {
 356     URL: { min: 5, max: 2000 } // Length
 357   },
 358   VIDEO_EDITOR: {
 359     TASKS: { min: 1, max: 10 }, // Number of tasks
 360     CUT_TIME: { min: 0 } // Value
 361   }
 362 }
 363
 364 const VIEW_LIFETIME = {
 365   VIEW: CONFIG.VIEWS.VIDEOS.IP_VIEW_EXPIRATION,
 366   VIEWER: 60000 * 5 // 5 minutes
 367 }
 368
 369 let CONTACT_FORM_LIFETIME = 60000 * 60 // 1 hour
 370
 371 const VIDEO_TRANSCODING_FPS: VideoTranscodingFPS = {
 372   MIN: 1,
 373   STANDARD: [ 24, 25, 30 ],
 374   HD_STANDARD: [ 50, 60 ],
 375   AUDIO_MERGE: 25,
 376   AVERAGE: 30,
 377   MAX: 60,
 378   KEEP_ORIGIN_FPS_RESOLUTION_MIN: 720 // We keep the original FPS on high resolutions (720 minimum)
 379 }
 380
 381 const DEFAULT_AUDIO_RESOLUTION = VideoResolution.H_480P
 382
 383 const VIDEO_RATE_TYPES: { [ id: string ]: VideoRateType } = {
 384   LIKE: 'like',
 385   DISLIKE: 'dislike'
 386 }
 387
 388 const FFMPEG_NICE: { [ id: string ]: number } = {
 389   // parent process defaults to niceness = 0
 390   // reminder: lower = higher priority, max value is 19, lowest is -20
 391   LIVE: 5, // prioritize over VOD and THUMBNAIL
 392   THUMBNAIL: 10,
 393   VOD: 15
 394 }
 395
 396 const VIDEO_CATEGORIES = {
 397   1: 'Music',
 398   2: 'Films',
 399   3: 'Vehicles',
 400   4: 'Art',
 401   5: 'Sports',
 402   6: 'Travels',
 403   7: 'Gaming',
 404   8: 'People',
 405   9: 'Comedy',
 406   10: 'Entertainment',
 407   11: 'News & Politics',
 408   12: 'How To',
 409   13: 'Education',
 410   14: 'Activism',
 411   15: 'Science & Technology',
 412   16: 'Animals',
 413   17: 'Kids',
 414   18: 'Food'
 415 }
 416
 417 // See https://creativecommons.org/licenses/?lang=en
 418 const VIDEO_LICENCES = {
 419   1: 'Attribution',
 420   2: 'Attribution - Share Alike',
 421   3: 'Attribution - No Derivatives',
 422   4: 'Attribution - Non Commercial',
 423   5: 'Attribution - Non Commercial - Share Alike',
 424   6: 'Attribution - Non Commercial - No Derivatives',
 425   7: 'Public Domain Dedication'
 426 }
 427
 428 const VIDEO_LANGUAGES: { [id: string]: string } = {}
 429
 430 const VIDEO_PRIVACIES: { [ id in VideoPrivacy ]: string } = {
 431   [VideoPrivacy.PUBLIC]: 'Public',
 432   [VideoPrivacy.UNLISTED]: 'Unlisted',
 433   [VideoPrivacy.PRIVATE]: 'Private',
 434   [VideoPrivacy.INTERNAL]: 'Internal'
 435 }
 436
 437 const VIDEO_STATES: { [ id in VideoState ]: string } = {
 438   [VideoState.PUBLISHED]: 'Published',
 439   [VideoState.TO_TRANSCODE]: 'To transcode',
 440   [VideoState.TO_IMPORT]: 'To import',
 441   [VideoState.WAITING_FOR_LIVE]: 'Waiting for livestream',
 442   [VideoState.LIVE_ENDED]: 'Livestream ended',
 443   [VideoState.TO_MOVE_TO_EXTERNAL_STORAGE]: 'To move to an external storage',
 444   [VideoState.TRANSCODING_FAILED]: 'Transcoding failed',
 445   [VideoState.TO_MOVE_TO_EXTERNAL_STORAGE_FAILED]: 'External storage move failed',
 446   [VideoState.TO_EDIT]: 'To edit*'
 447 }
 448
 449 const VIDEO_IMPORT_STATES: { [ id in VideoImportState ]: string } = {
 450   [VideoImportState.FAILED]: 'Failed',
 451   [VideoImportState.PENDING]: 'Pending',
 452   [VideoImportState.SUCCESS]: 'Success',
 453   [VideoImportState.REJECTED]: 'Rejected',
 454   [VideoImportState.CANCELLED]: 'Cancelled',
 455   [VideoImportState.PROCESSING]: 'Processing'
 456 }
 457
 458 const ABUSE_STATES: { [ id in AbuseState ]: string } = {
 459   [AbuseState.PENDING]: 'Pending',
 460   [AbuseState.REJECTED]: 'Rejected',
 461   [AbuseState.ACCEPTED]: 'Accepted'
 462 }
 463
 464 const VIDEO_PLAYLIST_PRIVACIES: { [ id in VideoPlaylistPrivacy ]: string } = {
 465   [VideoPlaylistPrivacy.PUBLIC]: 'Public',
 466   [VideoPlaylistPrivacy.UNLISTED]: 'Unlisted',
 467   [VideoPlaylistPrivacy.PRIVATE]: 'Private'
 468 }
 469
 470 const VIDEO_PLAYLIST_TYPES: { [ id in VideoPlaylistType ]: string } = {
 471   [VideoPlaylistType.REGULAR]: 'Regular',
 472   [VideoPlaylistType.WATCH_LATER]: 'Watch later'
 473 }
 474
 475 const MIMETYPES = {
 476   AUDIO: {
 477     MIMETYPE_EXT: {
 478       'audio/mpeg': '.mp3',
 479       'audio/mp3': '.mp3',
 480       'application/ogg': '.ogg',
 481       'audio/ogg': '.ogg',
 482       'audio/x-ms-wma': '.wma',
 483       'audio/wav': '.wav',
 484       'audio/x-wav': '.wav',
 485       'audio/x-flac': '.flac',
 486       'audio/flac': '.flac',
 487       'audio/aac': '.aac',
 488       'audio/m4a': '.m4a',
 489       'audio/mp4': '.m4a',
 490       'audio/x-m4a': '.m4a',
 491       'audio/ac3': '.ac3'
 492     },
 493     EXT_MIMETYPE: null as { [ id: string ]: string }
 494   },
 495   VIDEO: {
 496     MIMETYPE_EXT: null as { [ id: string ]: string | string[] },
 497     MIMETYPES_REGEX: null as string,
 498     EXT_MIMETYPE: null as { [ id: string ]: string }
 499   },
 500   IMAGE: {
 501     MIMETYPE_EXT: {
 502       'image/png': '.png',
 503       'image/gif': '.gif',
 504       'image/webp': '.webp',
 505       'image/jpg': '.jpg',
 506       'image/jpeg': '.jpg'
 507     },
 508     EXT_MIMETYPE: null as { [ id: string ]: string }
 509   },
 510   VIDEO_CAPTIONS: {
 511     MIMETYPE_EXT: {
 512       'text/vtt': '.vtt',
 513       'application/x-subrip': '.srt',
 514       'text/plain': '.srt'
 515     }
 516   },
 517   TORRENT: {
 518     MIMETYPE_EXT: {
 519       'application/x-bittorrent': '.torrent'
 520     }
 521   }
 522 }
 523 MIMETYPES.AUDIO.EXT_MIMETYPE = invert(MIMETYPES.AUDIO.MIMETYPE_EXT)
 524 MIMETYPES.IMAGE.EXT_MIMETYPE = invert(MIMETYPES.IMAGE.MIMETYPE_EXT)
 525
 526 const BINARY_CONTENT_TYPES = new Set([
 527   'binary/octet-stream',
 528   'application/octet-stream',
 529   'application/x-binary'
 530 ])
 531
 532 // ---------------------------------------------------------------------------
 533
 534 const OVERVIEWS = {
 535   VIDEOS: {
 536     SAMPLE_THRESHOLD: 6,
 537     SAMPLES_COUNT: 20
 538   }
 539 }
 540
 541 // ---------------------------------------------------------------------------
 542
 543 const SERVER_ACTOR_NAME = 'peertube'
 544
 545 const ACTIVITY_PUB = {
 546   POTENTIAL_ACCEPT_HEADERS: [
 547     'application/activity+json',
 548     'application/ld+json',
 549     'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'
 550   ],
 551   ACCEPT_HEADER: 'application/activity+json, application/ld+json',
 552   PUBLIC: 'https://www.w3.org/ns/activitystreams#Public',
 553   COLLECTION_ITEMS_PER_PAGE: 10,
 554   FETCH_PAGE_LIMIT: 2000,
 555   URL_MIME_TYPES: {
 556     VIDEO: [] as string[],
 557     TORRENT: [ 'application/x-bittorrent' ],
 558     MAGNET: [ 'application/x-bittorrent;x-scheme-handler/magnet' ]
 559   },
 560   MAX_RECURSION_COMMENTS: 100,
 561   ACTOR_REFRESH_INTERVAL: 3600 * 24 * 1000 * 2, // 2 days
 562   VIDEO_REFRESH_INTERVAL: 3600 * 24 * 1000 * 2, // 2 days
 563   VIDEO_PLAYLIST_REFRESH_INTERVAL: 3600 * 24 * 1000 * 2 // 2 days
 564 }
 565
 566 const ACTIVITY_PUB_ACTOR_TYPES: { [ id: string ]: ActivityPubActorType } = {
 567   GROUP: 'Group',
 568   PERSON: 'Person',
 569   APPLICATION: 'Application',
 570   ORGANIZATION: 'Organization',
 571   SERVICE: 'Service'
 572 }
 573
 574 const HTTP_SIGNATURE = {
 575   HEADER_NAME: 'signature',
 576   ALGORITHM: 'rsa-sha256',
 577   HEADERS_TO_SIGN: [ '(request-target)', 'host', 'date', 'digest' ],
 578   REQUIRED_HEADERS: {
 579     ALL: [ '(request-target)', 'host', 'date' ],
 580     POST: [ '(request-target)', 'host', 'date', 'digest' ]
 581   },
 582   CLOCK_SKEW_SECONDS: 1800
 583 }
 584
 585 // ---------------------------------------------------------------------------
 586
 587 let PRIVATE_RSA_KEY_SIZE = 2048
 588
 589 // Password encryption
 590 const BCRYPT_SALT_SIZE = 10
 591
 592 const USER_PASSWORD_RESET_LIFETIME = 60000 * 60 // 60 minutes
 593 const USER_PASSWORD_CREATE_LIFETIME = 60000 * 60 * 24 * 7 // 7 days
 594
 595 const USER_EMAIL_VERIFY_LIFETIME = 60000 * 60 // 60 minutes
 596
 597 const NSFW_POLICY_TYPES: { [ id: string ]: NSFWPolicyType } = {
 598   DO_NOT_LIST: 'do_not_list',
 599   BLUR: 'blur',
 600   DISPLAY: 'display'
 601 }
 602
 603 // ---------------------------------------------------------------------------
 604
 605 // Express static paths (router)
 606 const STATIC_PATHS = {
 607   THUMBNAILS: '/static/thumbnails/',
 608   WEBSEED: '/static/webseed/',
 609   REDUNDANCY: '/static/redundancy/',
 610   STREAMING_PLAYLISTS: {
 611     HLS: '/static/streaming-playlists/hls'
 612   }
 613 }
 614 const STATIC_DOWNLOAD_PATHS = {
 615   TORRENTS: '/download/torrents/',
 616   VIDEOS: '/download/videos/',
 617   HLS_VIDEOS: '/download/streaming-playlists/hls/videos/'
 618 }
 619 const LAZY_STATIC_PATHS = {
 620   BANNERS: '/lazy-static/banners/',
 621   AVATARS: '/lazy-static/avatars/',
 622   PREVIEWS: '/lazy-static/previews/',
 623   VIDEO_CAPTIONS: '/lazy-static/video-captions/',
 624   TORRENTS: '/lazy-static/torrents/'
 625 }
 626
 627 // Cache control
 628 const STATIC_MAX_AGE = {
 629   SERVER: '2h',
 630   LAZY_SERVER: '2d',
 631   CLIENT: '30d'
 632 }
 633
 634 // Videos thumbnail size
 635 const THUMBNAILS_SIZE = {
 636   width: 280,
 637   height: 157,
 638   minWidth: 150
 639 }
 640 const PREVIEWS_SIZE = {
 641   width: 850,
 642   height: 480,
 643   minWidth: 400
 644 }
 645 const ACTOR_IMAGES_SIZE: { [key in ActorImageType]: { width: number, height: number }[]} = {
 646   [ActorImageType.AVATAR]: [
 647     {
 648       width: 120,
 649       height: 120
 650     },
 651     {
 652       width: 48,
 653       height: 48
 654     }
 655   ],
 656   [ActorImageType.BANNER]: [
 657     {
 658       width: 1920,
 659       height: 317 // 6/1 ratio
 660     }
 661   ]
 662 }
 663
 664 const EMBED_SIZE = {
 665   width: 560,
 666   height: 315
 667 }
 668
 669 // Sub folders of cache directory
 670 const FILES_CACHE = {
 671   PREVIEWS: {
 672     DIRECTORY: join(CONFIG.STORAGE.CACHE_DIR, 'previews'),
 673     MAX_AGE: 1000 * 3600 * 3 // 3 hours
 674   },
 675   VIDEO_CAPTIONS: {
 676     DIRECTORY: join(CONFIG.STORAGE.CACHE_DIR, 'video-captions'),
 677     MAX_AGE: 1000 * 3600 * 3 // 3 hours
 678   },
 679   TORRENTS: {
 680     DIRECTORY: join(CONFIG.STORAGE.CACHE_DIR, 'torrents'),
 681     MAX_AGE: 1000 * 3600 * 3 // 3 hours
 682   }
 683 }
 684
 685 const LRU_CACHE = {
 686   USER_TOKENS: {
 687     MAX_SIZE: 1000
 688   },
 689   ACTOR_IMAGE_STATIC: {
 690     MAX_SIZE: 500
 691   }
 692 }
 693
 694 const RESUMABLE_UPLOAD_DIRECTORY = join(CONFIG.STORAGE.TMP_DIR, 'resumable-uploads')
 695 const HLS_STREAMING_PLAYLIST_DIRECTORY = join(CONFIG.STORAGE.STREAMING_PLAYLISTS_DIR, 'hls')
 696 const HLS_REDUNDANCY_DIRECTORY = join(CONFIG.STORAGE.REDUNDANCY_DIR, 'hls')
 697
 698 const RESUMABLE_UPLOAD_SESSION_LIFETIME = SCHEDULER_INTERVALS_MS.REMOVE_DANGLING_RESUMABLE_UPLOADS
 699
 700 const VIDEO_LIVE = {
 701   EXTENSION: '.ts',
 702   CLEANUP_DELAY: 1000 * 60 * 5, // 5 minutes
 703   SEGMENT_TIME_SECONDS: 4, // 4 seconds
 704   SEGMENTS_LIST_SIZE: 15, // 15 maximum segments in live playlist
 705   REPLAY_DIRECTORY: 'replay',
 706   EDGE_LIVE_DELAY_SEGMENTS_NOTIFICATION: 4,
 707   MAX_SOCKET_WAITING_DATA: 1024 * 1000 * 100, // 100MB
 708   RTMP: {
 709     CHUNK_SIZE: 60000,
 710     GOP_CACHE: true,
 711     PING: 60,
 712     PING_TIMEOUT: 30,
 713     BASE_PATH: 'live'
 714   }
 715 }
 716
 717 const MEMOIZE_TTL = {
 718   OVERVIEWS_SAMPLE: 1000 * 3600 * 4, // 4 hours
 719   INFO_HASH_EXISTS: 1000 * 3600 * 12, // 12 hours
 720   LIVE_ABLE_TO_UPLOAD: 1000 * 60, // 1 minute
 721   LIVE_CHECK_SOCKET_HEALTH: 1000 * 60, // 1 minute
 722   MD_TO_PLAIN_TEXT_CLIENT_HTML: 1000 * 60 // 1 minute
 723 }
 724
 725 const MEMOIZE_LENGTH = {
 726   MD_TO_PLAIN_TEXT_CLIENT_HTML: 100,
 727   INFO_HASH_EXISTS: 200
 728 }
 729
 730 const QUEUE_CONCURRENCY = {
 731   ACTOR_PROCESS_IMAGE: 3
 732 }
 733
 734 const REDUNDANCY = {
 735   VIDEOS: {
 736     RANDOMIZED_FACTOR: 5
 737   }
 738 }
 739
 740 const ACCEPT_HEADERS = [ 'html', 'application/json' ].concat(ACTIVITY_PUB.POTENTIAL_ACCEPT_HEADERS)
 741
 742 const ASSETS_PATH = {
 743   DEFAULT_AUDIO_BACKGROUND: join(root(), 'dist', 'server', 'assets', 'default-audio-background.jpg'),
 744   DEFAULT_LIVE_BACKGROUND: join(root(), 'dist', 'server', 'assets', 'default-live-background.jpg')
 745 }
 746
 747 // ---------------------------------------------------------------------------
 748
 749 const CUSTOM_HTML_TAG_COMMENTS = {
 750   TITLE: '<!-- title tag -->',
 751   DESCRIPTION: '<!-- description tag -->',
 752   CUSTOM_CSS: '<!-- custom css tag -->',
 753   META_TAGS: '<!-- meta tags -->',
 754   SERVER_CONFIG: '<!-- server config -->'
 755 }
 756
 757 // ---------------------------------------------------------------------------
 758
 759 const FEEDS = {
 760   COUNT: 20
 761 }
 762
 763 const MAX_LOGS_OUTPUT_CHARACTERS = 10 * 1000 * 1000
 764 const LOG_FILENAME = 'peertube.log'
 765 const AUDIT_LOG_FILENAME = 'peertube-audit.log'
 766
 767 // ---------------------------------------------------------------------------
 768
 769 const TRACKER_RATE_LIMITS = {
 770   INTERVAL: 60000 * 5, // 5 minutes
 771   ANNOUNCES_PER_IP_PER_INFOHASH: 15, // maximum announces per torrent in the interval
 772   ANNOUNCES_PER_IP: 30, // maximum announces for all our torrents in the interval
 773   BLOCK_IP_LIFETIME: 60000 * 3 // 3 minutes
 774 }
 775
 776 const P2P_MEDIA_LOADER_PEER_VERSION = 2
 777
 778 // ---------------------------------------------------------------------------
 779
 780 const PLUGIN_GLOBAL_CSS_FILE_NAME = 'plugins-global.css'
 781 const PLUGIN_GLOBAL_CSS_PATH = join(CONFIG.STORAGE.TMP_DIR, PLUGIN_GLOBAL_CSS_FILE_NAME)
 782
 783 let PLUGIN_EXTERNAL_AUTH_TOKEN_LIFETIME = 1000 * 60 * 5 // 5 minutes
 784
 785 const DEFAULT_THEME_NAME = 'default'
 786 const DEFAULT_USER_THEME_NAME = 'instance-default'
 787
 788 // ---------------------------------------------------------------------------
 789
 790 const SEARCH_INDEX = {
 791   ROUTES: {
 792     VIDEOS: '/api/v1/search/videos',
 793     VIDEO_CHANNELS: '/api/v1/search/video-channels'
 794   }
 795 }
 796
 797 // ---------------------------------------------------------------------------
 798
 799 // Special constants for a test instance
 800 if (isTestInstance() === true) {
 801   PRIVATE_RSA_KEY_SIZE = 1024
 802
 803   ACTOR_FOLLOW_SCORE.BASE = 20
 804
 805   REMOTE_SCHEME.HTTP = 'http'
 806   REMOTE_SCHEME.WS = 'ws'
 807
 808   STATIC_MAX_AGE.SERVER = '0'
 809
 810   ACTIVITY_PUB.COLLECTION_ITEMS_PER_PAGE = 2
 811   ACTIVITY_PUB.ACTOR_REFRESH_INTERVAL = 10 * 1000 // 10 seconds
 812   ACTIVITY_PUB.VIDEO_REFRESH_INTERVAL = 10 * 1000 // 10 seconds
 813   ACTIVITY_PUB.VIDEO_PLAYLIST_REFRESH_INTERVAL = 10 * 1000 // 10 seconds
 814
 815   CONSTRAINTS_FIELDS.ACTORS.IMAGE.FILE_SIZE.max = 100 * 1024 // 100KB
 816   CONSTRAINTS_FIELDS.VIDEOS.IMAGE.FILE_SIZE.max = 400 * 1024 // 400KB
 817
 818   SCHEDULER_INTERVALS_MS.ACTOR_FOLLOW_SCORES = 1000
 819   SCHEDULER_INTERVALS_MS.REMOVE_OLD_JOBS = 10000
 820   SCHEDULER_INTERVALS_MS.REMOVE_OLD_HISTORY = 5000
 821   SCHEDULER_INTERVALS_MS.REMOVE_OLD_VIEWS = 5000
 822   SCHEDULER_INTERVALS_MS.UPDATE_VIDEOS = 5000
 823   SCHEDULER_INTERVALS_MS.AUTO_FOLLOW_INDEX_INSTANCES = 5000
 824   SCHEDULER_INTERVALS_MS.UPDATE_INBOX_STATS = 5000
 825   SCHEDULER_INTERVALS_MS.CHECK_PEERTUBE_VERSION = 2000
 826
 827   REPEAT_JOBS['videos-views-stats'] = { every: 5000 }
 828
 829   REPEAT_JOBS['activitypub-cleaner'] = { every: 5000 }
 830   AP_CLEANER.PERIOD = 5000
 831
 832   REDUNDANCY.VIDEOS.RANDOMIZED_FACTOR = 1
 833
 834   VIEW_LIFETIME.VIEWER = 1000 * 5 // 5 second
 835   CONTACT_FORM_LIFETIME = 1000 // 1 second
 836
 837   JOB_ATTEMPTS['email'] = 1
 838
 839   FILES_CACHE.VIDEO_CAPTIONS.MAX_AGE = 3000
 840   MEMOIZE_TTL.OVERVIEWS_SAMPLE = 3000
 841   MEMOIZE_TTL.LIVE_ABLE_TO_UPLOAD = 3000
 842   OVERVIEWS.VIDEOS.SAMPLE_THRESHOLD = 2
 843
 844   PLUGIN_EXTERNAL_AUTH_TOKEN_LIFETIME = 5000
 845
 846   VIDEO_LIVE.CLEANUP_DELAY = 5000
 847   VIDEO_LIVE.SEGMENT_TIME_SECONDS = 2
 848   VIDEO_LIVE.EDGE_LIVE_DELAY_SEGMENTS_NOTIFICATION = 1
 849 }
 850
 851 updateWebserverUrls()
 852 updateWebserverConfig()
 853
 854 registerConfigChangedHandler(() => {
 855   updateWebserverUrls()
 856   updateWebserverConfig()
 857 })
 858
 859 // ---------------------------------------------------------------------------
 860
 861 const FILES_CONTENT_HASH = {
 862   MANIFEST: generateContentHash(),
 863   FAVICON: generateContentHash(),
 864   LOGO: generateContentHash()
 865 }
 866
 867 // ---------------------------------------------------------------------------
 868
 869 const VIDEO_FILTERS = {
 870   WATERMARK: {
 871     SIZE_RATIO: 1 / 10,
 872     HORIZONTAL_MARGIN_RATIO: 1 / 20,
 873     VERTICAL_MARGIN_RATIO: 1 / 20
 874   }
 875 }
 876
 877 // ---------------------------------------------------------------------------
 878
 879 export {
 880   WEBSERVER,
 881   API_VERSION,
 882   VIDEO_LIVE,
 883   PEERTUBE_VERSION,
 884   LAZY_STATIC_PATHS,
 885   SEARCH_INDEX,
 886   RESUMABLE_UPLOAD_DIRECTORY,
 887   RESUMABLE_UPLOAD_SESSION_LIFETIME,
 888   HLS_REDUNDANCY_DIRECTORY,
 889   P2P_MEDIA_LOADER_PEER_VERSION,
 890   ACTOR_IMAGES_SIZE,
 891   ACCEPT_HEADERS,
 892   BCRYPT_SALT_SIZE,
 893   TRACKER_RATE_LIMITS,
 894   FILES_CACHE,
 895   LOG_FILENAME,
 896   CONSTRAINTS_FIELDS,
 897   EMBED_SIZE,
 898   REDUNDANCY,
 899   JOB_CONCURRENCY,
 900   JOB_ATTEMPTS,
 901   AP_CLEANER,
 902   LAST_MIGRATION_VERSION,
 903   OAUTH_LIFETIME,
 904   CUSTOM_HTML_TAG_COMMENTS,
 905   BROADCAST_CONCURRENCY,
 906   AUDIT_LOG_FILENAME,
 907   PAGINATION,
 908   ACTOR_FOLLOW_SCORE,
 909   PREVIEWS_SIZE,
 910   REMOTE_SCHEME,
 911   FOLLOW_STATES,
 912   DEFAULT_USER_THEME_NAME,
 913   SERVER_ACTOR_NAME,
 914   PLUGIN_GLOBAL_CSS_FILE_NAME,
 915   PLUGIN_GLOBAL_CSS_PATH,
 916   PRIVATE_RSA_KEY_SIZE,
 917   VIDEO_FILTERS,
 918   ROUTE_CACHE_LIFETIME,
 919   SORTABLE_COLUMNS,
 920   HLS_STREAMING_PLAYLIST_DIRECTORY,
 921   FEEDS,
 922   JOB_TTL,
 923   DEFAULT_THEME_NAME,
 924   NSFW_POLICY_TYPES,
 925   STATIC_MAX_AGE,
 926   STATIC_PATHS,
 927   VIDEO_IMPORT_TIMEOUT,
 928   VIDEO_PLAYLIST_TYPES,
 929   MAX_LOGS_OUTPUT_CHARACTERS,
 930   ACTIVITY_PUB,
 931   ACTIVITY_PUB_ACTOR_TYPES,
 932   THUMBNAILS_SIZE,
 933   VIDEO_CATEGORIES,
 934   MEMOIZE_LENGTH,
 935   VIDEO_LANGUAGES,
 936   VIDEO_PRIVACIES,
 937   VIDEO_LICENCES,
 938   VIDEO_STATES,
 939   QUEUE_CONCURRENCY,
 940   VIDEO_RATE_TYPES,
 941   JOB_PRIORITY,
 942   VIDEO_TRANSCODING_FPS,
 943   FFMPEG_NICE,
 944   ABUSE_STATES,
 945   LRU_CACHE,
 946   REQUEST_TIMEOUTS,
 947   USER_PASSWORD_RESET_LIFETIME,
 948   USER_PASSWORD_CREATE_LIFETIME,
 949   MEMOIZE_TTL,
 950   USER_EMAIL_VERIFY_LIFETIME,
 951   OVERVIEWS,
 952   SCHEDULER_INTERVALS_MS,
 953   REPEAT_JOBS,
 954   STATIC_DOWNLOAD_PATHS,
 955   MIMETYPES,
 956   CRAWL_REQUEST_CONCURRENCY,
 957   DEFAULT_AUDIO_RESOLUTION,
 958   BINARY_CONTENT_TYPES,
 959   JOB_COMPLETED_LIFETIME,
 960   HTTP_SIGNATURE,
 961   VIDEO_IMPORT_STATES,
 962   VIEW_LIFETIME,
 963   CONTACT_FORM_LIFETIME,
 964   VIDEO_PLAYLIST_PRIVACIES,
 965   PLUGIN_EXTERNAL_AUTH_TOKEN_LIFETIME,
 966   ASSETS_PATH,
 967   FILES_CONTENT_HASH,
 968   loadLanguages,
 969   buildLanguages,
 970   generateContentHash
 971 }
 972
 973 // ---------------------------------------------------------------------------
 974
 975 function buildVideoMimetypeExt () {
 976   const data = {
 977     // streamable formats that warrant cross-browser compatibility
 978     'video/webm': '.webm',
 979     // We'll add .ogg if additional extensions are enabled
 980     // We could add .ogg here but since it could be an audio file,
 981     // it would be confusing for users because PeerTube will refuse their file (based on the mimetype)
 982     'video/ogg': [ '.ogv' ],
 983     'video/mp4': '.mp4'
 984   }
 985
 986   if (CONFIG.TRANSCODING.ENABLED) {
 987     if (CONFIG.TRANSCODING.ALLOW_ADDITIONAL_EXTENSIONS) {
 988       data['video/ogg'].push('.ogg')
 989
 990       Object.assign(data, {
 991         'video/x-matroska': '.mkv',
 992
 993         // Developed by Apple
 994         'video/quicktime': [ '.mov', '.qt', '.mqv' ], // often used as output format by editing software
 995         'video/x-m4v': '.m4v',
 996         'video/m4v': '.m4v',
 997
 998         // Developed by the Adobe Flash Platform
 999         'video/x-flv': '.flv',
1000         'video/x-f4v': '.f4v', // replacement for flv
1001
1002         // Developed by Microsoft
1003         'video/x-ms-wmv': '.wmv',
1004         'video/x-msvideo': '.avi',
1005         'video/avi': '.avi',
1006
1007         // Developed by 3GPP
1008         // common video formats for cell phones
1009         'video/3gpp': [ '.3gp', '.3gpp' ],
1010         'video/3gpp2': [ '.3g2', '.3gpp2' ],
1011
1012         // Developed by FFmpeg/Mplayer
1013         'application/x-nut': '.nut',
1014
1015         // The standard video format used by many Sony and Panasonic HD camcorders.
1016         // It is also used for storing high definition video on Blu-ray discs.
1017         'video/mp2t': '.mts',
1018         'video/m2ts': '.m2ts',
1019
1020         // Old formats reliant on MPEG-1/MPEG-2
1021         'video/mpv': '.mpv',
1022         'video/mpeg2': '.m2v',
1023         'video/mpeg': [ '.m1v', '.mpg', '.mpe', '.mpeg', '.vob' ],
1024         'video/dvd': '.vob',
1025
1026         // Could be anything
1027         'application/octet-stream': null,
1028         'application/mxf': '.mxf' // often used as exchange format by editing software
1029       })
1030     }
1031
1032     if (CONFIG.TRANSCODING.ALLOW_AUDIO_FILES) {
1033       Object.assign(data, MIMETYPES.AUDIO.MIMETYPE_EXT)
1034     }
1035   }
1036
1037   return data
1038 }
1039
1040 function updateWebserverUrls () {
1041   WEBSERVER.URL = sanitizeUrl(CONFIG.WEBSERVER.SCHEME + '://' + CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.WEBSERVER.PORT)
1042   WEBSERVER.HOST = sanitizeHost(CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.WEBSERVER.PORT, REMOTE_SCHEME.HTTP)
1043   WEBSERVER.WS = CONFIG.WEBSERVER.WS
1044
1045   WEBSERVER.SCHEME = CONFIG.WEBSERVER.SCHEME
1046   WEBSERVER.HOSTNAME = CONFIG.WEBSERVER.HOSTNAME
1047   WEBSERVER.PORT = CONFIG.WEBSERVER.PORT
1048
1049   WEBSERVER.RTMP_URL = 'rtmp://' + CONFIG.LIVE.RTMP.HOSTNAME + ':' + CONFIG.LIVE.RTMP.PORT + '/' + VIDEO_LIVE.RTMP.BASE_PATH
1050   WEBSERVER.RTMPS_URL = 'rtmps://' + CONFIG.LIVE.RTMPS.HOSTNAME + ':' + CONFIG.LIVE.RTMPS.PORT + '/' + VIDEO_LIVE.RTMP.BASE_PATH
1051 }
1052
1053 function updateWebserverConfig () {
1054   MIMETYPES.VIDEO.MIMETYPE_EXT = buildVideoMimetypeExt()
1055   MIMETYPES.VIDEO.MIMETYPES_REGEX = buildMimetypesRegex(MIMETYPES.VIDEO.MIMETYPE_EXT)
1056
1057   ACTIVITY_PUB.URL_MIME_TYPES.VIDEO = Object.keys(MIMETYPES.VIDEO.MIMETYPE_EXT)
1058
1059   MIMETYPES.VIDEO.EXT_MIMETYPE = buildVideoExtMimetype(MIMETYPES.VIDEO.MIMETYPE_EXT)
1060
1061   CONSTRAINTS_FIELDS.VIDEOS.EXTNAME = Object.keys(MIMETYPES.VIDEO.EXT_MIMETYPE)
1062 }
1063
1064 function buildVideoExtMimetype (obj: { [ id: string ]: string | string[] }) {
1065   const result: { [id: string]: string } = {}
1066
1067   for (const mimetype of Object.keys(obj)) {
1068     const value = obj[mimetype]
1069     if (!value) continue
1070
1071     const extensions = Array.isArray(value) ? value : [ value ]
1072
1073     for (const extension of extensions) {
1074       result[extension] = mimetype
1075     }
1076   }
1077
1078   return result
1079 }
1080
1081 function buildMimetypesRegex (obj: { [id: string]: string | string[] }) {
1082   return Object.keys(obj)
1083     .map(m => `(${m})`)
1084     .join('|')
1085 }
1086
1087 function loadLanguages () {
1088   Object.assign(VIDEO_LANGUAGES, buildLanguages())
1089 }
1090
1091 function buildLanguages () {
1092   const iso639 = require('iso-639-3')
1093
1094   const languages: { [id: string]: string } = {}
1095
1096   const additionalLanguages = {
1097     sgn: true, // Sign languages (macro language)
1098     ase: true, // American sign language
1099     sdl: true, // Arabian sign language
1100     bfi: true, // British sign language
1101     bzs: true, // Brazilian sign language
1102     csl: true, // Chinese sign language
1103     cse: true, // Czech sign language
1104     dsl: true, // Danish sign language
1105     fsl: true, // French sign language
1106     gsg: true, // German sign language
1107     pks: true, // Pakistan sign language
1108     jsl: true, // Japanese sign language
1109     sfs: true, // South African sign language
1110     swl: true, // Swedish sign language
1111     rsl: true, // Russian sign language
1112
1113     kab: true, // Kabyle
1114
1115     lat: true, // Latin
1116
1117     epo: true, // Esperanto
1118     tlh: true, // Klingon
1119     jbo: true, // Lojban
1120     avk: true, // Kotava
1121
1122     zxx: true // No linguistic content (ISO-639-2)
1123   }
1124
1125   // Only add ISO639-1 languages and some sign languages (ISO639-3)
1126   iso639
1127     .filter(l => {
1128       return (l.iso6391 !== undefined && l.type === 'living') ||
1129         additionalLanguages[l.iso6393] === true
1130     })
1131     .forEach(l => { languages[l.iso6391 || l.iso6393] = l.name })
1132
1133   // Override Occitan label
1134   languages['oc'] = 'Occitan'
1135   languages['el'] = 'Greek'
1136
1137   // Chinese languages
1138   languages['zh-Hans'] = 'Simplified Chinese'
1139   languages['zh-Hant'] = 'Traditional Chinese'
1140
1141   return languages
1142 }
1143
1144 function generateContentHash () {
1145   return randomBytes(20).toString('hex')
1146 }