server/initializers/constants.ts

   1 import { IConfig } from 'config'
   2 import { dirname, join } from 'path'
   3 import { JobType, VideoRateType, VideoState } from '../../shared/models'
   4 import { ActivityPubActorType } from '../../shared/models/activitypub'
   5 import { FollowState } from '../../shared/models/actors'
   6 import { VideoPrivacy } from '../../shared/models/videos'
   7 // Do not use barrels, remain constants as independent as possible
   8 import { buildPath, isTestInstance, root, sanitizeHost, sanitizeUrl } from '../helpers/core-utils'
   9 import { NSFWPolicyType } from '../../shared/models/videos/nsfw-policy.type'
  10 import { invert } from 'lodash'
  11
  12 // Use a variable to reload the configuration if we need
  13 let config: IConfig = require('config')
  14
  15 // ---------------------------------------------------------------------------
  16
  17 const LAST_MIGRATION_VERSION = 235
  18
  19 // ---------------------------------------------------------------------------
  20
  21 // API version
  22 const API_VERSION = 'v1'
  23
  24 // Number of results by default for the pagination
  25 const PAGINATION_COUNT_DEFAULT = 15
  26
  27 // Sortable columns per schema
  28 const SORTABLE_COLUMNS = {
  29   USERS: [ 'id', 'username', 'createdAt' ],
  30   ACCOUNTS: [ 'createdAt' ],
  31   JOBS: [ 'createdAt' ],
  32   VIDEO_ABUSES: [ 'id', 'createdAt' ],
  33   VIDEO_CHANNELS: [ 'id', 'name', 'updatedAt', 'createdAt' ],
  34   VIDEOS: [ 'name', 'duration', 'createdAt', 'publishedAt', 'views', 'likes' ],
  35   VIDEO_COMMENT_THREADS: [ 'createdAt' ],
  36   BLACKLISTS: [ 'id', 'name', 'duration', 'views', 'likes', 'dislikes', 'uuid', 'createdAt' ],
  37   FOLLOWERS: [ 'createdAt' ],
  38   FOLLOWING: [ 'createdAt' ],
  39
  40   VIDEOS_SEARCH: [ 'match', 'name', 'duration', 'createdAt', 'publishedAt', 'views', 'likes' ]
  41 }
  42
  43 const OAUTH_LIFETIME = {
  44   ACCESS_TOKEN: 3600 * 24, // 1 day, for upload
  45   REFRESH_TOKEN: 1209600 // 2 weeks
  46 }
  47
  48 const ROUTE_CACHE_LIFETIME = {
  49   FEEDS: '15 minutes',
  50   ROBOTS: '2 hours',
  51   NODEINFO: '10 minutes',
  52   ACTIVITY_PUB: {
  53     VIDEOS: '1 second' // 1 second, cache concurrent requests after a broadcast for example
  54   }
  55 }
  56
  57 // ---------------------------------------------------------------------------
  58
  59 // Number of points we add/remove after a successful/bad request
  60 const ACTOR_FOLLOW_SCORE = {
  61   PENALTY: -10,
  62   BONUS: 10,
  63   BASE: 1000,
  64   MAX: 10000
  65 }
  66
  67 const FOLLOW_STATES: { [ id: string ]: FollowState } = {
  68   PENDING: 'pending',
  69   ACCEPTED: 'accepted'
  70 }
  71
  72 const REMOTE_SCHEME = {
  73   HTTP: 'https',
  74   WS: 'wss'
  75 }
  76
  77 const JOB_ATTEMPTS: { [ id in JobType ]: number } = {
  78   'activitypub-http-broadcast': 5,
  79   'activitypub-http-unicast': 5,
  80   'activitypub-http-fetcher': 5,
  81   'activitypub-follow': 5,
  82   'video-file-import': 1,
  83   'video-file': 1,
  84   'email': 5
  85 }
  86 const JOB_CONCURRENCY: { [ id in JobType ]: number } = {
  87   'activitypub-http-broadcast': 1,
  88   'activitypub-http-unicast': 5,
  89   'activitypub-http-fetcher': 1,
  90   'activitypub-follow': 3,
  91   'video-file-import': 1,
  92   'video-file': 1,
  93   'email': 5
  94 }
  95 const BROADCAST_CONCURRENCY = 10 // How many requests in parallel we do in activitypub-http-broadcast job
  96 const JOB_REQUEST_TIMEOUT = 3000 // 3 seconds
  97 const JOB_REQUEST_TTL = 60000 * 10 // 10 minutes
  98 const JOB_COMPLETED_LIFETIME = 60000 * 60 * 24 * 2 // 2 days
  99
 100 // 1 hour
 101 let SCHEDULER_INTERVALS_MS = {
 102   badActorFollow: 60000 * 60, // 1 hour
 103   removeOldJobs: 60000 * 60, // 1 hour
 104   updateVideos: 60000 // 1 minute
 105 }
 106
 107 // ---------------------------------------------------------------------------
 108
 109 const CONFIG = {
 110   CUSTOM_FILE: getLocalConfigFilePath(),
 111   LISTEN: {
 112     PORT: config.get<number>('listen.port'),
 113     HOSTNAME: config.get<string>('listen.hostname')
 114   },
 115   DATABASE: {
 116     DBNAME: 'peertube' + config.get<string>('database.suffix'),
 117     HOSTNAME: config.get<string>('database.hostname'),
 118     PORT: config.get<number>('database.port'),
 119     USERNAME: config.get<string>('database.username'),
 120     PASSWORD: config.get<string>('database.password')
 121   },
 122   REDIS: {
 123     HOSTNAME: config.has('redis.hostname') ? config.get<string>('redis.hostname') : null,
 124     PORT: config.has('redis.port') ? config.get<number>('redis.port') : null,
 125     SOCKET: config.has('redis.socket') ? config.get<string>('redis.socket') : null,
 126     AUTH: config.has('redis.auth') ? config.get<string>('redis.auth') : null,
 127     DB: config.has('redis.db') ? config.get<number>('redis.db') : null
 128   },
 129   SMTP: {
 130     HOSTNAME: config.get<string>('smtp.hostname'),
 131     PORT: config.get<number>('smtp.port'),
 132     USERNAME: config.get<string>('smtp.username'),
 133     PASSWORD: config.get<string>('smtp.password'),
 134     TLS: config.get<boolean>('smtp.tls'),
 135     DISABLE_STARTTLS: config.get<boolean>('smtp.disable_starttls'),
 136     CA_FILE: config.get<string>('smtp.ca_file'),
 137     FROM_ADDRESS: config.get<string>('smtp.from_address')
 138   },
 139   STORAGE: {
 140     AVATARS_DIR: buildPath(config.get<string>('storage.avatars')),
 141     LOG_DIR: buildPath(config.get<string>('storage.logs')),
 142     VIDEOS_DIR: buildPath(config.get<string>('storage.videos')),
 143     THUMBNAILS_DIR: buildPath(config.get<string>('storage.thumbnails')),
 144     PREVIEWS_DIR: buildPath(config.get<string>('storage.previews')),
 145     CAPTIONS_DIR: buildPath(config.get<string>('storage.captions')),
 146     TORRENTS_DIR: buildPath(config.get<string>('storage.torrents')),
 147     CACHE_DIR: buildPath(config.get<string>('storage.cache'))
 148   },
 149   WEBSERVER: {
 150     SCHEME: config.get<boolean>('webserver.https') === true ? 'https' : 'http',
 151     WS: config.get<boolean>('webserver.https') === true ? 'wss' : 'ws',
 152     HOSTNAME: config.get<string>('webserver.hostname'),
 153     PORT: config.get<number>('webserver.port'),
 154     URL: '',
 155     HOST: ''
 156   },
 157   TRUST_PROXY: config.get<string[]>('trust_proxy'),
 158   LOG: {
 159     LEVEL: config.get<string>('log.level')
 160   },
 161   ADMIN: {
 162     get EMAIL () { return config.get<string>('admin.email') }
 163   },
 164   SIGNUP: {
 165     get ENABLED () { return config.get<boolean>('signup.enabled') },
 166     get LIMIT () { return config.get<number>('signup.limit') },
 167     FILTERS: {
 168       CIDR: {
 169         get WHITELIST () { return config.get<string[]>('signup.filters.cidr.whitelist') },
 170         get BLACKLIST () { return config.get<string[]>('signup.filters.cidr.blacklist') }
 171       }
 172     }
 173   },
 174   USER: {
 175     get VIDEO_QUOTA () { return config.get<number>('user.video_quota') }
 176   },
 177   TRANSCODING: {
 178     get ENABLED () { return config.get<boolean>('transcoding.enabled') },
 179     get THREADS () { return config.get<number>('transcoding.threads') },
 180     RESOLUTIONS: {
 181       get '240p' () { return config.get<boolean>('transcoding.resolutions.240p') },
 182       get '360p' () { return config.get<boolean>('transcoding.resolutions.360p') },
 183       get '480p' () { return config.get<boolean>('transcoding.resolutions.480p') },
 184       get '720p' () { return config.get<boolean>('transcoding.resolutions.720p') },
 185       get '1080p' () { return config.get<boolean>('transcoding.resolutions.1080p') }
 186     }
 187   },
 188   CACHE: {
 189     PREVIEWS: {
 190       get SIZE () { return config.get<number>('cache.previews.size') }
 191     },
 192     VIDEO_CAPTIONS: {
 193       get SIZE () { return config.get<number>('cache.captions.size') }
 194     }
 195   },
 196   INSTANCE: {
 197     get NAME () { return config.get<string>('instance.name') },
 198     get SHORT_DESCRIPTION () { return config.get<string>('instance.short_description') },
 199     get DESCRIPTION () { return config.get<string>('instance.description') },
 200     get TERMS () { return config.get<string>('instance.terms') },
 201     get DEFAULT_CLIENT_ROUTE () { return config.get<string>('instance.default_client_route') },
 202     get DEFAULT_NSFW_POLICY () { return config.get<NSFWPolicyType>('instance.default_nsfw_policy') },
 203     CUSTOMIZATIONS: {
 204       get JAVASCRIPT () { return config.get<string>('instance.customizations.javascript') },
 205       get CSS () { return config.get<string>('instance.customizations.css') }
 206     },
 207     get ROBOTS () { return config.get<string>('instance.robots') }
 208   },
 209   SERVICES: {
 210     TWITTER: {
 211       get USERNAME () { return config.get<string>('services.twitter.username') },
 212       get WHITELISTED () { return config.get<boolean>('services.twitter.whitelisted') }
 213     }
 214   }
 215 }
 216
 217 // ---------------------------------------------------------------------------
 218
 219 const CONSTRAINTS_FIELDS = {
 220   USERS: {
 221     NAME: { min: 3, max: 120 }, // Length
 222     DESCRIPTION: { min: 3, max: 250 }, // Length
 223     USERNAME: { min: 3, max: 20 }, // Length
 224     PASSWORD: { min: 6, max: 255 }, // Length
 225     VIDEO_QUOTA: { min: -1 }
 226   },
 227   VIDEO_ABUSES: {
 228     REASON: { min: 2, max: 300 } // Length
 229   },
 230   VIDEO_CHANNELS: {
 231     NAME: { min: 3, max: 120 }, // Length
 232     DESCRIPTION: { min: 3, max: 500 }, // Length
 233     SUPPORT: { min: 3, max: 500 }, // Length
 234     URL: { min: 3, max: 2000 } // Length
 235   },
 236   VIDEO_CAPTIONS: {
 237     CAPTION_FILE: {
 238       EXTNAME: [ '.vtt', '.srt' ],
 239       FILE_SIZE: {
 240         max: 2 * 1024 * 1024 // 2MB
 241       }
 242     }
 243   },
 244   VIDEOS: {
 245     NAME: { min: 3, max: 120 }, // Length
 246     LANGUAGE: { min: 1, max: 10 }, // Length
 247     TRUNCATED_DESCRIPTION: { min: 3, max: 250 }, // Length
 248     DESCRIPTION: { min: 3, max: 10000 }, // Length
 249     SUPPORT: { min: 3, max: 500 }, // Length
 250     IMAGE: {
 251       EXTNAME: [ '.jpg', '.jpeg' ],
 252       FILE_SIZE: {
 253         max: 2 * 1024 * 1024 // 2MB
 254       }
 255     },
 256     EXTNAME: [ '.mp4', '.ogv', '.webm' ],
 257     INFO_HASH: { min: 40, max: 40 }, // Length, info hash is 20 bytes length but we represent it in hexadecimal so 20 * 2
 258     DURATION: { min: 1 }, // Number
 259     TAGS: { min: 0, max: 5 }, // Number of total tags
 260     TAG: { min: 2, max: 30 }, // Length
 261     THUMBNAIL: { min: 2, max: 30 },
 262     THUMBNAIL_DATA: { min: 0, max: 20000 }, // Bytes
 263     VIEWS: { min: 0 },
 264     LIKES: { min: 0 },
 265     DISLIKES: { min: 0 },
 266     FILE_SIZE: { min: 10 },
 267     URL: { min: 3, max: 2000 } // Length
 268   },
 269   ACTORS: {
 270     PUBLIC_KEY: { min: 10, max: 5000 }, // Length
 271     PRIVATE_KEY: { min: 10, max: 5000 }, // Length
 272     URL: { min: 3, max: 2000 }, // Length
 273     AVATAR: {
 274       EXTNAME: [ '.png', '.jpeg', '.jpg' ],
 275       FILE_SIZE: {
 276         max: 2 * 1024 * 1024 // 2MB
 277       }
 278     }
 279   },
 280   VIDEO_EVENTS: {
 281     COUNT: { min: 0 }
 282   },
 283   VIDEO_COMMENTS: {
 284     TEXT: { min: 1, max: 3000 }, // Length
 285     URL: { min: 3, max: 2000 } // Length
 286   },
 287   VIDEO_SHARE: {
 288     URL: { min: 3, max: 2000 } // Length
 289   }
 290 }
 291
 292 const RATES_LIMIT = {
 293   LOGIN: {
 294     WINDOW_MS: 5 * 60 * 1000, // 5 minutes
 295     MAX: 15 // 15 attempts
 296   }
 297 }
 298
 299 let VIDEO_VIEW_LIFETIME = 60000 * 60 // 1 hour
 300 const VIDEO_TRANSCODING_FPS = {
 301   MIN: 10,
 302   AVERAGE: 30,
 303   MAX: 60,
 304   KEEP_ORIGIN_FPS_RESOLUTION_MIN: 720 // We keep the original FPS on high resolutions (720 minimum)
 305 }
 306
 307 const VIDEO_RATE_TYPES: { [ id: string ]: VideoRateType } = {
 308   LIKE: 'like',
 309   DISLIKE: 'dislike'
 310 }
 311
 312 const VIDEO_CATEGORIES = {
 313   1: 'Music',
 314   2: 'Films',
 315   3: 'Vehicles',
 316   4: 'Art',
 317   5: 'Sports',
 318   6: 'Travels',
 319   7: 'Gaming',
 320   8: 'People',
 321   9: 'Comedy',
 322   10: 'Entertainment',
 323   11: 'News',
 324   12: 'How To',
 325   13: 'Education',
 326   14: 'Activism',
 327   15: 'Science & Technology',
 328   16: 'Animals',
 329   17: 'Kids',
 330   18: 'Food'
 331 }
 332
 333 // See https://creativecommons.org/licenses/?lang=en
 334 const VIDEO_LICENCES = {
 335   1: 'Attribution',
 336   2: 'Attribution - Share Alike',
 337   3: 'Attribution - No Derivatives',
 338   4: 'Attribution - Non Commercial',
 339   5: 'Attribution - Non Commercial - Share Alike',
 340   6: 'Attribution - Non Commercial - No Derivatives',
 341   7: 'Public Domain Dedication'
 342 }
 343
 344 const VIDEO_LANGUAGES = buildLanguages()
 345
 346 const VIDEO_PRIVACIES = {
 347   [VideoPrivacy.PUBLIC]: 'Public',
 348   [VideoPrivacy.UNLISTED]: 'Unlisted',
 349   [VideoPrivacy.PRIVATE]: 'Private'
 350 }
 351
 352 const VIDEO_STATES = {
 353   [VideoState.PUBLISHED]: 'Published',
 354   [VideoState.TO_TRANSCODE]: 'To transcode'
 355 }
 356
 357 const VIDEO_MIMETYPE_EXT = {
 358   'video/webm': '.webm',
 359   'video/ogg': '.ogv',
 360   'video/mp4': '.mp4'
 361 }
 362 const VIDEO_EXT_MIMETYPE = invert(VIDEO_MIMETYPE_EXT)
 363
 364 const IMAGE_MIMETYPE_EXT = {
 365   'image/png': '.png',
 366   'image/jpg': '.jpg',
 367   'image/jpeg': '.jpg'
 368 }
 369
 370 const VIDEO_CAPTIONS_MIMETYPE_EXT = {
 371   'text/vtt': '.vtt',
 372   'application/x-subrip': '.srt'
 373 }
 374
 375 // ---------------------------------------------------------------------------
 376
 377 const SERVER_ACTOR_NAME = 'peertube'
 378
 379 const ACTIVITY_PUB = {
 380   POTENTIAL_ACCEPT_HEADERS: [
 381     'application/activity+json',
 382     'application/ld+json',
 383     'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'
 384   ],
 385   ACCEPT_HEADER: 'application/activity+json, application/ld+json',
 386   PUBLIC: 'https://www.w3.org/ns/activitystreams#Public',
 387   COLLECTION_ITEMS_PER_PAGE: 10,
 388   FETCH_PAGE_LIMIT: 100,
 389   URL_MIME_TYPES: {
 390     VIDEO: Object.keys(VIDEO_MIMETYPE_EXT),
 391     TORRENT: [ 'application/x-bittorrent' ],
 392     MAGNET: [ 'application/x-bittorrent;x-scheme-handler/magnet' ]
 393   },
 394   MAX_RECURSION_COMMENTS: 100,
 395   ACTOR_REFRESH_INTERVAL: 3600 * 24 * 1000 // 1 day
 396 }
 397
 398 const ACTIVITY_PUB_ACTOR_TYPES: { [ id: string ]: ActivityPubActorType } = {
 399   GROUP: 'Group',
 400   PERSON: 'Person',
 401   APPLICATION: 'Application'
 402 }
 403
 404 // ---------------------------------------------------------------------------
 405
 406 const PRIVATE_RSA_KEY_SIZE = 2048
 407
 408 // Password encryption
 409 const BCRYPT_SALT_SIZE = 10
 410
 411 const USER_PASSWORD_RESET_LIFETIME = 60000 * 5 // 5 minutes
 412
 413 const NSFW_POLICY_TYPES: { [ id: string]: NSFWPolicyType } = {
 414   DO_NOT_LIST: 'do_not_list',
 415   BLUR: 'blur',
 416   DISPLAY: 'display'
 417 }
 418
 419 // ---------------------------------------------------------------------------
 420
 421 // Express static paths (router)
 422 const STATIC_PATHS = {
 423   PREVIEWS: '/static/previews/',
 424   THUMBNAILS: '/static/thumbnails/',
 425   TORRENTS: '/static/torrents/',
 426   WEBSEED: '/static/webseed/',
 427   AVATARS: '/static/avatars/',
 428   VIDEO_CAPTIONS: '/static/video-captions/'
 429 }
 430 const STATIC_DOWNLOAD_PATHS = {
 431   TORRENTS: '/download/torrents/',
 432   VIDEOS: '/download/videos/'
 433 }
 434
 435 // Cache control
 436 let STATIC_MAX_AGE = '2h'
 437
 438 // Videos thumbnail size
 439 const THUMBNAILS_SIZE = {
 440   width: 200,
 441   height: 110
 442 }
 443 const PREVIEWS_SIZE = {
 444   width: 560,
 445   height: 315
 446 }
 447 const AVATARS_SIZE = {
 448   width: 120,
 449   height: 120
 450 }
 451
 452 const EMBED_SIZE = {
 453   width: 560,
 454   height: 315
 455 }
 456
 457 // Sub folders of cache directory
 458 const CACHE = {
 459   PREVIEWS: {
 460     DIRECTORY: join(CONFIG.STORAGE.CACHE_DIR, 'previews'),
 461     MAX_AGE: 1000 * 3600 * 3 // 3 hours
 462   },
 463   VIDEO_CAPTIONS: {
 464     DIRECTORY: join(CONFIG.STORAGE.CACHE_DIR, 'video-captions'),
 465     MAX_AGE: 1000 * 3600 * 3 // 3 hours
 466   }
 467 }
 468
 469 const ACCEPT_HEADERS = [ 'html', 'application/json' ].concat(ACTIVITY_PUB.POTENTIAL_ACCEPT_HEADERS)
 470
 471 // ---------------------------------------------------------------------------
 472
 473 const CUSTOM_HTML_TAG_COMMENTS = {
 474   TITLE: '<!-- title tag -->',
 475   DESCRIPTION: '<!-- description tag -->',
 476   CUSTOM_CSS: '<!-- custom css tag -->',
 477   OPENGRAPH_AND_OEMBED: '<!-- open graph and oembed tags -->'
 478 }
 479
 480 // ---------------------------------------------------------------------------
 481
 482 const FEEDS = {
 483   COUNT: 20
 484 }
 485
 486 // ---------------------------------------------------------------------------
 487
 488 const TRACKER_RATE_LIMITS = {
 489   INTERVAL: 60000 * 5, // 5 minutes
 490   ANNOUNCES_PER_IP_PER_INFOHASH: 15, // maximum announces per torrent in the interval
 491   ANNOUNCES_PER_IP: 30 // maximum announces for all our torrents in the interval
 492 }
 493
 494 // ---------------------------------------------------------------------------
 495
 496 // Special constants for a test instance
 497 if (isTestInstance() === true) {
 498   ACTOR_FOLLOW_SCORE.BASE = 20
 499
 500   REMOTE_SCHEME.HTTP = 'http'
 501   REMOTE_SCHEME.WS = 'ws'
 502
 503   STATIC_MAX_AGE = '0'
 504
 505   ACTIVITY_PUB.COLLECTION_ITEMS_PER_PAGE = 2
 506   ACTIVITY_PUB.ACTOR_REFRESH_INTERVAL = 10 * 1000 // 10 seconds
 507
 508   CONSTRAINTS_FIELDS.ACTORS.AVATAR.FILE_SIZE.max = 100 * 1024 // 100KB
 509
 510   SCHEDULER_INTERVALS_MS.badActorFollow = 10000
 511   SCHEDULER_INTERVALS_MS.removeOldJobs = 10000
 512   SCHEDULER_INTERVALS_MS.updateVideos = 5000
 513
 514   VIDEO_VIEW_LIFETIME = 1000 // 1 second
 515
 516   JOB_ATTEMPTS['email'] = 1
 517
 518   CACHE.VIDEO_CAPTIONS.MAX_AGE = 3000
 519 }
 520
 521 updateWebserverConfig()
 522
 523 // ---------------------------------------------------------------------------
 524
 525 export {
 526   API_VERSION,
 527   VIDEO_CAPTIONS_MIMETYPE_EXT,
 528   AVATARS_SIZE,
 529   ACCEPT_HEADERS,
 530   BCRYPT_SALT_SIZE,
 531   TRACKER_RATE_LIMITS,
 532   CACHE,
 533   CONFIG,
 534   CONSTRAINTS_FIELDS,
 535   EMBED_SIZE,
 536   JOB_CONCURRENCY,
 537   JOB_ATTEMPTS,
 538   LAST_MIGRATION_VERSION,
 539   OAUTH_LIFETIME,
 540   CUSTOM_HTML_TAG_COMMENTS,
 541   BROADCAST_CONCURRENCY,
 542   PAGINATION_COUNT_DEFAULT,
 543   ACTOR_FOLLOW_SCORE,
 544   PREVIEWS_SIZE,
 545   REMOTE_SCHEME,
 546   FOLLOW_STATES,
 547   SERVER_ACTOR_NAME,
 548   PRIVATE_RSA_KEY_SIZE,
 549   ROUTE_CACHE_LIFETIME,
 550   SORTABLE_COLUMNS,
 551   FEEDS,
 552   NSFW_POLICY_TYPES,
 553   STATIC_MAX_AGE,
 554   STATIC_PATHS,
 555   ACTIVITY_PUB,
 556   ACTIVITY_PUB_ACTOR_TYPES,
 557   THUMBNAILS_SIZE,
 558   VIDEO_CATEGORIES,
 559   VIDEO_LANGUAGES,
 560   VIDEO_PRIVACIES,
 561   VIDEO_LICENCES,
 562   VIDEO_STATES,
 563   VIDEO_RATE_TYPES,
 564   VIDEO_MIMETYPE_EXT,
 565   VIDEO_TRANSCODING_FPS,
 566   JOB_REQUEST_TIMEOUT,
 567   JOB_REQUEST_TTL,
 568   USER_PASSWORD_RESET_LIFETIME,
 569   IMAGE_MIMETYPE_EXT,
 570   SCHEDULER_INTERVALS_MS,
 571   STATIC_DOWNLOAD_PATHS,
 572   RATES_LIMIT,
 573   VIDEO_EXT_MIMETYPE,
 574   JOB_COMPLETED_LIFETIME,
 575   VIDEO_VIEW_LIFETIME,
 576   buildLanguages
 577 }
 578
 579 // ---------------------------------------------------------------------------
 580
 581 function getLocalConfigFilePath () {
 582   const configSources = config.util.getConfigSources()
 583   if (configSources.length === 0) throw new Error('Invalid config source.')
 584
 585   let filename = 'local'
 586   if (process.env.NODE_ENV) filename += `-${process.env.NODE_ENV}`
 587   if (process.env.NODE_APP_INSTANCE) filename += `-${process.env.NODE_APP_INSTANCE}`
 588
 589   return join(dirname(configSources[ 0 ].name), filename + '.json')
 590 }
 591
 592 function updateWebserverConfig () {
 593   CONFIG.WEBSERVER.URL = sanitizeUrl(CONFIG.WEBSERVER.SCHEME + '://' + CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.WEBSERVER.PORT)
 594   CONFIG.WEBSERVER.HOST = sanitizeHost(CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.WEBSERVER.PORT, REMOTE_SCHEME.HTTP)
 595 }
 596
 597 function buildLanguages () {
 598   const iso639 = require('iso-639-3')
 599
 600   const languages: { [ id: string ]: string } = {}
 601
 602   const additionalLanguages = {
 603     'sgn': true, // Sign languages (macro language)
 604     'ase': true, // American sign language
 605     'sdl': true, // Arabian sign language
 606     'bfi': true, // British sign language
 607     'bzs': true, // Brazilian sign language
 608     'csl': true, // Chinese sign language
 609     'cse': true, // Czech sign language
 610     'dsl': true, // Danish sign language
 611     'fsl': true, // French sign language
 612     'gsg': true, // German sign language
 613     'pks': true, // Pakistan sign language
 614     'jsl': true, // Japanese sign language
 615     'sfs': true, // South African sign language
 616     'swl': true, // Swedish sign language
 617     'rsl': true, // Russian sign language: true
 618
 619     'epo': true, // Esperanto
 620     'tlh': true, // Klingon
 621     'jbo': true, // Lojban
 622     'avk': true // Kotava
 623   }
 624
 625   // Only add ISO639-1 languages and some sign languages (ISO639-3)
 626   iso639
 627     .filter(l => {
 628       return (l.iso6391 !== null && l.type === 'living') ||
 629         additionalLanguages[l.iso6393] === true
 630     })
 631     .forEach(l => languages[l.iso6391 || l.iso6393] = l.name)
 632
 633   return languages
 634 }
 635
 636 export function reloadConfig () {
 637
 638   function directory () {
 639     if (process.env.NODE_CONFIG_DIR) {
 640       return process.env.NODE_CONFIG_DIR
 641     }
 642
 643     return join(root(), 'config')
 644   }
 645
 646   function purge () {
 647     for (const fileName in require.cache) {
 648       if (-1 === fileName.indexOf(directory())) {
 649         continue
 650       }
 651
 652       delete require.cache[fileName]
 653     }
 654
 655     delete require.cache[require.resolve('config')]
 656   }
 657
 658   purge()
 659
 660   config = require('config')
 661
 662   updateWebserverConfig()
 663 }