server/helpers/utils.ts

   1 import * as express from 'express'
   2 import * as multer from 'multer'
   3 import { Model } from 'sequelize-typescript'
   4 import { ResultList } from '../../shared'
   5 import { VideoResolution } from '../../shared/models/videos'
   6 import { CONFIG, REMOTE_SCHEME } from '../initializers'
   7 import { UserModel } from '../models/account/user'
   8 import { ActorModel } from '../models/activitypub/actor'
   9 import { ApplicationModel } from '../models/application/application'
  10 import { pseudoRandomBytesPromise } from './core-utils'
  11 import { logger } from './logger'
  12
  13 function getHostWithPort (host: string) {
  14   const splitted = host.split(':')
  15
  16   // The port was not specified
  17   if (splitted.length === 1) {
  18     if (REMOTE_SCHEME.HTTP === 'https') return host + ':443'
  19
  20     return host + ':80'
  21   }
  22
  23   return host
  24 }
  25
  26 function badRequest (req: express.Request, res: express.Response, next: express.NextFunction) {
  27   return res.type('json').status(400).end()
  28 }
  29
  30 function createReqFiles (fieldName: string, storageDir: string, mimeTypes: { [ id: string ]: string }) {
  31   const storage = multer.diskStorage({
  32     destination: (req, file, cb) => {
  33       cb(null, storageDir)
  34     },
  35
  36     filename: async (req, file, cb) => {
  37       const extension = mimeTypes[file.mimetype]
  38       let randomString = ''
  39
  40       try {
  41         randomString = await generateRandomString(16)
  42       } catch (err) {
  43         logger.error('Cannot generate random string for file name.', err)
  44         randomString = 'fake-random-string'
  45       }
  46
  47       cb(null, randomString + extension)
  48     }
  49   })
  50
  51   return multer({ storage }).fields([{ name: fieldName, maxCount: 1 }])
  52 }
  53
  54 async function generateRandomString (size: number) {
  55   const raw = await pseudoRandomBytesPromise(size)
  56
  57   return raw.toString('hex')
  58 }
  59
  60 interface FormattableToJSON {
  61   toFormattedJSON ()
  62 }
  63
  64 function getFormattedObjects<U, T extends FormattableToJSON> (objects: T[], objectsTotal: number) {
  65   const formattedObjects: U[] = []
  66
  67   objects.forEach(object => {
  68     formattedObjects.push(object.toFormattedJSON())
  69   })
  70
  71   const res: ResultList<U> = {
  72     total: objectsTotal,
  73     data: formattedObjects
  74   }
  75
  76   return res
  77 }
  78
  79 async function isSignupAllowed () {
  80   if (CONFIG.SIGNUP.ENABLED === false) {
  81     return false
  82   }
  83
  84   // No limit and signup is enabled
  85   if (CONFIG.SIGNUP.LIMIT === -1) {
  86     return true
  87   }
  88
  89   const totalUsers = await UserModel.countTotal()
  90
  91   return totalUsers < CONFIG.SIGNUP.LIMIT
  92 }
  93
  94 function computeResolutionsToTranscode (videoFileHeight: number) {
  95   const resolutionsEnabled: number[] = []
  96   const configResolutions = CONFIG.TRANSCODING.RESOLUTIONS
  97
  98   const resolutions = [
  99     VideoResolution.H_240P,
 100     VideoResolution.H_360P,
 101     VideoResolution.H_480P,
 102     VideoResolution.H_720P,
 103     VideoResolution.H_1080P
 104   ]
 105
 106   for (const resolution of resolutions) {
 107     if (configResolutions[resolution.toString()] === true && videoFileHeight > resolution) {
 108       resolutionsEnabled.push(resolution)
 109     }
 110   }
 111
 112   return resolutionsEnabled
 113 }
 114
 115 function resetSequelizeInstance (instance: Model<any>, savedFields: object) {
 116   Object.keys(savedFields).forEach(key => {
 117     const value = savedFields[key]
 118     instance.set(key, value)
 119   })
 120 }
 121
 122 let serverActor: ActorModel
 123 async function getServerActor () {
 124   if (serverActor === undefined) {
 125     const application = await ApplicationModel.load()
 126     serverActor = application.Account.Actor
 127   }
 128
 129   if (!serverActor) {
 130     logger.error('Cannot load server actor.')
 131     process.exit(0)
 132   }
 133
 134   return Promise.resolve(serverActor)
 135 }
 136
 137 type SortType = { sortModel: any, sortValue: string }
 138
 139 // ---------------------------------------------------------------------------
 140
 141 export {
 142   badRequest,
 143   generateRandomString,
 144   getFormattedObjects,
 145   isSignupAllowed,
 146   computeResolutionsToTranscode,
 147   resetSequelizeInstance,
 148   getServerActor,
 149   SortType,
 150   getHostWithPort,
 151   createReqFiles
 152 }