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 (
  31   fieldNames: string[],
  32   mimeTypes: { [ id: string ]: string },
  33   destinations: { [ fieldName: string ]: string }
  34 ) {
  35   const storage = multer.diskStorage({
  36     destination: (req, file, cb) => {
  37       cb(null, destinations[file.fieldname])
  38     },
  39
  40     filename: async (req, file, cb) => {
  41       const extension = mimeTypes[file.mimetype]
  42       let randomString = ''
  43
  44       try {
  45         randomString = await generateRandomString(16)
  46       } catch (err) {
  47         logger.error('Cannot generate random string for file name.', { err })
  48         randomString = 'fake-random-string'
  49       }
  50
  51       cb(null, randomString + extension)
  52     }
  53   })
  54
  55   const fields = []
  56   for (const fieldName of fieldNames) {
  57     fields.push({
  58       name: fieldName,
  59       maxCount: 1
  60     })
  61   }
  62
  63   return multer({ storage }).fields(fields)
  64 }
  65
  66 async function generateRandomString (size: number) {
  67   const raw = await pseudoRandomBytesPromise(size)
  68
  69   return raw.toString('hex')
  70 }
  71
  72 interface FormattableToJSON {
  73   toFormattedJSON ()
  74 }
  75
  76 function getFormattedObjects<U, T extends FormattableToJSON> (objects: T[], objectsTotal: number) {
  77   const formattedObjects: U[] = []
  78
  79   objects.forEach(object => {
  80     formattedObjects.push(object.toFormattedJSON())
  81   })
  82
  83   const res: ResultList<U> = {
  84     total: objectsTotal,
  85     data: formattedObjects
  86   }
  87
  88   return res
  89 }
  90
  91 async function isSignupAllowed () {
  92   if (CONFIG.SIGNUP.ENABLED === false) {
  93     return false
  94   }
  95
  96   // No limit and signup is enabled
  97   if (CONFIG.SIGNUP.LIMIT === -1) {
  98     return true
  99   }
 100
 101   const totalUsers = await UserModel.countTotal()
 102
 103   return totalUsers < CONFIG.SIGNUP.LIMIT
 104 }
 105
 106 function computeResolutionsToTranscode (videoFileHeight: number) {
 107   const resolutionsEnabled: number[] = []
 108   const configResolutions = CONFIG.TRANSCODING.RESOLUTIONS
 109
 110   const resolutions = [
 111     VideoResolution.H_240P,
 112     VideoResolution.H_360P,
 113     VideoResolution.H_480P,
 114     VideoResolution.H_720P,
 115     VideoResolution.H_1080P
 116   ]
 117
 118   for (const resolution of resolutions) {
 119     if (configResolutions[resolution + 'p'] === true && videoFileHeight > resolution) {
 120       resolutionsEnabled.push(resolution)
 121     }
 122   }
 123
 124   return resolutionsEnabled
 125 }
 126
 127 function resetSequelizeInstance (instance: Model<any>, savedFields: object) {
 128   Object.keys(savedFields).forEach(key => {
 129     const value = savedFields[key]
 130     instance.set(key, value)
 131   })
 132 }
 133
 134 let serverActor: ActorModel
 135 async function getServerActor () {
 136   if (serverActor === undefined) {
 137     const application = await ApplicationModel.load()
 138     serverActor = application.Account.Actor
 139   }
 140
 141   if (!serverActor) {
 142     logger.error('Cannot load server actor.')
 143     process.exit(0)
 144   }
 145
 146   return Promise.resolve(serverActor)
 147 }
 148
 149 type SortType = { sortModel: any, sortValue: string }
 150
 151 // ---------------------------------------------------------------------------
 152
 153 export {
 154   badRequest,
 155   generateRandomString,
 156   getFormattedObjects,
 157   isSignupAllowed,
 158   computeResolutionsToTranscode,
 159   resetSequelizeInstance,
 160   getServerActor,
 161   SortType,
 162   getHostWithPort,
 163   createReqFiles
 164 }