server/helpers/express-utils.ts

   1 import * as express from 'express'
   2 import * as multer from 'multer'
   3 import { CONFIG, REMOTE_SCHEME } from '../initializers'
   4 import { logger } from './logger'
   5 import { deleteFileAsync, generateRandomString } from './utils'
   6 import { extname } from 'path'
   7 import { isArray } from './custom-validators/misc'
   8 import { UserModel } from '../models/account/user'
   9
  10 function buildNSFWFilter (res?: express.Response, paramNSFW?: string) {
  11   if (paramNSFW === 'true') return true
  12   if (paramNSFW === 'false') return false
  13   if (paramNSFW === 'both') return undefined
  14
  15   if (res && res.locals.oauth) {
  16     const user: UserModel = res.locals.oauth.token.User
  17
  18     // User does not want NSFW videos
  19     if (user.nsfwPolicy === 'do_not_list') return false
  20
  21     // Both
  22     return undefined
  23   }
  24
  25   if (CONFIG.INSTANCE.DEFAULT_NSFW_POLICY === 'do_not_list') return false
  26
  27   // Display all
  28   return null
  29 }
  30
  31 function cleanUpReqFiles (req: { files: { [ fieldname: string ]: Express.Multer.File[] } | Express.Multer.File[] }) {
  32   const files = req.files
  33
  34   if (!files) return
  35
  36   if (isArray(files)) {
  37     (files as Express.Multer.File[]).forEach(f => deleteFileAsync(f.path))
  38     return
  39   }
  40
  41   for (const key of Object.keys(files)) {
  42     const file = files[ key ]
  43
  44     if (isArray(file)) file.forEach(f => deleteFileAsync(f.path))
  45     else deleteFileAsync(file.path)
  46   }
  47 }
  48
  49 function getHostWithPort (host: string) {
  50   const splitted = host.split(':')
  51
  52   // The port was not specified
  53   if (splitted.length === 1) {
  54     if (REMOTE_SCHEME.HTTP === 'https') return host + ':443'
  55
  56     return host + ':80'
  57   }
  58
  59   return host
  60 }
  61
  62 function badRequest (req: express.Request, res: express.Response, next: express.NextFunction) {
  63   return res.type('json').status(400).end()
  64 }
  65
  66 function createReqFiles (
  67   fieldNames: string[],
  68   mimeTypes: { [ id: string ]: string },
  69   destinations: { [ fieldName: string ]: string }
  70 ) {
  71   const storage = multer.diskStorage({
  72     destination: (req, file, cb) => {
  73       cb(null, destinations[ file.fieldname ])
  74     },
  75
  76     filename: async (req, file, cb) => {
  77       const extension = mimeTypes[ file.mimetype ] || extname(file.originalname)
  78       let randomString = ''
  79
  80       try {
  81         randomString = await generateRandomString(16)
  82       } catch (err) {
  83         logger.error('Cannot generate random string for file name.', { err })
  84         randomString = 'fake-random-string'
  85       }
  86
  87       cb(null, randomString + extension)
  88     }
  89   })
  90
  91   let fields: { name: string, maxCount: number }[] = []
  92   for (const fieldName of fieldNames) {
  93     fields.push({
  94       name: fieldName,
  95       maxCount: 1
  96     })
  97   }
  98
  99   return multer({ storage }).fields(fields)
 100 }
 101
 102 function isUserAbleToSearchRemoteURI (res: express.Response) {
 103   const user: UserModel = res.locals.oauth ? res.locals.oauth.token.User : undefined
 104
 105   return CONFIG.SEARCH.REMOTE_URI.ANONYMOUS === true ||
 106     (CONFIG.SEARCH.REMOTE_URI.USERS === true && user !== undefined)
 107 }
 108
 109 // ---------------------------------------------------------------------------
 110
 111 export {
 112   buildNSFWFilter,
 113   getHostWithPort,
 114   isUserAbleToSearchRemoteURI,
 115   badRequest,
 116   createReqFiles,
 117   cleanUpReqFiles
 118 }