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