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