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 { generateRandomString } from './utils'
   7
   8 function isNSFWHidden (res: express.Response) {
   9   if (res.locals.oauth) {
  10     const user: User = res.locals.oauth.token.User
  11     if (user) return user.nsfwPolicy === 'do_not_list'
  12   }
  13
  14   return CONFIG.INSTANCE.DEFAULT_NSFW_POLICY === 'do_not_list'
  15 }
  16
  17 function getHostWithPort (host: string) {
  18   const splitted = host.split(':')
  19
  20   // The port was not specified
  21   if (splitted.length === 1) {
  22     if (REMOTE_SCHEME.HTTP === 'https') return host + ':443'
  23
  24     return host + ':80'
  25   }
  26
  27   return host
  28 }
  29
  30 function badRequest (req: express.Request, res: express.Response, next: express.NextFunction) {
  31   return res.type('json').status(400).end()
  32 }
  33
  34 function createReqFiles (
  35   fieldNames: string[],
  36   mimeTypes: { [ id: string ]: string },
  37   destinations: { [ fieldName: string ]: string }
  38 ) {
  39   const storage = multer.diskStorage({
  40     destination: (req, file, cb) => {
  41       cb(null, destinations[ file.fieldname ])
  42     },
  43
  44     filename: async (req, file, cb) => {
  45       const extension = mimeTypes[ file.mimetype ]
  46       let randomString = ''
  47
  48       try {
  49         randomString = await generateRandomString(16)
  50       } catch (err) {
  51         logger.error('Cannot generate random string for file name.', { err })
  52         randomString = 'fake-random-string'
  53       }
  54
  55       cb(null, randomString + extension)
  56     }
  57   })
  58
  59   const fields = []
  60   for (const fieldName of fieldNames) {
  61     fields.push({
  62       name: fieldName,
  63       maxCount: 1
  64     })
  65   }
  66
  67   return multer({ storage }).fields(fields)
  68 }
  69
  70 // ---------------------------------------------------------------------------
  71
  72 export {
  73   isNSFWHidden,
  74   getHostWithPort,
  75   badRequest,
  76   createReqFiles
  77 }