server/helpers/express-utils.ts

   1 import * as express from 'express'
   2 import * as multer from 'multer'
   3 import { REMOTE_SCHEME } from '../initializers/constants'
   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 { CONFIG } from '../initializers/config'
   9 import { getExtFromMimetype } from './video'
  10
  11 function buildNSFWFilter (res?: express.Response, paramNSFW?: string) {
  12   if (paramNSFW === 'true') return true
  13   if (paramNSFW === 'false') return false
  14   if (paramNSFW === 'both') return undefined
  15
  16   if (res?.locals.oauth) {
  17     const user = res.locals.oauth.token.User
  18
  19     // User does not want NSFW videos
  20     if (user.nsfwPolicy === 'do_not_list') return false
  21
  22     // Both
  23     return undefined
  24   }
  25
  26   if (CONFIG.INSTANCE.DEFAULT_NSFW_POLICY === 'do_not_list') return false
  27
  28   // Display all
  29   return null
  30 }
  31
  32 function cleanUpReqFiles (req: { files: { [fieldname: string]: Express.Multer.File[] } | Express.Multer.File[] }) {
  33   const files = req.files
  34
  35   if (!files) return
  36
  37   if (isArray(files)) {
  38     (files as Express.Multer.File[]).forEach(f => deleteFileAsync(f.path))
  39     return
  40   }
  41
  42   for (const key of Object.keys(files)) {
  43     const file = files[key]
  44
  45     if (isArray(file)) file.forEach(f => deleteFileAsync(f.path))
  46     else deleteFileAsync(file.path)
  47   }
  48 }
  49
  50 function getHostWithPort (host: string) {
  51   const splitted = host.split(':')
  52
  53   // The port was not specified
  54   if (splitted.length === 1) {
  55     if (REMOTE_SCHEME.HTTP === 'https') return host + ':443'
  56
  57     return host + ':80'
  58   }
  59
  60   return host
  61 }
  62
  63 function badRequest (req: express.Request, res: express.Response) {
  64   return res.type('json').status(400).end()
  65 }
  66
  67 function createReqFiles (
  68   fieldNames: string[],
  69   mimeTypes: { [id: string]: string | string[] },
  70   destinations: { [fieldName: string]: string }
  71 ) {
  72   const storage = multer.diskStorage({
  73     destination: (req, file, cb) => {
  74       cb(null, destinations[file.fieldname])
  75     },
  76
  77     filename: async (req, file, cb) => {
  78       let extension: string
  79       const fileExtension = extname(file.originalname)
  80       const extensionFromMimetype = getExtFromMimetype(mimeTypes, file.mimetype)
  81
  82       // Take the file extension if we don't understand the mime type
  83       if (!extensionFromMimetype) {
  84         extension = fileExtension
  85       } else {
  86         // Take the first available extension for this mimetype
  87         extension = extensionFromMimetype
  88       }
  89
  90       let randomString = ''
  91
  92       try {
  93         randomString = await generateRandomString(16)
  94       } catch (err) {
  95         logger.error('Cannot generate random string for file name.', { err })
  96         randomString = 'fake-random-string'
  97       }
  98
  99       cb(null, randomString + extension)
 100     }
 101   })
 102
 103   const fields: { name: string, maxCount: number }[] = []
 104   for (const fieldName of fieldNames) {
 105     fields.push({
 106       name: fieldName,
 107       maxCount: 1
 108     })
 109   }
 110
 111   return multer({ storage }).fields(fields)
 112 }
 113
 114 function isUserAbleToSearchRemoteURI (res: express.Response) {
 115   const user = res.locals.oauth ? res.locals.oauth.token.User : undefined
 116
 117   return CONFIG.SEARCH.REMOTE_URI.ANONYMOUS === true ||
 118     (CONFIG.SEARCH.REMOTE_URI.USERS === true && user !== undefined)
 119 }
 120
 121 function getCountVideos (req: express.Request) {
 122   return req.query.skipCount !== true
 123 }
 124
 125 // ---------------------------------------------------------------------------
 126
 127 export {
 128   buildNSFWFilter,
 129   getHostWithPort,
 130   isUserAbleToSearchRemoteURI,
 131   badRequest,
 132   createReqFiles,
 133   cleanUpReqFiles,
 134   getCountVideos
 135 }