Return statusCode with message in fileFilter multer-CodePudding

I want to make a filter for uploaded files using multer package, and my validation works.

But I want when user send wrong files, I return statusCode and message together.

NOTE: I can send message or send statusCode but I want send both.

here is my code

import { v4 as uuidv4 } from "uuid"
import multer from "multer";

const AVAILABLE_IMAGE_FORMATS = ["image/jpg", "image/jpeg", "image/png", "image/gif"]
const __dir_images__ = `${__dirname__}/../uploads/images`

class HandledRespError {
  constructor(statusCode = 500, message = Messages.failed) {
    return {
      statusCode: statusCode,
      message: message
    }
  }
}

const multerStorageFileName = function(req, file, cb) {
  const uniqueName = uuidv4()   "--"   file.originalname
  return cb(null, uniqueName)
}

const imageStorage = multer.diskStorage({
  destination: __dir_images__,
  filename: multerStorageFileName
});

const imageFileFilter = function(req, file, cb) {
  if ( ! AVAILABLE_IMAGE_FORMATS.includes(file.mimetype) ) return cb(new HandledRespError(406), false) // I think my problem is here

  cb(null, true)
}

export const imageUpload = multer({storage: imageStorage, fileFilter: imageFileFilter})

if I use return cb( "my message", false) or return cb( new Error("my message"), false) it will return my message with statusCode 500.

if I send return cb({statusCode:406, message: "my message"}, false) or return cb({status:406, message: "my message"}, false), it will return statusCode 406 and message will be [object object]

how can I handle both statusCode and message together?

CodePudding user response：

Set the statusCode property on the error object rather than passing it as a parameter:

var err = new Error("error 406");
err.statusCode = 406;
return cb(err);