Convert File to buffer using multer

fileToBuffer.js

// type of files allowed
const fileFilter = (req, file, cb) => {
  if (file.originalname.match(/\.(jpg|JPG|jpeg|JPEG|png|PNG|gif|GIF)$/)) {
    cb(null, true)
  } else {
    cb(null, false)
  }
}

const storage = multer.memoryStorage()

exports.processFile = multer({
  storage: storage,
  limits: {
    fileSize: 1024 * 1024 * 10 // 10 mb
  },
  fileFilter: fileFilter,
  upload: (err) => {
    if (err instanceof multer.MulterError) {
      throw new Error('error in uploading ' + err)
    }
  }
})