How to store a file with file extension with multer?

Question

Managed to store my files in a folder but they store without the file extension.

Does any one know how would I store the file with file extension?

Answer 1

I used this little trick to get file extension, and as a workaround to circumvent issues that might occur when someone uploads a file with similar file name twice, or that exists in the server.

const path = require('path');
const crypto = require('crypto');

let upload = multer({
storage: multer.diskStorage({
    destination: (req, file, cb) => {
        cb(null, path.join(__dirname, '../uploads'))
    },
    filename: (req, file, cb) => {
        // randomBytes function will generate a random name
        let customFileName = crypto.randomBytes(18).toString('hex')
        // get file extension from original file name
        let fileExtension = path.extname(file.originalname).split('.')[1];
        cb(null, customFileName + '.' + fileExtension)
    }
  })
})