get-express-starter/templates/node-express-boilerplate/src/config/multer.js

Get production ready express boilerplate with a single command

const multer = require('multer');
const path = require('path');
const fs = require('fs');

const ALLOWED_FILE_SIZE = 2000000;
const UPLOAD_DIR = 'src/uploads/';

const storage = multer.diskStorage({
  destination: (req, file, cb) => {
    if (!fs.existsSync(UPLOAD_DIR)) {
      fs.mkdirSync(UPLOAD_DIR, { recursive: true });
    }
    cb(null, UPLOAD_DIR);
  },
  filename: (req, file, cb) => {
    cb(null, `${Date.now()}-${file.originalname}`);
  },
});

const upload = multer({
  storage,
  limits: { fileSize: ALLOWED_FILE_SIZE },
  fileFilter: (req, file, cb) => {
    const allowedTypes = /csv/;
    const extname = allowedTypes.test(path.extname(file.originalname).toLowerCase());
    const mimetype = allowedTypes.test(file.mimetype);

    if (mimetype && extname) {
      return cb(null, true);
    }
    cb(new Error('Error: File upload only supports CSV files!'));
  },
});

module.exports = upload;