Multer doesn't save an extensionand name of file

[megabatz]

From client:
const xhr = new XMLHttpRequest;
xhr.open('POST', '/some/url', true);
xhr.send(new FormData(form));

On server:
import Router from 'koa-router';
import path from 'path';
import multer from 'koa-multer';
const upload = multer({dest: path.join(__dirname, 'pdf')});
const router = new Router();
router.post('some/url', upload.single('file'), controller)

When multer is saving, it gener for file random name without extension.

[sebastialonso]

I'm having the issue. But, for the moment, I'm taken the originalname name. You can take the mimetype field to get the file's content type.