upload with curl

I have a minimal example done with express.js but I cant get it to work. here is my routes/index.js:

var express = require('express');
var router = express.Router();

var multer              = require("multer");
var upload              = multer({ destination: './'})

router.post('/restapi', upload.single('weg'), function(req, res, next){
  console.log("here");
  console.log(req.file);
  console.log(req.body);

  if(!req.file){
    res.json({"error": "not working"});
    return;
  }

    res.json({"error": "test"});
    return;
});

router.get('/', function(req, res, next) {
  res.json({ "title": "Express" });
  return;
});
module.exports = router;

I want to upload a file to the server with the command:

curl -F weg=@weg.txt localhost:port/restapi; echo {“error”:“not working”}

and my output on the server side is:

node ./bin/www

here undefined {} POST /restapi 200 17.450 ms - 23 here { fieldname: ‘weg’, originalname: ‘weg.txt’, encoding: ‘7bit’, mimetype: ‘text/plain’, buffer:

So the file does get uploaded eventually but before the server returns to the client with the error message “not working” because req.file is undefined. Can anyone help?

[Wildflyy]

I ran another test using Postman and there the example we set up works just fine. So I suppose it has something to do with my cURL. I am sorry for the inconvenience but I wouldn’t have guessed that something is wrong on that side.

[Wildflyy]

I added your suggestion but with minor adapdation to create a log:

//const logRequest = (_, __, ___, next) => { console.log('request received'); next() }
const logRequest = (_, __, ___, next) => { console.log('request received'); }

router.post('/restapi', logRequest, upload.single('weg'), function(req, res, next){

  logRequest();
  console.log("here");
```
My result is:

> Example app listening on port 8080!
> request received
> here
> undefined
> {}
> request received
> here
> { fieldname: 'weg',
>   originalname: 'weg.txt',
>   encoding: '7bit',
>   mimetype: 'text/plain',
>   buffer:
> ....

But I am not sure that is what you wanted to see. When I don't add the "logRequest();" it doesn't log. If I add "loqRequest();" with your orignial suggestion I get a TypeError "next is not a function".