file is not removed if upload is canceled

Consider this minimal working example (Multer v1.1.0 on Windows 7, OS X 10.11 and Ubuntu 14.04 with node v4.2.1):

var express = require('express')
var multer  = require('multer')
var upload = multer({ dest: 'uploads/' })
var app = express();

app.post("/upload", upload.single("file"), function(req, res, next){
    res.end("uploaded to: " + req.file.filename);
});
app.listen(80);

and the following test script

# create large test file
$ dd if=/dev/urandom bs=2G count=1 of=upload
# upload
$ curl -F "file=@upload" http://localhost/upload
# upload again, but cancel before upload is finished
timeout -s SIGKILL 2s curl -F "file=@upload" http://localhost/upload

Expected behavior: Only the first file is persisted, the second is removed after the upload got canceled.

Actual behaviour: Both files are stored in the uploads folder

[itsvaibhav10]

Here is my approach worked for me

filename: (req, file, cb) => {
    const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1e9);
    const fileName =
      file.fieldname + '-' + uniqueSuffix + path.extname(file.originalname);
    cb(null, fileName);    
    req.on('aborted', () => {
      const fullFilePath = path.join('uploads', 'videos', fileName);
      file.stream.on('end', () => {
        fs.unlink(fullFilePath, (err) => {
          console.log(fullFilePath);
          if (err) {
            throw err;
          }
        });
      });
      file.stream.emit('end');
    })
  }

[ghost]

I thought perhaps the error handling code from the README was the solution, but it seems the callback is not called if the request is aborted.

This post might help.

EDIT : This is what I came up with :

const upload = multer({dest: __dirname + '/../../resource/'}).single('file')
app.post('/upload', (req, res) => {

    req.on('close', () => {
        console.error('req aborted by client')
        // delete most recent file ?
    })

    upload(req, res, () => {
        // do normal stuff
    })
})

We know when if the upload gets canceled. However the partially uploaded file still can’t be deleted, since only multer knows its name ; deleting the most recent file could be a temporary solution.