How to remove incomplete uploaded file?

Question

How to remove incomplete uploaded file?

I am creating a node server to upload files using 'express','fs' and 'busboy' module. The server is working as expected but when I cancel the upload before complete, the incomplete file is stored in the filesystem. How can I remove the incomplete file?

var express = require("express"),
fs = require("fs"),
Busboy = require("busboy");
app = express();
app.listen(7000);
app.get("/", display_form);
app.post("/upload", function(req, res) {
var busboy = new Busboy({
    headers: req.headers
});
busboy.on("file", function(fieldname, file, filename, encoding, mime) {
    var fstream = fs.createWriteStream("./uploads/" + filename);
    file.pipe(fstream);
    file.on("data", function(chunk) {
        console.log(chunk.length);
    });
    file.on("end", function() {
        console("end");
    });

    fstream.on("close", function() {
        fstream.close();
        console("fstream close");
    });
    fstream.on("error", function() {
        console("fstream error ");
    });
});
busboy.on("finish", function() {
    console.log("uploaded");
    res.send("file uploaded");
});
busboy.on("error", function() {
    console("error busboy");
});
req.pipe(busboy);
});

node.js
busboy

Answer 1

I don't know busboy, but you open a stream and never close it. Why don't you exploit the stream and filename to 'finish' and 'error' and act accordingly?

Example:

busboy.on('error', function() {
    fs.unlink('./uploads/' + filename);
    console.log('error busboy');
}

Answer 2

Thanks for your help and I finally I found a way to this problem. I added under mentioned code snippet and its working fine.

req.on("close", function(err) {
        fstream.end();
        fs.unlink('./uploads/' + name);
        console.log("req aborted by client");
    });