Node (express.js) next() is called before end of stream
Use the writable file stream's close event to know when the file descriptor has been closed.
Replace this:
var writeStream = fs.createWriteStream(req.filePath);req.on('data', function(chunk) { writeStream.write(chunk);});req.on('end', function() { writeStream.end(); next();});with this:
req.pipe(fs.createWriteStream(req.filePath)).on('close', next);