Renaming an uploaded file using Multer doesn't work (Express.js)

Question

I\'m trying to upload a file from a HTML form using Express.js and Multer. I\'ve managed to save the file to the desired location (a folder named uploads).

Howe

Answer 1

I know this post is dated. I want to contribute to those who may arrive later. Below is a full functional server script to handle multiple uploaded pictures with random saved pictures names and file extension.

var express = require("express");
var multer = require("multer");
var app = express();
var path = require("path");
var uuid = require("uuid");

// Allow cross origin resource sharing (CORS) within our application
app.use(function(req, res, next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
    next();
});

var storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, 'uploadedimages/')
  },
  filename: function (req, file, cb) {
    cb(null, uuid.v4() + path.extname(file.originalname));
  }
})

var upload = multer({ storage: storage })

// "files" should be the same name as what's coming from the field name on the client side.
app.post("/upload", upload.array("files", 12), function(req, res) {
    res.send(req.files);
    console.log("files = ", req.files);
});

var server = app.listen(3000, function() {
    console.log("Listening on port %s...", server.address().port);
});