app.js

const multer = require('multer');
const upload = multer({ dest: 'uploads/' })

const express = require('express');
const http = require('http');
const app = express();
var path = require('path');
const server = http.createServer(app);

var port = normalizePort(process.env.PORT || '4116');

app.get('/', function (req, res, next) {
    res.sendFile(path.join(__dirname + `/upload.html`));
});

app.post('/stats', upload.single('uploaded_file'), function (req, res) {
    // req.file is the name of your file in the form above, here 'uploaded_file'
    // req.body will hold the text fields, if there were any 
    console.log(req.file, req.body)
 });

app.post('/profile', upload.single('avatar'), function (req, res, next) {
    // req.file is the `avatar` file
    // req.body will hold the text fields, if there were any
})

app.post('/photos/upload', upload.array('photos', 12), function (req, res, next) {
    // req.files is array of `photos` files
    // req.body will contain the text fields, if there were any
})

const cpUpload = upload.fields([{ name: 'avatar', maxCount: 1 }, { name: 'gallery', maxCount: 8 }])
app.post('/cool-profile', cpUpload, function (req, res, next) {
    // req.files is an object (String -> Array) where fieldname is the key, and the value is array of files
    //
    // e.g.
    //  req.files['avatar'][0] -> File
    //  req.files['gallery'] -> Array
    //
    // req.body will contain the text fields, if there were any
});


function normalizePort(val) {
    var port = parseInt(val, 10);

    if (isNaN(port)) {
        return val;
    }

    if (port >= 0) {
        return port;
    }

    return false;
};

server.listen(port, () => {
    console.log(`Listening in port : ${port}`);
    console.log(`Click to open : http://localhost:${port}`);
});