index.js

const express = require('express');
const bodyParser = require('body-parser');
const cors = require('cors');
const logger = require('morgan');
const multipart = require('connect-multiparty');
const fs = require('fs');
const shortid = require('shortid');

let app = express();
let multipartMiddleware = multipart();

app.use(cors());
app.use(logger("dev"));
app.use(bodyParser.json({limit: '50mb'}));
app.use(bodyParser.urlencoded({limit: '50mb', extended: true}));
app.use(express.static('public'));


app.post('/upload', multipartMiddleware, (req, res) => {
  let files = req.files;

	let img = files.image;

	let oldPath = img.path;
  let extension = img.headers['content-type'].split('/')[1];
  let name = shortid.generate();

	let newPath = __dirname + '/public/' + name + '.' + extension;

	fs.rename(oldPath, newPath, (err) => {
		if(err) throw err;
		
		let publicUrl = 'http://localhost:9000/'+ name + '.' + extension;

		res.json({
			publicUrl
		});
	});
});


app.listen(9000);
console.log('Listening on port 9000');