Simple express server with compression enabled.

index.js

/**
 * Simple express server with a dynamic gz compression enabled.
 */
"use strict";

const express = require("express");
const cors = require("cors");
const compression = require('compression');
const morgan = require('morgan');


const logger = function (req, res, next) {
// custom logger which can be activated with .use(logger)

  console.log(Date.now(), req.headers['accept-encoding']);
  console.log(Date.now(), req.body);
  next();
};

express()
	.use(cors())                        // allow all of the cors

    	.use(compression())                 // allow gzip cmpression (express >= 3)
	//  When enabled, compression middleware gzips all of the requested files
	//  cons: lower traffic, pros: cpu utilization + responce time

    	.use(morgan(':method :url :status :res[content-length] - :response-time ms - :req[accept-encoding]'))
	.use(express.static('public'))      // source of the files
	.listen(3001);                      // port to serve