Minimal Node.js Proxy Server Module (with Gulp)

gulpfile.js

var proxy = require('proxy.js')();
proxy.run();

proxy.js

var express = require('express'),
    app = express(),
    https = require('https'),
    request = require('request'),
    bodyParser = require('body-parser'),
    PROXY_PORT = 12345,
    HTTPS_POST = 443,
    API_ENDPOINT = '/v3',
    CONTENT_TYPE = 'application/json',
    HTTPS_HOST = 'sub.domain.com';

var Server = function() {
    
    var init = function() {
            try {
                app.listen(PROXY_PORT);
            } catch (err) {
                console.error(err.message);
            }

            app.use(bodyParser.json());
            console.log('EXPRESS.JS SERVER LISTENING ON PORT:', PROXY_PORT)
        };

    var bind = function() {
        app.use(API_ENDPOINT, function(req, res, next) {
            res.header("Access-Control-Allow-Origin", "*");
            res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");

            console.log(new Date(), ' -- Rquest Received:', req.body, req.url);
            https_req(req, res, next);
        });
    };

    var https_req = function(req, res, next) {
        var options = {
                hostname: HTTPS_HOST,
                port: HTTPS_POST,
                path: API_ENDPOINT + req.url,
                method: 'POST',
                headers: {
                    'Content-Type': CONTENT_TYPE
                }
            },
            body = '',
            requ = https.request(options, function(https_res) {
                console.log(new Date(), 'statusCode: ', https_res.statusCode);
                console.log(new Date(), 'headers: ', https_res.headers);

                https_res.on('data', function(d) {
                    body += d;
                });

                https_res.on('end', function() {
                    res.send(body);
                    console.log(new Date(), 'Sent request: ', req.body);
                    next();
                });

            });

        requ.write(JSON.stringify(req.body));
        requ.end();
    };

    return {
        run: function() {
            init();
            bind();
        }
    };
};


Server.prototype.run = Server.run;
module.exports = Server;