Node Proxy Example

all-in-one.js

'use strict';
var port = parseInt(process.env.PROXY_PORT || process.env.PORT || 8000);

process.env.PROXY_PORT  = port;
process.env.STATIC_PORT = port + 1;
process.env.API_PORT    = port + 2;
process.env.CHAT_PORT   = port + 3;

require('./proxy-server');
require('./static-server');
require('./api-server');
require('./chat-server');

proxy-server.js

'use strict';
var url = require('url');
var fs = require('fs');
var httpProxy = require('http-proxy');
var sslCfg = require('config').get('ssl');
var port = parseInt(process.env.PROXY_PORT || process.env.PORT || 8000);
var staticUrl = process.env.STATIC_URL || 'http://127.0.0.1:' + process.env.STATIC_PORT;
var apiUrl    = process.env.API_URL    || 'http://127.0.0.1:' + process.env.API_PORT;
var chatUrl   = process.env.CHAT_URL   || 'http://127.0.0.1:' + process.env.CHAT_PORT;

//
// Create a proxy server with custom application logic
//
var proxy = httpProxy.createProxy();

//
// Create your custom server and just call `proxy.web()` to proxy
// a web request to the target passed in the options
//
var onRequest = function(req, res) {
    var pathname = url.parse(req.url).pathname;
    var targetUrl = staticUrl;
    if (pathname.toLowerCase().indexOf('/api/') === 0) {
        targetUrl = apiUrl;
    }
    return proxy.web(req, res, {target: targetUrl});
};

var server;
if (sslCfg.enabled) {
    var serverOptions = {
        key:  fs.readFileSync(sslCfg.key),
        cert: fs.readFileSync(sslCfg.cert)
    };
    server = require('https').createServer(serverOptions, onRequest);
} else {
    server = require('http').createServer(onRequest);
}

// You can also use `proxy.ws()` to proxy a websockets request
server.on('upgrade', function(req, socket, head) {
    proxy.ws(req, socket, head, {target: chatUrl});
});

server.listen(port, function() {
    console.log('proxy listening on port:', port);
});