monkey patch net.connect nodejs to support SRV records

gistfile1.js

// Proof of concept of monkey patching net.connect to make it support SRV records
// If require a monkey patched connect function before any other requires we can make a generic fix for handling SRV records
// We need of course to handle a few different cases & more robust error handling
// We can require a lib and even specify a filter for which hosts to resolve SRV and which not

var net = require('net');
var dns = require('dns');

// Set a specific Nameserver to be used
dns.setServers(['172.17.42.1']);

var oconnect = net.connect;
var oconnect = function() {
        console.log(arguments);
}

// Monkey Patch connect
net.connect = function nconnect() {
        var type = typeof arguments[0];

        if (type === 'object') {
                var host = arguments[0].host || 'localhost';
                // Find SRV record
                dns.resolveSrv(host, function(err, addr) {
                        // read the port from SRV record
                        var newPort = addr[0].port;

                        // Set SRV port
                        var newArguments = Array.prototype.slice.call(arguments, 1);
                        newArguments[0][0].port = newPort;

                        // Call original function
                        oconnect.apply(this, newArguments);
                })
        } else {
                var host = arguments[0]
                var newArguments = Array.prototype.slice.call(arguments, 1);
                arguments[0].port = addr[0].port;
                // handle more cases
                // ...
        }
}

net.connect({ port: 30 , host: 'db.service.consul'});