Count the public IP addresses in each of the Azure DCs

gistfile1.js

var xml2js = require('xml2js');
var fs = require('fs');
var Netmask = require('netmask').Netmask;

// download from here http://www.microsoft.com/en-gb/download/details.aspx?id=41653
var xml = fs.readFileSync('ip-ranges.xml').toString();

xml2js.parseString(xml, function(err, json){
	var output = {};
	var total = 0;
	json.AzurePublicIpAddresses.Region.forEach(function(x){
		output[x.$.Name] = 0;
		x.IpRange.forEach(function(z){
			var block = new Netmask(z.$.Subnet);
			//console.log(block);
			output[x.$.Name] += block.size;
			total += block.size;
		});
	});
	console.log(output)
	console.log(total)
});