Download the different country codes from the app store.

getCountries.js

// Load deps
var request = require("request");
var jsdom = require("jsdom");

// Request the country change page
request({
    url: "https://itunes.apple.com/WebObjects/MZStore.woa/wa/countrySelectorPage",
	headers: {
		"User-Agent": "iTunes/11.0.0 node-appstore"
	}
}, function(e, r, body) {

	// Load response into jsdom
	jsdom.env(body, function (errors, window) {
		
		// Get each script tag
		var scripts = (window.document.getElementsByTagName("script"));

		// Loop each script
		for (var i in scripts) {

			// Get the script content
			var script = scripts[i].innerHTML;

			// If the script actually has content (not src script tag)
			if (script) {

				// If it's the server data value
				if (script.indexOf("its.serverData") !== -1) {

					// Get data
					var data = (JSON.parse(script.split("its.serverData=")[1]));

					console.log(JSON.stringify(data.pageData.pageData.regions));

				}

			}

		}

		// Clean up
		window.close();

	});

});