Spy of XMLHttpRequest

xmlhttprequest.spy.js

(function() {
	var prototype = XMLHttpRequest.prototype,
		open = prototype.open,
		send = prototype.send;

	prototype.open = function() {
		alert('open: ' + JSON.stringify(arguments));

		open.apply(this, arguments);
	};

	prototype.send = function() {
		alert('send: ' + JSON.stringify(arguments));

		this.addEventListener('load', function() {
			alert('load: ' + JSON.stringify(arguments));
		});

		send.apply(this, arguments);
	};
})();