Test setRequestHeader

app.js

var win = Ti.UI.createWindow({
	backgroundColor : 'white',
	fullscreen : true
});
var button = Ti.UI.createButton({
	title : 'test',
	height : 60,
	width : 200
});
win.add(button);
button.addEventListener('click', function(e) {
			var xhr = Titanium.Network.createHTTPClient();
			xhr.open('GET', 'http://10.0.15.101/~jalter/test/index.php');
			xhr.onerror = function(e) {
				alert(e.error);
				Ti.API.info('error: '+e.error);
			};
			xhr.setTimeout(200000);
			xhr.onload = function(e) {
				Ti.UI.createAlertDialog({
					title : 'Success',
					message : this.responseText
				}).show();
				Ti.API.info('onload: '+this.responseText);
			};
			xhr.onsendstream = function(e) {
				Ti.API.info(e);
			};
			xhr.setRequestHeader('Content-Type','application/json');
			xhr.send();
});
win.open();

index.php

<?php
$headers = apache_request_headers();

foreach ($headers as $header => $value) {
    echo "$header: $value <br />\n";
}
?>