sample function for file upload

gistfile1.js

Drupal.file = {
	create : function(file_raw) {

		var url = 'http://74.82.57.136/gsk/?q=api/file/create_raw';
		var xhr = Titanium.Network.createHTTPClient();

		xhr.onload = function() {
			var file_object = JSON.parse(this.responseText);
			Ti.API.log(file_object);
                        // Return a file info object. file_object[0].fid is the file id to reference
			Ti.fireEvent('drupal:file:created', file_object[0]);
		}

		xhr.onerror = function() {
			Ti.API.log(this.responseText);
			Ti.API.log(this.status);
			//Drupal.user.logout();
		}
                // file_raw is event.media
		data = {'files[file_contents]' : file_raw};
		xhr.open("POST", url);
		xhr.setRequestHeader('Accept', 'application/json');
		xhr.setRequestHeader('Content-Type', 'multipart/form-data');
		xhr.setRequestHeader('Connection', 'close');
		xhr.send(data);
	}
}