playing with e4x in firefox: asynchronously loading arbitrary xml as an e4x-ready object

[sourcecode language=‘javascript’]

/* ref: https://developer.mozilla.org/en/Core_JavaScript_1.5_Guide/Processing_XML_with_E4X ref: http://bit.ly/IbKMB prereq: firefox w/ firebug installed and a server running php w/ simplexml note: i’m using a server-side proxy so we can easily make requests to an arbitrary domain usage:

1. put this code in an php file called ‘proxy.php’ (or whatever, but make sure the url in the javascript matches)
2. upload this file to your server
3. run it in firefox
4. look for output in console */

var callback = function (text) { var xml = new XML(text);//convert text to an e4x-ready xml object console.log(xml); }, url = ‘proxy.php?run=true’, req = new XMLHttpRequest();

req.open(‘GET’, url, true); req.onreadystatechange = function () { if (req.readyState == 4 && req.status == 200) { callback(req.responseText);//load up xml from proxy as text } }; req.send(null);

[/sourcecode]