Sencha touch with XML

Question

Could you please review the following? My concern is XML parsing is hardcoded:

 Ext.Ajax.request({
 url: storageDataItem.contentlink,
 success: function (response) {
 var store;
 try {
 var parser = new DOMParser();
 // TODO: remove extra lines or ignore on parsing. How? :)
 var xml = parser.parseFromString(response.responseText, "text/xml");
 var mediaContentURL = response.responseXML.childNodes[0].childNodes[0].childNodes[1].lastChild.attributes[0].nodeValue;
 var title = xml.getElementsByTagName('title')[1].childNodes[0].nodeValue;
 } catch (e) {
 // ignore exception
 }
 console.log("storage: ")
 }
 });
 this.fireEvent("playButtonTapped", storageDataItem);
 this.fireEvent("playAudioFile", title, mediaContentURL);

The actual feed

Answer 1

From looking a little into this

• You derive mediaContentURL through response.responseXML and title through xml, I would stick in both cases to xml
• As you guessed, your approach to getting the mediaContentURL is pretty terrible.
• Use getElementsByTagName and attributes, do not hardcode array indexes
• Do not use console.log in production code

I would use something like this:

function getItemTitle( xml , itemNumber )
{
 //Skip the title number of the playlist
 return xml.getElementsByTagName('title')[itemNumber+1].textContent
}
function getItemURL( xml , itemNumber )
{
 return xml.getElementsByTagName('content')[itemNumber].attributes.getNamedItem('url').value;
}