How to programmatically get campaign/source/medium for current Visit in Google Analytics

Question

I'd like to know how active are the users depending on the source/medium/campaign of the traffic they came from before sign up. I'm hitting wall when trying to get campaign/source/medium for the current visit from Google Analytics tracker in JS.

I found this tracker.get() method: https://developers.google.com/analytics/devguides/collection/analyticsjs/method-reference#get but they don't specify what are the possible values for 'fieldName'. I inspected the tracker object in Firebug and found out the screen attached screen grab:

Are these the only fields that I can query? Is reading any of the campaign fields possible? I understand that GA intends to be anonymous, but I figured this information is not really a secret...

If I can't retrieve this information from GA tracker, how would you approach this question? Should I set my own cookie whenever there's a visit with utm_ parameters and then read it if the visitor chooses to sign up?

I'm aware of this response: How do I extract Google Analytics campaign data from their cookie with Javascript? but a comment says parsing a cookie won't work for AdWords traffic..

Answer 1

I had to do something similar for a project. You need to think outside of the box to get this working. This will only work for cases where you put the campagn information in the url, for tagged url's.

1) On every page add server side code(php, asp .net) to parse the querystring and save the campagn/source/medium from the url in a session(or cookie)

2) Retrieve this information where you need it and process it.