Getting 'Traffic Source' in universal analytics

Question

How to get Traffic source data in universal analytics?

I'm trying the following code in firebug console:-

ga(function(tracker) {
  var src = tracker.get('campaignSource');
  console.log(src);
});

But it always logs 'undefined'.

The field 'campaignMedium' also returns 'undefined'.

But I get correct values for some fields like 'clientId' or 'screenResolution' or 'language'.

Is there some other process to get these infromation?

P.S: I'm using https://developers.google.com/analytics/devguides/collection/analyticsjs/field-reference#trafficsources for reference of field names.

Answer 1

I don't believe you can because campaign info is all stored server-side. The reason you're able to get the value of the fields for 'clientId', 'screenResolution' and 'language' is that they are stored client-side.

If you wanted to get the campaign source, etc., you'd have to create your own cookie and store the campaign values there.