title: AngularJS $resource custom headers
body: <p>after a couple of understanding-problems, I have run into really hard probs. I can't get my custom headers to work on the $request from AngularJS. My definition looks like this:</p>
  
  <pre><code>$scope.re = $resource('/', {
      callback: 'JSON_CALLBACK'
      }, {
      'updateCart': {
          method: 'POST',
          headers: {
              'module': 'Shop',
              'mod_id': '1',
              'event': 'updateCart'
          }
      }
  });
  </code></pre>
  
  <p>Also here <a href="http://jsfiddle.net/Preexo/HwPtn/" rel="nofollow noreferrer">JSFIDDLE</a></p>
  
  <p>Is this <a href="https://stackoverflow.com/a/12876784/1011116">Issue</a> still active?
  Is there another way to set custom headers?
  Thanks for any help! :)</p>