title: Force HTTP interceptor in dynamic ngSrc request
body: <p>I've created an AngularJS application that loads images from an OAuth secured backend. My OAuth library is configured by adding an extra interceptor to the Angular <code>$httpProvider</code> to add the correct authentication header.</p>
  
  <p>My source code in my <code>HTML</code> template looks like this:</p>
  
  <pre><code>&lt;img ng-src="{{ '/users/1/images/' + imageId }}"&gt;
  </code></pre>
  
  <p>My problem is that the http request that is created by the <code>ngSrc</code> directive is ignored by the <code>$http</code> implementation, which results in a request with the wrong authentication.
  The normal API calls function correct (the ones invoked by my controllers/services by using <code>$http</code> and <code>$resource</code> directly).</p>