title: Interceptor not working
body: <p>Im trying to make a Interceptor in AngularJS. I'm quite new to AngularJS and found some examples of Interceptor, but can't get it to work.</p>
  
  <p>Here I have my app.js file, which have all relevant code. I also have a controller which calls a REST api and get JSONP returned.</p>
  
  <p>First I declare the module and then config it (define the Interceptor). It should now catch all requests and output to console... </p>
  
  <p>Is it wrong to create the Interceptor with app.factory? </p>
  
  <pre><code>var app = angular.module(
      'TVPremieresApp',
      [
      'app.services'
        , 'app.controllers'
      ]
  );
  
  app.config(function ($httpProvider) {
      $httpProvider.responseInterceptors.push('errorInterceptor');
  });
  
  app.service('MessageService', function () {
      // angular strap alert directive supports multiple alerts. 
      // Usually this is a distraction to user. 
      //Let us limit the messages to one    
      this.messages = [];
      this.setError = function(msg) {
          this.setMessage(msg, 'error', 'Error:');
      };
      this.setSuccess = function(msg) {
          this.setMessage(msg, 'success', 'Success:');
      };
      this.setInfo = function (msg) {
          this.setMessage(msg, 'info', 'Info:');
      };    
      this.setMessage = function(content, type, title) {
          var message = {
              type: type,
              title: title,
              content: content
          };
          this.messages[0] = message;
      };
      this.clear = function() {
          this.messages = [];
      };
  });
  
  app.factory('errorInterceptor', function ($q, $location, MessageService, $rootScope) {
      return function (promise) {
      // clear previously set message
      MessageService.clear();
  
      return promise.then(function (response) {
        console.log(response);
        return response;
      }, 
      function (response) {
        if (response.status == 404) {
          MessageService.setError('Page not found');
        } 
        else if(response.status &gt;= 500){
          var msg = "Unknown Error.";
  
          if (response.data.message != undefined) {
            msg = response.data.message + " ";
          }
          MessageService.setError(msg);
        }
        // and more
        return $q.reject(response);
      });
    };
  });
  </code></pre>