Exploring the capabilities of Angular's $http with Google Feed API

As a beginner, I have been tasked with incorporating an RSS feed into an Angular/Ionic project. The options are to either parse the RSS feed manually or utilize an external tool like the Google Feed API.

I have developed a service to retrieve the data, which is then utilized by an Angular controller.

Here is the code for the service:

.factory('rssReader', ['$http', function($http) {
  return $http.get('URL_HERE')
  .success(function(data) {
    alert("SUCCESS!!!" + data);//return data;
  })
  .error(function(data) {
    alert("FAILED!!!!" + data);//return data;
  });
}]);

When using this CodeCademy URL, I receive a "SUCCESS" alert and obtain JSON data:

However, when attempting to access this Google Feed API URL, I am getting null as the result. Here is an example URL:
http://ajax.googleapis.com/ajax/services/feed/load?v=2.0&q=http://rss.cnn.com/rss/cnn_topstories.rss&num=5

I have come across different approaches online, but I am struggling to understand why this particular method is not yielding the desired outcome.

  1. What could be causing the issue?
  2. What are some helpful tips and tools for debugging in this scenario?

Being new to Angular and JavaScript, any assistance would be greatly appreciated. Thank you!

Answer №1

Your solution appears to be correct, despite the fact that you seem to be invoking the .success function in both your service and controller. However, it seems like the issue lies within the resource you are attempting to access.

When I try to retrieve data from the s3.amazonaws feed, everything works fine. But when I attempt to make a call to the GoogleAPI, the XMLHttpRequest is blocked due to CORS restrictions. You can find more information about this problem here: CORS (Cross-Origin Resource Sharing) header.

One way to work around this issue could be to handle the request to the Google API on the server side instead of directly in the browser.

I hope this explanation proves helpful :)

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