Handling 401s globally with Angular

Question

In my Angular 2 project I make API calls from services that return an Observable. The calling code then subscribes to this observable. For example:

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Answer 1

From Angular >= 2.3.0 you can override the HTTP module and inject your services. Before version 2.3.0, you couldn't use your injected services due to a core bug.

I've created a gist to show how it's done.