Scaffold Your Clean DDD Web Application - Part 4: Global Exception Handling in ASP.NET Core and Angular

In this blog entry I’ll go over using custom ASP.NET Core middleware to catch various kinds of exceptions so that we can return the proper HTTP status code to the user’s browser. At the Angular side we’ll take advantage of these status codes in order to direct the user to the appropriate pages on an error—an "unauthorized" page or general error page—or simply display a notification. This is one approach to handling server exceptions which are prone to "bubble up" from lower layers of the stack, such as the Application and Domain layers, and elegantly updating the UI.