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What is Exceptionfilterattribute?

What is Exceptionfilterattribute?

The exception filter attribute is to do something in the event of an exception so you can handle it in a generic manner like redirecting to an error page or sending back a generic exception message in the json response, etc. The exception filter attribute itself is not an exception, it handles the exception.

What is exception handling in Web API?

Introduction. Exceptions are the errors that happen at runtime. Exception handling is the technique to handle this runtime error in our application code. If any error is thrown in web API that is caught, it is translated into an HTTP response with status code 500- “Internal Server Error”.

How do I register an exception filter globally?

To apply the filter globally to all Web API controllers, add an instance of the filter to the GlobalConfiguration. Configuration. Filters collection. Exception filters in this collection apply to any Web API controller action.

What are the different ways in which we can handle runtime errors in Web API application code?

To recap:

  • Use HttpResponseException or the shortcut methods to deal with unhandled exceptions at the action level.
  • Use Exception Filters to deal with particular unhandled exceptions on multiple actions and controllers.
  • Use an instance of ExceptionLogger to log any unhandled exception.

Which exception may be caused by missing service registrations?

The service provider validation completely skips over the open generic registration, so it never detects the missing DataService dependency. The app starts up without errors, and will throw a runtime exception if you try to request a ForecastService .

What are filters in Web API?

Web API includes filters to add extra logic before or after action method executes. Filters can be used to provide cross-cutting features such as logging, exception handling, performance measurement, authentication and authorization.

How do you handle exceptions in API?

To deal with exceptions, the recommended practice is to follow the sequence outlined below:

  1. Determine whether the REST API request succeeded or failed, based on the HTTP status response code returned.
  2. If the REST API request failed and the response is application/json, serialize the model.

How do I register the exception filter globally in .NET core?

The middleware UseExceptionHandler can be used to handle exceptions globally. You can get all the details of the exception object (Stack Trace, Inner exception, message etc..) and display them on-screen. You can implement like this.

What is the usage of Delegatinghandler?

In a message handler, a series of message handlers are chained together. The first handler receives an HTTP request, does some processing, and gives the request to the next handler. At some point, the response is created and goes back up the chain. This pattern is called a delegating handler.

Should I use transient or scoped?

Use Transient lifetime for the lightweight service with little or no state. Scoped services service is the better option when you want to maintain state within a request. Singletons are created only once and not destroyed until the end of the Application. Any memory leaks in these services will build up over time.

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