How do I register a Web API filter?

To apply the filter to all Web API controllers, add it to GlobalConfiguration. Filters. public static class WebApiConfig { public static void Register(HttpConfiguration config) { config. Filters.

What is Web API filter?

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 I use authorization filter in Web API?

Web API provides a built-in authorization filter, AuthorizeAttribute. This filter checks whether the user is authenticated. If not, it returns HTTP status code 401 (Unauthorized), without invoking the action. You can apply the filter globally, at the controller level, or at the level of individual actions.

What are the action filters in Web API?

Action filters contain logic that is executed before and after a controller action executes. You can use an action filter, for instance, to modify the view data that a controller action returns. Result filters contain logic that is executed before and after a view result is executed.

How can you handle errors in Web API?

You can customize how Web API handles exceptions by writing an exception filter. An exception filter is executed when a controller method throws any unhandled exception that is not an HttpResponseException exception.

Who can consume Web API?

Almost any native application running on a mobile device other than the Windows one can use ASP.NET Web API as backend. Hence, a web API is good for using with native applications which require web services but not SOAP support.

Can we return view from Web API?

You don’t. You can return one or the other, not both. Frankly, a WebAPI controller returns nothing but data, never a view page. A MVC controller returns view pages.

How do I pass body parameters in Web API?

You can pass parameters to Web API controller methods using either the [FromBody] or the [FromUri] attributes. Note that the [FromBody] attribute can be used only once in the parameter list of a method.

What is use of FromBody in Web API?

Using [FromBody] When a parameter has [FromBody], Web API uses the Content-Type header to select a formatter. In this example, the content type is “application/json” and the request body is a raw JSON string (not a JSON object). At most one parameter is allowed to read from the message body.

How are filters used in the web API?

Filters can be used to provide cross-cutting features such as logging, exception handling, performance measurement, authentication and authorization. Filters are actually attributes that can be applied on the Web API controller or one or more action methods.

How to add global ASP.NET Web API filters?

GlobalConfiguration.Configuration.Filters.Add (new MyWebApiFilter ()); Mvc global filters are registered by way of a GlobalFilterCollection object, which is available to you through the RegisterGlobalFilters method of FilterConfig.cs for projects that are using WebActivator:

How to secure ASP.NET Web APIs using authorization filters?

When you need to transmit data over the wire, you should be aware of the various tools you can use to secure that data. ASP.Net Web API is a lightweight framework used for building stateless RESTful services that run on HTTP. One way to secure Web API services is with authorization filters.

Why are MVC and web API filters not cross compatible?

Short answer: MVC and Web API filters are not cross compatible, and if you want to register them globally, you must use the appropriate configuration classes for each. Long answer: ASP.NET MVC and Web API are purposely designed to work in a similar way, but they are in fact different creatures.