The Open Web Interface for .NET, also known as OWIN, defines a standard interface between .NET web servers and web applications. Katana is an open-source component to build and host OWIN-based web applications. With its help, the implementation of the OWIN specification takes place. Moreover, the authorization framework still needs to be enabled by a third-party application to obtain limited access for an HTTP service, but it can be done very easily.
These days the preferred approach to authenticate by the users is by using a signed token. This token is sent to the server with each request & then it is processed. The reason why this approach is so common nowadays is because of its benefits. Some of the benefits of using this approach are: –
- Scalability of Servers
The token we get in this approach contains all the user information needed for the authentication, which makes this approach one of the most simplistic for Web Farm extension. There is no dependence on shared session stores.
- Loosely Coupling
The front-end application is not coupled with a specific authentication mechanism, making it less time-consuming. Whenever the token is generated from the server. The web API has to understand this token and perform authentication.
- •Mobile Friendly
This authentication does not require any cookies from your system, which makes this authentication mobile-friendly.
The Procedure to Make this Possible
Step 1 – Create & Configure Web API Project
This is the first step of the process. In this step, we need to create an empty solution for the project template “ASP.NET Web Application”. After that, we need to add a core reference of the Web API and set the authentication to “No Authentication”.
Step 2 – Install OWIN Component Using Nuget Package
In the second step, we need to install Nuget packages to set up our OWIN server and configure the Web API. With its help, we will be able to host within the OWIN server. Moreover, the “Microsoft.AspNet.Identity.Owin” package provides many useful extensions, and we will use this while working with ASP.Net Identity on top of OWIN. It downloads some other dependency packages as well.
Step 3 – Create DB Context Class
In the third step, we need to create a Db Context class. You can easily create it by using the default entity types for ASP.NET, for example, Identity Users, Roles, Claims, and Logins. You can also overload this to add our own entity types.
Step 4 – Define an OWIN Start-up Class
Like every OWIN application, your installed version will also have a startup class in which there are some specific components for the application pipeline. Here, in this step, you need to use them. You can start by using Owin Startup Attribute to connect to the startup class with the hosting runtime.
Step 5 – Configure the Authorization Server
This is the last step of the procedure. In this, you need to create one instance of the given type per request. Here, you are going to use ASP.Net Identity with Entity Framework. And it is the essential step. So, you just need to create the instance of the Db Context class to do this by using the extension method.