How do I configure CORS and authentication in ASP.NET Core?

How do I configure CORS and authentication in ASP.NET Core?

To configure CORS in ASP.NET Core, you need to add the CORS services in the Startup.cs file. You can do this in the ConfigureServices method by calling services.AddCors(). Then, you can define your CORS policy.

What does a CORS policy look like?

A simple CORS policy might look like this: services.AddCors(options => { options.AddPolicy("AllowAll", builder => { builder.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader(); }); }); You can customize it based on your needs.

How do I apply this CORS policy to my controllers?

You can apply the CORS policy by using the [EnableCors("AllowAll")] attribute on your controllers or actions. Alternatively, you can use app.UseCors("AllowAll"); in the Configure method.

What about authentication? How do I set that up?

For authentication, you can use JWT tokens. First, add the necessary NuGet packages, then configure JWT in the ConfigureServices method and set up the authentication middleware in the Configure method.