How to implement dependency injection in an authentication filter attribute with castle windsor in asp.net web api?

Question

I need to call a service to authenticate the headers passed with the request. I'm using windsor dependency injection, but it seems it is not possible to inject dependencies into attributes/filters?

I have pretty much googled the internet around but haven't found a clear working solution yet. Though this seems to be extremly important in most applications I wonder how u can fix this problem?

Answer 1

you need to do this on startup of your application

I am using Simple Injector but doesn't matter what lib you use

first register your filterattribute

 container.Register<JwtAuthenticationAttribute>(Lifestyle.Singleton)

then in your startup.cs file you can do the following

 config.Filters.Add(container.GetInstance<JwtAuthenticationAttribute>());

container in this context would be the container for your Castle Windosor initialization and registration of your services