Set request's header on Authorize Attribute of the Controller in Asp.net Core Web API

Question

I want to set the header request before checking the auhorization, but i'm looking for the event to execute the modification. This my Implementation of IAuthorizationFilter :

public class MyAuthorizationFilter : IAuthorizationFilter
    {  

        public MyAuthorizationFilter()
        {
        }

        public void OnAuthorization(AuthorizationFilterContext context)
        {
        }
    }

This is my code in Startup :

services.AddMvc(options =>
            {
                options.Filters.Add(typeof(ClaimRequirementFilter));
            });

This is my call of MyAuthorizationFilter in the controller :

 [MyAuthorizationFilter()]
    public class AccountController : BaseController
    {
    }

ClaimRequirementFilter -> do you want to add a global auth requirement? — abdusco
– abdusco, Commented Jul 27, 2021 at 16:44
set the header request before checking the auhorization? How do you mean? — abdusco
– abdusco, Commented Jul 27, 2021 at 16:49
@abdusco No, I don't want to add a global auth requierement. I mean when a request is recieved to the controller, the authorize attribute will check the validity of the the JWT bearer token. i want to set the request's header before authorize attribute start checking the validty — Ismail Fedaoui
– Ismail Fedaoui, Commented Jul 27, 2021 at 21:39
You don't need filters to validate JWT. You need to add a JWT auth scheme services.AddAuthentication().AddJwtBearer() then enable auth middleware app.UseAuthentication().UseAuthorization() which will validate the token for you — abdusco
– abdusco, Commented Jul 27, 2021 at 22:02
@abdusco Yes i've already added this, but i want to edit the request before my app start checking jwt token validation. — Ismail Fedaoui
– Ismail Fedaoui, Commented Jul 28, 2021 at 8:57

abdusco · Accepted Answer · 2021-07-28 10:47:51Z

3

To modify the request, add a middleware before the auth middleware:

app.UseRouting();

// add a middleware before auth
app.Use(
    async (context, next) => {
        // modify the request
        context.Request.Headers["A"] = "1";
        // call the next middleware
        await next();
    }
);

app.UseAuthentication();
app.UseAuthorization();

app.UseEndpoints(...);

edited Jul 28, 2021 at 10:47

answered Jul 28, 2021 at 9:27

abdusco

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