Null value when running a Identity Server method

Question

I'm trying to setup a very simple OpenIddict project, but I'm having a lot of problems and questions to make it run.

My project have included just OpenIddict.AspNetCore library and is using Net6. The code is just:

using Microsoft.AspNetCore;
using OpenIddict.Abstractions;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddOpenIddict()
    .AddServer(options =>
    {
        options
            .AllowAuthorizationCodeFlow()
            .RequireProofKeyForCodeExchange();

        options
            .SetAuthorizationEndpointUris("/authorize")
            .SetTokenEndpointUris("/token");

        options
            .UseAspNetCore()
            .EnableTokenEndpointPassthrough()
            .EnableAuthorizationEndpointPassthrough();

        options.EnableDegradedMode(); //To suppress calls to the DB
    });

var app = builder.Build();

if (!app.Environment.IsDevelopment())
{
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.MapGet("/authorize", async (HttpContext context) =>
{
    var request = context.GetOpenIddictServerRequest();
    if (request != null && request.IsAuthorizationCodeFlow())
    {
        await context.Response.WriteAsync("Call to /authorize received");
    }
    throw new Exception("Invalid request");
});

app.UseRouting();

app.Run();

When I run this, the request variable in my /authorize delegate is always null.

Also, I expect to have the endpoint .well-known/openid-configuration, but it returns 404.

I don't want to include EF yet, because I prefer to see the working flow first (And could be another Db implementation than EF). And, this is a recurrent problem in the basic examples: they have too much implementation details that make very hard to find the bare flows for a IdentityServer.

My objective is just to have the Auth Code flow.

Answer 1

To fix the null request variable and the 404 error for the OpenID configuration endpoint:

1. Ensure OpenIddict middleware is invoked correctly by adding app.UseAuthentication() and app.UseAuthorization() before app.UseRouting().
2. Configure the OpenID configuration endpoint using SetIssuer() method in OpenIddict server options.