Configure OidcProviderOptions using IConfiguration on Blazor Wasm

IConfiguration can’t be used when configuring the host builder

There is no way to configure AddOidcAuthentication using the IConfiguration of blazor wasm

            var builder = WebAssemblyHostBuilder.CreateDefault(args);
            builder.RootComponents.Add<App>("app");

            builder.Services.AddBaseAddressHttpClient();
            builder.Services.AddOidcAuthentication(options =>
            {
                options.ProviderOptions.Authority = "https://demo.identityserver.io";
                options.ProviderOptions.ClientId = "interactive.public";
                options.ProviderOptions.DefaultScopes.Add("api");
                options.ProviderOptions.ResponseType = "code";
            });

Ideally we need the IConfiguration information to put this configuration values on appsettings.json or appsettings.development.json etc but right now the only way is hardcoded this parameters on the Program.cs

Further technical details

• Blazor Wasm 3.2.0-preview3.20168.3

[MichaelSpranger]

I realized that I am able to access the configuration like so. I use builder.Services.AddMsalAuthentication, but I expect this to work the same with AddOidcAuthentication.

            builder.Services.AddMsalAuthentication(options =>
            {
                var configuration = builder.Services.BuildServiceProvider().GetRequiredService<IConfiguration>();
...
            });

[pranavkm]

I can look at fixing the issue @dibble-james ran in to where building the IConfigurationBuilder twice fails. Do we want to do anything specific for blazor-wasm to allow reading config without having to construct it? For instance, we could expose a FooConfigurationBuilder : IConfigurationBuilder, IConfiguration off of the host builder.