Configuring HttpClient and IHttpClientFactory in Autofac using autofac.json

Question

I'm working on an ASP.NET project using Autofac for dependency injection, and I have a service that relies on HttpClient. I've registered IHttpClientFactory in my Startup.cs and use it to create HttpClient instances for various purposes.
I want to move the configuration of HttpClient and IHttpClientFactory to autofac.json to centralize the registration and to keep my Autofac configuration organized. However, I'm unsure of how to correctly configure HttpClient in autofac.json to utilize IHttpClientFactory.

I've registered HttpClient in my Startup.cs:

builder.Register(ctx =>
            {
                var services = new ServiceCollection();
                services.AddHttpClient();
                var provider = services.BuildServiceProvider();
                return provider.GetRequiredService<IHttpClientFactory>()
                                .CreateClient("HomeSubscriberServiceHttpClient");
            }).As<HttpClient>();

I'm looking for guidance on how to correctly configure HttpClient and IHttpClientFactory in autofac.json to achieve the desired setup. Any insights, solutions, or suggestions would be greatly appreciated.

Answer 1

I do not know accurate answer of your question, but I think the below answer can resolve your problem.

---

If you want to registration types, based on specific condition, and want to use configuration file only. you have to use Autofac Module

I add some example in https://github.com/soroshsabz/TestSolution

but for further explanation I add this example below

First of all, I write a simple module for specify conditions of dependency loading, like below

using Autofac;

namespace AutofacHandyMVCTest.Modules
{
    public class HttpModule : Module
    {
        public bool IsEnabled { get; set; }

        protected override void Load(ContainerBuilder builder)
        {
            base.Load(builder);

            if (IsEnabled)
            {
                builder.Register(ctx =>
                {
                    var services = new ServiceCollection();
                    services.AddHttpClient();
                    var provider = services.BuildServiceProvider();
                    return provider.GetRequiredService<IHttpClientFactory>()
                                    .CreateClient("HomeSubscriberServiceHttpClient");
                }).As<HttpClient>();
            }
        }
    }
}

Then I write some configuration like below

{
  "modules": [
    {
      "type": "AutofacHandyMVCTest.Modules.HttpModule, AutofacHandyMVCTest",
      "properties": {
          "IsEnabled": false
        }
    }
  ]
}

as you can see, if I want to load HttpClient I just need to make IsEnabled properties true in configuration file.