Sending requests inside the handler

[smolchanovsky]

Sometimes it becomes necessary to send additional requests in the handler, for example, to process 4** response codes. Here is an example of how it can be used in the system HttpClient. It is necessary to make the same feature in the NClient.

A workaround that can be used now:

public void ConfigureServices(IServiceCollection services)
{
    services.AddRestNClient<IMyClient>()
        .AddHttpMessageHandler<AuthHeaderHandler>();
}

you can add HttpClient's system handlers.