Extend API around AddStandardResilienceHandler, so it provides access to IServiceProvider.

[StasPerekrestov]

The Microsoft.Extensions.Http.Polly library provides an overload of .AddPolicyHandler(I) that allows access to IServiceProvider.

public static IHttpClientBuilder AddPolicyHandler(
            this IHttpClientBuilder builder,
            Func<IServiceProvider, HttpRequestMessage, IAsyncPolicy<HttpResponseMessage>> policySelector)
        {
         //......
        }

I've been thinking, wouldn't it be helpful to extend the new resilience API, so it'll be possible to do something like the following

services.AddHttpClient(...)
.AddStandardResilienceHandler(options => { 
	options.Retry.OnRetry = onRetryArguments =>
	{
                 onRetryArguments.Context.Properties.TryGetValue<IServiceProvider>("somekey", out IServiceProvider sp);
                 var logger = sp.GetRequiredService<ILogger<...>>();
		 logger.Trace("Retry attempt {AttemptNumber} to {Url}", onRetryArguments.AttemptNumber, url);
		return ValueTask.CompletedTask;
	};
 });

Thank you.

[StasPerekrestov]

It looks like there is a workaround:

services
    .AddHttpClient("dummy")
    .AddStandardResilienceHandler()
    .Configure((options, serviceProvider) =>
    {
        // configure options here
    });