How can i invoke X-HttpMessageHandlers when retrying requests?

In short: I want to execute X-HttpMessageHandlers when retrying a request.

Implementation: Currently, I have added an HttpClient, whose request gets handled by a Logging- and a PolicyHandler:

using Microsoft.Extensions.Http.Pollybuilder.Services.AddHttpClient()    .AddHttpMessageHandler<LoggingHandler>()    .AddPolicyHandler(GetRetryPolicy());

Policy: To keep the policy very simple, let's use an example:

public static IAsyncPolicy<HttpResponseMessage> GetRetryPolicy(){    // HandleTransientHttpError: Handles HttpRequestException,     // Http status codes >= 500 (server errors)     // and status code 408 (request timeout)    return HttpPolicyExtensions        .HandleTransientHttpError()        .RetryAsync(3); // Retry the request up to 3 times}

In case you want to test out the retry policy, send requests to: https://httpbin.org/status/503.

The above link will return an unsuccessful HttpResponseMessage with a status code 502, aka Bad Gateway. This response type is a server error, so it will get handled by the policy.

Sources:

• Polly:https://github.com/App-vNext/Polly.Extensions.Http/blob/master/README.md
• HttpBin:https://httpbin.org/