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Discussion on: .NET Core: Use HttpClientFactory and Polly to build rock solid services

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dimaaan profile image
Dmitry Anshilevich • • Edited

Though Polly provides it out-of-the-box with reasonable defaults, you don't need 3rd party libraries to reuse retry logic with HttpClient.
Just extract it to DelegatingHandler

public class RetryHandler : DelegatingHandler
{
    protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request,
        CancellationToken cancellationToken)
    {
        /* your retry logic ... */
    }
}
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and then add it to DI:

services.AddHttpClient(/*...*/).AddHttpMessageHandler<RetryHandler>();
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rickystam profile image
Ricky Stam •

Hi Dmitry,

Thank you very much for your comment, it is a very nice addition to the post.
It is always nice to have more options on the table!

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Daniel Lidström •

One advantage with Polly is that you can also enable ChaosMonkey (Simmy in Polly terms). I do this for all Polly policies and activate it for development only. Great way to test your resilience.