Flurl implementation of Scott Hanselman's SimpleCastClient https://www.hanselman.com/blog/HttpClientFactoryForTypedHttpClientInstancesInASPNETCore21.aspx

FlurlSimpleCastClient.cs

// Do this in Startup. All calls to SimpleCast will use the same HttpClient instance.
FlurlHttp.ConfigureClient(Configuration["SimpleCastServiceUri"], cli => cli
    .Configure(settings =>
    {
        // keeps logging & error handling out of SimpleCastClient
        settings.BeforeCall = call => logger.LogWarning($"Calling {call.Request.RequestUri}");
        settings.OnError = call => logger.LogError($"Call to SimpleCast failed: {call.Exception}");
    })
    // adds default headers to send with every call
    .WithHeaders(new
    {
        Accept = "application/json",
        User_Agent = "MyCustomUserAgent" // Flurl will convert that underscore to a hyphen
    }));

 

using Flurl;
using Flurl.Http;

public class SimpleCastClient
{
    // look ma, no client!
    private readonly string _baseUrl;
    private readonly string _apiKey;
 
    public SimpleCastClient(IConfiguration config)
    {
        _baseUrl = config["SimpleCastServiceUri"]; 
        _apiKey = config["SimpleCastAPIKey"]; 
    }
 
    public Task<List<Show>> GetShows()
    {
        return _baseUrl
            .AppendPathSegment("v1/podcasts/shownum/episodes.json")
            .SetQueryParam("api_key", _apiKey)
            .GetJsonAsync<List<Show>>();
    }
}