Can the BaseAddress be changed after the service is injected?

[michaelakin]

Hi, I would like to change the base address on particular api endpoints that have been injected with a refit service. Is this posssilbe, or can I only do it when Getting a required service?

app.MapGet("/getip", async ([FromServices] IIpAddressApi ipApi) =>
{
    // would like to change the base address here for services like this based on something.
    Log.Information("Getting the ip address");
    var result = await ipApi.GetIp();
    return result;
}).WithName("getip");

here is the set up for that service:

builder.Services.AddRefitClient<IIpAddressApi>()
        .ConfigureHttpClient(c => c.BaseAddress = new Uri("https://ipapi.co"))
        .AddTransientHttpErrorPolicy(x =>
        x.WaitAndRetryAsync(
            Backoff.DecorrelatedJitterBackoffV2(medianFirstRetryDelay: TimeSpan.FromSeconds(2),
            retryCount: 5), onRetryAsync: async (outcome, span, retryAttempt, context) =>
            {
                Log.Logger.Warning("Delaying for {delay}ms, then making retry {retry}.", span.TotalMilliseconds, retryAttempt);
            }
        ));

and Here is the service:

using Refit;
using Our.Enterprise..Models;

namespace Our.Enterprise.Interfaces
{
    internal interface IIpAddressApi
    {
        [Headers("User-Agent: NotChrome")]
        [Get("/json")]
        public Task<IpDto> GetIp();
    }
}

[EmilAlipiev]

Have you ever found an answer for this? I only can get it working like below but this not overriding, changing, rather getting a new instance with a new url.

  private IApi GetClient()
    {
            return ClientFactory.CreateClient(apiUrl);
    }

[michaelakin]

I never got an answer and I don't remember if I could do it after injection , but here is how I did it:

Setup:

builder.Services.AddHttpClient("payment")
.AddTransientHttpErrorPolicy(x =>
x.WaitAndRetryAsync(
    Backoff.DecorrelatedJitterBackoffV2(medianFirstRetryDelay: TimeSpan.FromSeconds(1),
    retryCount: 5), onRetryAsync: async (outcome, span, retryAttempt, context) =>
    {
        Log.Logger.Warning("Delaying for {delay}ms, then making retry {retry}.", span.TotalMilliseconds, retryAttempt);
    }
))
.AddHttpMessageHandler<HttpLoggingHandler>()
.AddTypedClient<IProxyService, ProxyService>();

Injection of Http Client:

public ProxyService(
    ILogger<ProxyService> logger,
    HttpClient httpClient)
{
   _logger = logger;
   _httpClient = httpClient;

}

use in a method to set the base address

var auth = await GetAuthInfoAsync(apiGatewayStage, "payment");
if (_httpClient.BaseAddress == null)
{
    _httpClient.BaseAddress = new Uri(auth.BaseUrl);
}
var paymentApi = RestService.For<IPaymentApi>(_httpClient, GetRefitSettings());

Hopefully this helps.

[michaelakin]

I find it interesting because the generated code exposes a client where you should be able to change the base address, but it is not available for use

    partial class EnterpriseInterfacesIIpAddressApi
        : global::Enterprise.Interfaces.IIpAddressApi

    {
        /// <inheritdoc />
       public global::System.Net.Http.HttpClient Client { get; }
        readonly global::Refit.IRequestBuilder requestBuilder;

        /// <inheritdoc />
        public EnterpriseInterfacesIIpAddressApi(global::System.Net.Http.HttpClient client, global::Refit.IRequestBuilder requestBuilder)
        {
            Client = client;
            this.requestBuilder = requestBuilder;
        }

I would like to find out more why that is not available.