.net-core - AddHttpClient 配置的 HttpClient.Timeout 被忽略

Question

当使用推荐的 AddHttpClient 扩展来配置 IHttpClientFactory 并包括一些默认的 HttpClient 设置时，我为 设置的值在我随后创建的 HttpClient 实例中看不到 Timeout 属性。

Demo 使用 Azure Function，类似于 ASP.NET Core。

public class Startup : FunctionsStartup
{
    public static readonly int PushTimeoutMs = 3000;

    public override void Configure(IFunctionsHostBuilder builder)
    {
        builder.Services.AddHttpClient("PushNotification", client =>
        {
            client.Timeout = TimeSpan.FromMilliseconds(PushTimeoutMs);
        });
    }
}

创建客户端。

public class TestFunctionTwo
{
    public TestFunctionTwo(IHttpClientFactory httpClientFactory)
    {
        this.HttpClientFactory = httpClientFactory;
    }

    //

    public IHttpClientFactory HttpClientFactory { get; }

    //

    [FunctionName("TestFunctionTwo")]
    public async Task<IActionResult> Run(
        [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequest req,
        ILogger log)
    {
        await Task.Delay(100);

        return new OkObjectResult($"OK - Timeout: {this.HttpClientFactory.CreateClient().Timeout.TotalMilliseconds}");
    }
}

返回

OK - Timeout: 100000

Answer 1

这是因为您需要创建一个与您配置的名称相同的 HttpClient，即 "PushNotification"。

return new OkObjectResult($"OK - Timeout: {this.HttpClientFactory.CreateClient("PushNotification").Timeout.TotalMilliseconds}");