自定义配置HttpClient

完全封装 HttpClient

1. 自定义 HttpClientFactory 请求类

public interface ISampleClient
{
    Task<string> GetData();
}

public class SampleClient : ISampleClient
{
    private readonly HttpClient _client;

    public SampleClient(HttpClient httpClient)
    {
        httpClient.BaseAddress = new Uri("https://api.SampleClient.com/");
        httpClient.DefaultRequestHeaders.Add("Accept", "application/json");
        httpClient.DefaultRequestHeaders.Add("User-Agent", "HttpClientFactory-Sample");
        _client = httpClient;
    }

    public async Task<string> GetData()
    {
        return await _client.GetStringAsync("/");
    }
}

2. 在Startup.cs中ConfigureService方法中注册SampleClient

services.AddHttpClient<ISampleClient, SampleClient>();

3. 从容器获取实例

public class ValuesController : Controller
{
    private readonly ISampleClient  _sampleClient;;

    public ValuesController(ISampleClient  sampleClient)
    {
        _sampleClient = sampleClient;
    }

    [HttpGet]
    public async Task<ActionResult> Get()
    {
        string result = await _sampleClient.GetData();
        return Ok(result);
    }
}