Asp.Net Core2.1前后使用HttpClient的兩種方式

 services.AddHttpClient();

[Route("api/[controller]")]
[ApiController]
public class HttpClientController : ControllerBase
{
 IHttpClientFactory _httpClientFactory;

 public HttpClientController(IHttpClientFactory httpClientFactory)
 {
 _httpClientFactory = httpClientFactory;
 }

 [HttpGet]
 [Route(nameof(Index))]
 public async Task<IActionResult> Index()
 {
 var client = _httpClientFactory.CreateClient();
 var result = await client.GetAsync("http://aspnetcore.online/api/resource/getresource");
 return Ok(result);
 }
}