在.net core 5应用程序中调用外部api

Question

我为公共假期创建了一个 Web API 应用程序。

这是类 Pho

public class Pho
{
    public DateTime date { get; set; }
    public string localName { get; set; }
    public string countryCode { get; set; }
}

这里是我尝试调用 API 的代码

using (var client = new HttpClient())
{
    client.BaseAddress = new Uri("https://date.nager.at/api/v3/PublicHolidays/2017/FR");
    using (HttpResponseMessage response = await client.GetAsync(""))
    {
        var responseContent = response.Content.ReadAsStringAsync().Result;
        response.EnsureSuccessStatusCode();
        return Ok(responseContent);
    }
}

它不起作用，我不知道如何修复它

Answer 1

尝试修复 uri

client.BaseAddress = new Uri("https://date.nager.at"); 
using (HttpResponseMessage response = await client.GetAsync("/api/v3/PublicHolidays/2017/FR"))
{
   if (response.IsSuccessStatusCode)
   {
    var responseContent = await response.Content.ReadAsStringAsync();
     return Ok(responseContent);
    }
return BadRequest("status code "+response.StatusCode.ToString());   
}           
                

Answer 2

您的代码无法正常工作的可能原因之一是您尝试在客户端尚未初始化时设置 BaseAddress。

要在初始化 HttpClient 时添加 BaseAddress，您应该这样做：

   var client = new HttpClient
            {
                BaseAddress = new Uri("https://date.nager.at/api/v3/PublicHolidays/2017/FR")
            };
            
            using (HttpResponseMessage response = await client.GetAsync(client.BaseAddress))
            {
                    var responseContent = response.Content.ReadAsStringAsync().Result;
                    response.EnsureSuccessStatusCode();
                    return Ok(responseContent);
            }