Question

我试图从HTTP请求获得响应，但我似乎无法做到。我尝试过以下方法：

public Form1() {     

    HttpClient client = new HttpClient();
    client.BaseAddress = new Uri("someUrl");
    string content = "someJsonString";
    HttpRequestMessage sendRequest = new HttpRequestMessage(HttpMethod.Post, client.BaseAddress);
    sendRequest.Content = new StringContent(content,
                                            Encoding.UTF8,
                                            "application/json");

发送消息：

    ...
    client.SendAsync(sendRequest).ContinueWith(responseTask =>
    {
        Console.WriteLine("Response: {0}", responseTask.Result);
    });
} // end public Form1()

使用此代码，我会返回状态代码和一些标题信息，但我不会自己回复响应。我也试过了：

  HttpResponseMessage response = await client.SendAsync(sendRequest);

但我告诉我要创建一个如下所示的异步方法以使其正常工作

private async Task<string> send(HttpClient client, HttpRequestMessage msg)
{
    HttpResponseMessage response = await client.SendAsync(msg);
    string rep = await response.Content.ReadAsStringAsync();
}

这是发送＆＃39; HttpRequest＆＃39;的首选方式，获取并打印回复？我不确定哪种方法是正确的。

Answer 1

这是一种使用HttpClient的方法，如果请求返回状态为200，则应该读取请求的响应（请求不是BadRequest或NotAuthorized）

string url = 'your url here';

using (HttpClient client = new HttpClient())
{
     using (HttpResponseMessage response = client.GetAsync(url).Result)
     {
          using (HttpContent content = response.Content)
          {
              var json = content.ReadAsStringAsync().Result;
          }
     }
}

有关详细信息以及如何将async/await与HttpClient一起使用，您可以阅读this answer

的详细信息

如何从Httpclient.SendAsync调用

1 个答案: