ASP.NET MVC 中的 post 数据中的响应数据为空

Question

我向 API 发送了一个请求，我得到了空值，但是当我大摇大摆地执行相同的 API 时，我得到了结果。

下面是我的 ASP.NET 代码：

HttpClient client = new HttpClient();

var data = new
            {
                test = "mydata"
            };

client.BaseAddress = new Uri("weburl.com");
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));

using (client)
{
    HttpResponseMessage res = await client.PostAsJsonAsync("api/test", data);

    if (res.ReasonPhrase == "OK")
    {
        res.EnsureSuccessStatusCode();

        if (res.IsSuccessStatusCode)
        {
            var resualt = res.Content;
            var res2 = await resualt.ReadAsStringAsync();
            var json = JsonConvert.DeserializeObject<JsonModelApi>(res2);

            if (json.Succeed)
            {
                return json.Result;
            }
            else 
                return null;
        }
        else 
            return null;
    }
    else 
        return null;
}

HttpResponseMessage res = await client.PostAsJsonAsync("api/test", data);

分辨率输出：

{StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.StreamContent, Headers: { Vary: Accept-Encoding Protect: SA Date: Sun, 02 Sep 2018 11:20:16 GMT Set-Cookie: __cfduid=dd54b1f82b2eb402e21bae199246157631535887216; expires=Mon, 02-Sep-19 11:20:16 GMT; path=/; domain=.myweb; HttpOnly X-Powered-By: Huricane 11 X-Powered-By: ASP.NET Server: cloudflare CF-RAY: 453f961cb483bead-FRA Connection: keep-alive Content-Length: 0 }}

有人可以帮我吗？

谢谢。

Answer 1

我用这段代码解决了这个问题：

            client.BaseAddress = new Uri("mywebapi");
            client.DefaultRequestHeaders.UserAgent.ParseAdd("Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0");
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));

通过向 HttpClient 添加用户代理，我可以生成内容：

            client.DefaultRequestHeaders.UserAgent.ParseAdd("Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0");

Answer 2

尝试这可能是它的工作:

var data = await MobileService.Client.InvokeApiAsync<RETURN TYPE, SEND_TYPE>($"api/test", 
HttpMethod_TYPE, null);