使用应用程序/八位字节流进行 POST 调用

Question

嗨，我正在尝试触发对以下API的 POST 调用。这是代码

var client = new HttpClient();

client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/octet-stream"));
client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", key);

var queryString = HttpUtility.ParseQueryString(string.Empty);
queryString["returnFaceId"] = "true";
queryString["returnFaceLandmarks"] = "false";
queryString["returnFaceAttributes"] = "age,gender";

var filebytes = File.ReadAllBytes(@"C:\Users\user1\Desktop\IMG.jpg");

var uri = "https://southeastasia.api.cognitive.microsoft.com/face/v1.0/detect?" + queryString;

HttpResponseMessage response;


using (var content = new ByteArrayContent(filebytes))
{
    response = client.PostAsync(uri, content).Result;
    var result = response.Content.ReadAsStringAsync().Result;
}

我收到以下错误result：

{"error":{"code":"BadArgument","message":"JSON parsing error."}}

如果我使用application/json, 并传递 http 链接，则此代码工作正常。

Answer 1

作为微软给出的示例代码，您可以尝试ContentType像示例一样设置：

using (var content = new ByteArrayContent(byteData))
{
     content.Headers.ContentType = new MediaTypeHeaderValue("< your content type, i.e. application/json >");
     response = await client.PostAsync(uri, content);
}