c# - 使用 .Net C# 将图像上传到 kraken.io API

Question

我对网络服务很陌生。现在我在使用 kraken.io API 来调整上传图像的大小时遇到​​问题。

请求响应时，它总是抛出异常。

任何帮助表示赞赏。非常感谢。

参考 kraken.io API 文档： https ://kraken.io/docs/upload-url

这是我到目前为止所做的

扳机：

byte[] data = new byte[fuImage.PostedFile.ContentLength];
fuImage.PostedFile.InputStream.Read(data, 0, fuImage.PostedFile.ContentLength);
objKraken krakenio = new objKraken();
krakenio.wait = true;
krakenio.resize = new objKResize() { width = Base_Controller.DealsWidth, height = Base_Controller.DealsHeight, strategy = "exact" };

Controller_Kraken.UploadFile(data, krakenio);

控制器：

public const string UploadAPIUrl = "https://api.kraken.io/v1/upload";

public static bool UploadFile(byte[] data, objKraken krakenInfo)
{
    try
    {
        HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(UploadAPIUrl);
        webRequest.Method = "POST";
        webRequest.ContentType = "multipart/form-data";
        string jsonString = JsonConvert.SerializeObject(krakenInfo);
        webRequest.ContentLength = data.Length + jsonString.Length;

        using (Stream postStream = webRequest.GetRequestStream())
        { // Send the data. 
            postStream.Write(data, 0, data.Length);
            using (StreamWriter swRequest = new StreamWriter(postStream))
            {                        
                swRequest.Write(jsonString);
                swRequest.Flush();
            }
            postStream.Close();
        }

        using (HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse())
        {
            if ((webResponse.StatusCode == HttpStatusCode.OK) && (webResponse.ContentLength > 0))
            {
                string responseText;
                using (StreamReader reader = new StreamReader(webResponse.GetResponseStream()))
                {
                    responseText = reader.ReadToEnd();
                }
                if (responseText == "true")
                { return true; }
                else
                { return false; }
            }
            else
            { return false; }
        }
    }
    catch
    { return false; }
}

目的：

public class objKraken
{
    public objKAuth auth { get { return new objKAuth(); } }
    public objKResize resize { get; set; }
    public bool wait { get; set; }
}

public class objKAuth
{
    public string api_key { get { return ConfigurationManager.AppSettings["ApiKey"]; } }
    public string api_secret { get { return ConfigurationManager.AppSettings["SecretKey"]; } }
}

public class objKResize
{
    public int width { get; set; }
    public int height { get; set; }
    public string strategy { get; set; }
}