Question

我想将json数据发布到web服务。

以下是方法：

public static Int32 SaveCashSale(string username, string key, CashSale cashSale)
{
    try
    {

        // Customize URL according to geo location parameters
        var url = string.Format(cashSaleUrl, username, key);

        var httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
        httpWebRequest.ContentType = "application/json";
        httpWebRequest.Method = "POST";


        using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
        {
            string jsonData = new JavaScriptSerializer().Serialize(new
            {
                activity_date = cashSale.activity_date = DateTime.Now.ToString(),
                added_by = cashSale.added_by,
                amount_paid = cashSale.amount_paid,
                balance = cashSale.balance,
                currency = cashSale.currency,
                customer = cashSale.customer,
                grand_total = cashSale.grand_total,
            });

            streamWriter.Write(jsonData);
            streamWriter.Flush();
            streamWriter.Close();

            var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();

            using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
            {
                var result = streamReader.ReadToEnd();
            }

        }

    }
    catch (WebException ex)
    {
        using (WebResponse response = ex.Response)
        {
            var httpResponse = (HttpWebResponse)response;

            using (Stream data = response.GetResponseStream())
            {
                StreamReader sr = new StreamReader(data);
                throw new Exception(sr.ReadToEnd());
            }
        }
    }
    catch (Exception)
    {

        throw;
    }
}

系统出现以下错误消息： 远程服务器返回错误（401）未经授权。

在这行代码中：

var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();

url fomrmat是：

private const string cashSaleUrl = "http://avaris.kwekud.com/api/v1/sales/cashsale/?username={0}&api_key={1}&format=json";

为什么会出错，我该如何解决？

Answer 1

您应该为您的请求添加凭据。

类似的东西（只是示例 - 这将使用默认凭据）：

 httpWebRequest.UseDefaultCredentials = true;
 httpWebRequest.PreAuthenticate = true;
 httpWebRequest.Credentials = CredentialCache.DefaultCredentials;

httpResponse 401未经授权

1 个答案: