Paypal 通过 C# 中的 400 Bad Request 错误保存了卡余 API

Posted 2023-02-22

【中文标题】Paypal 通过 C# 中的 400 Bad Request 错误保存了卡余 API

【英文标题】：Paypal saved card rest API through 400 Bad Request error in C#

【发布时间】：2016-10-11 07:49:25

【问题描述】：

我正在使用 .net MVC C# 开发应用程序。我试图调用 PayPal 的 rest API 来保存信用卡详细信息，我的代码工作正常，但突然从 400 Bad Request 异常开始。这是我的代码，

private static async Task<string> StorePaymentCards(string accessToken, PaymentInfoModel cardDetails)
    
        try
        
            var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://api.sandbox.paypal.com/v1/vault/credit-card");
            var result = "";
            httpWebRequest.ContentType = "application/json; charset=utf-8";
            httpWebRequest.Method = "POST";
            httpWebRequest.Accept = "application/json; charset=utf-8";
            httpWebRequest.Headers.Add("Authorization", "Bearer " + accessToken);

            using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
            
                var loginjson = new javascriptSerializer().Serialize(new
                
                    payer_id = cardDetails.PayerId.Trim(),
                    type = cardDetails.CardType.Trim(),
                    number = cardDetails.CardNumber.Trim(),
                    expire_month = cardDetails.ExpireMonth.Trim(),
                    expire_year = cardDetails.ExpireYear.Trim(),
                    first_name = cardDetails.FirstName.Trim()
                );

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

                //The code fails when creating the Response here, and go into catch block
                var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
                using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
                
                    result = streamReader.ReadToEnd();
                
                return result;
            

        

        catch (Exception ex)
        
            return ex.GetBaseException().Message;
        
    

谁能帮我解决这个错误？ 提前谢谢你。

【问题讨论】：

调试代码并发布完整的异常消息。错误的请求可能意味着很多不同的场景。检查异常的所有属性以获取更具体的消息

@cFrozenDeath，感谢您的回复，这是我收到的例外情况。 System.Net.WebException：远程服务器返回错误：（400）错误请求。在 System.Net.HttpWebRequest.GetResponse()

信息还不够。异常（catch 块内的前对象）应该有更多的细节。

@cFrozenDeath，我弄错了，我没有输入正确的卡详细信息，因此引发了 400 异常。感谢您的及时回复。

【参考方案1】：

 private static async Task<string> StorePaymentCards(string accessToken, PaymentInfoModel cardDetails)
    
        try
        
          //my stuff
        
        catch (WebException ex)
        
            string text = null;
            using (WebResponse response = ex.Response)
            
                HttpWebResponse httpResponse = (HttpWebResponse)response;
                Console.WriteLine("Error code: 0", httpResponse.StatusCode);
                using (Stream data = response.GetResponseStream())
                using (var reader = new StreamReader(data))
                
                    text = reader.ReadToEnd();
                    Console.WriteLine(text);
                
            
            return text; //ex.GetBaseException().Message;
        
    

这是我在 catch 块中所做的更改以跟踪正确的错误，因此它返回了我所面临的错误。