Question

我正在尝试设置PayPal来处理付款。一切正常，但是当我的IPN没有向PayPal发送验证消息时，付款没有被取消。据我所知，如果IPN没有验证付款，那么该交易应该被取消。代码看起来像这样：

[HttpPost]
public IActionResult Receive()
{
    //Store the IPN received from PayPal
    LogRequest(Request);

    Task.Run(() => VerifyTask(Request));

    //Reply back a 200 code
    return new EmptyResult();
}

private void VerifyTask(HttpRequest ipnRequest)
{
    try
    {
        VerifyIpnParamsWithException(ipnRequest);
        var verificationRequest = (HttpWebRequest)WebRequest.Create("https://www.paypal.com/cgi-bin/webscr");

        //Set values for the verification request
        verificationRequest.Method = "POST";
        verificationRequest.ContentType = "application/x-www-form-urlencoded";
        var param = ReadRequestBody(ipnRequest.Body);
        var strRequest = Encoding.ASCII.GetString(param);

        //Add cmd=_notify-validate to the payload
        strRequest = "cmd=_notify-validate&" + strRequest;
        verificationRequest.ContentLength = strRequest.Length;

        //Attach payload to the verification request
        using (var streamOut = new StreamWriter(verificationRequest.GetRequestStream(), Encoding.ASCII))
        {
            streamOut.Write(strRequest);
            streamOut.Close();
        }
        var verificationResponse = string.Empty;

        //Send the request to PayPal and get the response
        using (var streamIn = new StreamReader(verificationRequest.GetResponse().GetResponseStream()))
        {
            verificationResponse = streamIn.ReadToEnd();
            streamIn.Close();
        }
        ProcessVerificationResponse(verificationResponse);
    }
    catch (Exception exception)
    {
        DAL.LogError(exception, ipnRequest);
    }
}

当我测试它时，根据我的日志，在将验证消息发送到PayPal之前抛出了异常。它没有改变钱转移到PayPal账户并且交易完成的事实。我误会了吗？为了取消交易，还有什么我应该做的吗？

Answer 1

IPN功能是通知商家付款变动，包括;

收到付款，包括快速结账和自适应付款。
信用卡授权。
eCheck付款以及相关的待处理，已完成或已拒绝状态事件。
定期付款和订阅操作。
退款，纠纷，撤销和退款

如果您未验证发送给收听者的文本，则IPN不会取消付款。

PayPal的其他文章：https://developer.paypal.com/docs/classic/products/instant-payment-notification/

IPN验证失败时不会失败

1 个答案: