如果数据库更新失败,Paypal 回滚/退款 IPN?
Paypal Rollback / Refund IPN if database update fails?
我想知道我应该如何处理这样一种情况:客户收到了数字商品的账单,然后调用了 IPN,我交付了数字商品。如果在交付过程中出现问题怎么办?这个案子应该怎么处理?在这种情况下,我可以做些什么来取消/退款吗?
我的 ipn 代码基于我找到的样本
protected void Page_Load(object sender, EventArgs e)
{
//Post back to either sandbox or live
string strSandbox = "https://www.sandbox.paypal.com/cgi-bin/webscr";
// string strLive = "https://www.paypal.com/cgi-bin/webscr";
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(strSandbox);
//Set values for the request back
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
byte[] param = Request.BinaryRead(HttpContext.Current.Request.ContentLength);
string strRequest = Encoding.ASCII.GetString(param);
strRequest += "&cmd=_notify-validate";
req.ContentLength = strRequest.Length;
//for proxy
//WebProxy proxy = new WebProxy(new Uri("http://url:port#"));
//req.Proxy = proxy;
//Send the request to PayPal and get the response
StreamWriter streamOut = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII);
streamOut.Write(strRequest);
streamOut.Close();
StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream());
string strResponse = streamIn.ReadToEnd();
streamIn.Close();
if (strResponse == "VERIFIED")
{
//UPDATE YOUR DATABASE
//check the payment_status is Completed
//check that txn_id has not been previously processed
//check that receiver_email is your Primary PayPal email
//check that payment_amount/payment_currency are correct
//process payment
}
else if (strResponse == "INVALID")
{
//UPDATE YOUR DATABASE
}
else
{ //UPDATE YOUR DATABASE
}
}
如果我更新数据库失败怎么办?
首先,我会确保使用干净的 SQL 语句,这样就不会发生数据库错误。如果数据库连接错误,您可以 return 500 响应,PayPal 的 IPN 系统将继续重试,直到收到成功的 200 OK 响应。
如果您确实希望根据脚本中的任何失败提交退款,您可以通过 RefundTransaction API.
我想知道我应该如何处理这样一种情况:客户收到了数字商品的账单,然后调用了 IPN,我交付了数字商品。如果在交付过程中出现问题怎么办?这个案子应该怎么处理?在这种情况下,我可以做些什么来取消/退款吗?
我的 ipn 代码基于我找到的样本
protected void Page_Load(object sender, EventArgs e)
{
//Post back to either sandbox or live
string strSandbox = "https://www.sandbox.paypal.com/cgi-bin/webscr";
// string strLive = "https://www.paypal.com/cgi-bin/webscr";
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(strSandbox);
//Set values for the request back
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
byte[] param = Request.BinaryRead(HttpContext.Current.Request.ContentLength);
string strRequest = Encoding.ASCII.GetString(param);
strRequest += "&cmd=_notify-validate";
req.ContentLength = strRequest.Length;
//for proxy
//WebProxy proxy = new WebProxy(new Uri("http://url:port#"));
//req.Proxy = proxy;
//Send the request to PayPal and get the response
StreamWriter streamOut = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII);
streamOut.Write(strRequest);
streamOut.Close();
StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream());
string strResponse = streamIn.ReadToEnd();
streamIn.Close();
if (strResponse == "VERIFIED")
{
//UPDATE YOUR DATABASE
//check the payment_status is Completed
//check that txn_id has not been previously processed
//check that receiver_email is your Primary PayPal email
//check that payment_amount/payment_currency are correct
//process payment
}
else if (strResponse == "INVALID")
{
//UPDATE YOUR DATABASE
}
else
{ //UPDATE YOUR DATABASE
}
}
如果我更新数据库失败怎么办?
首先,我会确保使用干净的 SQL 语句,这样就不会发生数据库错误。如果数据库连接错误,您可以 return 500 响应,PayPal 的 IPN 系统将继续重试,直到收到成功的 200 OK 响应。
如果您确实希望根据脚本中的任何失败提交退款,您可以通过 RefundTransaction API.