PayPal IPN Response
- by Gorkem Tolan
I am having a problem with PayPal IPN response. After payment is made by the customer, PayPal IPN returns this URL:
www.mywebsite.com?orderid=32&tx=2AC67201DL3533325&st=Pending&amt=2.50&cc=USD&cm=&item_number=32
There are a couple of issues
Post-back field names are undefined or missing. Thus I can get the INVALID message. I am not sure if my website does not read POST variables. When I looked at IPN history, it shows that each IPN has been sent with the complete url.
Payment status keeps coming Pending. Does this issue cause the first issue?
Thank you for your responses in advance.
Here is the code:
Dim strSandbox As String, strLive As String
Dim req As HttpWebRequest
strSandbox = "http://www.sandbox.paypal.com/cgi-bin/webscr/"
strLive = "https://www.paypal.com/cgi-bin/webscr"
req = CType(WebRequest.Create(strSandbox), HttpWebRequest)
'Set values for the request back
req.Method = "POST"
req.ContentType = "application/x-www-form-urlencoded"
Dim param() As Byte
param = Request.BinaryRead(HttpContext.Current.Request.ContentLength)
Dim strRequest As String
strRequest = Encoding.ASCII.GetString(param)
strRequest = strRequest & "&cmd=_notify-validate"
req.ContentLength = strRequest.Length
'Response.Write(strRequest)
'Send the request to PayPal and get the response
Dim streamOut As StreamWriter
streamOut = New StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII)
streamOut.Write(strRequest)
streamOut.Close()
Dim streamIn As StreamReader
streamIn = New StreamReader(req.GetResponse().GetResponseStream())
Dim strResponse As String
strResponse = streamIn.ReadToEnd()
Response.Write(strResponse)
streamIn.Close()
If (strResponse = "VERIFIED") Then
Response.Redirect("thankyou.aspx")
ElseIf (strResponse = "INVALID") Then
End If
