Hi,
I would like to integrate Paypal with a T5 application. Previously with
JSP, I had a paypal IPN handler jsp page. After user makes a payment,
Paypal posts the payment data to my jsp page and my script checks the
data and process it. The jsp script runs in the background and is
separate from the web flow. Now in T5, what's the best way to
implement this? Should this be done by adding an empty page with an
onActive event and put the code there?
The following is the sample code for the ipn handler:
|<%@ page import="java.util.*" %>
<%@ page import="java.net.*" %>
<%@ page import="java.io.*" %>
<%
// read post from PayPal system and add 'cmd'
Enumeration en = request.getParameterNames();
String str = "cmd=_notify-validate";
while(en.hasMoreElements()){
String paramName = (String)en.nextElement();
String paramValue = request.getParameter(paramName);
str = str + "&" + paramName + "=" + URLEncoder.encode(paramValue);
}
// post back to PayPal system to validate
// NOTE: change http: to https: in the following URL to verify using SSL
(for increased security).
// using HTTPS requires either Java 1.4 or greater, or Java Secure
Socket Extension (JSSE)
// and configured for older versions.
URL u = new URL("http://www.paypal.com/cgi-bin/webscr";);
URLConnection uc = u.openConnection();
uc.setDoOutput(true);
uc.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
PrintWriter pw = new PrintWriter(uc.getOutputStream());
pw.println(str);
pw.close();
BufferedReader in = new BufferedReader(
new InputStreamReader(uc.getInputStream()));
String res = in.readLine();
in.close();
// assign posted variables to local variables
String itemName = request.getParameter("item_name");
String itemNumber = request.getParameter("item_number");
String paymentStatus = request.getParameter("payment_status");
String paymentAmount = request.getParameter("mc_gross");
String paymentCurrency = request.getParameter("mc_currency");
String txnId = request.getParameter("txn_id");
String receiverEmail = request.getParameter("receiver_email");
String payerEmail = request.getParameter("payer_email");
check notification validation
if(res.equals("VERIFIED")) {
// check that paymentStatus=Completed
// check that txnId has not been previously processed
// check that receiverEmail is your Primary PayPal email
// check that paymentAmount/paymentCurrency are correct
// process payment
}
else if(res.equals("INVALID")) {
// log for investigation
}
else {
// error
}
%>|
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