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/*
This file is part of Subsonic.
Subsonic is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Subsonic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
Copyright 2009 (C) Sindre Mehus
*/
package net.sourceforge.subsonic.backend.controller;
import org.apache.log4j.Logger;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.params.HttpConnectionParams;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.net.URLEncoder;
import java.util.Enumeration;
import java.util.Date;
import java.io.UnsupportedEncodingException;
import net.sourceforge.subsonic.backend.domain.Payment;
import net.sourceforge.subsonic.backend.dao.PaymentDao;
/**
* Processes IPNs (Instant Payment Notifications) from PayPal.
*
* @author Sindre Mehus
*/
public class IPNController implements Controller {
private static final Logger LOG = Logger.getLogger(IPNController.class);
private static final String PAYPAL_URL = "https://www.paypal.com/cgi-bin/webscr";
private PaymentDao paymentDao;
public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
try {
LOG.info("Incoming IPN from " + request.getRemoteAddr());
String url = createValidationURL(request);
if (validate(url)) {
LOG.info("Verified payment. " + url);
} else {
LOG.warn("Failed to verify payment. " + url);
}
createOrUpdatePayment(request);
return null;
} catch (Exception x) {
LOG.error("Failed to process IPN.", x);
throw x;
}
}
private String createValidationURL(HttpServletRequest request) throws UnsupportedEncodingException {
Enumeration<?> en = request.getParameterNames();
StringBuilder url = new StringBuilder(PAYPAL_URL).append("?cmd=_notify-validate");
String encoding = request.getParameter("charset");
if (encoding == null) {
encoding = "ISO-8859-1";
}
while (en.hasMoreElements()) {
String paramName = (String) en.nextElement();
String paramValue = request.getParameter(paramName);
url.append("&").append(paramName).append("=").append(URLEncoder.encode(paramValue, encoding));
}
return url.toString();
}
private void createOrUpdatePayment(HttpServletRequest request) {
String item = request.getParameter("item_number");
if (item == null) {
item = request.getParameter("item_number1");
}
String paymentStatus = request.getParameter("payment_status");
String paymentType = request.getParameter("payment_type");
int paymentAmount = Math.round(new Float(request.getParameter("mc_gross")));
String paymentCurrency = request.getParameter("mc_currency");
String txnId = request.getParameter("txn_id");
String txnType = request.getParameter("txn_type");
String payerEmail = request.getParameter("payer_email");
String payerFirstName = request.getParameter("first_name");
String payerLastName = request.getParameter("last_name");
String payerCountry = request.getParameter("address_country");
Payment payment = paymentDao.getPaymentByTransactionId(txnId);
if (payment == null) {
payment = new Payment(null, txnId, txnType, item, paymentType, paymentStatus,
paymentAmount, paymentCurrency, payerEmail, payerFirstName, payerLastName,
payerCountry, Payment.ProcessingStatus.NEW, new Date(), new Date());
paymentDao.createPayment(payment);
} else {
payment.setTransactionType(txnType);
payment.setItem(item);
payment.setPaymentType(paymentType);
payment.setPaymentStatus(paymentStatus);
payment.setPaymentAmount(paymentAmount);
payment.setPaymentCurrency(paymentCurrency);
payment.setPayerEmail(payerEmail);
payment.setPayerFirstName(payerFirstName);
payment.setPayerLastName(payerLastName);
payment.setPayerCountry(payerCountry);
payment.setLastUpdated(new Date());
paymentDao.updatePayment(payment);
}
LOG.info("Received " + payment);
}
private boolean validate(String url) throws Exception {
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 60000);
HttpConnectionParams.setSoTimeout(client.getParams(), 60000);
HttpGet method = new HttpGet(url);
String content;
try {
ResponseHandler<String> responseHandler = new BasicResponseHandler();
content = client.execute(method, responseHandler);
LOG.info("Validation result: " + content);
return "VERIFIED".equals(content);
} finally {
client.getConnectionManager().shutdown();
}
}
public void setPaymentDao(PaymentDao paymentDao) {
this.paymentDao = paymentDao;
}
}
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