FreeMoney.FreeMoneyModule.IPN C# (CSharp) Метод

        public Hashtable IPN(Hashtable request)
        {
            Hashtable reply = new Hashtable ();

            // Does not matter what we send back to PP here.
            reply["int_response_code"] = 200;
            // 200 OK
            reply["str_response_string"] = "IPN Processed - Have a nice day.";
            reply["content_type"] = "text/html";

            if (!m_active) {
                m_log.Error ("[FreeMoney] Recieved IPN request, but module is disabled. Aborting.");
                reply["str_response_string"] = "IPN Not processed. Module is not enabled.";
                return reply;
            }

            Dictionary<string, object> postvals = ServerUtils.ParseQueryString ((string)request["body"]);
            string originalPost = (string)request["body"];

            string modifiedPost = originalPost + "&cmd=_notify-validate";

            HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create (m_ppprotocol+"://" + m_ppurl +
                                                                               m_pprequesturi);
            httpWebRequest.Method = "POST";

            httpWebRequest.ContentLength = modifiedPost.Length;
            StreamWriter streamWriter = new StreamWriter (httpWebRequest.GetRequestStream ());
            streamWriter.Write (modifiedPost);
            streamWriter.Close ();

            string response;

            HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse ();
            using (StreamReader streamReader = new StreamReader (httpWebResponse.GetResponseStream ())) {
                response = streamReader.ReadToEnd ();
                streamReader.Close ();
            }

            if (httpWebResponse.StatusCode != HttpStatusCode.OK) {
                m_log.Error ("[FreeMoney] IPN Status code != 200. Aborting.");
                debugStringDict (postvals);
                return reply;
            }

            if (!response.Contains ("VERIFIED")) {
                m_log.Error ("[FreeMoney] IPN was NOT verified. Aborting.");
                debugStringDict (postvals);
                return reply;
            }

            // Handle IPN Components
            try {
                if ((string)postvals["payment_status"] != "Completed") {
                    m_log.Warn ("[FreeMoney] Transaction not confirmed. Aborting.");
                    debugStringDict (postvals);
                    return reply;
                }

                if (((string)postvals["mc_currency"]).ToUpper () != m_gridCurrencyCode) {
                    m_log.Error ("[FreeMoney] Payment was made in an incorrect currency (" +
                                 postvals["mc_currency"] + "). Aborting.");
                    debugStringDict (postvals);
                    return reply;
                }

                // Check we have a transaction with the listed ID.
                UUID txnID = new UUID ((string)postvals["item_number"]);
                FreeMoneyTransaction txn;

                lock (m_transactionsInProgress) {
                    if (!m_transactionsInProgress.ContainsKey (txnID)) {
                        m_log.Error ("[FreeMoney] Recieved IPN request for Payment that is not in progress. Aborting.");
                        debugStringDict (postvals);
                        return reply;
                    }

                    txn = m_transactionsInProgress[txnID];
                }

                // Check user paid correctly...
                if (((string)postvals["business"]).ToLower () != txn.SellersEmail.ToLower ()) {
                    m_log.Error ("[FreeMoney] Expected payment to " + txn.SellersEmail +
                                 " but receiver was " + (string)postvals["business"] + " instead. Aborting.");
                    debugStringDict (postvals);
                    return reply;
                }

                Decimal amountPaid = Decimal.Parse ((string)postvals["mc_gross"]);
                if (System.Math.Abs (ConvertAmountToCurrency (txn.Amount) - amountPaid) > (Decimal)0.001) {
                    m_log.Error ("[FreeMoney] Expected payment was " + ConvertAmountToCurrency (txn.Amount) +
                                 " but received " + amountPaid + " " + postvals["mc_currency"] + " instead. Aborting.");
                    debugStringDict (postvals);
                    return reply;
                }

                // At this point, the user has paid, paid a correct amount, in the correct currency.
                // Time to deliver their items. Do it in a seperate thread, so we can return "OK" to PP.
                Util.FireAndForget (delegate { TransferSuccess (txn); });
            } catch (KeyNotFoundException) {
                m_log.Error ("[FreeMoney] Received badly formatted IPN notice. Aborting.");
                debugStringDict (postvals);
                return reply;
            }
            // Wheeeee

            return reply;
        }