Initial project's source code check-in.
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// Copyright (c) 2011, Outercurve Foundation.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// - Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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//
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// - Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// - Neither the name of the Outercurve Foundation nor the names of its
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// contributors may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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using System;
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using System.Web;
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using System.Xml;
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using System.Xml.Serialization;
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using System.Net;
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using System.IO;
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using System.Collections.Specialized;
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using System.Collections.Generic;
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using System.Text;
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using System.Security.Cryptography;
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namespace WebsitePanel.Ecommerce.EnterpriseServer
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{
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/// <summary>
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/// Payment provider for the PayPal Gateway
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/// </summary>
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public class PayPalStandardProvider : SystemPluginBase, IInteractivePaymentGatewayProvider
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{
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public const string DEMO_SERVICE_URL = "https://www.sandbox.paypal.com/cgi-bin/webscr";
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public const string LIVE_SERVICE_URL = "https://www.paypal.com/cgi-bin/webscr";
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public const string BUSINESS_NOT_MATCH_MSG = "Business account doesn't match";
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public const string INVALID_RESPONSE_MSG = "Response is reported as either invalid or corrupted";
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public const string PAYMENT_REJECTED_MSG = "Payment has been rejected by payment gateway";
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public const string IPN_PROCESSOR_ENDPOINT = "Services/PayPalIPN.ashx";
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public const string CART_COMMAND = "_cart";
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public const string ErrorPrefix = "PayPalStandard.";
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/// <summary>
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/// Gets whether plug-in running in live mode
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/// </summary>
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public bool LiveMode
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{
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get
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{
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return Convert.ToBoolean(PluginSettings[PayPalStdSettings.LIVE_MODE]);
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}
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}
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/// <summary>
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/// Gets service business account
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/// </summary>
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public string Business
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{
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get { return PluginSettings[PayPalStdSettings.BUSINESS]; }
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}
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/// <summary>
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/// Gets service return url
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/// </summary>
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public string ReturnUrl
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{
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get { return PluginSettings[PayPalStdSettings.RETURN_URL]; }
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}
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/// <summary>
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/// Gets service cancel return url
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/// </summary>
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public string CancelReturnUrl
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{
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get { return PluginSettings[PayPalStdSettings.CANCEL_RETURN_URL]; }
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}
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/// <summary>
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/// Gets service url
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/// </summary>
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public string ServiceUrl
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{
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get
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{
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if (LiveMode)
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return LIVE_SERVICE_URL;
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return DEMO_SERVICE_URL;
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}
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}
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public PayPalStandardProvider()
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{
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}
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#region IInteractivePaymentGatewayProvider Members
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public CheckoutFormParams GetCheckoutFormParams(FormParameters formParams, InvoiceItem[] invoiceLines)
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{
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// normalize target site variable
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string targetSite = formParams["target_site"].EndsWith("/") ? formParams["target_site"]
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: formParams["target_site"] + "/";
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CheckoutFormParams outputParams = new CheckoutFormParams();
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// setup service url
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outputParams.Action = ServiceUrl;
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outputParams.Method = CheckoutFormParams.POST_METHOD;
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// copy command
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outputParams["cmd"] = CART_COMMAND;
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// workaround to make IPN callbacks work
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outputParams["rm"] = "2";
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// set upload value to indicate a third-party shopping cart
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outputParams["upload"] = "1";
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// set business
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outputParams["business"] = Business;
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// set cancel return url
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outputParams["cancel_return"] = String.Concat(targetSite, "?pid=ecOnlineStore&ContractId=", formParams[FormParameters.CONTRACT]);
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// set return url
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outputParams["return"] = targetSite;
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// set IPN-Endpoint url
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outputParams["notify_url"] = String.Concat(targetSite, IPN_PROCESSOR_ENDPOINT);
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// set invoice number
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outputParams["invoice"] = formParams[FormParameters.INVOICE];
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// set contract number
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outputParams["custom"] = formParams[FormParameters.CONTRACT];
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// set invoice currency
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outputParams["currency_code"] = formParams[FormParameters.CURRENCY];
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// set formatted invoice number
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outputParams["item_name_1"] = String.Format("{0} #{1}", FormParameters.INVOICE, formParams[FormParameters.INVOICE]);
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// set invoice amount
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outputParams["amount_1"] = formParams[FormParameters.AMOUNT];
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// copy first name
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AddParameter(formParams, outputParams, FormParameters.FIRST_NAME, "first_name");
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// copy last name
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AddParameter(formParams, outputParams, FormParameters.LAST_NAME, "last_name");
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// copy address
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AddParameter(formParams, outputParams, FormParameters.ADDRESS, "address1");
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// copy city
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AddParameter(formParams, outputParams, FormParameters.CITY, "city");
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// copy state
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AddParameter(formParams, outputParams, FormParameters.STATE, "state");
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// copy country
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AddParameter(formParams, outputParams, FormParameters.COUNTRY, "country");
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// copy zip
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AddParameter(formParams, outputParams, FormParameters.ZIP, "zip");
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// copty email
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AddParameter(formParams, outputParams, FormParameters.EMAIL, "email");
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// copy phone number
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if (formParams[FormParameters.COUNTRY] != "US" && formParams[FormParameters.COUNTRY] != "CA")
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{
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// phone numbers outside U.S copy as is
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outputParams["night_phone_b"] = formParams[FormParameters.PHONE];
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}
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// return whole set of params
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return outputParams;
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}
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#endregion
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#region IPaymentGatewayProvider Members
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public TransactionResult SubmitPaymentTransaction(CheckoutDetails details)
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{
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//init result structure
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TransactionResult result = new TransactionResult();
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// check is request genuine depending on the provider mode
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Process_IPN_Request(result, details);
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//
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return result;
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}
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private void Process_PDT_Request(TransactionResult result, CheckoutDetails details)
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{
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}
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private void Process_IPN_Request(TransactionResult result, CheckoutDetails details)
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{
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result.RawResponse = "";
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// build raw response
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foreach (string keyName in details.GetAllKeys())
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{
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if (String.IsNullOrEmpty(keyName))
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continue;
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// check for separator
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if (!String.IsNullOrEmpty(result.RawResponse) &&
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!result.RawResponse.EndsWith("&"))
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result.RawResponse += "&";
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result.RawResponse += keyName + "=" + details[keyName];
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}
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// compare business account against email addres in response
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if (!String.Equals(details["receiver_email"], Business, StringComparison.InvariantCultureIgnoreCase))
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throw new Exception(BUSINESS_NOT_MATCH_MSG);
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// validate whether response still genuine
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if(!IsResponseGenuine(result.RawResponse))
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throw new Exception(INVALID_RESPONSE_MSG);
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// build tran id
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string transactionId = details["txn_id"];
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// check payment status
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switch(details["payment_status"])
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{
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case "Completed":
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case "Processed":
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result.Succeed = true;
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// store order details
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result.TransactionId = transactionId;
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result.TransactionStatus = TransactionStatus.Approved;
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break;
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case "Pending":
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result.Succeed = true;
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// store order details
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result.TransactionId = transactionId;
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result.TransactionStatus = TransactionStatus.Pending;
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break;
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default:
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result.Succeed = false;
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result.TransactionStatus = TransactionStatus.Declined;
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break;
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}
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}
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#endregion
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private void AddParameter(FormParameters inputParams, CheckoutFormParams outputParams, string inputKey, string outputKey)
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{
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string formParameter = inputParams[inputKey];
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if (formParameter != null)
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{
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outputParams[outputKey] = formParameter;
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}
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}
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private bool IsResponseGenuine(string strFormValues)
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{
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// Create the request back
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HttpWebRequest request = (HttpWebRequest)WebRequest.Create(ServiceUrl);
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// Set values for the request back
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request.Method = "POST";
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request.ContentType = "application/x-www-form-urlencoded";
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string strNewValue = strFormValues + "&cmd=_notify-validate";
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request.ContentLength = strNewValue.Length;
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// Write the request back IPN strings
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StreamWriter writer = new StreamWriter(request.GetRequestStream(), System.Text.Encoding.ASCII);
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writer.Write(strNewValue);
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writer.Close();
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// Do the request to PayPal and get the response
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StreamReader reader = new StreamReader(request.GetResponse().GetResponseStream());
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string strResponse = reader.ReadToEnd().Trim().ToUpper();
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reader.Close();
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return String.Equals(strResponse, "VERIFIED", StringComparison.InvariantCultureIgnoreCase);
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}
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private string HtmlEncode(string s)
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{
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return HttpContext.Current.Server.UrlEncode(s);
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}
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}
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}
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