CREDIT CARD TRANSACTIONS in Visual C#.NET

Creating Code 39 in Visual C#.NET CREDIT CARD TRANSACTIONS

CHAPTER 15 CREDIT CARD TRANSACTIONS
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Depending on the value, you decide which of the XMLs that you previously saved in the user session should be displayed as follows: else { header('Content-type: text/xml'); switch ($_GET['step']) { case 1: print $_SESSION['pre_request']; break; case 2: print $_SESSION['pre_response']; break; case 3: print $_SESSION['fulfill_response']; break; } exit; }
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Integrating DataCash with HatShop
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Now that you have a new class that performs credit card transactions, all you need to do is integrate its functionality into the order pipeline you built in the previous chapters. To fully integrate DataCash with HatShop, you ll need to update the existing PsCheckFunds and PsTakePayments classes. You need to modify the pipeline section classes that deal with credit card transactions. We ve already included the infrastructure for storing and retrieving authentication codes and reference information, via the OrderProcessor.SetOrderAuthCodeAndReference method.
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Exercise: Implementing the Order Pipeline Classes
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1. First modify business/ps_check_funds.php to work with DataCash: < php class PsCheckFunds implements IPipelineSection { public function Process($processor) { // Audit $processor->CreateAudit('PsCheckFunds started.', 20100);
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CHAPTER 15 CREDIT CARD TRANSACTIONS
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$order_total_cost = $processor->mOrderInfo['total_amount']; $order_total_cost += $processor->mOrderInfo['shipping_cost']; $order_total_cost += round((float)$order_total_cost * (float)$processor->mOrderInfo['tax_percentage'], 2) / 100.00; $request = new DataCashRequest(DATACASH_URL); $request->MakeXmlPre(DATACASH_CLIENT, DATACASH_PASSWORD, $processor->mOrderInfo['order_id'] + 1000006, $order_total_cost, 'GBP', 'pre', $processor->mCustomerInfo['credit_card']->CardNumber, $processor->mCustomerInfo['credit_card']->ExpiryDate, $processor->mCustomerInfo['credit_card']->IssueDate, $processor->mCustomerInfo['credit_card']->IssueNumber); $responseXml = $request->GetResponse(); $xml = simplexml_load_string($responseXml); if ($xml->status == 1) { $processor->SetAuthCodeAndReference( $xml->merchantreference, $xml->datacash_reference); // Audit $processor->CreateAudit('Funds available for purchase.', 20102); // Update order status $processor->UpdateOrderStatus(2); // Continue processing $processor->mContinueNow = true; } else { // Audit $processor->CreateAudit('Funds not available for purchase.', 20103); throw new Exception('Credit card check funds failed for order ' . $processor->mOrderInfo['order_id'] . "\n\n" . 'Data exchanged:' . "\n" . $request->GetResponse() . "\n" . $responseXml); } // Audit $processor->CreateAudit('PsCheckFunds finished.', 20101); } } >
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CHAPTER 15 CREDIT CARD TRANSACTIONS
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2. Modify the business/ps_take_payment.php file as follows: < php class PsTakePayment implements IPipelineSection { public function Process($processor) { // Audit $processor->CreateAudit('PsTakePayment started.', 20400); $request = new DataCashRequest(DATACASH_URL); $request->MakeXmlFulFill(DATACASH_CLIENT, DATACASH_PASSWORD, 'fulfill', $processor->mOrderInfo['auth_code'], $processor->mOrderInfo['reference']); $responseXml = $request->GetResponse(); $xml = simplexml_load_string($responseXml); if ($xml->status == 1) { // Audit $processor->CreateAudit( 'Funds deducted from customer credit card account.', 20402); // Update order status $processor->UpdateOrderStatus(5); // Continue processing $processor->mContinueNow = true; } else { // Audit $processor->CreateAudit('Could not deduct funds from credit card.', 20403); throw new Exception('Credit card take payment failed for order ' . $processor->mOrderInfo['order_id'] . "\n\n" . 'Data exchanged:' . "\n" . $request->GetResponse() . "\n" . $responseXml); } // Audit $processor->CreateAudit('PsTakePayment finished.', 20401); } } >
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CHAPTER 15 CREDIT CARD TRANSACTIONS
3. Add a reference to the business/datacash_request.php file in include/app_top.php as highlighted: require_once BUSINESS_DIR . 'ps_ship_ok.php'; require_once BUSINESS_DIR . 'ps_final_notification.php'; require_once BUSINESS_DIR . 'datacash_request.php';
Testing DataCash Integration
Now that you have all this in place, it s important to test with a few orders. You can do this easily by making sure you create a customer with magic credit card details. As mentioned earlier in the chapter, DataCash supplies these numbers for testing purposes and to obtain specific responses from DataCash. A sample of these numbers is shown in Table 15-2; a full list is available on the DataCash web site. Table 15-2. DataCash Credit Card Test Numbers
Card Type
Switch
Card Number
4936000000000000001 4936000000000000019 6333000000000005 6333000000000013 6333000000123450
Return Code
1 7 1 7 1 7 1 1
Description
Authorized with random auth code. Decline the transaction. Authorized with random auth code. Decline the transaction. Authorized with random auth code. Decline the transaction. Authorized with random auth code. Authorized with random auth code.
Sample Message
AUTH CODE DECLINED AUTH CODE DECLINED AUTH CODE DECLINED AUTH CODE AUTH CODE
Visa
4242424242424242 4444333322221111 4546389010000131
At this moment, you can experiment with your new fully featured e-commerce web site by placing orders with the test credit card numbers, checking the emails the web site sends, and finding out how it reacts in certain situation, such as how it logs errors, how orders are administered using the orders administration page, and so on.
Going Live
Moving from the test account to the live one is now simply a matter of replacing the DataCash login info in include/config.php. After you set up a merchant bank account, you can use the new details to set up a new DataCash account, obtaining new client and password data along the way. You also need to change the URL for the DataCash server that you send data to
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