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Paypal revised, should work now. #2

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This commit is contained in:
Stefan Brannfjell 2014-02-02 03:26:39 +01:00
parent 4bb35904bf
commit 11f90bcab8
2 changed files with 102 additions and 65 deletions
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2
buypoints.php
View File

@ -43,7 +43,7 @@ if ($paypal['enabled']) {
<input type="hidden" name="cancel_return" value="<?php echo $paypal['failed']; ?>"> <input type="hidden" name="cancel_return" value="<?php echo $paypal['failed']; ?>">
<input type="hidden" name="rm" value="2"> <input type="hidden" name="rm" value="2">
<input type="hidden" name="notify_url" value="<?php echo $paypal['ipn']; ?>" /> <input type="hidden" name="notify_url" value="<?php echo $paypal['ipn']; ?>" />
<input type="hidden" name="custom" value="<?php echo sanitize($_SESSION['user_id']).'!'.$price.'!'.$points; ?>"> <input type="hidden" name="custom" value="<?php echo (int)$_SESSION['user_id']; ?>">
<input type="submit" value=" PURCHASE "> <input type="submit" value=" PURCHASE ">
</form> </form>
</td> </td>

159
ipn.php
View File

@ -1,87 +1,124 @@
<?php <?php
// Require the functions to connect to database and fetch config values // Require the functions to connect to database and fetch config values
require 'config.php'; require 'config.php';
require 'engine/database/connect.php'; require 'engine/database/connect.php';
function VerifyPaypalIPN(array $IPN = null){
if(empty($IPN)){
$IPN = $_POST;
}
if(empty($IPN['verify_sign'])){
return null;
}
$IPN['cmd'] = '_notify-validate';
$PaypalHost = (empty($IPN['test_ipn']) ? 'www' : 'www.sandbox').'.paypal.com';
$cURL = curl_init();
curl_setopt($cURL, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($cURL, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($cURL, CURLOPT_URL, "https://{$PaypalHost}/cgi-bin/webscr");
curl_setopt($cURL, CURLOPT_ENCODING, 'gzip');
curl_setopt($cURL, CURLOPT_BINARYTRANSFER, true);
curl_setopt($cURL, CURLOPT_POST, true); // POST back
curl_setopt($cURL, CURLOPT_POSTFIELDS, $IPN); // the $IPN
curl_setopt($cURL, CURLOPT_HEADER, false);
curl_setopt($cURL, CURLOPT_RETURNTRANSFER, true);
curl_setopt($cURL, CURLOPT_FORBID_REUSE, true);
curl_setopt($cURL, CURLOPT_FRESH_CONNECT, true);
curl_setopt($cURL, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($cURL, CURLOPT_TIMEOUT, 60);
curl_setopt($cURL, CURLINFO_HEADER_OUT, true);
curl_setopt($cURL, CURLOPT_HTTPHEADER, array(
'Connection: close',
'Expect: ',
));
$Response = curl_exec($cURL);
$Status = (int)curl_getinfo($cURL, CURLINFO_HTTP_CODE);
curl_close($cURL);
if(empty($Response) or !preg_match('~^(VERIFIED|INVALID)$~i', $Response = trim($Response)) or !$Status){
return null;
}
if(intval($Status / 100) != 2){
return false;
}
return !strcasecmp($Response, 'VERIFIED');
}
// Fetch paypal configurations // Fetch paypal configurations
$paypal = $config['paypal']; $paypal = $config['paypal'];
$prices = $config['paypal_prices']; $prices = $config['paypal_prices'];
// read the post from PayPal system and add 'cmd' // Send an empty HTTP 200 OK response to acknowledge receipt of the notification
header('HTTP/1.1 200 OK');
// Build the required acknowledgement message out of the notification just received
$req = 'cmd=_notify-validate'; $req = 'cmd=_notify-validate';
foreach ($_POST as $key => $value) { foreach ($_POST as $key => $value) {
$value = urlencode(stripslashes($value)); $value = urlencode(stripslashes($value));
$req .= "&$key=$value"; $req .= "&$key=$value";
} }
$postdata = $req;
// post back to PayPal system to validate // Assign payment notification values to local variables
$header .= "POST /cgi-bin/webscr HTTP/1.0\r\n"; $item_name = $_POST['item_name'];
$header .= "Content-Type: application/x-www-form-urlencoded\r\n"; $item_number = $_POST['item_number'];
$header .= "Content-Length: " . strlen($req) . "\r\n\r\n"; $payment_status = $_POST['payment_status'];
$fp = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr, 30); $payment_amount = $_POST['mc_gross'];
// assign posted variables to local variables
$item_name = $_POST['item_name'];
$item_number = $_POST['item_number'];
$payment_status = $_POST['payment_status'];
$payment_amount = $_POST['mc_gross'];
$payment_currency = $_POST['mc_currency']; $payment_currency = $_POST['mc_currency'];
$txn_id = mysql_real_escape_string($_POST['txn_id']); $txn_id = $_POST['txn_id'];
$receiver_email = $_POST['receiver_email']; $receiver_email = $_POST['receiver_email'];
$payer_email = mysql_real_escape_string($_POST['payer_email']); $payer_email = $_POST['payer_email'];
$custom = $_POST['custom']; $custom = (int)$_POST['custom'];
if (!$fp) { $connectedIp = $_SERVER['REMOTE_ADDR'];
// HTTP ERROR mysql_insert("INSERT INTO `znote_paypal` VALUES ('', '$txn_id', 'Connection from IP: $connectedIp', '0', '0', '0')");
} else {
fputs ($fp, $header . $req);
while (!feof($fp)) {
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0) {
if ($payment_status == 'Completed') {
$txn_id_check = mysql_query("SELECT `txn_id` FROM `znote_paypal` WHERE `txn_id`='$txn_id'");
if (mysql_num_rows($txn_id_check) != 1) {
if ($receiver_email == $paypal['email']) {
$status = true; $status = VerifyPaypalIPN();
$pieces = explode("!", $custom); if ($status) {
// TODO - fix this logic // Check that the payment_status is Completed
// 0 = user_id, 1 = price, 2 = points if ($payment_status == 'Completed') {
$f_user_id = (int)$pieces[0];
$f_price = (float)$pieces[1];
$f_points = (int)$pieces[2];
if ($payment_amount != $f_price) $status = false; // If he paid wrong ammount
if ($payment_currency != $paypal['currency']) $status = false; // If he paid using another currency
// Verify that the user havent messed around with POST data
if ($status) {
$status = false;
foreach ($prices as $price => $points) {
if ($price == $f_price && $points == $f_points) $status = true; // data does not appear to be manipulated.
}
if ($status) {
// transaction log
$log_query = mysql_query("INSERT INTO `znote_paypal` VALUES ('', '$txn_id', '$payer_email', '$f_user_id', '".(int)$f_price."', '".(int)$f_points."')");
// Give points to user // Check that txn_id has not been previously processed
$old_points = mysql_result(mysql_query("SELECT `points` FROM `znote_accounts` WHERE `account_id`='$f_user_id';"), 0, 'points'); $txn_id_check = mysql_select_single("SELECT `txn_id` FROM `znote_paypal` WHERE `txn_id`='$txn_id'");
$new_points = (int)$f_points; if ($txn_id_check !== false) {
$new_points += $old_points; // Check that receiver_email is your Primary PayPal email
$update_account = mysql_query("UPDATE `znote_accounts` SET `points`='$new_points' WHERE `account_id`='$f_user_id'"); if ($receiver_email == $paypal['email']) {
} else mysql_query("INSERT INTO `znote_paypal` VALUES ('', '$txn_id', 'ERROR: HACKER detected: $payer_email', '$f_user_id', '".(int)$f_price."', '".(int)$f_points."')");
} $status = true;
} else { $paidMoney = 0;
$pmail = $paypal['email']; $paidPoints = 0;
mysql_query("INSERT INTO `znote_paypal` VALUES ('', '$txn_id', 'ERROR: Wrong mail. Received: $receiver_email, configured: $pmail', '0', '0', '0')");
foreach ($prices as $priceValue => $pointsValue) {
if ($priceValue == $payment_amount) {
$paidMoney = $priceValue;
$paidPoints = $pointsValue;
} }
} }
if ($paidMoney == 0) $status = false; // Wrong ammount of money
if ($payment_currency != $paypal['currency']) $status = false; // Wrong currency
// Verify that the user havent messed around with POST data
if ($status) {
// transaction log
mysql_insert("INSERT INTO `znote_paypal` VALUES ('', '$txn_id', '$payer_email', '$custom', '".$paidMoney."', '".$paidPoints."')");
// Process payment
$data = mysql_select_single("SELECT `points` AS `old_points` FROM `znote_accounts` WHERE `account_id`='$custom';");
// Give points to user
$new_points = $data['old_points'] + $paidPoints;
mysql_update("UPDATE `znote_accounts` SET `points`='$new_points' WHERE `account_id`='$custom'");
}
} else {
$pmail = $paypal['email'];
mysql_insert("INSERT INTO `znote_paypal` VALUES ('', '$txn_id', 'ERROR: Wrong mail. Received: $receiver_email, configured: $pmail', '0', '0', '0')");
} }
} }
else if (strcmp ($res, "INVALID") == 0) {
// log for manual investigation
}
} }
fclose ($fp); } else {
// Something is wrong
mysql_insert("INSERT INTO `znote_paypal` VALUES ('', '$txn_id', 'ERROR: Invalid data. $postdata', '0', '0', '0')");
} }
?> ?>