我需要有关PayPal订阅付款IPN处理的建议。 我已经根据PayPal代码示例编写了一个IPN处理程序/监听器。侦听器将IPN消息复制回PayPal，后面跟cmd = _notify-validate。我可以毫无问题地设置订阅，即用户输入他们的详细信息，并将其与他们的订单信息一起传递给PayPal，他们登录到他们的帐户并同意订阅。在PayPal成功响应后，订单被确认并且我的数据库已更新。 我遇到的问题是定期付款通知。我已经通过PayPal Sandbox设置了每日订阅，每次PayPal建议客户付款，等待客户登录他们的PayPal帐户并接受付款，这导致另一个IPN确认付款完成。我发回了验证请求前面的IPN消息，并从PayPal Sandbox接收空响应。我希望根据PayPal文档收到“已验证”或“无效”？但是，PayPal对返回消息的响应是“”还是null？ IPN验证代码如下所示，并使用“https://www.sandbox.paypal.com/cgi-bin/webscr”作为URL：
$url_parsed=parse_url($this->paypal_url);
// generate the post string from the _POST vars and load the _POST vars into an array
$post_string = "cmd=_notify-validate"; // start IPN response with validate command
foreach ($_POST as $field=>$value) {
$post_string .= '&';
$this->ipn_data["$field"] = $value;
$post_string .= $field.'='.urlencode(stripslashes($value));
}
// open the connection to PayPal
$fp = fsockopen($url_parsed[host],443,$err_num,$err_str,30);
if(!$fp) {
// could not open the connection. If logging is on, log the error message
$this->last_error = "fsockopen error no. $errnum: $errstr";
$this->log_ipn_results(false);
return false;
} else {
// Post the data back to PayPal
fputs($fp, "POST $url_parsed[path] HTTPS/1.1\r\n");
fputs($fp, "Host: $url_parsed[host]\r\n");
fputs($fp, "Content-type: application/x-www-form-urlencoded\r\n");
fputs($fp, "Content-length: ".strlen($post_string)."\r\n");
fputs($fp, "Connection: close\r\n\r\n");
fputs($fp, $post_string . "\r\n\r\n");
// loop through the response from the server and append to variable
while(!feof($fp)) {
$this->ipn_response .= fgets($fp, 1024);
}
fclose($fp); // close connection
/* PayPal sends a single word back, which is VERIFIED if the message originated with PayPal
or INVALID if there is any discrepancy with what was originally sent */
if (strcmp ("INVALID", $this->ipn_response) != 0) {
// The above is a work around to address null response! For now!
// Valid IPN transaction.
$this->log_ipn_results(true);
return true;
} else {
// Invalid IPN transaction. Check the log for details.
$this->last_error = 'IPN Validation Failed.';
$this->log_ipn_results(false);
return false;
}
我测试了超时并认为该过程完全在30秒的时间限制内，并确认$ post_string的结构在开始时使用cmd复制原始消息。我能想到的唯一另一个问题是IPN变量的返回发布是从SSL证书保护的页面发送的吗？无论如何，除非我遗漏了一些东西，否则我认为PayPal Sandbox实际上没有响应，因此无结果？ 任何建议或指导都会非常感激，因为我依靠多个每日订阅付款期来通过Sandbox进行测试。
答案 0 :(得分：0)
在回发验证事务的参数时，请勿从值中删除斜杠。它们必须按原样寄回。
答案 1 :(得分：0)
我实现了PHP Curl处理程序，如下所示：
<?php
function validate_ipn() {
// CONFIG: Enable debug mode. This means we'll log requests into 'ipn.log' in the same directory.
// Especially useful if you encounter network errors or other intermittent problems with IPN (validation).
// Set this to 0 once you go live or don't require logging.
define("DEBUG", 1);
define("LOG_FILE", "../log/ipn.log");
// Set to 0 once you're ready to go live
define("USE_SANDBOX", 1);
// Read POST data
// reading posted data directly from $_POST causes serialization
// issues with array data in POST. Reading raw POST data from input stream instead.
$raw_post_data = file_get_contents('php://input');
$raw_post_array = explode('&', $raw_post_data);
$myPost = array();
foreach ($raw_post_array as $keyval) {
$keyval = explode ('=', $keyval);
if (count($keyval) == 2)
$myPost[$keyval[0]] = urldecode($keyval[1]);
}
// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-validate';
if (function_exists('get_magic_quotes_gpc')) {
$get_magic_quotes_exists = true;
}
foreach ($myPost as $key => $value) {
if ($get_magic_quotes_exists == true && get_magic_quotes_gpc() == 1) {
$value = urlencode(stripslashes($value));
} else {
$value = urlencode($value);
}
$req .= "&$key=$value";
}
// Post IPN data back to PayPal to validate the IPN data is genuine
// Without this step anyone can fake IPN data
if (USE_SANDBOX == true) {
$paypal_url = "https://www.sandbox.paypal.com/cgi-bin/webscr";
} else {
$paypal_url = "https://www.paypal.com/cgi-bin/webscr";
}
$ch = curl_init($paypal_url);
if ($ch == FALSE) {
return FALSE;
}
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);
if (DEBUG == true) {
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLINFO_HEADER_OUT, 1);
}
// CONFIG: Optional proxy configuration
//curl_setopt($ch, CURLOPT_PROXY, $proxy);
//curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
// Set TCP timeout to 30 seconds
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));
// CONFIG: Please download 'cacert.pem' from "http://curl.haxx.se/docs/caextract.html" and set the directory path
// of the certificate as shown below. Ensure the file is readable by the webserver.
// This is mandatory for some environments.
//$cert = __DIR__ . "./cacert.pem";
//curl_setopt($ch, CURLOPT_CAINFO, $cert);
$res = curl_exec($ch);
if (curl_errno($ch) != 0) { // cURL error
if (DEBUG == true) {
error_log(date('[Y-m-d H:i e] '). "Can't connect to PayPal to validate IPN message: " . curl_error($ch) . PHP_EOL, 3, LOG_FILE);
}
curl_close($ch);
exit;
} else {
// Log the entire HTTP response if debug is switched on.
if (DEBUG == true) {
error_log(date('[Y-m-d H:i e] '). "HTTP request of validation request:". curl_getinfo($ch, CURLINFO_HEADER_OUT) ." for IPN payload: $req" . PHP_EOL, 3, LOG_FILE);
error_log(date('[Y-m-d H:i e] '). "HTTP response of validation request: $res" . PHP_EOL, 3, LOG_FILE);
// Split response headers and payload
list($headers, $res) = explode("\r\n\r\n", $res, 2);
}
curl_close($ch);
}
// Inspect IPN validation result and act accordingly
if (strcmp ($res, "VERIFIED") == 0) {
if (DEBUG == true) {
error_log(date('[Y-m-d H:i e] '). "Verified IPN: $req ". PHP_EOL, 3, LOG_FILE);
}
return true;
} else if (strcmp ($res, "INVALID") == 0) {
// log for manual investigation
// Add business logic here which deals with invalid IPN messages
if (DEBUG == true) {
error_log(date('[Y-m-d H:i e] '). "Invalid IPN: $req" . PHP_EOL, 3, LOG_FILE);
}
return false;
}
}
?>
它有效！