我正在使用Github上提供的IPN code sample（对于PHP）。通过IPN simulator运行此代码时，加载时间很长，几分钟后PayPal终于抛出此错误。
Proxy Error
The proxy server received an invalid response from an upstream server. The proxy server could not handle the request POST /webapps/developer/applications/ipn_simulator.
Reason: Error reading from remote server
另一位用户面临同样的问题here。 然而，似乎他的问题是由于他没有使用好的剧本。
我的ipn.php文件，在浏览器中直接访问时不会引发任何错误。它看起来如下：
/* INITIALIZATION */
require_once $_SERVER['DOCUMENT_ROOT'] . '/lib/aes.php'; // AES lib
require_once $_SERVER['DOCUMENT_ROOT'] . '/lib/db.php'; // DB configuration
require_once $_SERVER['DOCUMENT_ROOT'] . '/lib/mandrill/src/Mandrill.php'; // Mandrill mailer lib
$UA = $_SERVER['HTTP_USER_AGENT']; // User-Agent
//$proxy = '<my IP>:443';
$ip = getenv('HTTP_CLIENT_IP')?:
getenv('HTTP_X_FORWARDED_FOR')?:
getenv('HTTP_X_FORWARDED')?:
getenv('HTTP_FORWARDED_FOR')?:
getenv('HTTP_FORWARDED')?:
getenv('REMOTE_ADDR'); // IP address
$paypal_business = '< MY PAYPAL ID >'; // My PayPal ID
$license_amount = array( 10 => 0,
25 => 1,
50 => 2); // Type of license wrt to amount paid
$license_types = array( 0 => 1,
1 => 5,
2 => 20); // Number of licenses wrt type of license
$license_names = array( 0 => 'Single',
1 => 'Group',
2 => 'Company'); // Name of license wrt type of license
$donated = false;
/* MAILER powered by Mandrill */
function GmSendMail($bdy, $sbj, $em) {
try {
$mandrill = new Mandrill('< MY API KEY >'); // Mandrill API Key
$message = array(
'html' => $bdy,
'subject' => $sbj,
'from_email' => 'mail@example.com',
'from_name' => 'Company',
'to' => array(
array(
'email' => $em,
'type' => 'to'
)
),
'headers' => array('Reply-To' => 'support@example.com'),
'important' => true,
'track_opens' => true,
'track_clicks' => null,
'auto_text' => null,
'auto_html' => true,
'inline_css' => null,
'url_strip_qs' => null,
'preserve_recipients' => null,
'view_content_link' => null,
'tracking_domain' => null,
'signing_domain' => 'example.com',
'return_path_domain' => null,
'merge' => true,
'tags' => array('license-activation'),
'metadata' => array('website' => 'example.com')
);
$async = false;
$ip_pool = 'Main Pool';
$result = $mandrill->messages->send($message, $async, $ip_pool);
//print_r($result);
} catch(Mandrill_Error $e) {
// Mandrill errors are thrown as exceptions
echo 'An unexpected error occurred: ' . get_class($e) . ' - ' . $e->getMessage();
// A mandrill error occurred: Mandrill_Unknown_Subaccount - No subaccount exists with the id 'customer-123'
throw $e;
}
}
/* PAYPAL IPN: CHECK PAYMENT HAS BEEN COMPLETED */
// 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);
// Set to 0 once you're ready to go live
define("USE_SANDBOX", 1);
define("LOG_FILE", "./ipn.log");
// 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.
$cert = __DIR__ . "/lib/cacert.pem";
curl_setopt($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 ($res, "VERIFIED") == 0) {
//if (preg_match("!(VERIFIED)\s*\Z!",$res)) {
$payment_status = $_POST['payment_status'];
$payment_amount = $_POST['mc_gross'];
$payment_date = $_POST['payment_date'];
$txn_id = $_POST['txn_id'];
$receiver_business = $_POST['business'];
$payer_email = $_POST['payer_email'];
$email_hash = sha1($payer_email, TRUE);
$user_id = $_POST['custom'];
// Retrieve license information
$license = $license_amount[$payment_amount];
$nblic = $license_types[$license] - 1;
$name_license = $license_names[$license];
// Confirmation email variables
$subject_paypal = 'Premium License [' . $name_license . ']';
$body_paypal = '<p>Dear user.</p>';
if ( $payment_status == 'Completed' && $receiver_business == strtolower($paypal_business) ) {
/* DB interactions and checks */
$check = mysql_query("SELECT * FROM `premium` WHERE `id` = '$email_hash'");
/* 1) User already exists: Update DB */
if (mysql_num_rows($check) === 1) {
$row = mysql_fetch_assoc($check);
$transaction_id = $row['pa'];
if ($txn_id == $transaction_id) {
$donated = true;
die('Premium license already activated.');
} else {
$licenses_left = $row['la'];
$current_key = $row['k'];
$newnblic = $licenses_left + $nblic;
// UPDATE DB
mysql_query("UPDATE `premium` SET `lt` = '$license', `la` = '$newnblic', `t` = '$payment_date', `pa` = '$txn_id' WHERE `id` = '$email_hash' ");
// SEND EMAIL CONFIRMATION
GmSendMail($body_paypal, $subject_paypal, $payer_email);
}
/* 2) This is a NEW entry: Insert into DB
*/
} else {
// CREATE ENTRY INTO DB
mysql_query("INSERT INTO `premium` VALUES('$email_hash','$license','$nblic','$payment_date','$txn_id')");
// SEND EMAIL CONFIRMATION
GmSendMail($body_paypal, $subject_paypal, $payer_email);
}
}
if(DEBUG == true) {
error_log(date('[Y-m-d H:i e] '). "Verified IPN: $req ". PHP_EOL, 3, LOG_FILE);
}
} else if (strcmp ($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: $req" . PHP_EOL, 3, LOG_FILE);
}
}
直接从浏览器访问ipn.log文件时显示：
[2014-02-15 11:53 America/Denver] HTTP request of validation request:POST /cgi-bin/webscr HTTP/1.1
Host: www.sandbox.paypal.com
Accept: */*
Connection: Close
Content-Length: 20
Content-Type: application/x-www-form-urlencoded
for IPN payload: cmd=_notify-validate
[2014-02-15 11:53 America/Denver] HTTP response of validation request: HTTP/1.1 200 OK
Date: Sat, 15 Feb 2014 18:53:08 GMT
Server: Apache
X-Frame-Options: SAMEORIGIN
Set-Cookie: < Cookie Hash >; domain=.paypal.com; path=/; Secure; HttpOnly
Set-Cookie: cookie_check=yes; expires=Tue, 13-Feb-2024 18:53:08 GMT; domain=.paypal.com; path=/; Secure; HttpOnly
Set-Cookie: navcmd=_notify-validate; domain=.paypal.com; path=/; Secure; HttpOnly
Set-Cookie: navlns=0.0; expires=Mon, 15-Feb-2016 18:53:08 GMT; domain=.paypal.com; path=/; Secure; HttpOnly
Set-Cookie: Apache=10.72.109.11.1392490388263396; path=/; expires=Mon, 08-Feb-44 18:53:08 GMT
Connection: close
Set-Cookie: X-PP-SILOVER=name%3DSANDBOX3.WEB.1%26silo_version%3D880%26app%3Dslingshot%26TIME%3D2495086418; domain=.paypal.com; path=/; Secure; HttpOnly
Set-Cookie: X-PP-SILOVER=; Expires=Thu, 01 Jan 1970 00:00:01 GMT
Set-Cookie: Apache=10.72.128.11.1392490388253446; path=/; expires=Mon, 08-Feb-44 18:53:08 GMT
Vary: Accept-Encoding
Strict-Transport-Security: max-age=14400
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8
INVALID
[2014-02-15 11:53 America/Denver] Invalid IPN: cmd=_notify-validate
有关信息，ipn.php 托管在启用了https的子域，.htaccess是干净的，不会阻止任何代理。使用PHP 5.4。我在一个拥有专用IP的共享服务器上。
我尝试取消注释ipn.php中的以下几行：
// CONFIG: Optional proxy configuration
curl_setopt($ch, CURLOPT_PROXY, $proxy);
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
一次：
$proxy = 'mydedicatedIP:80';
另一次：
$proxy = 'mydedicatedIP:443';
没有任何成功。欢迎任何帮助！