【发布时间】：2016-07-13 12:09:15
【问题描述】：
所以我使用 Paypal 提供的示例代码来正确通信和验证传入的 IPN 消息。使用提供的 Paypal 开发人员工具“IPN 模拟器”，我能够确认我的 IPN 侦听器代码能够成功地与 Paypal 服务器握手，但是当需要重新发送信息以进行验证时，我只能成功连接非- 沙盒版本的贝宝（无论如何都返回无效，因为一切都设置为与沙盒贝宝通信）。当我尝试连接到沙盒版本时，我收到一个 http 错误，这意味着我无法连接到服务器。
我认为我已经将问题隔离到这行代码：
$fh = fsockopen ('ssl://www.sandbox.paypal.com', 443, $errno, $errstr, 30); //HTTP error
下面的代码演示了我的测试，看看哪些 url 可以工作：
$fh = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr, 30);//works, returns invalid
$fh = fsockopen ('tls://www.paypal.com', 443, $errno, $errstr, 30);//works, returns invalid
$fh = fsockopen ('www.paypal.com', 443, $errno, $errstr, 30);//Does not work but does not throw HTTP Error (does not return Verified or Invalid either)
$fh = fsockopen ('ssl://www.sandbox.paypal.com', 443, $errno, $errstr, 30);//HTTP error
$fh = fsockopen ('tls://www.sandbox.paypal.com', 443, $errno, $errstr, 30);//HTTP error
$fh = fsockopen ('www.sandbox.paypal.com', 443, $errno, $errstr, 30);//Does not work but does not throw HTTP Error (does not return Verified or Invalid either)
这是我的服务器上当前的 IPN 侦听器代码（为简单起见，未显示在我的数据库中记录 IPN 数据的额外代码；这里也是此代码所基于的链接：https://developer.paypal.com/docs/classic/ipn/gs_IPN/）：
<?php
// STEP 1 - acknowledge PayPal's notification
header('HTTP/1.1 200 OK');
// STEP 2 - create the response we need to send back to PayPal for them to confirm that it's legit
$resp = 'cmd=_notify-validate';
foreach ($_POST as $parm => $var)
{
$var = urlencode(stripslashes($var));
$resp .= "&$parm=$var";
}
// STEP 3 - Get the HTTP header into a variable and send back the data we received so that PayPal can confirm it's genuine
$httphead = "POST /cgi-bin/webscr HTTP/1.1\r\n";
$httphead .= "Content-Type: application/x-www-form-urlencoded\r\n";
$httphead .= "Content-Length: " . strlen($resp) . "\r\n\r\n";
// Now create a ="file handle" for writing to a URL to paypal.com on Port 443 (the IPN port)
$errno ='';
$errstr='';
$fh = fsockopen ('ssl://www.sandbox.paypal.com', 443, $errno, $errstr, 30); //PROBLEM?
// STEP 4 - Nearly done. Now send the data back to PayPal so it can tell us if the IPN notification was genuine
if (!$fh) {
// Uh oh. This means that we have not been able to get thru to the PayPal server. It's an HTTP failure
}
// Connection opened, so spit back the response and get PayPal's view whether it was an authentic notification
else {
fputs ($fh, $httphead . $resp);
while (!feof($fh))
{
$readresp = fgets ($fh, 1024);
// $readresp = trim($readresp);
if (strcmp ($readresp, "VERIFIED") == 0) //yay verified data!
{
}
else if (strcmp ($readresp, "INVALID") == 0) //Invalid data! :(
{
}
}
fclose ($fh);
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
</body>
</html>
这是我的按钮代码：
<form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post" target="_top">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="M8IC3G88S5WFQ">
<input type="image" src="https://www.sandbox.paypal.com/en_US/i/btn/btn_buynowCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.sandbox.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>
对我应该使用什么fsockopen() 配置有任何帮助吗？
【问题讨论】：
标签： php paypal paypal-ipn fsockopen http-error