PayPal IPN 错误请求 400 错误

2021-12-29 00:00:00 php paypal paypal-ipn

使用 PayPal IPN，我不断收到错误 400.

Using the PayPal IPN, I keep getting an error 400.

我一直在让脚本向我发送 $res 的电子邮件以查看响应是什么，在 while (!feof($fp)) {} 内环形.我总是最终收到错误:HTTP/1.0 400 Bad Request

I have been making the script send me emails of $res to see what the response is, inside of the while (!feof($fp)) {} loop. I always end up getting the error: HTTP/1.0 400 Bad Request

总的来说我回来了:

HTTP/1.0 400 Bad Request
​Connection: close
Server: BigIP
Content-Length: 19
​Invalid Host Header

这之后的最后一行只是空白.这是我的代码，我尝试过更改大量内容，但没有任何效果.

​The last line after this is just blank. Here is my code, I have tried changing loads of things but nothing works.

$req = 'cmd=_notify-validate';
foreach ($_POST as $key => $value) {
$value = urlencode(stripslashes($value));
$value = preg_replace('/(.*[^%^0^D])(%0A)(.*)/i','${1}%0D%0A${3}', $value);// IPN fix
$req .= "&$key=$value";
}

// post back to PayPal system to validate
$header = "POST /cgi-bin/webscr HTTP/1.0
";
$header .= "Content-Type: application/x-www-form-urlencoded
";
$header .= "Content-Length: " . strlen($req) . "

";

$fp = fsockopen('ssl://www.sandbox.paypal.com', 443, $errno, $errstr, 30);

if (!$fp) {
// HTTP ERROR
} else {
   fputs($fp, $header . $req);
   while (!feof($fp)) {
       $res = fgets ($fp, 1024);
       if (strcmp ($res, "VERIFIED") == 0) {
           //ADD TO DB
       } else if (strcmp ($res, "INVALID") == 0) {
           // PAYMENT INVALID & INVESTIGATE MANUALY!
           // E-mail admin or alert user
       }
   }
   fclose ($fp);
}

我加了一行，这是发送前的标题:

I have added a line, this is the header before it is sent:

 Host: www.sandbox.paypal.com
 POST /cgi-bin/webscr HTTP/1.0
 Content-Type: application/x-www-form-urlencoded
 Content-Length: 1096

推荐答案

由于您是自己打开套接字，而不是使用 curl 等 HTTP 库，因此您需要设置正确的 HTTP 协议版本并添加 HTTP 主机标头位于 POST 行下方.

Since you're opening the socket yourself, rather than using an HTTP library such as curl, you need to set the proper HTTP Protocol version and add the HTTP Host header yourself just below the POST line.

$header = "POST /cgi-bin/webscr HTTP/1.1
";
$header .= "Host: www.sandbox.paypal.com
";

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