PayPal IPN错误请求400错误 [英] PayPal IPN Bad Request 400 Error

问题描述

使用PayPal IPN时，我不断收到错误400.

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

我一直在使脚本向$res的电子邮件发送给我，以查看响应是什么，并且位于while (!feof($fp)) {}循环内.我总是最终得到错误: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

我总共回来了:

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，我尝试过更改工作量，但是没有任何效果.

​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\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen($req) . "\r\n\r\n";

$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);
}

我添加了一行，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的，而不是使用curl这样的HTTP库，因此需要设置适当的HTTP协议版本并添加 HTTP主机标头自己位于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\r\n";
$header .= "Host: www.sandbox.paypal.com\r\n";

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