Question

我知道有人曾经问过这个问题，但没有一个解决方案适合我。我正在使用paypal（https://developer.paypal.com/webapps/developer/applications/ipn_simulator）的即时付款通知（IPN）模拟器，但我总是收到： 来自PayPal的意外回复：HTTP / 1.1 400错误请求

<?php
    //Open a socket for the acknowledgement request
        $fp = fsockopen (ssl://www.sandbox.paypal.com, 443, $errno, $errstr, 30);

        if (!$fp) { 
            // fsockopen error
            throw new Exception("An error occured while using fsockopen(): [$errno] $errstr");
        } 

        //Set up the acknowledgement request headers
        $header .= "POST /cgi-bin/webscr HTTP/1.1\r\n";
        $header .= "Host: ssl://www.sandbox.paypal.com\r\n";
        $header .= "Content-Type: application/x-www-form-urlencoded\r\n";
        $header .= "Content-Length: ".strlen($data)."\r\n";
        $header .= "Connection: Close\r\n\r\n";

        // Post request back to PayPal for validation
        fputs ($fp, $header . $data);
        while (!feof($fp)) {                     // While not EOF
            $res = fgets ($fp, 1024);              // Get the acknowledgement response
            if (strcmp ($res, "VERIFIED") == 0)  {  // Response is VERIFIED
                $response = 'verified';
            }
            else if (strcmp ($res, "INVALID") == 0)  { // Response is INVALID
                $response = 'invalid';
            } 
            else {
                throw new Exception("Unexpected response from PayPal: $res");
            }
        }

编辑：更改后

$header .= "Host: ssl://www.sandbox.paypal.com\r\n";

到

$header .= "Host: www.sandbox.paypal.com\r\n";

我现在收到 HTTP / 1.1 200 OK 响应。另一个问题是，我的if（）部分不起作用，它总是跳到最后一个

 else {
                throw new Exception("Unexpected response from PayPal: $res");
  }

if (strcmp ($res, "VERIFIED") == 0)是否有问题？

更新2： 这是我的完整代码。也许有人可以找到错误：

class Paypal {
    protected $sandbox = false;
    protected $data = null;

    const SANDBOX_URL = 'www.sandbox.paypal.com';
    const PAYPAL_URL = 'www.paypal.com';


    public function __construct($sandbox = false) { 
        $this->sandbox = $sandbox;
    }

    public function receiveData() {
        if (empty($_POST)) {
            throw new Exception('No $_POST data found');
        }
        $this->data = $_POST;
        // Read the notification from PayPal and create the acknowledgement response
        $req = 'cmd=_notify-validate';               // add 'cmd' to beginning of the acknowledgement you send back to PayPal

        foreach ($_POST as $key => $value) {         // Loop through the notification NV pairs
            $value = urlencode(stripslashes($value));  // Encode the values
            $req .= "&$key=$value";                    // Add the NV pairs to the acknowledgement
        }

        if ($this->fsock($req))
            return true;
        else
            return false;
    }

    public function getData() {
        return $this->data;
    }

    private function fsock($data) {
        //Open a socket for the acknowledgement request
        $fp = fsockopen ('ssl://'.$this->getURL(), 443, $errno, $errstr, 30);

        if (!$fp) { 
            // fsockopen error
            throw new Exception("An error occured while using fsockopen(): [$errno] $errstr");
        } 

        //Set up the acknowledgement request headers
        $header .= "POST /cgi-bin/webscr HTTP/1.1\r\n";
        $header .= "Host: ".$this->getURL()."\r\n";
        $header .= "Content-Type: application/x-www-form-urlencoded\r\n";
        $header .= "Content-Length: ".strlen($data)."\r\n";
        $header .= "Connection: Close\r\n\r\n";

        // Post request back to PayPal for validation
        fputs ($fp, $header . $data);
        while (!feof($fp)) {                     // While not EOF
            $res = fgets ($fp, 1024);              // Get the acknowledgement response
            if (strcmp ($res, "VERIFIED") == 0)  {  // Response is VERIFIED
                $response = 'verified';
                // Notification protocol is complete, OK to process notification contents

                // Possible processing steps for a payment might include the following:

                // Check that the payment_status is Completed
                // Check that receiver_email is your Primary PayPal email
                // Check that payment_amount/payment_currency are correct
                // Process payment
            }
            else if (strcmp ($res, "INVALID") == 0)  { // Response is INVALID
                $response = 'invalid';
            } 
            else {
                throw new Exception("Unexpected response from PayPal: $res");
            }
        }
        fclose ($fp);  //close file pointer 
        if ($response == 'verified')
            return true;
        else
            return false;
    }

    private function getURL() {
        if ($this->sandbox) 
            return self::SANDBOX_URL;
        else                
            return self::PAYPAL_URL;
    }   
}

$paypal = new Paypal(true);
try {
    if ($paypal->receiveData()) {
        // success
    }
    else {
        // fail
    }
}
catch (Exception $e) {
    // exception
    echo 'Exception: ',  $e->getMessage(), "\n";
}

Answer 1

您的脚本似乎存在许多问题。例如，$ data未初始化，因此您不发布任何内容。但是你得到400错误的原因是因为 $ header。=“主持人：ssl：//www.sandbox.paypal.com \ r \ n”;

应该是

$ header。=“主持人：www.sandbox.paypal.com \ r \ n”;

Answer 2

我维护了一些当前的IPN程序，在我看来，您阅读数据的方法不太可能从PayPal获得完整的响应。 TCP数据以数据包形式发送，而PayPal响应不作为单个缓冲区发送，因此实际上单个读取实际上不太可能包含尽可能多的字节，直到请求的1,024个字节。

为了在你自己的代码中实现，你必须循环并附加到你读到的变量，直到达到EOF。

此外，您可以在此处查看此PHP示例代码：

https://www.x.com/developers/PayPal/documentation-tools/code-sample/216623

我认为我现在可以看到你的错误了。您的fgets语句一次只读取一行响应，因为它在达到长度或达到换行时停止读取，以先到者为准。您正在寻找的线是Pay Pal的响应体，而不是前几行（标题等）。然而你的else语句包含在循环中。因此，一旦从PayPal收到标题的第一行，就会执行else语句。

我建议两个改变。在循环之后移动失败代码，因为在达到EOF之前实际上并不确定失败。

我建议的另一个改变是使用strpos而不是strcmp。尽管paypal响应主体仅包含已验证的单个单词，但CR或LF或两者都很有可能成为fgets读取的那一行的一部分。所以strcmp会失败。您可以使用条件strpos ($res, "VERIFIED") !== false代替现有条件（以及检查是否收到INVALID的相同更改。

这是一些可能有效的可能的代码（我无法在您的情况下测试此代码，未经测试的代码永远无法确定是否正常工作）。请将此代码作为建议，而不是作为字面答案：

   // Post request back to PayPal for validation
    fputs ($fp, $header . $data);
    while (!feof($fp)) {                     // While not EOF
        $res = fgets ($fp, 1024);              // Get the acknowledgement response
        if (strpos ($res, "VERIFIED") !== false)  {  // Response is VERIFIED
            $response = 'verified';
            // Notification protocol is complete, OK to process notification contents

            // Possible processing steps for a payment might include the following:

            // Check that the payment_status is Completed
            // Check that receiver_email is your Primary PayPal email
            // Check that payment_amount/payment_currency are correct
            // Process payment
            break;
        }
        else if (strpos ($res, "INVALID") !== false)  { // Response is INVALID
            $response = 'invalid';
            break;
        } 
    }
    fclose ($fp);  //close file pointer 
    if ($response == 'verified')
        return true;
    else if ($response == 'invalid') {
            return false;
        }
    else { // no else statement is actually needed here,
           // since the previous conditions both return
        throw new Exception("Unexpected response from PayPal: $res");
        return false;
    }

Answer 3

你的If语句是正确的，你需要做的就是打印你正在检查的值标题/尾随字符的“已验证”：将这样的内容复制到你的else块中：

    var_dump($res) ; die;

所以你可以看到你得到的东西：）

Answer 4

请清理浏览器缓存或重新启动浏览器。

这肯定会解决您的错误请求问题。

Answer 5

套接字级HTTP通信使您的代码非常容易出错。我建议您使用像cURL这样的HTTP客户端库，它将为您处理请求/响应周期，遵循潜在的重定向和读/写标题/预告片。

PayPal IPN：HTTP / 1.1 400错误请求

5 个答案: