PayPal API一直无法正常工作

如何解决PayPal API一直无法正常工作

我们的大多数API调用都可以成功工作并存储到我们的数据库中，但很少有。我已经收集了一些日志，我们收到了“错误400错误的请求”。

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[29-Sep-2020 08:04:48 UTC]未验证错误101：HTTP / 1.1 400错误的请求

[29-Sep-2020 08:04:48 UTC]未验证错误101：连接：关闭

[2020年9月29日UTC]未验证错误101：内容长度：11

[2020年9月29日UTC]未验证错误101：内容类型：文本/纯文本； charset = utf-8

[2020年9月29日UTC]未验证错误101：

[29-Sep-2020 08:04:48 UTC]未验证错误101：错误的请求

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日志：https://pastebin.com/hRjrgWGd

代码：

    $header .= "POST /cgi-bin/webscr HTTP/1.1\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "HOST: www.paypal.com:443\r\n";
$header .= "Connection close\r\n";
$header .= "Content-Length: " . strlen($req) . "\r\n\r\n";

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

if (!$fp)
{
    // HTTP ERROR
    echo "error";
    error_log("FAILED line 53");

} else {
    // NO HTTP ERROR

    fputs ($fp,$header . $req);


    while (!feof($fp))
    {
        $res = fgets($fp,1024);

        if (strcmp (trim($res),"VERIFIED") == 0) {
            //Setup Required Variables
            $txn_id = $_POST['txn_id'];
            $first_name = $_POST['first_name'];
            $last_name = $_POST['last_name'];
            $cust_name = $first_name .' '. $last_name;
            $cust_email = $_POST['payer_email'];
            $cust_id = $_POST['auction_buyer_id'];
            $cust_status = $_POST['payer_status'];
            $payment_date = $_POST['payment_date'];
            $currency = $_POST['mc_currency'];

            $address_street = $_POST['address_street'];
            $address_city = $_POST['address_city'];
            $address_state = $_POST['address_state'];
            $address_zip = $_POST['address_zip'];
            $address_country = $_POST['address_country'];
            $address_status = $_POST['address_status'];

            $g_ref = "";

            if (isset($_POST['fulfillment_order_reference_number'])) {
                $g_ref = $_POST['fulfillment_order_reference_number'];
                $address_street = $_POST['fulfillment_address_line1'];
                $address_city = $_POST['fulfillment_address_city'];
                $address_state= $_POST['fulfillment_address_state'];
                $address_zip = $_POST['fulfillment_address_zip'];
            }

            $item_count = $_POST['num_cart_items'];

            //Misc Variables Requried for Authentication
            $payment_status = $_POST['payment_status'];
            $receiver_email = $_POST['receiver_email'];
            $our_email = '###'; #PP EMAIL HERE
            $our_email_2 = '###'; #PP EMAIL HERE

            if (($payment_status == 'Completed') && (($receiver_email == $our_email) || ($receiver_email == $our_email_2)))
            {
                //Check Transaction Not Already Processed
                //  $check = $db_query->duplicate_check($txn_id);
                //  if ($check != 0) { exit(); }

                //Distinguish between accounts
                if ($receiver_email == $our_email) {
                    $pp_acc = "CB";
                } else if ($receiver_email == $our_email_2) {
                    $pp_acc = "IK";
                }

                for ($n=1;$n<=$item_count;$n++) {
                    $item_name = $_POST['item_name'. $n];
                    $item_quantity = $_POST['quantity'. $n];
                    $item_number = $_POST['item_number'. $n];
                    $total_paid = $_POST['mc_gross_'. $n];
                    error_log("HIT ADD ORDER tx: $txn_id");

                    //Add Order to DB (Removed)
                }
            }
        }
        else if (strcmp ($res,"INVALID") == 0) {
            error_log("Invalid Error 102");

        }
        else {
            // This is where it seems to be hitting
            error_log("not verified Error 101: " . $res);
        }
    }
}

fclose ($fp);

似乎feof（$ fp）读到请求数据的末尾，但是那些没有保存到数据库的数据并没有命中VERIFIED的'if'语句，而是'else'。

我已经检查了PayPal IPN历史记录，并且所有请求都已成功发送，因此这绝对是我们的服务器问题。在2016年至2018年这不是问题，但是从那以后，我们就一直没有将其保存到数据库中。

有什么想法吗？

解决方法

如IPN Integration Guide中所述，请确保在请求标头中包含一个User-Agent: 字段，该字段的值应是大于7个字符的任何字符串

您还应该使用到ipnpb.paypal.com的HTTPS / SSL连接（标准端口443），不确定为什么代码使用旧的www.paypal.com端点进行IPN。