如何解决一次交易接收多条IPN消息（内容相同）答案

【问题标题】：How to solve receiving multiple IPN messages (same content) in one transaction如何解决一次交易接收多条IPN消息（内容相同）
【发布时间】：2012-05-05 17:18:44
【问题描述】：

我正在使用 Codeigniter paypal_lib 测试我的购物车结账。我从沙盒消息中获得的结果：“VERIFIED”以及函数“validate_ipn”返回 true。但我在这里面临的问题是我的日志文件和订单数据不时包含来自贝宝的相同数据。

下面是我的ipn验证：

function validate_ipn(){

    $url_parsed = parse_url($this->paypal_url);       
    $post_string="cmd=_notify-validate";     
    if ($this->CI->input->post())
    {
        foreach ($this->CI->input->post() as $field=>$value)
        { 
            $this->ipn_data[$field] = $value;
            $post_string .= '&' . $field.'='.urlencode(stripslashes($value));
        }
    }

    //$fp = fsockopen($url_parsed['host'],"80",$err_num,$err_str,30); 
            $fp = fsockopen('ssl://www.sandbox.paypal.com', 443, $err_num, $err_str, 30);
    if(!$fp)
    {
        $this->last_error = "fsockopen error no. $errnum: $errstr";
        $this->log_ipn_results(false);       
        return false;
    } 
    else
    { 
        fputs($fp, "POST $url_parsed[path] HTTP/1.1\r\n"); 
        fputs($fp, "Host: $url_parsed[host]\r\n"); 
        fputs($fp, "Content-type: application/x-www-form-urlencoded\r\n"); 
        fputs($fp, "Content-length: ".strlen($post_string)."\r\n"); 
        fputs($fp, "Connection: close\r\n\r\n"); 
        fputs($fp, $post_string . "\r\n\r\n"); 

        // loop through the response from the server and append to variable
        while(!feof($fp))
            $this->ipn_response .= fgets($fp, 1024); 

        fclose($fp); // close connection
    }

    if (eregi("VERIFIED",$this->ipn_response))
    {
        // Valid IPN transaction.
        $this->log_ipn_results(true);
        return true;         
    } 
    else 
    {
        $this->last_error = 'IPN Validation Failed.';
        $this->log_ipn_results(false);  
        return false;
    }
}

这是我在日志中得到的（没有什么不同）。很多这样的消息：

[04/24/2012 9:31 AM] - SUCCESS!
IPN POST Vars from Paypal:
mc_gross=11.00, protection_eligibility=Eligible, address_status=confirmed
, item_number1=3, tax=0.00, item_number2=5, payer_id=T4WYEY49NUK4Y, item_number3=6, address_street=1 Maire-Victorin, payment_date=00:28:18 Apr 24, 
2012 PDT, payment_status=Pending, charset=windows-1252, address_zip=M5A 1E1, mc_shipping=0.00, mc_handling=0.00, first_name=Test, address_country_code=CA, 
address_name=Test User, notify_version=3.4, custom=292aaf2e76b586a80c20f13c5b1d6997, payer_status=verified, business=tham21_1297141093_biz@yahoo.com, 
address_country=Canada, num_cart_items=3, mc_handling1=0.00, mc_handling2=0.00, mc_handling3=0.00, address_city=Toronto, verify_sign=AQwZI3e5UUeRN1fFRRAZwba0SCKvAK5Jh7SdLhAZdWaitG4t3SzIzk6D,
payer_email=tham21_1297133813_per@yahoo.com, mc_shipping1=0.00, mc_shipping2=0.00, mc_shipping3=0.00, tax1=0.00, tax2=0.00, tax3=0.00, txn_id=19366377KU1661939, 
payment_type=instant, last_name=User, address_state=Ontario, item_name1=Test 003 Product, receiver_email=tham21_1297141093_biz@yahoo.com, item_name2=Test 005 Product, 
item_name3=Test 006 Product, quantity1=1, quantity2=1, receiver_id=C7F8469MV6QVN, pending_reason=multi_currency, quantity3=1, txn_type=cart, mc_gross_1=2.00, mc_currency=EUR, 
mc_gross_2=4.00, mc_gross_3=5.00, residence_country=CA, test_ipn=1, transaction_subject=292aaf2e76b586a80c20f13c5b1d6997, payment_gross=, ipn_track_id=95d4aa9eb8b34, 

IPN Response from Paypal Server:
 HTTP/1.1 200 OK

8
VERIFIED
0



[04/24/2012 9:33 AM] - SUCCESS!
IPN POST Vars from Paypal:
mc_gross=11.00, protection_eligibility=Eligible, address_status=confirmed
, item_number1=3, tax=0.00, item_number2=5, payer_id=T4WYEY49NUK4Y, item_number3=6, address_street=1 Maire-Victorin, payment_date=00:28:18 Apr 24, 
2012 PDT, payment_status=Pending, charset=windows-1252, address_zip=M5A 1E1, mc_shipping=0.00, mc_handling=0.00, first_name=Test, address_country_code=CA, 
address_name=Test User, notify_version=3.4, custom=292aaf2e76b586a80c20f13c5b1d6997, payer_status=verified, business=tham21_1297141093_biz@yahoo.com, 
address_country=Canada, num_cart_items=3, mc_handling1=0.00, mc_handling2=0.00, mc_handling3=0.00, address_city=Toronto, verify_sign=AQwZI3e5UUeRN1fFRRAZwba0SCKvAK5Jh7SdLhAZdWaitG4t3SzIzk6D, 
payer_email=tham21_1297133813_per@yahoo.com, mc_shipping1=0.00, mc_shipping2=0.00, mc_shipping3=0.00, tax1=0.00, tax2=0.00, tax3=0.00, txn_id=19366377KU1661939, 
payment_type=instant, last_name=User, address_state=Ontario, item_name1=Test 003 Product, receiver_email=tham21_1297141093_biz@yahoo.com, item_name2=Test 005 Product, 
item_name3=Test 006 Product, quantity1=1, quantity2=1, receiver_id=C7F8469MV6QVN, pending_reason=multi_currency, quantity3=1, txn_type=cart, mc_gross_1=2.00, mc_currency=EUR, 
mc_gross_2=4.00, mc_gross_3=5.00, residence_country=CA, test_ipn=1, transaction_subject=292aaf2e76b586a80c20f13c5b1d6997, payment_gross=, ipn_track_id=95d4aa9eb8b34, 

IPN Response from Paypal Server:
 HTTP/1.1 200 OK
Date: Tue, 24 Apr 2012 07:33:44 GMT

8
VERIFIED
0

【问题讨论】：

我现在也遇到了同样的问题
很奇怪——你是如何将IPN url传递给paypal的？ IIRC，您可以在您的帐户中设置它，您可以在付款过程中传递它。想知道两者都做是否会导致两个通知？另外，不要打折 Paypal 错误。我已经解决了几个问题，这些问题需要与他们的员工进行多次长时间的电话通话，并导致他们采取了一些行动来解决它。检查您的出站流程和帐户，然后我建议您与他们联系。关于同一件事的两个通知，相隔 2 分钟似乎......很奇怪。间歇性的？

标签： paypal paypal-ipn

【解决方案1】：

即使发生这种情况也很烦人，但在 PayPal 最终解决问题之前，您需要制定保护措施，这样您就不会两次处理相同的付款。

最常见的解决方案是将数据库中的事务标记为已处理，更改状态字段或添加日期。然后检查每个 IPN 消息上的这个值，如果它已经设置忽略 IPN（但记录它）。

【讨论】：