缺少PAYPAL IPN自定义字段

我在使用API流程和沙箱实现paypal定期支付时遇到了麻烦。 我成功地创建了订阅按钮，并将用户重定向到paypal express结帐页面。 但是paypal生成的一些IPN中缺少自定义字段，我真的需要这个字段

以下是生成订阅按钮时发送的请求：

METHOD=SetExpressCheckout
&VERSION=94.0
&PWD=123456
&USER=myEmail@biz.com
&SIGNATURE=mySignature
&PAYMENTREQUEST_0_AMT=5.00
&PAYMENTREQUEST_0_PAYMENTACTION=Sale
&PAYMENTREQUEST_0_CURRENCYCODE=EUR
&RETURNURL=http%3A%2F%2Fwww.myWebSite.com?ok
&CANCELURL=http%3A%2F%2Fwww.myWebSite.com?ko
&L_BILLINGTYPE0=RecurringPayments
&L_BILLINGAGREEMENTDESCRIPTION0=test+paypal
&REQCONFIRMSHIPPING=0
&NOSHIPPING=1
&L_PAYMENTREQUEST_0_ITEMCATEGORY0=Digital
&L_PAYMENTREQUEST_0_NAME0=test+paypal
&L_PAYMENTREQUEST_0_AMT0=5.00
&L_PAYMENTREQUEST_0_QTY0=1
&PAYMENTREQUEST_0_CUSTOM=custom_var1%3Dvalue1%7Ccustom_var2%3Dvalue2

在用户确认交易后，他将返回我的网站，我必须验证信息并创建定期profil。 以下是我的要求：

METHOD=GetExpressCheckoutDetails
&VERSION=94.0
&PWD=123456
&USER=myEmail@biz.com
&SIGNATURE=mySignature
&TOKEN=theToken


METHOD=CreateRecurringPaymentsProfile
&VERSION=94.0
&PWD=123456
&USER=myEmail@biz.com
&SIGNATURE=mySignature
&TOKEN=theToken
&AMT=5.00
&CURRENCYCODE=EUR
&PROFILESTARTDATE=2013-02-04T15%3A16%3A24%2B01%3A00
&BILLINGPERIOD=Day
&BILLINGFREQUENCY=1
&DESC=test+paypal


METHOD=DoExpressCheckoutPayment
&VERSION=94.0
&PWD=123456
&USER=myEmail@biz.com
&SIGNATURE=mySignature
&TOKEN=theToken
&PAYERID=JZUVX4TAHRHRU
&PAYMENTREQUEST_0_PAYMENTACTION=Sale
&PAYMENTREQUEST_0_AMT=5.00
&PAYMENTREQUEST_0_CURRENCYCODE=EUR
&PAYMENTREQUEST_0_NOTIFYURL=http%3A%2F%2Fwww.myWebSite.com?notify
&PAYMENTREQUEST_0_CUSTOM=custom_var1%3Dvalue1%7Ccustom_var2%3Dvalue2

完成此操作后，我收到以下IPN：

Array
(
    [transaction_subject] => test paypal
    [payment_date] => 06:01:52 Feb 04, 2013 PST
    [txn_type] => express_checkout
    [last_name] => numerik
    [residence_country] => FR
    [item_name] => 
    [payment_gross] => 
    [mc_currency] => EUR
    [payment_type] => instant
    [protection_eligibility] => Ineligible
    [verify_sign] => myVerifySign
    [payer_status] => verified
    [test_ipn] => 1
    [tax] => 0.00
    [payer_email] => myEmail@per.com
    [txn_id] => 6XC11065S3796804E
    [quantity] => 1
    [receiver_email] => myEmail@biz.com
    [first_name] => buyer
    [payer_id] => myPayerId
    [receiver_id] => myReceiverId
    [item_number] => 
    [handling_amount] => 0.00
    [payment_status] => Completed
    [payment_fee] => 
    [mc_fee] => 0.42
    [shipping] => 0.00
    [mc_gross] => 5.00
    [custom] => custom_var1=value1|custom_var2=value2
    [charset] => windows-1252
    [notify_version] => 3.7
    [ipn_track_id] => ab76ea3421261
)

Array
(
    [payment_cycle] => Daily
    [txn_type] => recurring_payment_profile_created
    [last_name] => numerik
    [next_payment_date] => 02:00:00 Feb 04, 2013 PST
    [residence_country] => FR
    [initial_payment_amount] => 0.00
    [currency_code] => EUR
    [time_created] => 06:01:47 Feb 04, 2013 PST
    [verify_sign] => myVerifySign
    [period_type] =>  Regular
    [payer_status] => verified
    [test_ipn] => 1
    [tax] => 0.00
    [payer_email] => myEmail@per.com
    [first_name] => buyer
    [receiver_email] => myEmail@biz.com
    [payer_id] => myPayerId
    [product_type] => 1
    [shipping] => 0.00
    [amount_per_cycle] => 5.00
    [profile_status] => Active
    [charset] => windows-1252
    [notify_version] => 3.7
    [amount] => 5.00
    [outstanding_balance] => 0.00
    [recurring_payment_id] => myRecurringPaymentId
    [product_name] => test paypal
    [ipn_track_id] => a8adfdf8b61d3
)

正如您在第一个IPN中看到的，自定义字段可用，但在第二个IPN中不可用。

---

有人知道我在第二个IPN中检索自定义字段时缺少了什么吗？

您最好的选择是将

PROFILEREFERENCE

添加到您的CreateRecurringPaymentsProfile调用中。它将在IPN中以

rp\u invoice\u id

的形式返回，您的DoExpressCheckoutPayment请求包含自定义参数，这就是您为该交易返回该参数的原因。CreateRecurringPaymentsProfile请求未包含自定义参数，因此不会返回

---

这就是说，CRPP似乎无法使用自定义参数，因此您需要在本地保存数据，并在CRPP请求的PROFILEREFERENCE参数中包含本地记录ID。这样，它将按照Matt Cole建议的rp\u invoice\u id返回IPN，您可以使用该记录id相应地从数据库中提取自定义数据。

感谢您提供的提示，这将非常有用。感谢您的回复，但Andrew的回答更详细。这是否有文档记录？我一点也看不见