在登录asp.net上检测到PayPal订阅取消

Question

我正在构建一个涉及Paypal订阅的asp.net Web应用程序。 我需要检查是否可以取消用户登录，如果可以，怎么办？ 我已经看过有关此主题的其他文章，但由于要检查登录信息，因此情况有所不同。 我当时在想，也许我可以每晚从Paypal中批量转储数据，并进行检查以在已取消的用户上设置标记。 不确定执行此操作的最佳方法是..

Answer 1

如果要在登录到PayPal后检查用户是否接受或取消了协议，则可以使用Express Checkout令牌进行检查。 买方登录到PayPal帐户并在响应中查找变量BILLINGAGREEMENTACCEPTEDSTATUS之后，需要在令牌上调用GetExpressCheckoutDetails API。

BILLINGAGREEMENTACCEPTEDSTATUS = 0表示买方在登录PayPal帐户后未接受该协议 或未单击取消 。

BILLINGAGREEMENTACCEPTEDSTATUS = 1，表示在登录PayPal后点击“同意并继续” 。

我已经提供了一些样本回复。

登录后拒绝：

NVP Response:
TOKEN=EC-0RC04801KU663840M
**BILLINGAGREEMENTACCEPTEDSTATUS=0**
CHECKOUTSTATUS=PaymentActionNotInitiated
TIMESTAMP=2014-09-14T14:54:43Z
CORRELATIONID=5cc68231a1b35
ACK=Success
VERSION=109.0
BUILD=12786467
EMAIL=XXXXXXXXXXXXXX
PAYERID=XXXXXXXXXXXX
PAYERSTATUS=verified
FIRSTNAME=Eshan Personal Test
LASTNAME=Account
COUNTRYCODE=US
CURRENCYCODE=USD
AMT=0.00
SHIPPINGAMT=0.00
HANDLINGAMT=0.00
TAXAMT=0.00
INSURANCEAMT=0.00
SHIPDISCAMT=0.00
PAYMENTREQUEST_0_CURRENCYCODE=USD
PAYMENTREQUEST_0_AMT=0.00
PAYMENTREQUEST_0_SHIPPINGAMT=0.00
PAYMENTREQUEST_0_HANDLINGAMT=0.00
PAYMENTREQUEST_0_TAXAMT=0.00
PAYMENTREQUEST_0_INSURANCEAMT=0.00
PAYMENTREQUEST_0_SHIPDISCAMT=0.00
PAYMENTREQUEST_0_INSURANCEOPTIONOFFERED=false
PAYMENTREQUEST_0_ADDRESSNORMALIZATIONSTATUS=None
PAYMENTREQUESTINFO_0_ERRORCODE=0 

登录后接受：

NVP Response:
TOKEN=EC-1EX65013S71914041
PHONENUM=408-767-7151
**BILLINGAGREEMENTACCEPTEDSTATUS=1**
CHECKOUTSTATUS=PaymentActionNotInitiated
TIMESTAMP=2014-09-14T14:56:24Z
CORRELATIONID=aae4de7a4b356
ACK=Success
VERSION=109.0
BUILD=XXXXXXXXXXXXX
PAYERID=XXXXXXXXXXXXXX
PAYERSTATUS=verified
FIRSTNAME=Eshan Personal Test
LASTNAME=Account
COUNTRYCODE=US
SHIPTONAME=Eshan Personal Test Account
SHIPTOSTREET=cxas
SHIPTOSTREET2=asa
SHIPTOCITY=FL
SHIPTOSTATE=FL
SHIPTOZIP=95616
SHIPTOCOUNTRYCODE=US
SHIPTOCOUNTRYNAME=United States
ADDRESSSTATUS=Confirmed
CURRENCYCODE=USD
AMT=0.00
SHIPPINGAMT=0.00
HANDLINGAMT=0.00
TAXAMT=0.00
INSURANCEAMT=0.00
SHIPDISCAMT=0.00
PAYMENTREQUEST_0_CURRENCYCODE=USD
PAYMENTREQUEST_0_AMT=0.00
PAYMENTREQUEST_0_SHIPPINGAMT=0.00
PAYMENTREQUEST_0_HANDLINGAMT=0.00
PAYMENTREQUEST_0_TAXAMT=0.00
PAYMENTREQUEST_0_INSURANCEAMT=0.00
PAYMENTREQUEST_0_SHIPDISCAMT=0.00
PAYMENTREQUEST_0_INSURANCEOPTIONOFFERED=false
PAYMENTREQUEST_0_SHIPTONAME=Eshan Personal Test Account
PAYMENTREQUEST_0_SHIPTOSTREET=cxas
PAYMENTREQUEST_0_SHIPTOSTREET2=asa
PAYMENTREQUEST_0_SHIPTOCITY=FL
PAYMENTREQUEST_0_SHIPTOSTATE=FL
PAYMENTREQUEST_0_SHIPTOZIP=95616
PAYMENTREQUEST_0_SHIPTOCOUNTRYCODE=US
PAYMENTREQUEST_0_SHIPTOCOUNTRYNAME=United States
PAYMENTREQUEST_0_ADDRESSSTATUS=Confirmed
PAYMENTREQUEST_0_ADDRESSNORMALIZATIONSTATUS=None
PAYMENTREQUESTINFO_0_ERRORCODE=0