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Architect_Programmer_Code Agriculture Network»Architect › Programming › .Net/C # › . Net integration PayPal IPN return value has always been INVALID
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[Source] . Net integration PayPal IPN return value has always been INVALID

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Posted on 5/28/2019 4:16:05 PM | | | |
First, the Immediate Payment Notice (IPN) document link:The hyperlink login is visible.

Once the server receives an instant payment notification, you will need to confirm it by building an HTTP POST sent to PayPal. Your POST should be sent to:The hyperlink login is visible.

(when you receive it). You also need to append a variable named "cmd" with a value of "_notify-validate" (e.g., cmd=_notify-validate) to the POST string.

PayPal will reply to the POST with the word "VERIFIED"or"INVALID”。


VERIFIED: Validation is successful, INVALID means validation failed.

Solution:

Modify the character encoding of PayPal and find "Settings - Sales Tools - PayPal Button Language Encoding - More Encoding Options", as shown in the figure below:



Set "Do you want to use the same encoding (e.g., IPN, downloadable logs, emails) in the data that PayPal sends you?" "Encoded as UTF-8.

My Code:



Try to commit with postman, and it also returns "VERIFIED", as shown below:






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