有人可以向我展示“hello world”吗？贝宝IPN？
我想设置一个 PayPal 捐款箱，并使用他们的 IPN 协议来监控捐款何时到达。该文档非常复杂，并且充满了我不感兴趣的功能。是否有一个简短的片段 - 最好是用 Python 编写的——这展示了如何连接到 Paypal，永远循环，并在每次捐款进来时打印“刚刚收到 5 美元”？
I'd like to set up a PayPal donation box, and use their IPN protocol to monitor when donations come in. The documentation is enormously complex and full of features I'm not interested in. Is there a short snippet -- ideally in Python -- that shows how to, say, connect to Paypal, loop forever, and print "Just got $5" every time a donation comes in?
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事实上，对于 IPN，情况正好相反。付款后，PayPal 通过 HTTP POST 向您的服务器发布通知。因此，您需要制作一个 CGI 脚本或服务器来接收这些帖子、检查其有效性并处理它们。
设置 IPN 处理器最简单的示例代码可能是 PHP 示例代码：
https://cms.paypal.com/cms_content/US/en_US/files/developer/IPN_PHP_41.txt
但有一整套代码片段：
https://github.com/paypal/ipn-code-samples
您不应该跳过官方文档，因为它涵盖了如何管理设置和测试 IPN。它位于：
https://www.paypalobjects.com/webstatic /en_US/developer/docs/pdf/ipnguide.pdf
特别是，请参阅第 2-4 章。
Actually, with IPNs it's the other way around. PayPal posts a notification to your server via HTTP POST when a payment is made. You therefore need to make a CGI script or server that receives these posts, checks their validity, and processes them.
Probably the easiest sample code to look at for setting up an IPN processor is the PHP sample code at:
https://cms.paypal.com/cms_content/US/en_US/files/developer/IPN_PHP_41.txt
but there's a whole set of code snippets at:
https://github.com/paypal/ipn-code-samples
You shouldn't skip the official documentation because it covers how to administratively set up, and test, IPNs. It's at:
https://www.paypalobjects.com/webstatic/en_US/developer/docs/pdf/ipnguide.pdf
In particular, see chapters 2-4.