PayPal API开发与实战指南：构建支付流程
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立即下载 《PayPal APIs：构建和运行》是一本由Michael Balderas撰写的专业开发人员指南，英文原名为PayPal APIs: Up and Running。该书出版于2011年2月，由O'Reilly Media发行，适用于那些依赖于快速、便捷交易的Web和移动应用开发者。作者以英文写作，覆盖了美国地区，旨在帮助读者了解并充分利用PayPal的各种支付解决方案。
本书的核心内容包括以下几个章节：
1. **第1章：PayPal API** - 介绍了PayPal的基本接口，为开发者提供如何与PayPal系统交互的指导，包括API的工作原理和基本操作。
2. **第2章：PayPal Express Checkout** - 着重探讨PayPal的Express Checkout功能，包括其独特的流程和四种操作方法，适合处理在线交易，如产品和服务购买、捐款等。
3. **第3章：PayPal Website Payments Pro** - 详细讲解如何通过Website Payments Pro实现直接支付，这对于需要接受在线付款的网站来说非常重要。
4. **第4章：PayPal Adaptive Payments** - 探讨如何设置权限级别，利用Adaptive Payments在项目中灵活管理资金流动，支持多种支付场景。
5. **第5章：PayPal Mobile Express Checkout** - 针对iOS和Android平台的移动应用，讲解如何利用Mobile Express Checkout功能进行移动支付，并提供了相关的最佳实践和库。
此外，书中还提供了PHP和Objective-C的示例代码，以及如何在沙箱环境中测试PayPal集成，确保开发过程中的稳定性和安全性。版权信息表明，本书受法律保护，仅限教育、商业或销售推广用途。
《PayPal APIs：构建和运行》是一本实用的指南，无论开发者是否具有丰富的API编程经验，都能帮助他们熟练掌握PayPal的各项服务，提升应用程序的支付处理能力。
for integration using the NVP API. There are SDKs are provided for Java, ASP.NET,
PHP, Coldfusion, and Ruby. This type of integration typically wraps the HTTPS in-
terfaces in the respective language, making the operations more natural for the devel-
oper to work with, because they are formatted in a familiar language and require just
a few simple function calls to access.
Testing Versus Live Implementation
PayPal provides a sandbox environment to use while developing your application. The
environment replicates the live environment, but true payment processing doesn’t oc-
cur when using the sandbox. Once you have fully developed and debugged your ap-
plication, you can then switch to the live environment and start taking payments.
Switching between the two is as simple as changing the target server and the API cre-
dentials used to access the server. The rest of your application will remain unchanged.
I recommend setting up your API credentials in separate files within
your application. This way, you can have your sandbox credentials in
one file and your production credentials in another file, referenced ac-
cordingly. For added security, I would locate these files on your server
outside the default webroot, so that they cannot be called directly from
the web browser.
Obtaining API Credentials
To access the NVP API, you first need to establish credentials. These identify who you
are and ensure payments get to where they need to go. You establish credentials through
either an API signature or an API certificate. You will need two sets of API credentials:
one for development and one for production.
Creating an API Signature
Developing your application only requires access to the PayPal API sandbox. You can
sign up for access to the sandbox at http://developer.paypal.com or http://x.com. Once
your account is established, you can create your test accounts and obtain your API
credentials. Sandbox accounts and live accounts require different processes to obtain
credentials. Use the following steps for a sandbox account:
1. Go to https://developer.paypal.com and click “Sign Up Now.”
2. Enter the requested information and click “Agree and Submit.”
3. PayPal will send you an email to complete the sign-up process.
4. After confirming your email address, click “Sign Up Now” to access the sandbox.
4 | Chapter 1: The PayPal API
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