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作者分享了为 ActivityPub 机器人框架(ActivityBot,NLnet 资助项目)编写单元测试时遇到的四大难题:用户名与域名校验、消息验证、HTTP 签名的生成与重放,以及与外部服务器的真实互操作测试。
The article explains the complexities of implementing the ActivityPub protocol, such as handling multiple HTTP signature standards and JSON-LD contexts, and introduces Fedify, a TypeScript framework designed to simplify building ActivityPub applications.