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所在平台: Udemy |
课程主页: https://www.udemy.com/course/learning-koajs-by-building-rest-apis/
课程评论：没有评论
## Coursera 课程总结：Node.js - 通过构建 REST API 学习 Koa.js 本课程专注于 **Koa.js**，一个由 Express.js 团队开发的新型 Web 框架。Koa.js 旨在为 Web 应用程序和 API 提供一个更小巧、更具表现力且更健壮的基础。 **Koa.js 的核心优势：** * **告别回调地狱：** 利用生成器（generators）和 Promise，Koa.js 实现了基于 Promise 的流程控制，极大地改善了错误处理，并消除了传统回调函数带来的复杂性。 * **模块化和灵活性：** Koa.js 核心不包含任何中间件，而是提供了一套优雅的方法，使得编写服务器和中间件更加快速和愉快。许多 Express.js 中常见的“好东西”在 Koa.js 中被移至了中间件层，例如签名 Cookie 密钥等。这使得中间件的编写更加舒适且不易出错。 * **更优的体验：** Koa.js 提供了更好的错误处理（通过 `try/catch`）、更完善的流（stream）处理以及整体上更佳的用户体验。 **Koa.js 与 Express.js 的关系：** Koa.js 并非 Express.js 4.0 的直接升级。它在设计上与 Express.js 有着根本性的差异。从 Express.js 3.0 迁移到 Koa.js 几乎相当于重写整个应用程序，因此 Koa.js 被设计为一个全新的库。 **通过本课程您将学到：** * **Koa.js 的基础知识** * **从零开始构建 API** * **集成 Koa.js 与 Sequelize** * **在 Koa.js 中使用 MySQL** * **在 Sequelize 中添加模型之间的关系** * **为 Koa.js 和 Sequelize 添加身份验证** * **为 REST API 添加文档** 总之，本课程将帮助您掌握 Koa.js 的精髓，并通过实际动手构建 REST API 的过程，深入理解如何在 Node.js 生态系统中构建现代化、高效的 Web 服务。
What is Koa.js? Koa is a new web framework designed by the team behind Express, which aims to be a smaller, more expressive, and more robust foundation for web applications and APIs. Through leveraging generators Koa allows you to ditch callbacks and greatly increase error-handling. Koa does not bundle any middleware within core, and provides an elegant suite of methods that make writing servers fast and enjoyable. Does Koa replace Express? Koa is more like Connect, but a lot of the Express goodies were moved to the middleware level in Koa to help form a stronger foundation. Koa makes middleware more enjoyable and less error-prone to write, for the entire stack, not just the end application code. Typically many middleware would re-implement similar features, or even worse incorrectly implement them, when features like signed cookie secrets among others are typically application-specific, not middleware specific. Why is not Koa Express4.0? Koa is a pretty large departure from what people know about Express, the design is fundamentally much different, so the migration from Express 3.0 to this Express 4.0 would effectively mean rewriting the entire application, so we thought it would be more appropriate to create a new library. Why you should learn Koa? Promise based flow in KoaNo Callbacke hell in KoaBetter error handling through try/catch in KoaKoa is more modularBetter user experience in KoaProper stream handling in Koa What you will learn in this course Fundamentals of KoaBuilding API from scratch in KoaIntegrating Koa with SequelizeHow to use Mysql with KoaAdding relationship between models in SequelizeAdding authentication in Koa and SequelizeAdding documentation for REST APIS in Koa
