构建基于Node.js的AWS无服务器应用实战指南

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"《Serverless Application with Node.js》是一本于2019年出版的全英文技术书籍，专为读者讲解如何利用JavaScript在AWS上构建无服务器应用。作者Slobodan Stojanovic和Aleksandar Simovic通过实际案例引导读者，即围绕一个集成AWS服务（包括Lambda和API Gateway）的比萨店构建一个可扩展的事件驱动的无服务器应用程序。书中详尽地探讨了Claudia.js的作用，这是一个用于简化Lambda函数管理和部署的JavaScript库，它能够帮助开发者更高效地开发和部署无服务器架构。每一章都包含丰富的练习、实例、提示和实用技巧，确保读者能够将所学知识应用到实际工作中。读者不仅能学习到Node.js的基础知识，还能深入了解如何将其与AWS的Serverless架构相结合，提升应用程序的性能、可扩展性和成本效益。此外，本书还提供了Gojko Adžic的序言，为读者提供了来自行业专家的观点和见解。在购买和获取本书时，可通过Manning Publications官方网站或邮件联系Special Sales Department获取折扣信息。该书强调版权保护，未经出版商Manning Publications事先书面许可，任何形式的复制、存储或传输都是不允许的。书中还提及了一些制造商和卖家使用的商标，以区分其产品。《Serverless Application with Node.js》是一本适合对Node.js和AWS Serverless技术感兴趣的开发者深入学习和实践的实用指南，无论是对于初学者还是有经验的开发者，都能从中收获宝贵的知识和实践经验。"

xiv

acknowledgments

xiv

Our thanks also go to Amazon and AWS teams for creating such an amazing comput-

ing service: AWS Lambda. You are changing the world.

Lastly we’d like to thank Aunt Maria and all other imaginary characters from the book!

xvi

about this book

xvi

serverless Node.js app looks like and nd out what Claudia.js is and how it helps

you to deploy Node.js apps to AWS Lambda.

¡Chapter 2 shows you how to develop a simple Pizzeria API using AWS Lambda,

API Gateway, and Claudia API Builder. It also teaches you how to deploy your API

with a single command using Claudia.

¡Chapter 3 teaches you how databases work in serverless architecture, and it

teaches you how to connect your Pizzeria API with the DynamoDB, a serverless

database offered by AWS.

¡Chapter 4 teaches you how to connect Pizzeria API with third-party services, such

as Some Like It Hot delivery API. It also shows you some common issues you

might face when using promises with Claudia API Builder.

¡Chapter 5 helps you learn how to nd errors in your serverless applications, how

to debug them, and what debugging tools you have at your disposal.

¡Chapter 6 shows you how to implement authentication and authorization in your

serverless application. You’ll learn the difference between authentication and

authorization in a serverless environment, how to implement a web authoriza-

tion mechanism using AWS Cognito, and how to identify your users using a social

provider.

¡Chapter 7 takes a dive into serverless le storage possibilities and examines how

to create a separate le processing function that uses the storage and provides

requested les to your other Lambda -- your serverless API.

Part 2 covers how to create additional serverless applications that work with the same

resources, how to create chatbots, voice assistants, SMS chatbots, how to add NLP, and

how you should organize all those serverless applications together.

¡Chapter 8 shows how to develop your rst Facebook Messenger chatbot and how

Claudia Bot Builder helps you do that in just several lines.

¡Chapter 9 shows how to add simple NLP (natural language processing) to your

chat bot, connect your chatbot to your DynamoDB database, and send delayed

responses when a delivery is in progress (an asynchronous event).

¡Chapter 10 shows how to develop your rst Alexa skill and a Twilio SMS chatbot,

and how with Claudia Bot Builder you can do that incredibly fast.

Part 3 covers the more advanced topics on how to test, architect your serverless apps,

and migrate your existing applications to serverless. It also gives recommendations,

general patterns, and solutions to common issues and frequent questions. It also show-

cases two medium scaled companies that went serverless.

¡Chapter 11 teaches you about testing serverless applications, writing testable

serverless functions, and running automated tests locally. Along with that, it

explains Hexagonal Architecture and how to refactor your serverless applica-

tions to make them easier to test and to remove potential risks.

xvii

about this book

xvii

¡Chapter 12 covers processing payments with serverless applications, implement-

ing payments to your serverless API, and understanding the PCI compliance in

payment processing.

¡Chapter 13 makes sure you know all about running Express.js applications in

AWS Lambda and the serverless ecosystem, serving static content from an

Express.js application, connecting to MongoDB from a serverless Express.js

application, and understanding the limitations and risks of Express.js apps in a

serverless ecosystem.

¡Chapter 14 covers how to approach migrating to serverless, structuring your

app according to serverless provider characteristics, organizing your applica-

tion architecture so it's business-oriented and able to grow, and dealing with

the architectural differences between serverless and traditional server-hosted

applications.

¡Chapter 15 teaches you how CodePen uses serverless for its preprocessors ensur-

ing hundreds of millions of requests, and how MindMup serves 400,000 active

users with a two-person team and serverless.

About the code

This book contains many examples of source code both in numbered listings and

inline with normal text. In both cases, source code is formatted in a xed-width font

like this

` to separate it from ordinary text. Sometimes it is also in bold to highlight

code that has changed from previous steps in the chapter, such as when a new feature

adds to an existing line of code.

In many cases, the original source code has been reformatted; we’ve added line

breaks and reworked indentation to accommodate the available page space in the

book. Additionally, comments in the source code have often been removed from the

listings when the code is described in the text. Code annotations accompany many of

the listings, highlighting important concepts.

Source code for the examples in this book is available for download from the publish-

er’s website at https://manning.com/books/serverless-apps-with-node-and-claudiajs

Book forum

Your purchase of Serverless Applications with Node.js includes free access to a private web

forum section run by Manning Publications where you make comments about the

book, ask technical questions, and receive help from the authors and other users. To

access the forum, point your web browser to https://forums.manning.com/forums/

serverless-apps-with-node-and-claudiajs. You can also learn more about Manning’s

forums and the rules of conduct at https://forums.manning.com/forums/about.

Manning’s commitment to our readers is to provide a venue where a meaningful dia-

log between individual readers and between readers and the authors can take place. It

is not a commitment to any specic amount of participation on the part of the authors,

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