Node.js与Express.js Web开发实战全书（2014年版）

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《Web Development with Node and Express 2014》是由Ethan Brown编著的一本英文专业书籍，专注于介绍如何使用Node.js和Express框架进行Web开发。这本书在2014年首次出版，版权由Ethan Brown持有，所有权利受到保护。该书是针对那些希望理解和掌握现代JavaScript后端开发技术的学习者和开发者设计的，特别强调了Node.js作为事件驱动、非阻塞I/O模型的轻量级服务器平台，以及Express作为基于Express框架的web应用开发工具。 Node.js以其高效的性能和异步编程模型闻名，它使得处理大量并发连接变得更加容易。而Express则是Node.js生态系统中最受欢迎的web应用框架之一，它提供了一系列强大的功能，如路由、中间件和模板引擎，简化了构建复杂Web应用的过程。书中详细讲解了如何安装和配置Node.js，如何创建和组织项目结构，以及如何利用Express进行HTTP请求处理、错误处理和路由配置。作者Ethan Brown以深入浅出的方式，带领读者逐步探索Node.js的核心概念，如事件循环、回调函数和Promise等，确保读者对这些关键概念有扎实的理解。他还涵盖了如何使用Express构建RESTful API、实现数据存储（如MongoDB）、以及如何处理静态文件和错误处理的最佳实践。此外，书中还包含了许多实用的示例代码，便于读者在实践中学习和应用。《Web Development with Node and Express》不仅适合初学者入门，也是经验丰富的开发者的参考手册，能够帮助他们提升Node.js和Express框架的运用能力。本书的修订历史表明，它持续关注最新技术和最佳实践，以保持与行业发展的同步。如果你正在寻找一本全面的Node.js和Express教程，或者想要深入了解这两种技术如何协同工作，那么这本2014年的第一版无疑是值得阅读和研究的资源。在线版本也提供了便利，便于随时随地查阅和学习。

Preface

Who This Book Is For

Clearly, this book is for programmers who want to create web applications (traditional

websites, RESTful APIs, or anything in between) using JavaScript, Node, and Express.

One of the exciting aspects of Node development is that it has attracted a whole new

audience of programmers. The accessibility and flexibility of JavaScript has attracted

self-taught programmers from all over the world. At no time in the history of computer

science has programming been so accessible. The number and quality of online resour‐

ces for learning to program (and getting help when you get stuck) is truly astonishing

and inspiring. So to those new (possibly self-taught) programmers, I welcome you.

Then, of course, there are the programmers like me, who have been around for a while.

Like many programmers of my era, I started off with assembler and BASIC, and went

through Pascal, C++, Perl, Java, PHP, Ruby, C, C#, and JavaScript. At university, I was

exposed to more niche languages such as ML, LISP, and PROLOG. Many of these lan‐

guages are near and dear to my heart, but in none of these languages do I see so much

promise as I do in JavaScript. So I am also writing this book for programmers like myself,

who have a lot of experience, and perhaps a more philosophical outlook on specific

technologies.

No experience with Node is necessary, but you should have some experience with Java‐

Script. If you’re new to programming, I recommend Codecademy. If you’re an experi‐

enced programmer, I recommend Douglas Crockford’s JavaScript: The Good Parts

(O’Reilly). The examples in this book can be used with any system that Node works on

(which covers Windows, OS X, and Linux). The examples are geared toward command-

line (terminal) users, so you should have some familiarity with your system’s terminal.

Most important, this book is for programmers who are excited. Excited about the future

of the Internet, and want to be part of it. Excited about learning new things, new tech‐

niques, and new ways of looking at web development. If, dear reader, you are not excited,

I hope you will be by the time you reach the end of this book….

How This Book Is Organized

Chapters 1 and 2 will introduce you to Node and Express and some of the tools you’ll

be using throughout the book. In Chapters 3 and 4, you start using Express and build

the skeleton of a sample website that will be used as a running example throughout the

rest of the book.

Chapter 5 discusses testing and QA, and Chapter 6 covers some of Node’s more im‐

portant constructs and how they are extended and used by Express. Chapter 7 covers

templating (using Handlebars), which lays the foundation of building useful websites

with Express. Chapters 8 and 9 cover cookies, sessions, and form handlers, rounding

out the things you need to know to build basic functional websites with Express.

Chapter 10 delves into “middleware,” a concept central to Connect (one of Express’s

major components). Chapter 11 explains how to use middleware to send email from

the server and discusses security and layout issues inherent to email.

Chapter 12 offers a preview into production concerns. Even though, at this stage in the

book, you don’t have all the information you need to build a production-ready website,

thinking about production now can save you from major headaches in the future.

Chapter 13 is about persistence, with a focus on MongoDB (one of the leading document

databases).

Chapter 14 gets into the details of routing with Express (how URLs are mapped to

content), and Chapter 15 takes a diversion into writing APIs with Express. Chapter 16

covers the details of serving static content, with a focus on maximizing performance.

Chapter 17 reviews the popular model-view-controller (MVC) paradigm, and how it

fits into Express.

Chapter 18 discusses security: how to build authentication and authorization into your

app (with a focus on using a third-party authentication provider), as well as how to run

your site over HTTPS.

Chapter 19 explains how to integrate with third-party services. Examples used are Twit‐

ter, Google Maps, and Weather Underground.

Chapters 20 and 21 get your ready for the big day: your site launch. They cover debug‐

ging, so you can root out any defects before launch, and the process of going live.

Chapter 22 talks about the next important (and oft-neglected) phase: maintenance.

The book concludes with Chapter 23, which points you to additional resources, should

you want to further your education about Node and Express, and where you can go to

get help.

xvi | Preface

This element signifies a general note.

This element indicates a warning or caution.

Using Code Examples

Supplemental material (code examples, exercises, etc.) is available for download at

https://github.com/EthanRBrown/web-development-with-node-and-express.

This book is here to help you get your job done. In general, if example code is offered

with this book, you may use it in your programs and documentation. You do not need

to contact us for permission unless you’re reproducing a significant portion of the code.

For example, writing a program that uses several chunks of code from this book does

not require permission. Selling or distributing a CD-ROM of examples from O’Reilly

books does require permission. Answering a question by citing this book and quoting

example code does not require permission. Incorporating a significant amount of ex‐

ample code from this book into your product’s documentation does require permission.

We appreciate, but do not require, attribution. An attribution usually includes the title,

author, publisher, and ISBN. For example: “Web Development with Node and Express

If you feel your use of code examples falls outside fair use or the permission given above,

feel free to contact us at permissions@oreilly.com.

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xviii | Preface

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