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Home > Web Development > Web Services > RESTful Web API Design with Node.js
RESTful Web API Design with Node.js
RESTful Web API Design with Node.js

RESTful Web API Design with Node.js: A step-by-step guide in the RESTful world of Node.js. , Second Edition

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RESTful Web API Design with Node.js

Chapter 2.  Getting Started with Node.js

In this chapter, you will gain your first real experience with Node.js. We will start by installing Node.js, along with some of the modules we will use throughout this book. Then, we will set up a development environment. I have chosen the Nodeclipse plugin for the well-known Eclipse IDE, which comes preinstalled within the Enide Developer Studio.

Next, we will create a workspace and start developing our first Node.js application. It will be a simple server processing incoming HTTP requests. Then we will go one step further, demonstrating how to modularize and test our JavaScript code. Finally, we will take a look at some cloud environment offerings that we can use to deploy our applications.

To sum up, in this chapter, we will cover the following topics:

  • Installing Node.js
  • Installing the Express framework and other modules
  • Setting up a development environment
  • Handling HTTP requests
  • Modularizing code
  • Testing Node.js
  • Deploying an application...

Installing Node.js

The current version of the latest Node.js release is five. This is a stable short-term support release, which should serve as a bridge between the latest Long Term Support and the following one.

Let's start our journey through Node.js with a Node.js installation. Installers are available both for Windows and Mac operating systems at http://www.nodejs.org/download/. Linux users can either build Node.js from the available Linux binaries or can make use of their package manager, as Node.js is available with most of the popular package repositories for different Linux distributions. Currently, there are two versions available in the repositories — €”the LTS Version 4.x and the stable 5.x. By default, the package manager points to the LTS release, so we should explicitly tell the manager to install the 5.x Version via the following command:

curl -sL https://deb.nodesource.com/setup_5.x | sudo -E bash -
apt-get install nodejs

For now, let's install...

Node Package Manager

Node.js eases support to third-party open source developed modules by providing the Node Package Manager (we've already mentioned it, that is, NPM). It allows you, as a developer, to easily install, manage, and even provide your own modules for a rapidly grown and well-maintained open source repository. It is available at http://www.npmjs.org/ and is accessible via its command-line interface.

If you didn't use the installer, then you will need to install NPM separately. For example, Ubuntu users can make use of their package installer as follows:

apt-get npm install

Once NPM is installed, you may want to set it permanently in your user profile's PATH environment variable by editing the ~/.profile file to export the path to NPM as follows:

export PATH=$PATH:/path/to/npm

After a successful NPM installation, use NPM's  ls option to display the already installed Node.js modules:

Node Package Manager

Installing the Express framework and other modules

Now that we have NPM...

Deploying an application

Node.js has an event-driven, non-blocking I/O model, which makes it perfect for real-time applications that scale well in distributed environments, such as public or private cloud platforms. Each cloud platform offers tools that allow seamless deployment, distribution, and scaling of its hosted applications. In this section, we will look at two publicly available Node.js application cloud providers — €”Nodejitsu and Microsoft Azure.

But first, let's spend some time on the clustering support, as it is fundamental for understanding why Node.js fits so well in the cloud environment. Node.js comes with clustering support built in its core. Using the cluster module in your applications allows them to start as many workers as necessary to handle the load they will face. Generally, it is recommended to match the number of workers to the number of threads or logical cores your environment has.

Note

The heart of your application is the master process...

Microsoft Azure

Microsoft's cloud platform as a service, Azure, also offers hosting of Node.js applications. They have chosen a slightly different approach, and instead of providing a command-line interface to interact with their repositories, they make use of their Git integration; that is, you interact with Azure as you would interact with any other Git repository. If you are not familiar with Git, I strongly recommend that you learn more about this distributed source code version control system.

Tip

If you've chosen Azure as your platform, you will find this link very useful: http://azure.microsoft.com/en-us/develop/nodejs/

Nodejitsu

Let's take a closer look at some Node.js's Platform as a Service (PaaS) offerings. The first PaaS we will look at is Nodejitsu, available at https://www.nodejitsu.com.

This allows seamless deployment of Node.js applications on the cloud, with many useful features for development, management, deployment, and monitoring of Node.js applications...

Self-test questions

To get additional confidence about your newly gained knowledge, go through the next set of statements and state whether they are true or false:

  • Node modules can export more than one function to outer components.
  • Node modules are extendable.
  • Modules always need to explicitly declare their dependencies to other modules.
  • When using mocking in a test environment, the mocked method is called on the mocked object.
  • Debugging Node.js code is not as straightforward as other pieces of non-JavaScript code.

Installing Node.js

The current version of the latest Node.js release is five. This is a stable short-term support release, which should serve as a bridge between the latest Long Term Support and the following one.

Let's start our journey through Node.js with a Node.js installation. Installers are available both for Windows and Mac operating systems at http://www.nodejs.org/download/. Linux users can either build Node.js from the available Linux binaries or can make use of their package manager, as Node.js is available with most of the popular package repositories for different Linux distributions. Currently, there are two versions available in the repositories — €”the LTS Version 4.x and the stable 5.x. By default, the package manager points to the LTS release, so we should explicitly tell the manager to install the 5.x Version via the following command:

curl -sL https://deb.nodesource.com/setup_5.x | sudo -E bash -
apt-get install nodejs

For now, let's install Node.js from its installer...

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Key benefits

  • • Create a fully featured RESTful API solution from scratch.
  • • Learn how to leverage Node.JS, Express, MongoDB and NoSQL datastores to give an extra edge to your REST API design.
  • • Use this practical guide to integrate MongoDB in your Node.js application.

Description

In this era of cloud computing, every data provisioning solution is built in a scalable and fail-safe way. Thus, when building RESTful services, the right choice for the underlying platform is vital. Node.js, with its asynchronous, event-driven architecture, is exactly the right choice to build RESTful APIs. This book will help you enrich your development skills to create scalable, server-side, RESTful applications based on the Node.js platform. Starting with the fundamentals of REST, you will understand why RESTful web services are better data provisioning solution than other technologies. You will start setting up a development environment by installing Node.js, Express.js, and other modules. Next, you will write a simple HTTP request handler and create and test Node.js modules using automated tests and mock objects. You will then have to choose the most appropriate data storage type, having options between a key/value or document data store, and also you will implement automated tests for it. This module will evolve chapter by chapter until it turns into a full-fledged and secure Restful service.

Who is this book for?

The ideal target audience for this book is web developers who have some experience with RESTful services. Familiarity with basic JavaScript programming techniques is required. No prior experience with Node.JS or Express.js is required.

What you will learn

  • • Install, develop, and test your own Node.js user modules
  • • Comprehend the differences between an HTTP and a RESTful application
  • • Optimize RESTful service URI routing with best practices
  • • Eliminate third-party dependencies in your tests with mocking
  • • Learn about NoSQL data stores and integrate MongoDB in your Node.js application with Mongoose
  • • Secure your services with NoSQL database integration within Node.js applications
  • • Enrich your development skills to create scalable, server-side, RESTful applications
  • based on the Node.js platform

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : May 26, 2016
Length: 148 pages
Edition : 2nd
Language : English
ISBN-13 : 9781786463203
Category :
Web Development
Languages :
JavaScript
Concepts :
Web Services
Tools :
Node.js

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Product feature icon Instant access to your Digital eBook purchase
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want

Product Details

Publication date : May 26, 2016
Length: 148 pages
Edition : 2nd
Language : English
ISBN-13 : 9781786463203
Category :
Web Development
Languages :
JavaScript
Concepts :
Web Services
Tools :
Node.js

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Table of Contents

6 Chapters
1. REST – What You Did Not Know Chevron down icon Chevron up icon
1. REST – What You Did Not Know
REST fundamentals
The REST goals
Working with WADL
Summary
2. Getting Started with Node.js Chevron down icon Chevron up icon
2. Getting Started with Node.js
Installing Node.js
Node Package Manager
Deploying an application
Microsoft Azure
Self-test questions
Summary
3. Building a Typical Web API Chevron down icon Chevron up icon
3. Building a Typical Web API
Specifying the API
Implementing routes
Querying the API
Content negotiation
Cross-origin resource sharing
API versioning
Self-test questions
Summary
4. Using NoSQL Databases Chevron down icon Chevron up icon
4. Using NoSQL Databases
Key/value store - LevelDB
Document store - MongoDB
Database modeling with Mongoose
Testing a Mongoose model with Mocha
Creating a user-defined model around a Mongoose model
Wiring up a NoSQL database module to Express
Content delivery network
Self-test questions
Summary
5. Implementing a Fully-Fledged RESTful Service Chevron down icon Chevron up icon
5. Implementing a Fully-Fledged RESTful Service
Extensibility and versioning
Working with arbitrary data
Linking
Implementing paging and filtering
Caching
Supplying the Cache-Control header in Express applications
Discovering and exploring RESTful services
Self-test questions
Summary
6. Keeping the Bad Guys Out Chevron down icon Chevron up icon
6. Keeping the Bad Guys Out
Authentication
Authorization
Transport Layer Security
Self-test questions
Summary

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Hüseyin BABAL May 31, 2016
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book is good for anyone who want to learn the basics of REST API Fundamentals, and developing RESTful API by using Node.js and related technologies. You can easily understand the flow of developing scalable applications by using Node.js, store your data into NoSQL databases, stabilise your applications by using TDD by using this book. Happy coding!
Amazon Verified review Amazon
Steve T. Jun 14, 2016
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I recently obtained a copy of this book and I'm impressed by the style, level of detail and usefulness of the examples. The book covers on all key concepts of REST and will walk you through the entire development process including storing the data, security, writing tests and deployment!I highly recommend this book to anybody looking at developing RESTful APIs using Node.js!
Amazon Verified review Amazon
Amazon Customer Feb 15, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This is an awesome book for any developer who wants to develop software using great practices. This book explains things well and dives deep into why certain approaches are taken. Good read!
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DSJ Sep 15, 2016
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Great Book!
Amazon Verified review Amazon
Gregori Jun 13, 2016
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I did like the first edition of this book as it helped me quickly dive into the topic, however, it had few weak points. I am really glad those are polished in the second edition, and I really found the automated tests for the database layer really helpful! I recommend this to anyone who needs to go into the topic quickly
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About the author

Profile icon Bojinov
Bojinov
Valentin Bojinov studied computer science at the Technological School of Electronic Systems in Sofia, Bulgaria, a college within the Technical University of Sofia. He holds a B.Sc. in telecommunication and information engineering. Valentin is an expert in Java, SOAP, RESTful web services, and B2B integration. He specializes B2B Integration and Service Oriented Architecture and currently works as an Senior Integration Consultant in an UK consultancy company Estafet Limited.
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