book

Node.js Cookbook - Fifth Edition

Name: Node.js Cookbook - Fifth Edition
ISBN: 9781804619810

by Bethany Griggs, Manuel Spigolon

November 2024

Intermediate to advanced

456 pages

10h 14m

English

Packt Publishing

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Node.js Cookbook
Contributors
About the authors
About the reviewer
Preface
Who this book is forWhat this book coversTo get the most out of this bookDownload the example code filesConventions usedSectionsGetting readyHow to do it…How it works…There’s more…See alsoGet in touchShare Your ThoughtsDownload a free PDF copy of this book
Chapter 1: Introducing Node.js 22
Technical requirementsInstalling Node.js 22 with nvmGetting readyHow to do it…How it works…There’s more…Accessing the Node.js API documentationGetting readyHow to do it…How it works…There’s more…Adopting new JavaScript syntax in Node.js 22Getting readyHow to do it…How it works…Introducing the Node.js event loopGetting readyHow to do it…How it works…There’s more
Chapter 2: Interacting with the File System
Technical requirementsInteracting with the file systemGetting readyHow to do it…How it works…There’s more…See alsoWorking with filesGetting readyHow to do it…How it works…There’s more…See alsoFetching metadataGetting readyHow to do it…How it works…There’s more…See alsoWatching filesGetting readyHow to do it…How it works…There’s more…See also
Chapter 3: Working with Streams
Technical requirementsCreating readable and writable streamsGetting readyHow to do it…How it works…There’s more…See alsoInteracting with paused streamsGetting readyHow to do it…How it works…See alsoPiping streamsGetting readyHow to do it…How it works…There’s more…See alsoCreating transform streamsGetting readyHow to do it…How it works…There’s more…See alsoBuilding stream pipelinesGetting readyHow to do it…How it works…There’s more…See also
Chapter 4: Using Web Protocols
Technical requirementsMaking HTTP requestsGetting readyHow to do it…How it works…There’s more…See alsoCreating an HTTP serverGetting readyHow to do it…How it works…There’s more…See alsoReceiving HTTP POST requestsGetting readyHow to do it…How it works…There’s more…See alsoHandling file uploadsGetting readyHow to do it…How it works…There’s more…See alsoCreating a WebSocket serverGetting readyHow to do it…How it works…There’s more…See alsoCreating an SMTP serverGetting readyHow to do it…How it works…There’s more…See also
Chapter 5: Developing Node.js Modules
Technical requirementsConsuming Node.js modulesGetting readyHow to do it…How it works…There’s more…See alsoScaffolding a moduleGetting readyHow to do it…How it works…There’s more…See alsoWriting module codeGetting readyHow to do it…How it works…See alsoPublishing a moduleGetting readyHow to do it…How it works…There’s more…Using ECMAScript modulesGetting readyHow to do it…How it works…There’s more…See also
Chapter 6: Working with Fastify – The Web Framework
Technical requirementsCreating an API starter using FastifyGetting readyHow to do it…Splitting the code into small pluginsHow to do it…How it works…Adding routesHow to do it…How it works…There’s more...Implementing authentication with hooksGetting readyHow to do it…How it works…There’s more...Breaking the encapsulationGetting readyHow to do it…There’s more...Implementing business logic using hooksGetting readyHow to do it…Validating the input dataHow to do it…Enhancing application performance with serializationHow to do it…Configuring and testing a Fastify applicationGetting readyHow to do it…How it works…There’s more...

Chapter 7: Persisting to Databases
Technical requirementsConnecting and persisting to a MySQL databaseGetting readyHow to do it…How it works…There’s more…See alsoConnecting and persisting to a PostgreSQL databaseGetting readyHow to do it…How it works…There’s more…See alsoConnecting and persisting to MongoDBGetting readyHow to do it…How it works…See alsoPersisting data with RedisGetting readyHow to do it…How it works…There’s more…See alsoExploring GraphQLGetting readyHow to do it…How it works…See also
Chapter 8: Testing with Node.js
Technical requirementsTesting with node:testGetting readyHow to do it…How it works…There’s more…See alsoTesting with JestGetting readyHow to do it…How it works…There’s more…See alsoStubbing HTTP requestsGetting readyHow to do it…How it works…See alsoUsing PuppeteerGetting readyHow to do it…How it works…There’s more…See alsoConfiguring Continuous Integration testsGetting readyHow to do it…How it works…See also
Chapter 9: Dealing with Security
Technical requirementsDetecting dependency vulnerabilitiesGetting readyHow to do it…How it works…There’s more...See alsoAuthentication with FastifyGetting readyHow to do it…How it works…There’s more…See alsoHardening headers with HelmetGetting readyHow to do it…How it works…There’s more…See alsoAnticipating malicious inputGetting readyHow to do it…How it works…There’s more…See alsoPreventing JSON pollutionGetting readyHow to do it…How it works…See alsoGuarding against cross-site scriptingGetting readyHow to do it…How it works…There’s more…See alsoPreventing cross-site request forgeryGetting readyHow to do it…How it works…There’s more…See also
Chapter 10: Optimizing Performance
Technical requirementsBenchmarking HTTP requestsGetting readyHow to do it…How it works…There’s more…See alsoInterpreting flame graphsGetting readyHow to do it…How it works…See alsoDetecting memory leaksGetting readyHow to do it…How it works…There’s more…See alsoOptimizing synchronous functionsGetting readyHow to do it…How it works…See alsoOptimizing asynchronous functionsGetting readyHow to do it…How it works…See alsoWorking with worker threadsGetting readyHow to do it…How it works…
Chapter 11: Deploying Node.js Microservices
Technical requirementsGenerating a microservice with LoopBackGetting readyHow to do it…How it works…See alsoConsuming a microserviceGetting readyHow to do it…How it works…See alsoBuilding a Docker containerGetting readyHow to do it…How it works…There’s more…See alsoPublishing a Docker imageGetting readyHow to do it…How it works…There’s more…See alsoDeploying to KubernetesGetting readyHow to do it…How it works…There’s more…See also
Chapter 12: Debugging Node.js
Technical requirementsDiagnosing issues with Chrome DevToolsGetting readyHow to do it…How it works…There’s more…See alsoLogging with Node.jsGetting readyHow to do it…How it works…There’s more…See alsoEnabling debug logsGetting readyHow to do it…How it works…See alsoEnabling Node.js core debug logsGetting readyHow to do it…How it works…See alsoIncreasing stack trace sizeGetting readyHow to do it…How it works…There’s more…See alsoCreating diagnostic reportsGetting readyHow to do it…How it works…See also
Index
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Content preview from Node.js Cookbook - Fifth Edition

3 Working with Streams

Streams are one of the key features of Node.js. Most Node.js applications rely on the underlying Node.js streams implementation, be it for reading/writing files, handling HTTP requests, or other network communications. Streams provide a mechanism to read input and write output sequentially.

By reading chunks of data sequentially, we can work with very large files (or other data input) that would generally be too large to read into memory and process as a whole. Streams are fundamental to big data applications or media streaming services, where the data is too large to consume at once.

There are four main types of streams in Node.js:

Readable streams: Used for reading data, such as reading a file, or reading data from ...

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Node.js Cookbook - Fifth Edition

by Bethany Griggs, Manuel Spigolon

3

Working with Streams

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.