Node JS Notes For Professionals PDF

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Node.js Notes for Professionals

Node.js

Notes for Professionals

300+ pages

of professional hints and tr

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Contents

About ............................................................................................................................................................................... Chapter 1: Getting started with Node.js .........................................................................................................

Section 1.1: Hello World HTTP server ........................................................................................................................ Section 1.2: Hello World command line ...................................................................................................................

Section 1.3: Hello World with Express ....................................................................................................................... Section 1.4: Installing and Running Node.js ............................................................................................................. Section 1.5: Debugging Your NodeJS Application ..................................................................................................

Section 1.6: Hello World basic routing ......................................................................................................................

Section 1.7: Hello World in the REPL ......................................................................................................................... Section 1.8: Deploying your application online ........................................................................................................ Section 1.9: Core modules .........................................................................................................................................

Section 1.10: TLS Socket: server and client ...............................................................................................................

Section 1.11: How to get a basic HTTPS web server up and running! ....................................................................

Chapter 2: npm ..........................................................................................................................................................

Section 2.1: Installing packages ................................................................................................................................ Section 2.2: Uninstalling packages ..........................................................................................................................

Section 2.3: Setting up a package configuration ....................................................................................................

Section 2.4: Running scripts ...................................................................................................................................... Section 2.5: Basic semantic versioning .................................................................................................................... Section 2.6: Publishing a package ...........................................................................................................................

Section 2.7: Removing extraneous packages ......................................................................................................... Section 2.8: Listing currently installed packages ....................................................................................................

Section 2.9: Updating npm and packages ..............................................................................................................

Section 2.10: Scopes and repositories ......................................................................................................................

Section 2.11: Linking projects for faster debugging and development ................................................................. Section 2.12: Locking modules to specific versions ................................................................................................

Section 2.13: Setting up for globally installed packages ........................................................................................

Chapter 3: Web Apps With Express ..................................................................................................................

Section 3.1: Getting Started .......................................................................................................................................

Section 3.2: Basic routing .......................................................................................................................................... Section 3.3: Modular express application ................................................................................................................ Section 3.4: Using a Template Engine .....................................................................................................................

Section 3.5: JSON API with ExpressJS ...................................................................................................................... Section 3.6: Serving static files ................................................................................................................................. Section 3.7: Adding Middleware ............................................................................................................................... Section 3.8: Error Handling .......................................................................................................................................

Section 3.9: Getting info from the request ............................................................................................................... Section 3.10: Error handling in Express .....................................................................................................................

Section 3.11: Hook: How to execute code before any req and after any res ........................................................

Section 3.12: Setting cookies with cookie-parser ....................................................................................................

Section 3.13: Custom middleware in Express ........................................................................................................... Section 3.14: Named routes in Django-style ............................................................................................................

Section 3.15: Hello World ...........................................................................................................................................

Section 3.16: Using middleware and the next callback ...........................................................................................

Section 3.17: Error handling ....................................................................................................................................... Section 3.18: Handling POST Requests .................................................................................................................... Chapter 4: Filesystem I/O ....................................................................................................................................

Section 4.1: Asynchronously Read from Files .......................................................................................................... Section 4.2: Listing Directory Contents with readdir or readdirSync ....................................................................

Section 4.3: Copying files by piping streams ...........................................................................................................

Section 4.4: Reading from a file synchronously .....................................................................................................

Section 4.5: Check Permissions of a File or Directory ............................................................................................ Section 4.6: Checking if a file or a directory exists .................................................................................................

Section 4.7: Determining the line count of a text file ..............................................................................................

Section 4.8: Reading a file line by line ......................................................................................................................

Section 4.9: Avoiding race conditions when creating or using an existing directory .......................................... Section 4.10: Cloning a file using streams ................................................................................................................ Section 4.11: Writing to a file using writeFile or writeFileSync ................................................................................

Section 4.12: Changing contents of a text file .........................................................................................................

Section 4.13: Deleting a file using unlink or unlinkSync .......................................................................................... Section 4.14: Reading a file into a Buer using streams ........................................................................................

Chapter 5: Exporting and Consuming Modules ..........................................................................................

Section 5.1: Creating a hello-world.js module ..........................................................................................................

Section 5.2: Loading and using a module ............................................................................................................... Section 5.3: Folder as a module ...............................................................................................................................

Section 5.4: Every module injected only once .........................................................................................................

Section 5.5: Module loading from node_modules ..................................................................................................

Section 5.6: Building your own modules .................................................................................................................. Section 5.7: Invalidating the module cache .............................................................................................................

Chapter 6: Exporting and Importing Module in node.js .........................................................................

Section 6.1: Exporting with ES6 syntax .....................................................................................................................

Section 6.2: Using a simple module in node.js ........................................................................................................

Chapter 7: How modules are loaded ...............................................................................................................

Section 7.1: Global Mode ........................................................................................................................................... Section 7.2: Loading modules ...................................................................................................................................

Chapter 8: Cluster Module ....................................................................................................................................

Section 8.1: Hello World .............................................................................................................................................

Section 8.2: Cluster Example .....................................................................................................................................

Chapter 9: Readline .................................................................................................................................................

Section 9.1: Line-by-line file reading .........................................................................................................................

Section 9.2: Prompting user input via CLI ................................................................................................................

Chapter 10: package.json ......................................................................................................................................

Section 10.1: Exploring package.json ........................................................................................................................

Section 10.2: Scripts ................................................................................................................................................... Section 10.3: Basic project definition ........................................................................................................................

Section 10.4: Dependencies .......................................................................................................................................

Section 10.5: Extended project definition .................................................................................................................

Chapter 11: Event Emitters ....................................................................................................................................

Section 11.1: Basics ..................................................................................................................................................... Section 11.2: Get the names of the events that are subscribed to .........................................................................

Section 11.3: HTTP Analytics through an Event Emitter ..........................................................................................

Section 11.4: Get the number of listeners registered to listen for a specific event ...............................................

Chapter 12: Autoreload on changes .................................................................................................................

Section 12.1: Autoreload on source code changes using nodemon ...................................................................... Section 12.2: Browsersync ......................................................................................................................................... Chapter 13: Environment .......................................................................................................................................

Section 13.1: Accessing environment variables ....................................................................................................... Section 13.2: process.argv command line arguments ............................................................................................

Section 13.3: Loading environment properties from a "property file" .................................................................. Section 13.4: Using dierent Properties/Configuration for dierent environments like dev, qa, staging etc ..............................................................................................................................................................................

Chapter 14: Callback to Promise .......................................................................................................................

Section 14.1: Promisifying a callback ........................................................................................................................

Section 14.2: Manually promisifying a callback ...................................................................................................... Section 14.3: setTimeout promisified ........................................................................................................................

Chapter 15: Executing files or commands with Child Processes ........................................................

Section 15.1: Spawning a new process to execute a command .............................................................................

Section 15.2: Spawning a shell to execute a command ..........................................................................................

Section 15.3: Spawning a process to run an executable ........................................................................................

Chapter 16: Exception handling ..........................................................................................................................

Section 16.1: Handling Exception In Node.Js ............................................................................................................ Section 16.2: Unhanded Exception Management ...................................................................................................

Section 16.3: Errors and Promises .............................................................................................................................

Chapter 17: Keep a node application constantly running ....................................................................

Section 17.1: Use PM2 as a process manager .......................................................................................................... Section 17.2: Running and stopping a Forever daemon ........................................................................................

Section 17.3: Continuous running with nohup ..........................................................................................................

Chapter 18: Uninstalling Node.js ........................................................................................................................

Section 18.1: Completely uninstall Node.js on Mac OSX .......................................................................................... Section 18.2: Uninstall Node.js on Windows .............................................................................................................

Chapter 19: nvm - Node Version Manager .................................................................................................... Section 19.1: Install NVM ............................................................................................................................................

Section 19.2: Check NVM version ..............................................................................................................................

Section 19.3: Installing an specific Node version ..................................................................................................... Section 19.4: Using an already installed node version ......................................................