NodeJS Training

Prerequisites

Introduction
The Node.js framework
- Explain what Node.js is
- Describe how Node.js works
- Identify when to use Node.js
- Create and run a Node.js script from the command line
Event Loop
What is the Event Loop?
- Event Loop Explained
- Phases Overview
- Why use process.nextTick()?
Single threaded Architecture
- V8 JavaScript Engine
- C library - libuv
- Process & Thread
- Thread pool
- Understand Node JS Single Thread Event Loop Workflow

Global Objects (http://nodejs.org/api/globals.html)
- __filename
- __dirname
- module
- exports
- process
- Buffer
Console (http://nodejs.org/api/console.html)
- log
- info
- error
- warn
- dir
- time
- timeEnd
- trace
- assert
Timers (http://nodejs.org/api/timers.html)
- setTimeout(callback, delay, [arg], [...])
- clearTimeout(t)
- setInterval(callback, delay, [arg], [...])
- clearInterval(t)
- setImmediate(callback, [arg], [...])
- clearImmediate(immediateObject)
- unref()
- ref()
Modules (http://nodejs.org/api/modules.html)
Debugging(https://nodejs.org/en/docs/guides/debugging-getting-started)
- --inspect
- Security Implications
- node-inspector(https://github.com/node-inspector/node-inspector)

HTTP protocol (http://nodejs.org/api/http.html)
- To use the HTTP server and client one must require('http').
HTTP server & HTTPS Server
URL (http://nodejs.org/api/url.htm)
- This module has utilities for URL resolution and parsing. Call require('url') to use it.
Query String (http://nodejs.org/api/querystring.html)
- This module provides utilities for dealing with query strings. Call require('querystring') to use it

Basic (http://nodejs.org/api/fs.html)
- To use this module do require('fs').
- All the methods have asynchronous and synchronous forms.
Synchronous vs Asynchronous IO
File Read and Write
Util (http://nodejs.org/api/util.html)
Path
- Use require('path') to use this module.
- This module contains utilities for handling and transforming file paths.
- Almost all these methods perform only string transformations.

Buffers for binary Data (http://nodejs.org/api/buffer.html)
- Buffer is used to dealing with binary data
- Buffer is similar to an array of integers but corresponds to a raw memory allocation outside the V8 heap
Event Emitter(http://nodejs.org/api/events.html)
- addListener
- on
- once
- removeListener
- removeAllListeners
- setMaxListeners
- listeners
- emit
Stream (http://nodejs.org/api/stream.html)
- Flowing vs non-flowing streams
- Streams are readable, writable, or both.
- readable streams
- http responses on the client
  - http requests on the server
  - fs read streams
  - zlib streams (https://nodejs.org/api/zlib.html)
  - crypto streams (https://nodejs.org/api/crypto.html)
  - tcp sockets
  - child process stdout and stderr
  - process.stdin
- writable streams
  - http requests on the client
  - http responses on the server
  - fs write streams
  - zlib streams
  - crypto streams
  - tcp sockets
  - child process stdin
  - process.stdout
  - process.stderr
- Duplex streams
  - tcp sockets
  - zlib streams
  - crypto streams
- Transform streams
  - zlib streams
  - crypto streams
File System and Security (Example - Build one system)
- API to upload file
- Wrapper to upload file
Web-hooks

Process(http://nodejs.org/api/process.html)
Child Process (http://nodejs.org/api/child_process.html)
- Node provides a tri-directional popen facility through the child_process module.
- It is possible to stream data through a child's stdin, stdout, and stderr in a fully non-blocking way.
Cluster API for multi-core servers
Multi-Processing
Provides a few basic operating-system related utility functions
Use require('os') to access this module. (http://nodejs.org/api/os.html)