Getting Started with Node.JS on Alibaba Cloud

Prominent Node.JS Features

Node Is Asynchronous and Event-Driven

Node Is Very Fast

Node Is Scalable

No Buffering

Installing Node.JS

Read-Eval-Print Loop

How to Launch Node.js Scripts

$ node -e "console.log(new Date());"

Process Information in Node.js

ps aux | grep 'node'
node -e "console.log("

How to Access Global Scope in Node.js

How to Export and Import Modules = object;, e.g., 
var messages = {
find: function(req, res, next) {
add: function(req, res, next) {
format: 'title | date | author'
exports.messages = messages;
var messages = require('./routes/messages.js');
module.exports = function(app) {
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
return app;
var app = express();
var config = require('./config/index.js');
app = config(app);
var = express(); require('./config/index.js')(app);.
var keys = require('./keys.js'),
messages = require('./routes/messages.js');

Buffer in Node.js

__dirname versus process.cwd

Other Useful Utilities

  1. URL
  2. Crypto
  3. Path
  4. String Decoder

Handling File Systems in Node.js

var fs = require('fs');
var path = require('path');
fs.readFile(path.join(__dirname, '/data/customers.csv'), {encoding: 'utf-8'}, function (err, data) {
if (err) throw err;
var fs = require('fs');
fs.writeFile('message.txt', 'Hello World!', function (err) {
if (err) throw err;
console.log('Writing is done.');

How to Stream Data in Node.js

var fs = require('fs');

Using NPN to Install Node.js modules

  1. The package.json file
  2. The node_modules folder

Hello World

var HTTP = require('HTTP');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(1332, '');
console.log('Server running at');]

Catching Bugs in Node.js

Dealing with Callbacks in Node.js

fs.readdir(source, function(err, files) {
if (err) {
console.log('Error finding files: ' + err)
} else {
files.forEach(function(filename, fileIndex) {
gm(source + filename).size(function(err, values) {
if (err) {
console.log('Error identifying file size: ' + err)
} else {
console.log(filename + ' : ' + values)
aspect = (values.width / values.height)
widths.forEach(function(width, widthIndex) {
height = Math.round(width / aspect)
console.log('resizing ' + filename + 'to ' + height + 'x' + height)
this.resize(width, height).write(destination + 'w' + width + '_' + filename, function(err) {
if (err) console.log('Error writing file: ' + err)


  1. I/O bound apps
  2. Apps for data streaming
  3. Data Intensive Real-time Applications (DIRT)
  4. JSON APIs based apps
  5. Single page apps




Follow me to keep abreast with the latest technology news, industry insights, and developer trends. Alibaba Cloud website:

Love podcasts or audiobooks? Learn on the go with our new app.

Recommended from Medium

React : The Most Popular JavaScript Web Framework

State Management in React without Redux / Mobx.

Deploying Node.js Apps for Production on Alibaba Cloud

Here is my learning when publishing a npm package

Fitness-Tracker My First End-To-End Front-End Project

How JavaScript works !

MOST HYPED Upcoming NFT projects that are releasing soon!

#8 Cool Features in ES11(ES 2020) you should know about

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
Alibaba Cloud

Alibaba Cloud

Follow me to keep abreast with the latest technology news, industry insights, and developer trends. Alibaba Cloud website:

More from Medium

Containerized Automation

How to integrate AWX with WSO2 API Manager?

Use Serverless to deploy Sample Google Cloud Functions

How To Install Redis On Centos 8