Node, express & sails

Covering
● What is Node
● What makes Node
● What is NPM
● Why all this?
...

Hands on!
● Node.js: Hello world (cli & web)
● Express.js: Hello world
● Sails.js: Hello world
● Build a Rest API
● Test the API
● Use the API

What is Node?
Node.js® is a platform built on
Chrome's JavaScript runtime for:
● easily building fast,
● scalable network applications.
Node.js uses an:
● event-driven,
● non-blocking I/O model
that makes it lightweight and efficient, perfect for
data-intensive real-time applications that run
across distributed devices.

What is Node?
Node.js uses an:
● event-driven,
It's all about non-blocking,
asynchronous architecture

What is Node?
Node.js uses an:
● event-driven,
It's all about non-blocking,
asynchronous architecture
This means any activity taking
a long time to finish, such as
file access, network requests,
and database operations, are
requested and put aside until the
results are ready and returned

What is Node?
Node.js uses an:
● event-driven,
Easy setup & code

What is Node?
Node.js uses an:
● event-driven,
It is the server!

What is Node?
Node.js uses an:
● event-driven,
It is the server!
Just 1

What is Node?
Node.js uses an:
● event-driven,
It is the server!
Just 1
But if your app crashs it
will bring down the server

What is Node?
Node.js uses an:
● event-driven,
No polling..
just callbacks
= FAST but out of order

What is Node?
Node.js uses an:
● event-driven,
No headaches with
multithreaded async I/O

What is
Node page manager
NPM is a package manager for JavaScript, and is
installed by default for Node.js.

What is
Node page manager
NPM runs through the command line and manages
dependencies for an application.

What is
Node page manager
NPM runs through the command line and manages
dependencies for an application.
It also allows users to install Node.js applications
that are available on the npm registry.

And because of JavaScript
Mongo DB

Installing
Mac: brew install node⎆
Linux: apt-get install nodejs⎆
Linux: apt-get install npm⎆
⎆ node -v
⎆ npm -v
Server App
⎆ Node
⎆ Console.log(“Hi”)

✎
var http = require("http");
var url = require("url");
var start = function() {
var onRequest = function(request, response) {
var pathname = url.parse(request.url).pathname;
console.log("Request for " + pathname);
response.writeHead(200, {
"Content-Type": "text/plain"
});
response.write("HackerShip");
return response.end();
};
http.createServer(onRequest).listen(8888);
return console.log("Server has started.");
};
start();
⎙ balbal.js
⎆ node balbal.js
Node is the Server..
Not a framework!

✎
var http = require("http");
var url = require("url");
var start = function() {
var onRequest = function(request, response) {
var pathname = url.parse(request.url).pathname;
console.log("Request for " + pathname);
response.writeHead(200, {
"Content-Type": "text/plain"
});
response.write("HackerShip");
return response.end();
};
http.createServer(onRequest).listen(8888);
return console.log("Server has started.");
};
start();
⎙ balbal.js
⎆ node balbal.js

Installing & Run
⎆ npm install -g express
⎆ express HS
⎆ cd HS
⎆ npm install
⎆ npm start
☺ http://localhost:3000/
HSroutesindex.js ✍

Installing & Run
⎆ npm install -g sails
⎆ sails new HS2
⎆ cd HS2
⎆ sails lift
☺ http://localhost:1337/

Auto-generate REST APIs
⎆ sails generate api messages
api/models/ … api/controllers/
www.getpostman.com
⎆ sails lift

Using REST APIs [HTML]
<form action="http://localhost:1337/messages" method="post">
Text: <input type="text" name="text"><br>
<input type="submit" value="Submit">
</form>
<script src="http://code.jquery.com/jquery-2.1.3.js"></script>
<script>
// ...
</script>

Using REST APIs [JS]
var myJSONData = '{"text":”some text”}';
$.ajax({type: 'POST',
url: 'http://localhost:1337/messages',
data: myJSONData,
success: function(data) {
alert("POSTED SUCCESSFULLY TO THE SERVER");
}, // Success Function
error: function(err){
alert(err.message);
}
}); // Ajax Call

Node, express & sails

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