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<!doctype html>
<html lang="eu">
<head>
<meta charset="utf-8">
<title>Curso nodeJS</title>
<link type="text/css" rel="stylesheet" href="resources/css/kinout-1.0.css">
<link type="text/css" rel="stylesheet" href="resources/css/theme.kinout.css">
<link type="text/css" rel="stylesheet" href="resources/css/rainbow/blackboard.css">
</head>
<body>
<div class="kinout">
<section>
<article>
<h1>curso<mark>nodeJS</mark></h1>
</article>
</section>
<!-- #/2 nodejs-ri buruz -->
<section>
<header class="box">
<h2>sobre nodejs</h2>
</header>
<article data-size="middle">
<blockquote>
Node.js es una plataforma basada en el motor de javascript de Chrome, fácil para crear aplicaciones de red escalables.
Usa el modelo Entrada/salida non-blocking (no se bloquea) para crear aplicaciones livianas y eficaces.
Recomendado para compartir datos en tiempo real.
</blockquote>
<cite>http://nodejs.org</cite>
</article>
<article>
<header class="box white"><h4>Sobre el autor</h4></header>
<p><img src="http://i.imgur.com/Yvct6.png" alt="Ryan Dahl" title="Ryan Dahl" /></p>
<p>Ryan Dahl:</p>
<p>
Viendo que a javascript le faltaba una API de "push/pull" emepezo a crear nodejs.
</p>
</article>
<article>
<header class="box white"><h4>Ryan Dahl esandako zita pare bat</h4></header>
<p>
<blockquote>
A veces hay que dejar de lado cosas buenas para lograr cosas geniales.
</blockquote>
</p>
<p>
<blockquote>
La mayoría de veces la mejor solución lo tenemos delante de nuestras narices.
</blockquote>
</p>
<cite>Ryan Dahl</cite>
</article>
</section>
<!-- #/3 Zelan instalatu -->
<section>
<header class="box"><h2>Instalación</h2></header>
<article>
<p>
<img src="http://upload.wikimedia.org/wikipedia/en/a/a7/Nodejs_logo_light.png" />
</p>
<p>nodejs iturburutik konpilatuta edo sistemetarako prestatutako paketeekaz instalatu lei.</p>
<p>nodejs se puede instalar partiendo de las fuentes o mediante instaladores especificos para cada plataforma.</p>
<p><a href="http://www.nodejs.org">http://www.nodejs.org</a></p>
</article>
<article>
<header class="box white"><h4>gnu/linux</h4></header>
<p>
debian:
</p>
<pre class="margin-top" contenteditable="true">
aptitude install nodejs
</pre>
archlinux:
<pre class="margin-top" contenteditable="true">
pacman -S nodejs
</pre>
</article>
<article>
<header class="box white"><h4>Windows eta OSX</h4></header>
<p>Jarraitu web honetako instrukzioak:
<p>Seguid las instrucciones de la siguiente web:
<a href="http://www.nodejs.org/download/">http://www.nodejs.org/download/</a>
</p>
</article>
</section>
<!-- #/4 Kontsolan lanean -->
<section>
<header class="box"><h2>Trabajando con la consola</h2></header>
<article>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
node
>
1 + 2
function foo() { return 1 + 2}
foo()
</code>
</pre>
</article>
<header class="box white"><h4>Variables globales</h4></header>
<article>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
console.log(this);
process
process.pid
process.env
</code>
</pre>
</article>
</section>
<section>
<header class="box"><h2>Hello World</h2></header>
<article>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
setTimeout(function()
{
console.log('world');
}, 2000);
console.log('hello ');
</code>
</pre>
</article>
<article>
<header class="box white"><h4>Hello World 2</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
setInterval(function()
{
console.log('world');
}, 2000);
console.log('hello ');
</code>
</pre>
</article>
</section>
<section>
<header class="box"><h2>Servidor web</h2></header>
<article>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var http = require('http');
var server = http.createServer(function(req, res)
{
res.writeHead('200',
{
'content-type': 'text/plain'
}
);
res.end("hello world\n");
});
server.listen(8000);
</code>
</pre>
</article>
<article>
<header class="box white"><h4>Cabeceras</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
curl -i http://localhost:8000
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
HTTP/1.1 200 OK
content-type: text/plain
Connection: keep-alive
Transfer-Encoding: chunked
hello world
</code>
</pre>
</article>
<article>
<header class="box white"><h4>Significado de las cabeceras</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
Connection: keep-alive:
Conexiones persistentes
Transfer-Encoding: chunked:
Respuesta en partes
</code>
</pre>
</article>
<article>
<header class="box white"><h4>Atrasando la respuesta</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var http = require('http');
var server = http.createServer(function(req, res)
{
res.writeHead('200',
{
'content-type': 'text/plain'
}
);
res.write("hello\n");
setTimeout(function()
{
res.end("world\n")
}, 1500);
});
server.listen(8000);
</code>
</pre>
</article>
<article>
<header class="box white"><h4>Test de estres con "Apache benchmark"</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
ab -n 100 -c 100 http://127.0.0.1:8000/
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
Concurrency Level: 100
Time taken for tests: 1.523 seconds
Complete requests: 100
Failed requests: 0
Write errors: 0
Total transferred: 7600 bytes
HTML transferred: 1200 bytes
Requests per second: 65.66 [#/sec] (mean)
Time per request: 1523.004 [ms] (mean)
Time per request: 15.230 [ms] (mean, across all concurrent requests)
Transfer rate: 4.87 [Kbytes/sec] received
</code>
</pre>
</article>
</section>
<section>
<header class="box"><h2>TCP server</h2></header>
<article>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var net = require('net');
var server = net.createServer(function(socket)
{
socket.write("Hello\n");
socket.end("world\n");
});
server.listen(8000);
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
nc localhost 8000
telnet localhost 8000
</code>
</pre>
</article>
<article>
<header class="box white"><h4>chat simple</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var net = require('net');
var sockets = [];
var server = net.createServer(function(socket)
{
sockets.push(socket);
socket.on('data', function(data)
{
for(var i in sockets)
{
if(socket!=sockets[i])
sockets[i].write(data);
}
});
});
server.listen(8000);
</code>
</pre>
</article>
<article>
<header class="box white"><h4>quitar usuarios desconectados</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var net = require('net');
var sockets = [];
var server = net.createServer(function(socket)
{
sockets.push(socket);
socket.on('data', function(data)
{
for(var i in sockets)
{
if(socket!=sockets[i])
sockets[i].write(data);
}
});
socket.on('end', function()
{
// remove socket from array
var index = sockets.indexOf(socket);
if(index!='-1')
sockets.splice(index, 1);
});
});
server.listen(8000);
</code>
</pre>
</article>
</section>
<section>
<header class="box"><h2>Debug</h2></header>
<article>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
function foo()
{
debugger;
return 1 + 2;
}
foo();
</code>
</pre>
</article>
<article>
<header class="box white"><h4>Debugear por consola</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
node debug node-debug.js
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
< debugger listening on port 5858
connecting... ok
break in debug-example.js:7
5 }
6
7 foo();
8
9 });
debug>
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
backtrace
next
</code>
</pre>
</article>
</section>
<section>
<header class="box"><h2>ejemplo non-blocking</h2></header>
<article>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
setInterval(function()
{
console.log('hello world');
}, 5000);
var http = require('http');
setInterval(function()
{
http.get(
{
host: 'google.com'
}, function(res)
{
console.log(res.headers);
});
}, 3000);
var server = http.createServer(function(req, res)
{
res.writeHead(200);
setTimeout(function()
{
res.end("Web server response");
}, 1000);
});
server.listen(8000);
</code>
</pre>
</article>
</section>
<section>
<header class="box"><h2>Modulos</h2></header>
<article>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
module.exports =
{
main: function()
{
console.log('main');
};
}
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var moduloa = require('moduloa.js');
// edota
var moduloa = require('moduloa');
moduloa.main();
</code>
</pre>
</article>
<article>
<header class="box white"><h4>de otro modo</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var moduloa =
{
main: function()
{
console.log('main');
};
}
module.exports = moduloa;
</code>
</pre>
</article>
<article>
<header class="box white"><h4>module.exports vs exports</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
module.exports = {};
...
var module = require('module');
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
exports.module = {};
exports.a = {};
...
var parent = require('module');
var module = parent.module;
var a = parent.a;
</code>
</pre>
</article>
<article>
<header class="box white"><h4>object vs function</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var moduloa =
{
main: function()
{
this.name = 'nodejs kurtsoa';
};
}
module.exports = moduloa;
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var moduloa = require('./moduloa');
var moduloa2 = require('./moduloa');
moduloa.main();
console.log(moduloa2.name);
</code>
</pre>
</article>
<article>
<header class="box white"><h4>object vs function 2</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var moduloa = function()
{
this.main = function()
{
this.name = 'nodejs kurtsoa';
};
};
module.exports = moduloa;
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var moduloa = require('./moduloa');
var a = new moduloa();
var b = new moduloa();
a.main();
console.log(a.name);
console.log(b.name);
</code>
</pre>
</article>
<article>
<header class="box white"><h4>function en lugar de object para poder instanciar modulos</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var class_instance = function()
{
var private_var;
this.public_var;
var private_method = function()
{
console.log('private method');
};
this.public_method = function()
{
console.log('public method');
new private_method();
};
this.__construct = function()
{
console.log('__construct');
this.public_method();
};
this.__construct();
};
module.exports = class_instance;
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var a = require('./class_instance');
var b = new a();
</code>
</pre>
</article>
<article>
<header class="box white"><h4>Como usar "singleton"</h4></header>
<p>
Creando funciones estáticas dentro de un namespace.
</p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var singleton =
{
main: function()
{
console.log('main');
},
write: function(data)
{
console.log(data);
}
};
module.exports = singleton;
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var a = require('./singleton');
a.main();
a.write('proba');
</code>
</pre>
</article>
</section>
<section>
<header class="box"><h2>NPM</h2></header>
<article>
<blockquote>
Gestor de paquetes. Para instalar programas para node, publicarlas y gestionarlas.
</blockquote>
</article>
<article>
<header class="box white"><h4>buscar</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
npm search node-static
npm search socket.io
...
</code>
</pre>
</article>
<article>
<header class="box white"><h4>instalar</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
npm install node-static
npm install socket.io
</code>
</pre>
</article>
<article>
<header class="box white"><h4>instalar en el PATH de nodejs</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
npm install -g node-static
npm install -g socket.io
</code>
</pre>
<p>Para poder usarlo en nuestro proyecto:</p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
npm link node-static
npm link socket.io
</code>
</pre>
</article>
<article>
<header class="box white"><h4>desinstalar</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
npm uninstall -g node-static
npm uninstall socket.io
</code>
</pre>
</article>
<article>
<header class="box white"><h4>Publicar un modulo hecho por nosotros</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var zital_proba = function()
{
this.__construct = function()
{
console.log('zital-proba');
};
this.__construct();
};
module.exports = zital_proba;
</code>
</pre>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
npm adduser
npm init
...
package name: zital-proba
...
package version: (0.0.0): 0.0.1
...
Main module/entry point: (none): ./zital-proba.js
...
npm publish
</code>
</pre>
</article>
<article>
<header class="box white"><h4>Quitar un modulo de NPM</h4></header> <pre class="margin-top" contenteditable="true">
<code data-language="bash">
npm unpublish [email protected]
</code>
</pre>
</article>
</section>
<section>
<header class="box"><h2>SYNC vs ASYNC</h2></header>
<article>
<p>sync code:</p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var fs = require('fs');
var file = fs.readFileSync('a.txt', 'utf-8');
if(file)
console.log(file);
</code>
</pre>
<p>async code:</p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var fs = require('fs');
fs.readFile('a.txt', 'utf-8', function(err, data)
{
if(err)
throw err;
console.log(data);
});
</code>
</pre>
</article>
<article>
<header class="box white"><h4>async anidado</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var fs = require('fs');
fs.readFile('a.txt', 'utf-8', function(err, data)
{
if(err)
throw err;
console.log(data);
fs.readFile('b.txt', 'utf-8', function(err, data)
{
if(err)
throw err;
console.log(data);
fs.readFile('c.txt', 'utf-8', function(err, data)
{
if(err)
throw err;
console.log(data);
});
});
});
</code>
</pre>
</article>
<article>
<header class="box white"><h4>async paralelo</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var fs = require('fs');
fs.readFile('a.txt', 'utf-8', function(err, data)
{
if(err)
throw err;
console.log(data);
});
fs.readFile('b.txt', 'utf-8', function(err, data)
{
if(err)
throw err;
console.log(data);
});
fs.readFile('c.txt', 'utf-8', function(err, data)
{
if(err)
throw err;
console.log(data);
});
</code>
</pre>
</article>
</section>
<section>
<header class="box"><h2>Events: Crear</h2></header>
<article>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var emitter = require('events').EventEmitter;
var e = new emitter();
function log(text)
{
console.log(text);
}
e.on('hartu', log);
setInterval(function()
{
e.emit('hartu', Date.now());
}, 1000);
</code>
</pre>
</article>
<article>
<header class="box white"><h2>Quitar</h2></header>
<p>Hay que tener en cuenta que un "evento" puede tener asignado más de una función, por eso tenemos que mandarle el nombre del mismo.
</p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
...
setTimeout(function()
{
e.removeListener('hartu', log);
}, 1000);
...
</code>
</pre>
</article>
</section>
<section>
<header class="box"><h2>Socket.io</h2></header>
<article>
<blockquote>
Modulo para compartir datos en tiempo real entre navegadores y sistemas móviles, 100% javascript.
</blockquote>
<p>
<a href="http://socket.io/">http://socket.io/</a>
</p>
</article>
<article>
<header class="box white"><h4>Instalación</h4></header>
<p>En el servidor: </p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
npm install socket.io
</code>
</pre>
<p>En el cliente: </p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
cp node_modules/socket.io/node_modules/socket.io-client/dist/socket.io.js resources/js
</code>
</pre>
<p>index.html</p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
...
<script type="text/javascript" src="resources/js/socket.io.js"></script>
...
</code>
</pre>
</article>
<article>
<header class="box white"><h4>Uso</h4></header>
<p>En el servidor:</p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var io = require('socket.io').listen(1980);
io.sockets.on('connection', function (socket)
{
socket.emit('news', { hello: 'world' });
socket.on('my other event', function (data)
{
console.log(data);
});
});
</code>
</pre>
<p>En el cliente: </p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript" src="../../resources/js/socket.io.js"></script>
<script type="text/javascript">
$(window).on('load', function()
{
var socket = io.connect("http://"+window.location.host+":"+"1980");
socket.on('news', function (data)
{
console.log(data);
socket.emit('my other event', { my: 'data' });
});
});
</script>
</code>
</pre>
</article>
<article>
<header class="box white"><h4>Integración con el servidor</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
var http = require('http');
var server = http.Server(function(req, res)
{
res.writeHead(200);
res.end('Kaixo zertan zabilz?');
});
var io = require('socket.io').listen(server, {log: false});
io.sockets.on('connection', function (socket)
{
socket.emit('news', { hello: 'world' });
socket.on('my other event', function (data)
{
console.log(data);
});
});
server.listen(1980);
</code>
</pre>
</article>
<article>
<header class="box white"><h4>diferentes opciones de broadcast</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
// send to current request socket client
socket.emit('message', "this is a test");
// sending to all clients, include sender
io.sockets.emit('message', "this is a test");
// sending to all clients except sender
socket.broadcast.emit('message', "this is a test");
// sending to all clients in 'game' room(channel) except sender
socket.broadcast.to('game').emit('message', 'nice game');
// sending to all clients in 'game' room(channel), include sender
io.sockets.in('game').emit('message', 'cool game');
// sending to individual socketid
io.sockets.socket(socketid).emit('message', 'for your eyes only');
</code>
</pre>
<article>
</section>
<section>
<header class="box"><h2>Base de datos MongoDB</h2></header>
<article>
<blockquote>
Mongodb es un sistema de base de datos orientado a documentos.
Es de la familia NoSQL. A diferencia de las bases de datos clasicas, no se guarda en tablas relacionadas entre si.
Se guardan en documentos de estructura dinámica del tipo BSON de formato JSON (Binary JSON),
ayudando a aplicaciones a trabajar más rápido y más fácil.
</blockquote>
</article>
<article>
<header class="box white"><h4>instalación</h4></header>
<p>servidores tipo: gnu/linux</p>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
aptitude install mongodb
pacman -S mongodb
...
</code>
</pre>
<p>En otros sistemas: windows, osx... <a href="http://www.mongodb.org/downloads">http://www.mongodb.org/downloads</a></p>
<p>Cliente:</p>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
npm install node-gyp
npm install mongodb
</code>
</pre>
</article>
<article>
<header class="box white"><h4>consola mongo</h4></header>
<pre class="margin-top" contenteditable="true">
<code data-language="bash">
mongo
</code>
</pre>
<p>Mostrar la lista de bases de datos:</p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
db
</code>
</pre>
<p>Elegir la base de datos:</p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
use test
</code>
</pre>
<p>Crear una "collection" (tabla):</p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">
db.createCollection('kurtsoa')
</code>
</pre>
</article>
<article>
<header class="box white"><h4>guardar/borrar datos</h4></header>
<p>guardar:</p>
<pre class="margin-top" contenteditable="true">
<code data-language="javascript">