Nodejs Getting Started learning

Basis

node. js is a JavaScript runtime environment written in C + + that features: event-driven, asynchronous i/0. As a server-side JavaScript interpreter, node is a lightweight and efficient development platform that allows users to build responsive, highly scalable Web applications that use event-driven and non-blocking I/O models and are ideal for developing distributed applications that are data-intensive and demand high real-time response.

Server.js//Simple HTTP Server

var http = require (' http '); http.createserver(function(req, res) {    Res.writehead ( {' Content-type ': ' Text/plain '});    Res.end (' Hello world\n ');}). Listen (8888); Console.log (' server running at http://127.0.0.1 ');

Execution: Node Server.js

Module

Main.js

var hello = require ('./hello '); Hello.world ();

Hello.js

function () {    console.log (' Hello World ');}

Main1.js

var Hello = require ('./hello1 'new  Hello (); Hello.setname (' AAA '); Hello.sayhello ();

Hello1.js

function Hello () {    var  name;      This function (myname) {        = myname;    }      This function () {        console.log (' hello ' + name);     = Hello;

Event

Event.js

var Eventemitter = require (' Events '). Eventemitter; var New Eventemitter (); Event.on (function() {    console.log (' event1 occured. ') );}); SetTimeout (function() {    event.emit (' event1 '1000);

Event1.js

var events = require (' Events '); var New events. Eventemitter (); Emitter.on (function(arg1, arg2) {    console.log (' listener1 ', arg1, ARG2);}); Emitter.on (function(arg1, arg2) {    console.log (' Listener2 ', arg1, arg2);}); Emitter.emit (' event1 ', ' AAA ', 123);

More reference http://www.w3cschool.cc/nodejs/nodejs-event.html

Routing

Index.js

var server = require ('./server '); var router = require ('./router '); Server.start (Router.route);

Server.js

varHTTP = require (' http ');varurl = require (' URL '));functionStart (route) {functiononrequest (req, res) {varpathname =Url.parse (req.url). Pathname; Console.log (' Request for ' + pathname + ' received. ');        Route (pathname); Res.writehead ($, {' Conten-type ': ' Text/plain '}); Res.write (' Hello, World ');    Res.end (); } http.createserver (ONrequest). Listen (8888); Console.log (' Server has started. ');} Exports.start= start;

Router.js

function Route (pathname) {    console.log (' about-route a request for ' += route;

Nodejs Getting Started learning