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Showing posts from April, 2018

How to implement routing in Nodejs

A route is a mapping from a url to an object.It handles HTTP client requests. Basic Routing Hope you have install and have basic knowledge Express module. npm install express Note: Above command download the required express modules and install them. Here is our Server file. var express = require( 'express' ); var app = express(); //Creating Router() object var router = express.Router(); // Provide all routes here, this is for Home page. router.get("/",function(req,res){   res.json({"message" : "Hello World"}); }); app.use("/",router); // Listen to this Port app.listen(3000,function(){   console.log("Live at Port 3000"); }); Code Explanation: 1. In our first line of code, include the "express module." 2. Create object of the express module. 3. Creating a callback function. This function call when you hit url from browser http://localhost:3000 .It send the string 'Hello World' to

How to implement Real time notification in NodeJs

Here are simple steps to create real time notification using NodeJs, and Mysql Socket.IO enables real-time bidirectional event-based communication.It has two parts: a client-side library that runs in the browser, and a server-side library for node.js. Install Socket.IO npm install --save I hope you have install express and mysql. This are basic few code inside server file. var express = require( 'express' ); var app = express(); app.use( express.static( __dirname + '/public') ); var mysql = require('mysql'); var server = require( 'http' ).Server( app ); var io = require( '' )( server ); server.listen( 3000, function(){   console.log( 'listening on *:3000' ); } ); app.get('/', function(req, res) {    res.sendFile(__dirname + '/index.html'); }); The require('')(http) creates a new instance attached to the http server. Now make mysql conn