NodeJS

Create HTTP Server using express.js

Express is a minimal and flexible NodeJS web application framework that provides a robust set of features for we ad mobile applications.

Globally many framework based on ExpressJS Such as :


How to create http server using ExpressJS ?

The following example uses express to create a HTTP Server listening on port 3000, you can use any port

which you want.

make sure you have already installed nodejs in your system to run this example.

First create a folder to keep all files seperate from others

e.g i created a folder myapp, go into this and install express framework using this command


npm install --save express


NOTE: I suppose you have alreayd initiated node application that's why not showing all first few steps for fresh application initialization.

create a new javascript file containing following code (let's name it index.js for example)

index.js

// Import the top-level function of express
const express = require('express');

// Creates an Express application using the top-level function
const app = express();

// Define port number as 3000
const port = 3000;

// Routes HTTP GET requests to the specified path "/"
app.get('/', function(request, response) {
   response.send('Hello, World!');
});

// Make the app listen on port 3000
app.listen(port, function() {
   console.log('Server listening on http://localhost:' + port);
});


from the command line run the following command:

node index.js

Open your browser and navigate to http://localhost:3000 or http://127.0.0.1:3000 to see the response.

Manav

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