How many way we can create server for Http1 and Http2 node js

shubhammishra107 — Thu, 29 Jun 2023 13:52:44 +0000

In this Article, we will learn how to create a simple Node.js web server and handle HTTP and Http2 requests.
Node.js is an open-source and cross-platform JavaScript runtime environment. It is most popular tool for almost any kind of project like web and static as well report generation UI .
Node.js runs the V8 JavaScript engine, the core of Google Chrome, outside of the browser. This allows Node.js to be very performant.

To follow along with this tutorial - the reader will need the following:

A basic knowledge of JavaScript programming is essential.
Having basic idea of Node.js installed on your machine.

Following are way to create Server in node js

1) Creating Server using ‘http‘ Module:

Import http module: Import http module and store returned HTTP instance into a variable.

var express = require('express');
var path = require('path');
var netjet = require('netjet');
const root = path.join(__dirname, '/public')
const app = express()

app.set('views', path.join(__dirname, 'view'));

app.set('view engine', 'ejs')

app.get("/", async (req, res) => {
res.render("index")
})

app
.use(netjet({
cache: {
max: 100
}
}))
.use(express.static(root))
.listen(3008);

2) Creating Server using ‘http2‘ Module:

Import http module: Import http module and store returned HTTP2 instance into a variable.

const http2Express = require('http2-express-bridge')
const http2 = require('http2')
const { readFileSync } = require('fs')
const express = require("express")
const fs = require("fs")
var path = require('path');
var cors= require('cors')

const app = http2Express(express)
const bodyParser = require("body-parser");
app.use(cors());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended : true}));

const PUBLIC_PATH = path.join(__dirname, '/public')

app.use(express.static("public"))
app.set('views', path.join(__dirname, 'view'));

app.set('view engine', 'ejs')

const options = {
key: fs.readFileSync("./server.key"),
cert: fs.readFileSync("./server.crt")
};

app.get('/', function (req, res) {
res.render('index')
})

const server = http2.createSecureServer(options,app)
server.listen(3000, () => {
console.log(listening on port 3000)
})

3) Creating Server using ‘http2‘ Module:

Import http module: Import http module and store returned spdy instance into a variable.

app.get("/", async (req, res) => {
res.render("index")
})

spdy.createServer(
{
key: fs.readFileSync("./server.key"),
cert: fs.readFileSync("./server.crt"),
spdy: {
plain: false,
protocols: [ 'h2', 'spdy/3.1','spdy/2','spdy/3', 'http/1.1' ],
'x-forwarded-for': true
}
}
,
app

).listen(3000, (err) => {
if(err){
throw new Error(err)
}
console.log("Listening on port 3000")
})

Conclusion

Here we learn about different ways in nodejs .
We import module like http , http2 and spdy to create server.
Now, run your web server using node app.js. Visit http://localhost:3000 and you will see a message saying "Hello World".
Refer to the Introduction to Node.js for a more comprehensive guide to getting started with Node.js.

More Examples
See https://github.com/nodejs/examples for a list of Node.js examples that go beyond hello world.

Exponentiation operator in js

shubhammishra107 — Sun, 04 Jun 2023 18:30:00 +0000

exponentiation in javascipt, #exponentiation symbol , #operator #arithmetic operator #javascipt

Exponentiation operator in javascript

The result of increasing the first operand to the power of the second operand is returned by the exponentiation (**) operator.

• The exponentiation operator (**) raises the first operand to the power of the second operand.

Example
let x = 5;
let z = x ** 2;

o/p= 5sq=25

• x ** y produces the same result as Math.pow(x,y):

Example
let x = 5;
let z = Math.pow(x,2);

Conclusion:

There has been rapid development and changes in information technology plateform. so javascript is tranding in market .We write article on exponentiation operator and there is many operator like Arithmetic Operators; Assignment Operators; Comparison Operators; String Operators; Logical Operators .see you in next topic of javascript .If you feel any doubt and query please connect on social medium patform on below in bottom.

find below List of different operator in Javascript

JS Arithmetic Operators
JS Assignment Operators
JS Comparison Operators
JS Logical Operators
JS Ternary Operators
JS Bitwise Operators
JS typeof Operator

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