sandeep-cs-dev

Let's Encrypt

Examples of getting certificates from Let's Encrypt working on Apache, NGINX and Node.js servers.

Obtain certificates

I chose to use the manual method, you have to make a file available to verify you own the domain. Follow the commands from running

git clone https://github.com/letsencrypt/letsencrypt
cd letsencrypt

sandeep-cs-dev

const http2 = require('http2');
const fs = require('fs')
let options = {
    key: fs.readFileSync('server.key'),
    cert: fs.readFileSync('server.crt'),
    allowHTTP1: true
}

const server = http2.createSecureServer(options, function(req, res) {

sandeep-cs-dev

const http2 = require('http2');
const fs = require('fs')
let res = [];
let postbody = JSON.stringify({
    message: "http2 client"
});
let baseurl = 'https://localhost:8080'
let path = '/'
let options = {
    ca: fs.readFileSync('server.crt'),

sandeep-cs-dev

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

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INSERT GRAPHIC HERE (include hyperlink in image)

Repository Title Goes Here

Subtitle or Short Description Goes Here

sandeep-cs-dev

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

sandeep-cs-dev

const { Worker } =  require("worker_threads");

const imageResizer = function (imagePath, size,outputPath) {

  return  new  Promise((resolve, reject) => {
    
  const  worker  =  new  Worker(__dirname + "/image-resize-worker.js", {
    workerData: {imagePath:imagePath, size:size,outputPath:outputPath}
  });
  

sandeep-cs-dev

const { parentPort, workerData } =  require("worker_threads");
const  sharp  =  require("sharp");

async  function  resize() {

    const { imagePath,size,outputPath } =  workerData;
   
    console.log("=======workerData======",workerData);
    
    // sharp(imagePath).metadata().then((res)=>{

sandeep-cs-dev

'use strict';
const { Worker, isMainThread, parentPort, workerData } = require('worker_threads');
const min = 2;
let primes = [];
function generatePrimes(start, range) {
  let isPrime = true;
  let end = start + range;
  for (let i = start; i < end; i++) {
    for (let j = min; j < Math.sqrt(end); j++) {
      if (i !== j && i%j === 0) {

sandeep-cs-dev

const encrptfile =  require('./encrypt-file.js')
const filePath =  __dirname+"/test.txt";

encrptfile(filePath).then(function(res){
 console.log(res);
})