Setup Socket.io Nodejs Server on Heroku

It’s all free

Key Remarks

• Install Heroku CLI
• We have to use the environment port: Number(process.env.PORT || “80”). It will use 80 port to map into the internal port
• Heroku will use Free Dyno to host the application. When there is no activity, the application will auto shutdown. Check Used Dyno Hours
• heroku ps // check free dyno hours
• You can deploy multiple process

Setup Project & Deployment

heroku login
npm init // create new node project
git init // init git
git add . // add files
git commit -m "Initial commit" // commit the files
heroku create // create app on heroku
// or
heroku git:remote -a heroku-testing // add by project name
// Deployment Below
git add .
git commit -m "New commit" 
git push heroku master // deploy 
heroku logs -n 200

.gitignore

/node_modules
npm-debug.log
/*.env
.idea

Package.json

{
  "name": "heroku-testing",
  "version": "1.0.0",
  "description": "",
  "main": "build/App.js",
  "dependencies": {
    "socket.io": "^2.2.0",
    "socket.io-client": "^2.2.0",
    "debug": "^4.1.1"
  },
  "devDependencies": {
    "@types/chai": "^4.1.7",
    "@types/mocha": "^5.2.6",
    "@types/node": "^11.13.5",
    "@types/socket.io": "^2.1.2",
    "@types/socket.io-client": "^1.4.32",
    "@types/debug": "^4.1.4",
    "chai": "^4.2.0",
    "mocha": "^6.1.4",
    "source-map-support": "^0.5.12",
    "ts-node": "^8.1.0"
  },
  "scripts": {
    "start": "set DEBUG=app* & node build/App.js",
    "logs": "heroku logs -n 350",
    "commit": "git add . & git commit -m 'auto' & git push heroku master",
    "test local": "set DEBUG=app* & node build/TestLocal.js",
    "test production": "set DEBUG=app* & node build/TestProduction.js"
  }
}

Create Socket.io Server

Create Socket.io Client

Testing Script

Replace the host with the public domain of Heroku

import {SocketClient} from "./SocketClient";

const socketClient: SocketClient = new SocketClient("http://127.0.0.1:80", "userId=1");