SETTING UP EXPRESS

IN THE BACKEND FOLDER, WE WILL INITIALIZE ALL THE REQUIRED FRAMEWORKS.
WE WILL RUN THE COMMAND, npm init TO INITALIZE PACKAGE.JSON

IN THE PACKAGE.JSON FILE, WE WILL GIVE A START COMMAND,
  "scripts": {
    "start": "nodemon index.js"
  },

WE WILL USE NODEMON FOR DISPLAYING AND ADJUST ACCORDING TO THE CHANGES MADE.

       npm -D nodemon

-D  refers to DEVELOPER DEPENDENCIES,
 "devDependencies": {
    "nodemon": "^3.1.9"
  },

WE WILL INSTALL ALL THE REQUIRED FRAMEWORKS,DEPENDENCIES,PACKAGES FOR THE PROJECT,

npm i express cors body-parser mongoose passport passport-local-mongoose dotenv

EXPRESS 

CORS - CROSS ORIGIN RESOURCE SHARING , IT ESTABLISHES COMMUNICATION BETWEEN FRONT-END AND BACKEND.

WHEN FRONTEND APPLICATION AND BACKEND APPLICATION ARE RUNNING ON DIFFERENT SERVERS, WE USE CORS FOR COMMUNICATION BETWEEN THEM.
IT ENHANCES SECURITY.


BODY-PARSER

HELPS TO WORK WITH THE DATA RECEIVED THROUGH API'S.

MONGOOSE 

USED FOR DATABASE CONNECTIVITY AND TO PERFORM DATABASE RELATED TASKS.

PASSPORT  AND PASSPORT-LOCAL-MOGOOSE

FOR AUTHENTICATION

DOTENV

FOR STORING ENVIRONMENT VARIABLES THAT ARE CONFIDENTIAL THIS FILE IS IGNORED DURING DEPLOYMENT.


PACKAGE.JSON
{
  "name": "backend",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "start": "nodemon index.js"
  },
  "author": "abhi",
  "license": "ISC",
  "description": "",
  "devDependencies": {
    "nodemon": "^3.1.9"
  },
  "dependencies": {
    "body-parser": "^2.2.0",
    "cors": "^2.8.5",
    "dotenv": "^16.4.7",
    "express": "^5.1.0",
    "mongoose": "^8.13.2",
    "passport": "^0.7.0",
    "passport-local-mongoose": "^8.0.0"
  }
}



INDEX.JS
const express = require("express");
const app = express();

app.listen("8000", () => {
  console.log("port listening to 8000");
});









Comments

Post a Comment

Popular posts from this blog

*********UPDATING THE FRONTEND*********

Image
 WE WILL BEGIN WITH UPDATING THE FOOTER, IN FOOTER.JS import React from "react" ; function Footer () {   return (     <>       < div className = "footer" >         < div className = " f-brand " > &copy; TradeEasy Private Ltd </ div >         < div className = "f-info-socials  " >           < br />< br />< br />           < a href = "https://www.linkedin.com/in/abhishek-kumar5471/" >             < i class = "fa-brands fa-linkedin" ></ i >           </ a >           < a href = "https://github.com/abhishekkumar71" >             < i class = "fa-brands fa-github" ></ i >           </ a >         ...
Read more

**************** EXTRACTING DATA FROM API **************

Image
 TILL NOW WE USED DUMMY DATA FROM DATA.JS AS THE STOCK INFORMATION. NOW,WE WILL USE AN API THAT GIVES THE STOCK INFORMATION. WE WILL USE ALPHAVANTAGE FOR THE REQUIRED INFORMATION. SIGNUP IN ALPHAVANTAGE, YOU WILL RECEIVE AN API KEY  STORE IT IN .ENV FILE .ENV   API_KEY = AKJOQXMHFNU7**** IN ALPHAVANTAGE WE USE THE URL TO FETCH DATA , IN THE URL THERE ARE SOME FIXED PARAMETERS THAT SHOLUD BE INCLUDED IN THE URL. (READ API DOCUMENTATION OF ALPHA VANTAGE). THEY ARE API KEY, FUNCTION AND SYMBOL.   const rawSymbol = req . params . symbol . toUpperCase ();   const fetchStockData = async ( symbolVariant ) => {     const { data } = await axios . get ( "https://www.alphavantage.co/query" , {       params : {         function : "TIME_SERIES_DAILY" ,         symbol : symbolVariant ,         outputsize : "compact" ,         apikey : key ,   ...
Read more