MIDDLEWARE IN nodejs |nodejs tutorials

 

midleware before responding to actual request middleware responds 

in below middleware , we wil not pass params, it willl get automaticlly

const logger =(req,res,next)=>{}

const logger =()=>{

const method = req.method

const url = req.url

const time = new Date().getFullYear()

console.log(method,url,time)

next()

}

app.get('/'. logger, ()=>{})

app.get('/',logger, (req,res)=>{

res.send('HOME');

})

 

write that loggger in seperate page

logger.js

const logger = ()=>{}

module.exports = logger

import taht logger 

const logger = require('./logger');

use taht logger as middleware

app.get('/name',logger)

app.get('/name2',logger)

instead of using in all paths we can use app.use

app.use(logger)

app.get('/name')

app.get('/name2')

j

how to use multuiple middlewares

Authorize middleware

const authorize = (req,res,next) => 

{

console.log('authorize')

next()

}

impor this authorize middleare

app.use([authorize,logger])

get the id from name using authorize middleware

multiple middlwares for single api

app.get('/',[logger,authorize], (req,res)=>{

res.send('HOME');

})

morgan

npm i morgan

it logs for every http request 

require('morgan')

app.use(mogan('tiny'));

it brings from public folder

app.use(express.static(''./public));

 app.use(express.static(''./methods-public));

 if in this folder it has any  files taht wil reflect ist

like login page

previously we imported individual pages like script, css, index but now we use one folder directly 

so because of this it will will call after page loads

means login must for any page

get data into required file using api 

after click submit do axios post

https://github.com/john-smilga/node-express-course/blob/main/02-express-tutorial/methods-public/javascript.html

in request data there , if not there