express js example
//to run : node filename.js
const express = require('express')
const app = express()
const port = 3000
app.get('/', (req, res) => res.send('Hello World!'))
app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`))
//visit localhost:3000
// assuming you have done 1) npm init 2) npm install expressnode express post request json
var express = require('express');
var app = express();
app.use(express.json()); // built-in middleware for express
app.post('/', function(request, response){
let myJson = request.body; // your JSON
let myValue = request.body.myKey; // a value from your JSON
response.send(myJson); // echo the result back
});
app.listen(3000);express get url parameters
app.get('/path/:name', function(req, res) {
res.send("tagId is set to " + req.params.name);
});express redirect
app.get('/', (req, res) => {
res.redirect('/foo/bar');
});express post method
fetch('',{
method:'POST',
headers:{
'content-type': 'application/json'
},
body:JSON.stringify(users)
})
.then(res=> res.json())
.then(data => console.log(data))app.post (req res) get data
const express=require('express');
const app=express();
//accept Post with no midleWare express
app.post("/register/",function(req,res){
var bodyStr = '';
req.on("data",function(chunk){
bodyStr += chunk.toString();
});
req.on("end",function(){
res.send(bodyStr);
});
});Copyright © 2021 Codeinu
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