express post request code example
Example 1: react post request
componentDidMount() {
// Simple POST request with a JSON body using fetch
const requestOptions = {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ title: 'React POST Request Example' })
};
fetch('https://jsonplaceholder.typicode.com/posts', requestOptions)
.then(response => response.json())
.then(data => this.setState({ postId: data.id }));
}
Example 2: express hello world
//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 express
Example 3: express get url parameters
app.get('/path/:name', function(req, res) {
res.send("tagId is set to " + req.params.name);
});
Example 4: express receive post data
const { id } = req.body;
Example 5: node 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);
Example 6: node js express url parameters
// http://localhost:8080/api/1
app.get('/api/:version', function(req, res) {
res.send(req.params.version);
});