why do we do create server on node js code example
Example 1: how to create node js server
const http = require("http");
const PORT = 3000;
const server = http.createServer((req, res) => {
if (req.url === "/") {
res.write("This is home page.");
res.end();
} else if (req.url === "/about" && req.method === "GET") {
res.write("This is about page.");
res.end();
} else {
res.write("Not Found!");
res.end();
}
});
server.listen(PORT);
console.log(`Server is running on PORT: ${PORT}`);
const express = require("express");
const app = express();
app.get("/", (req, res) => {
res.send("This is home page.");
});
app.post("/", (req, res) => {
res.send("This is home page with post request.");
});
const PORT = 3000;
app.listen(PORT, () => {
console.log(`Server is running on PORT: ${PORT}`);
});
Example 2: create server with node js
const express = require('express');
const server = express();
const PORT = 3000;
server.get('/', (req, res) => {
return res.send("<h1 style='text-align: center;'>Hello,<br />from the Express.js server!</h1>");
})
server.get('/about', (req, res) => {
return res.send('<h2 style="text-align:center">About us</h2>');
})
server.use((req, res, next) =>{
res.status(404);
if (req.accepts('html')) {
res.sendFile(__dirname + '/error404.html');
return;
}
else if (req.accepts('json')){
res.send({
status: 404,
error: 'Not found'
});
return;
}
else {
res.type('txt').send('Error 404 - Not found');
}
});
server.listen(PORT, () => {
console.log(`Server is running on port ${PORT}`);
});