Create an XML for the bookstore. Validate the same using both DTD and XSD.
☛ Open Terminal or Command Prompt:
Open a terminal or command prompt in the directory where you saved your server.js file.
☛ Run the Server Script:
Execute the server script using the Node.js runtime. In the terminal, run:
node server.js
This will start the HTTP server, and you should see the message "Server running at http://127.0.0.1:3000/".
☛ Access the Server:
Open your web browser and navigate to http://127.0.0.1:3000/ or http://localhost:3000/. You should see the response "Hello, World!".
☛ Check OS Information:
In the same terminal where your server is running, you'll see information about your operating system (OS) type, platform, architecture, CPU cores, etc.
☛ Check Current Working Directory:
The current working directory of the script is printed in the terminal.
☛ Check Joined Path:
The joined path using the path module is printed in the terminal.
☛ Check Custom Event:
The script emits a custom event and listens for it. In the terminal, you should see the message "Custom Event Triggered: { message: 'Hello from custom event!' }".
☛ Stop the Server:
To stop the server, press Ctrl+C in the terminal where the server is running.
server.js
// Step 1: Import required modules
const http = require('http');
const os = require('os');
const path = require('path');
const { EventEmitter } = require('events');
// Step 2: Create an instance of EventEmitter
const eventEmitter = new EventEmitter();
// Step 3: Create a simple HTTP server
const server = http.createServer((req, res) => {
res.writeHead(200, { 'Content-Type':'text/plain' });
res.end('Hello, World!\n');
});
// Step 4: Define server port and hostname
constport = 3000;
consthostname = '127.0.0.1';
// Step 5: Listen for requests on the specified port and hostname
server.listen(port, hostname, () => {
console.log('Server running at http://${hostname}:${port}/');
});
// Step 6: Print OS information
console.log('OS Type:', os.type());
console.log('OS Platform:', os.platform());
console.log('OS Architecture:', os.arch());
console.log('CPU Cores:', os.cpus().length);
// Step 7: Print current working directory
console.log('Current Working Directory:', process.cwd());
// Step 8: Join paths using the path module
const joinedPath = path.join(__dirname, 'public', 'images');
console.log('Joined Path:', joinedPath);
// Step 9: Handle a custom event
eventEmitter.on('customEvent', (data) => {
console.log('Custom Event Triggered:', data);
});
// Step 10: Emit a custom event
eventEmitter.emit('customEvent', { message:'Hello from custom event!' });
Output :
In the Terminal:
In the Browser:
Link: http://127.0.0.1:3000/
