Related Topics
React JS
Angular JS
Node JS
const WebSocket = require('ws');
const wss = new WebSocket.Server({ port: 8080 });
wss.on('connection', function connection(ws) {
console.log('Client connected');
ws.on('message', function incoming(message) {
console.log(`Received message: ${message}`);
});
ws.send('Welcome to the WebSocket server');
});
In this example, we create a WebSocket server that listens on port 8080. When a client connects to the server, the connection event is emitted and we can perform any necessary initialization, such as logging the connection.
The ws object representing the WebSocket connection provides an on method to handle incoming messages. In this example, we log any incoming messages to the console.
To send a message to the client, we can use the send method on the ws object.
The benefits of using websockets compared to traditional HTTP connections are that websockets enable real-time communication between a client and server without the need for constant polling, reducing latency and improving responsiveness. Websockets can be used for applications such as real-time chat, online gaming, and collaborative document editing.
const http = require('http');
const options = {
hostname: 'www.example.com',
path: '/',
method: 'GET'
};
const req = http.request(options, (res) => {
console.log(`statusCode: ${res.statusCode}`);
res.on('data', (data) => {
console.log(data.toString());
});
});
req.on('error', (error) => {
console.error(error);
});
req.end();
In this example, we are making a GET request to www.example.com. The options object specifies the hostname, path, and method of the request. The http.request method returns a http.ClientRequest object, which we can use to write data to the request body if needed (in this case, we are not sending any data, so we don’t need to use this). We then attach an event listener to the response event of the request object, which will be called when the response is received. We can then read the response data in chunks by attaching an event listener to the data event of the response object. Finally, we attach an event listener to the error event of the request object in case an error occurs.
The https module works similarly to the http module, except that it is used for making HTTPS requests. You will need to specify additional options such as the ca option to verify SSL certificates. You can also use the get method of the https module to make a simple GET request, which will handle many of the options for you automatically.
Common methods used in HTTP and HTTPS requests include GET, POST, PUT, DELETE, and PATCH. Options such as headers, query parameters, and cookies can also be specified in the options object. In addition, there are many third-party libraries available that provide more advanced functionality for making network requests in Node.js.
Popular Category
Topics for You
React JS
Angular JS
Go through our study material. Your Job is awaiting.