a day ago
- WebSockets allow real-time two-way communication with a web server, reducing overhead compared to standard HTTP.
- The client-side implementation involves creating a WebSocket object, setting up event listeners for open, close, error, and message events, and handling them with appropriate functions.
- The chat client UI includes a chat output area, username and message input fields, and a Send button, with auto-scrolling and HTML sanitization to prevent XSS attacks.
- Security measures like escaping HTML special characters are crucial to prevent code injection from untrusted user input.
- The example code demonstrates sending messages as JSON with type and payload, and handling different message types like chat-join, chat-leave, and chat-message.
- The implementation has limitations, such as weak username tracking, lack of authentication, and poor UI and code structure for scalability.