Websocket | Deno | Page 1

Hello! For building applications with WebSocket support in Deno, you can consider using the native WebSocket API that Deno provides. The documentation includes an example of a chat application that utilizes WebSockets, which can be a great starting point for understanding how to implement WebSocket communication in Deno. 🦕

Here's a simplified version of how you might handle WebSocket connections in Deno:

// Import the serve function from the standard library
import { serve } from "https://deno.land/std/http/server.ts";

// Create a new server
serve((req) => {
  // Check if the request is trying to upgrade to a WebSocket
  if (req.headers.get("upgrade") !== "websocket") {
    return new Response(null, { status: 501 });
  }

  // Upgrade the request to a WebSocket
  const { socket, response } = Deno.upgradeWebSocket(req);

  socket.addEventListener("open", () => {
    console.log("A client connected!");
  });

  socket.addEventListener("message", (event) => {
    console.log("Received message:", event.data);
    // You can send messages back to the client using `socket.send()`
  });

  socket.addEventListener("close", () => {
    console.log("A client disconnected");
  });

  // Return the response to complete the upgrade
  return response;
});

To run this example, you would use the following command:

deno run --allow-net your_script.ts

Remember to replace your_script.ts with the path to your Deno script.

This example demonstrates how to set up a basic WebSocket server that can accept connections, receive messages, and handle disconnections. You can use this as a foundation for building more complex applications, including mobile app backends that require real-time communication.

If you're looking for a higher-level framework that

supports WebSockets and is designed for Deno, you might want to explore frameworks like Fresh, Hono, or Oak. These frameworks offer various abstractions and utilities that can simplify the development of WebSocket-based applications. 🦕

For more detailed examples and guidance, you can refer to the Deno documentation on creating a chat application with WebSocket or explore the available web frameworks that support Deno.

Helpful Links:
Chat application with WebSocket | Deno Docs
Web Frameworks | Deno Docs
First Steps | Deno Docs
The State of Web Frameworks on Deno
Building websites and apps with Deno
Deno Runtime Quick Start | Deno Docs
HTTP Server: WebSockets - Deno by Example
Chat application with WebSocket

#Websocket