Tutorial: WebSocket App¶

Let’s build a real-time app that exchanges messages between browser and server using Pyplet’s WebSocket protocol. We’ll use the chat example as a reference.

Client: handling input and messages¶

--8<-- "apps/pyplet_examples/examples/chat_client.py"

The client:

• Renders a text input and listens for changes
• Sends messages over the socket and appends new messages to the DOM
• Handles the server closing by checking for the closing_message sentinel

Server: broadcasting to all clients¶

--8<-- "apps/pyplet_examples/examples/chat_server.py"

The server loop:

• Assigns a username from a pool and sends an init handshake
• Broadcasts messages to all connected sockets
• Cleans up on disconnect

Run it¶

Start the server and open multiple browser tabs to the chat app’s URL. You should see messages broadcast in real-time.