FastAPI WebSocket Demo

This project demonstrates a simple WebSocket chat app using FastAPI and Python.

Features

• A FastAPI server with a WebSocket endpoint at /ws
• A simple Python client that connects to the server
• Automatic fallback to another local port if port 8000 is busy

Requirements

Install the dependencies:

pip install -r requirements.txt

Run the Server

In one terminal, start the server:

python .\server.py

The server will start on http://127.0.0.1:8000 unless that port is unavailable, in which case it will use the next available port.

Run the Client

In another terminal, start the client:

python .\client.py

Type a message and press Enter. The server will receive it and send a JSON response back.

Files

• server.py - FastAPI WebSocket server
• client.py - WebSocket client
• requirements.txt - Python dependencies