FastAPI – Websockets

FastAPI is a modern, fast (high-performance) web framework for building APIs with Python. It is designed to be easy to use and efficient, with support for websockets out of the box.

Websockets allow for real-time communication between the client and the server. This is especially useful for applications that require constant updates or notifications, such as chat applications, online games, or real-time dashboards.

With FastAPI, you can easily create websocket endpoints using the WebSocket class from the starlette.websockets module. Here’s an example of how you can create a simple websocket endpoint:

from fastapi import FastAPI
from starlette.routing import WebSocketRoute

app = FastAPI()

async def websocket_endpoint(websocket):
    await websocket.accept()
    while True:
        data = await websocket.receive_text()
        await websocket.send_text(f"Message received: {data}")

app.add_websocket_route('/ws', websocket_endpoint)

In the example above, we define a websocket endpoint at “/ws” that echoes back any message it receives. When a client connects to this endpoint, it will receive a message stating that the connection has been accepted. Any messages sent by the client will be echoed back to the client.

FastAPI makes it easy to work with websockets, providing a clean and simple API for handling real-time communication. Whether you’re building a chat application, a real-time dashboard, or any other application that requires real-time updates, FastAPI’s websockets support can help you get the job done quickly and efficiently.