spilo 0.0.19

Lightweight library for developing real time applications

SPILO

Spilo is lightweight library for developing real time applications which helps developers managing websocket clients effectively and gives ability to scale horizontaly for handling large amount of clients.

Installation

$ pip install spilo

Here's example of the backend code for a simple websocket server:

server.py

from dataclasses import dataclass
import uuid
from fastapi import FastAPI, WebSocket, WebSocketDisconnect
from spilo.channel import Channel
from spilo.base_client import BaseClient
from spilo.redis_pubsub import RedisPubSub

app = FastAPI()
redis_pubsub = RedisPubSub()
redis_pubsub.connect()


@dataclass
class Client(BaseClient):

    protocol: WebSocket

    def __hash__(self):
        return self.client_id.int

    async def send(self, data):
        await self.protocol.send_text(str(data))

    async def close(self):
        await self.protocol.close()


@app.websocket("/ws/{channel_name}")
async def websocket_endpoint(websocket: WebSocket, channel_name: str):
    await websocket.accept()
    client = Client(protocol=websocket)
    channel = Channel.get(channel_name, redis_pubsub)
    channel.add_client(client)
    try:
        while True:
            data = await websocket.receive_text()
            await channel.publish(data)
    except WebSocketDisconnect:
        await channel.remove_client(client)