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 typing import Dict
from dataclasses import dataclass
from fastapi import FastAPI, WebSocket
from spilo.channel import Channel
from spilo.base_client import BaseClient
from spilo.redis_pubsub import RedisPubSub
from spilo.event_registry import EventRegistry
app = FastAPI()
redis_pubsub = RedisPubSub()
redis_pubsub.connect()
event_registry = EventRegistry(event_key_name="event_type")
@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()
async def listen(self):
return await self.protocol.receive_text()
@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, event_registry)
channel.add_client(client)
await channel.listen_client(client)
@event_registry.on("test")
async def test_event_handler(data: Dict, client: BaseClient, channel: Channel):
await client.send(str(data))
await channel.publish({"event_type": "test", "data": "test_data"})
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