miguelgrinberg.python-socketio/examples/server/sanic/app.py

from sanic import Sanic
from sanic.response import html

import socketio

sio = socketio.AsyncServer(async_mode="sanic")
app = Sanic(__name__)
sio.attach(app)


async def background_task():
    """Example of how to send server generated events to clients."""
    count = 0
    while True:
        await sio.sleep(10)
        count += 1
        await sio.emit("my_response", {"data": "Server generated event"})


@app.listener("before_server_start")
def before_server_start(sanic, loop):
    sio.start_background_task(background_task)


@app.route("/")
async def index(request):
    with open("app.html") as f:
        return html(f.read())


@sio.event
async def my_event(sid, message):
    await sio.emit("my_response", {"data": message["data"]}, room=sid)


@sio.event
async def my_broadcast_event(sid, message):
    await sio.emit("my_response", {"data": message["data"]})


@sio.event
async def join(sid, message):
    await sio.enter_room(sid, message["room"])
    await sio.emit(
        "my_response", {"data": "Entered room: " + message["room"]}, room=sid
    )


@sio.event
async def leave(sid, message):
    await sio.leave_room(sid, message["room"])
    await sio.emit("my_response", {"data": "Left room: " + message["room"]}, room=sid)


@sio.event
async def close_room(sid, message):
    await sio.emit(
        "my_response",
        {"data": "Room " + message["room"] + " is closing."},
        room=message["room"],
    )
    await sio.close_room(message["room"])


@sio.event
async def my_room_event(sid, message):
    await sio.emit("my_response", {"data": message["data"]}, room=message["room"])


@sio.event
async def disconnect_request(sid):
    await sio.disconnect(sid)


@sio.event
async def connect(sid, environ):
    await sio.emit("my_response", {"data": "Connected", "count": 0}, room=sid)


@sio.event
def disconnect(sid, reason):
    print("Client disconnected, reason:", reason)


app.static("/static", "./static")


if __name__ == "__main__":
    app.run()