WebSocketΒΆ
Sanic provides an easy to use abstraction on top of websockets. Sanic Supports websocket versions 7 and 8.
To setup a WebSocket:
from sanic import Sanic
from sanic.response import json
from sanic.websocket import WebSocketProtocol
app = Sanic("websocket_example")
@app.websocket('/feed')
async def feed(request, ws):
while True:
data = 'hello!'
print('Sending: ' + data)
await ws.send(data)
data = await ws.recv()
print('Received: ' + data)
if __name__ == "__main__":
app.run(host="0.0.0.0", port=8000, protocol=WebSocketProtocol)
Alternatively, the app.add_websocket_route
method can be used instead of the
decorator:
async def feed(request, ws):
pass
app.add_websocket_route(feed, '/feed')
Handlers for a WebSocket route is invoked with the request as first argument, and a
WebSocket protocol object as second argument. The protocol object has send
and recv
methods to send and receive data respectively.
You could setup your own WebSocket configuration through app.config
, like
app.config.WEBSOCKET_MAX_SIZE = 2 ** 20
app.config.WEBSOCKET_MAX_QUEUE = 32
app.config.WEBSOCKET_READ_LIMIT = 2 ** 16
app.config.WEBSOCKET_WRITE_LIMIT = 2 ** 16
Find more in Configuration
section.