WebSocket

Flask-aiohttp injects WebSocketResponse into your WSGI environ, and provides api to use it.

This is not elegant solution for using websocket. But, it would be best solution for now.

from flask.ext.aiohttp import websocket


@app.route('/echo')
@websocket
def echo():
    while True:
        msg = yield from aio.ws.receive_msg()

        if msg.tp == aiohttp.MsgType.text:
            aio.ws.send_str(msg.data)
        elif msg.tp == aiohttp.MsgType.close:
            print('websocket connection closed')
            break
        elif msg.tp == aiohttp.MsgType.error:
            print('ws connection closed with exception %s',
                  aio.ws.exception())
            break

You also can use most features of flask with websocket.

from flask.ext.aiohttp import websocket


@app.route('/hello/<name>')
@websocket
def hello(name):
    while True:
        msg = yield from aio.ws.receive_msg()

        if msg.tp == aiohttp.MsgType.text:
            aio.ws.send_str('Hello, {}'.format(name))
        elif msg.tp == aiohttp.MsgType.close:
            print('websocket connection closed')
            break
        elif msg.tp == aiohttp.MsgType.error:
            print('ws connection closed with exception %s',
                  aio.ws.exception())
            break