How to run an aiohttp server in a thread?

Question

This example of aiohttp server in a thread fails with an RuntimeError: There is no current event loop in thread \'Thread-1\'. error:

import thre         


        

Answer 1

We must use app.make_handler handler in main thread, example:

import asyncio
import threading
from aiohttp import web

loop = asyncio.get_event_loop()


def say_hello(request):
    return web.Response(text='Hello, world')


app = web.Application(debug=True)
app.add_routes([web.get('/', say_hello)])

handler = app.make_handler()
server = loop.create_server(handler, host='127.0.0.1', port=8080)


def aiohttp_server():
    loop.run_until_complete(server)
    loop.run_forever()


t = threading.Thread(target=aiohttp_server)
t.start()