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

It's possible to use web.run_app, just create a new event loop (and set handle_signals=False to avoid RuntimeError: set_wakeup_fd only works in main thread):

import threading
import asyncio
from aiohttp import web

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

    asyncio.set_event_loop(asyncio.new_event_loop())  # create a new event loop here
    app = web.Application(debug=True)
    app.add_routes([web.get('/', say_hello)])
    web.run_app(app, handle_signals=False)