Simple async HTTP server to emulate long request processing

delayserver.py

import sys
from asyncio import coroutine, sleep
from aiohttp import web

@coroutine
def handle(request):
    seconds = float(request.match_info.get('seconds', 1))
    yield from sleep(seconds)
    text = "You've been waiting for {} seconds".format(seconds)
    return web.Response(body=text.encode('utf-8'))

app = web.Application()
app.router.add_route('GET', '/delay/{seconds}', handle)

web.run_app(app, port=int(sys.argv[1]))