import aiohttp

import aiofiles

import asyncio

import os

from timeit import default_timer as timer

async def download_html(session, url):

async with session.get(url, ssl=False) as res:

filename = "output/%s.html" % os.path.basename(url)

async with aiofiles.open(filename, "wb") as f:

while True:

chunk = await res.content.read(1024)

if not chunk:

break

await f.write(chunk)

return await res.release()

async def main(url):

async with aiohttp.ClientSession() as session:

await download_html(session, url)

urls = [

"http://packtpub.com",

"http://python.org",

"http://docs.python.org/3/library/asyncio",

"http://aiohttp.readthedocs.io",

"http://google.com",

]

start = timer()

loop = asyncio.get_event_loop()

loop.run_until_complete(asyncio.gather(*(main(url) for url in urls)))

print("Took %.2f seconds." % (timer() - start))