eduardompinto · October 5, 2016 18:15
diff --git a/big.html b/big.html
 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
 <html><head>
 </head><body>
 The Project Gutenberg EBook of The Adventures of Sherlock Holmes
 by Sir Arthur Conan Doyle
 (#15 in our series by Sir Arthur Conan Doyle)

 Copyright laws are changing all over the world. Be sure to check the
 copyright laws for your country before downloading or redistributing
 this or any other Project Gutenberg eBook.

 This header should be the first thing seen when viewing this Project
 Gutenberg file.  Please do not remove it.  Do not change or edit the
 header without written permission.

 Please read the "legal small print," and other information about the
 eBook and Project Gutenberg at the bottom of this file.  Included is
 important information about your specific rights and restrictions in
 how the file may be used.  You can also find out about how to make a
 donation to Project Gutenberg, and how to get involved.


 **Welcome To The World of Free Plain Vanilla Electronic Texts**

 **eBooks Readable By Both Humans and By Computers, Since 1971**

 *****These eBooks Were Prepared By Thousands of Volunteers!*****


 Title: The Adventures of Sherlock Holmes

 Author: Sir Arthur Conan Doyle

 Release Date: March, 1999  [EBook #1661]
 [Most recently updated: November 29, 2002]

 Edition: 12

 Language: English

 Character set encoding: ASCII

 *** START OF THE PROJECT GUTENBERG EBOOK, THE ADVENTURES OF SHERLOCK HOLMES ***




 (Additional editing by Jose Menendez)
 </body></html>
diff --git a/client.py b/client.py
 import asyncio
 from aiohttp import ClientSession

 async def fetch(url):
    async with ClientSession() as session:
        async with session.get(url) as resp:
            return url, resp.status

 async def fetch_urls(urls):
    futures = [fetch(url) for url in urls]
    yield await asyncio.gather(*futures)

 async def run():
    url = 'http://localhost:8080/{}'
    urls = [url.format(i) for i in range(100)]
    async for result in fetch_urls(urls):
        print(result)

 loop = asyncio.get_event_loop()
 try:
    loop.run_until_complete(run())
 finally:
    loop.close()
diff --git a/requirements.txt b/requirements.txt
 aiohttp
diff --git a/server.py b/server.py
 # stoled from https://pawelmhm.github.io/asyncio/python/aiohttp/2016/04/22/asyncio-aiohttp.html

 import asyncio
 from datetime import datetime
 from aiohttp import web
 import random

 # set seed to ensure async and sync client get same distribution of delay values
 # and tests are fair
 random.seed(1)

 async def hello(request):
    name = request.match_info.get("name", "foo")
    n = datetime.now().isoformat()
    delay = random.randint(0, 3)
    await asyncio.sleep(delay)
    headers = {"content_type": "text/html", "delay": str(delay)}
    # opening file is not async here, so it may block, to improve
    # efficiency of this you can consider using asyncio Executors
    # that will delegate file operation to separate thread or process
    # and improve performance
    # https://docs.python.org/3/library/asyncio-eventloop.html#executor
    # https://pymotw.com/3/asyncio/executors.html
    with open("big.html", "rb") as html_body:
        print("{}: {} delay: {}".format(n, request.path, delay))
        response = web.Response(body=html_body.read(), headers=headers)
    return response

 app = web.Application()
 app.router.add_route("GET", "/{name}", hello)
 web.run_app(app)
	<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
	<html><head>
	</head><body>
	The Project Gutenberg EBook of The Adventures of Sherlock Holmes
	by Sir Arthur Conan Doyle
	(#15 in our series by Sir Arthur Conan Doyle)

	Copyright laws are changing all over the world. Be sure to check the
	copyright laws for your country before downloading or redistributing
	this or any other Project Gutenberg eBook.

	This header should be the first thing seen when viewing this Project
	Gutenberg file. Please do not remove it. Do not change or edit the
	header without written permission.

	Please read the "legal small print," and other information about the
	eBook and Project Gutenberg at the bottom of this file. Included is
	important information about your specific rights and restrictions in
	how the file may be used. You can also find out about how to make a
	donation to Project Gutenberg, and how to get involved.


	Welcome To The World of Free Plain Vanilla Electronic Texts

	eBooks Readable By Both Humans and By Computers, Since 1971

	***These eBooks Were Prepared By Thousands of Volunteers!***


	Title: The Adventures of Sherlock Holmes

	Author: Sir Arthur Conan Doyle

	Release Date: March, 1999 [EBook #1661]
	[Most recently updated: November 29, 2002]

	Edition: 12

	Language: English

	Character set encoding: ASCII

	* START OF THE PROJECT GUTENBERG EBOOK, THE ADVENTURES OF SHERLOCK HOLMES *




	(Additional editing by Jose Menendez)
	</body></html>
	import asyncio
	from aiohttp import ClientSession

	async def fetch(url):
	async with ClientSession() as session:
	async with session.get(url) as resp:
	return url, resp.status

	async def fetch_urls(urls):
	futures = [fetch(url) for url in urls]
	yield await asyncio.gather(*futures)

	async def run():
	url = 'http://localhost:8080/{}'
	urls = [url.format(i) for i in range(100)]
	async for result in fetch_urls(urls):
	print(result)

	loop = asyncio.get_event_loop()
	try:
	loop.run_until_complete(run())
	finally:
	loop.close()
	# stoled from https://pawelmhm.github.io/asyncio/python/aiohttp/2016/04/22/asyncio-aiohttp.html

	import asyncio
	from datetime import datetime
	from aiohttp import web
	import random

	# set seed to ensure async and sync client get same distribution of delay values
	# and tests are fair
	random.seed(1)

	async def hello(request):
	name = request.match_info.get("name", "foo")
	n = datetime.now().isoformat()
	delay = random.randint(0, 3)
	await asyncio.sleep(delay)
	headers = {"content_type": "text/html", "delay": str(delay)}
	# opening file is not async here, so it may block, to improve
	# efficiency of this you can consider using asyncio Executors
	# that will delegate file operation to separate thread or process
	# and improve performance
	# https://docs.python.org/3/library/asyncio-eventloop.html#executor
	# https://pymotw.com/3/asyncio/executors.html
	with open("big.html", "rb") as html_body:
	print("{}: {} delay: {}".format(n, request.path, delay))
	response = web.Response(body=html_body.read(), headers=headers)
	return response

	app = web.Application()
	app.router.add_route("GET", "/{name}", hello)
	web.run_app(app)