WebCamp 2016: Python. Михаил Бегерский: Использование asyncio-стека...
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Transcript of WebCamp 2016: Python. Михаил Бегерский: Использование asyncio-стека...
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About
Python developer @ DataRobot
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Benchmark [1]
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Benchmark
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Database drivers
● aiocouchdb● aiomysql● aioredis● aiozmq● aioes● aiopg● aiokafka● aioodbc● aiomcache
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SQLAlchemy
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Faster postgre client?
$ pip install asyncpg
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Mongo? [2]
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aiohttp_jinja2
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aiohttp_debugtoolbar
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aiohttp_debugtoolbar
$ pip install aiohttp_debugtoolbar
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aiohttp_debugtoolbar
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aiohttp_debugtoolbar
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aiohttp_debugtoolbar
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aiohttp_session
● SimpleCookieStorage
● EncryptedCookieStorage
● RedisStorage
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aiohttp_session
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aiohttp_security
● AbstractIdentityPolicy
● AbstractAuthorizationPolicy
● remember()
● forget()
● authorized_userid()
● permits()
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aiohttp_security
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aiohttp_security
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Slowloris
$ nmap --script http-slowloris-check 127.0.0.1 -p 8080
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Web-sockets [3]
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Middleware
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Middleware
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aiohttp client [4]
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aiohttp_admin
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aiohttp_admin
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Other tools [5]
● aiohttp_runserver
● aiohttp_cors
● aiohttp_traversal
● aiothrottle
● aiohttp_mako
● and more ...
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Project structure
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Debug
$ export PYTHONASYNCIODEBUG=1
● explicit loop
● releasing resources
● awaititng coroutines
$ python script.py -Wdefault
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Debug
$ Task was destroyed but it is pending!task: <Task pending coro=<fetch_bad() running at demo.py:14> wait_for=<Future pending cb=[Task._wakeup(), BaseSelectorEventLoop._sock_connect_done(10)()]>>
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Debug
$ ConnectionResetError: [Errno 54] Connect call failed ('127.0.0.1', 8080)
$ OSError: [Errno 24] Too many open files
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Debug
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Testing
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Testing
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Testing [6]
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Go production!
$ gunicorn app_module:app --bind localhost:8080 --worker-class aiohttp.worker.GunicornWebWorker
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Graceful shutdown
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Production architecture 38
Resources
1. klen.github.io/py-frameworks-bench/
2. emptysqua.re/blog/
3. igordavydenko.com/talks/lvivpy-5/
4. pawelmhm.github.io/asyncio/python/aiohttp/2016/04/22/asyncio-aiohttp.html
5. github.com/python/asyncio/wiki/ThirdParty
6. asvetlov.github.io/pytest-slides/
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Thanks for your attention
https://github.com/kpidata/webcamp16
@bmwant
bmwlog.pp.ua
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Let’s have some fun!
my-mail [ at ] gmail [ dot ] com
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