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================================== Async http client/server framework ================================== .. image:: https://raw.githubusercontent.com/aio-libs/aiohttp/master/docs/_static/aiohttp-icon-128x128.png :height: 64px :width: 64px :alt: aiohttp logo | .. image:: https://github.com/aio-libs/aiohttp/workflows/CI/badge.svg :target: https://github.com/aio-libs/aiohttp/actions?query=workflow%3ACI :alt: GitHub Actions status for master branch .. image:: https://codecov.io/gh/aio-libs/aiohttp/branch/master/graph/badge.svg :target: https://codecov.io/gh/aio-libs/aiohttp :alt: codecov.io status for master branch .. image:: https://badge.fury.io/py/aiohttp.svg :target: https://pypi.org/project/aiohttp :alt: Latest PyPI package version .. image:: https://readthedocs.org/projects/aiohttp/badge/?version=latest :target: https://docs.aiohttp.org/ :alt: Latest Read The Docs .. image:: https://img.shields.io/discourse/status?server=https%3A%2F%2Faio-libs.discourse.group :target: https://aio-libs.discourse.group :alt: Discourse status .. image:: https://badges.gitter.im/Join%20Chat.svg :target: https://gitter.im/aio-libs/Lobby :alt: Chat on Gitter Key Features ============ - Supports both client and server side of HTTP protocol. - Supports both client and server Web-Sockets out-of-the-box and avoids Callback Hell. - Provides Web-server with middlewares and plugable routing. Getting started =============== Client ------ To get something from the web: .. code-block:: python import aiohttp import asyncio async def main(): async with aiohttp.ClientSession() as session: async with session.get('http://python.org') as response: print("Status:", response.status) print("Content-type:", response.headers['content-type']) html = await response.text() print("Body:", html[:15], "...") loop = asyncio.get_event_loop() loop.run_until_complete(main()) This prints: .. code-block:: Status: 200 Content-type: text/html; charset=utf-8 Body: <!doctype html> ... Coming from `requests <https://requests.readthedocs.io/>`_ ? Read `why we need so many lines <https://aiohttp.readthedocs.io/en/latest/http_request_lifecycle.html>`_. Server ------ An example using a simple server: .. code-block:: python # examples/server_simple.py from aiohttp import web async def handle(request): name = request.match_info.get('name', "Anonymous") text = "Hello, " + name return web.Response(text=text) async def wshandle(request): ws = web.WebSocketResponse() await ws.prepare(request) async for msg in ws: if msg.type == web.WSMsgType.text: await ws.send_str("Hello, {}".format(msg.data)) elif msg.type == web.WSMsgType.binary: await ws.send_bytes(msg.data) elif msg.type == web.WSMsgType.close: break return ws app = web.Application() app.add_routes([web.get('/', handle), web.get('/echo', wshandle), web.get('/{name}', handle)]) if __name__ == '__main__': web.run_app(app) Documentation ============= https://aiohttp.readthedocs.io/ Demos ===== https://github.com/aio-libs/aiohttp-demos External links ============== * `Third party libraries <http://aiohttp.readthedocs.io/en/latest/third_party.html>`_ * `Built with aiohttp <http://aiohttp.readthedocs.io/en/latest/built_with.html>`_ * `Powered by aiohttp <http://aiohttp.readthedocs.io/en/latest/powered_by.html>`_ Feel free to make a Pull Request for adding your link to these pages! Communication channels ====================== *aio-libs discourse group*: https://aio-libs.discourse.group *gitter chat* https://gitter.im/aio-libs/Lobby We support `Stack Overflow <https://stackoverflow.com/questions/tagged/aiohttp>`_. Please add *aiohttp* tag to your question there. Requirements ============ - Python >= 3.6 - async-timeout_ - attrs_ - chardet_ - multidict_ - yarl_ Optionally you may install the cChardet_ and aiodns_ libraries (highly recommended for sake of speed). .. _chardet: https://pypi.python.org/pypi/chardet .. _aiodns: https://pypi.python.org/pypi/aiodns .. _attrs: https://github.com/python-attrs/attrs .. _multidict: https://pypi.python.org/pypi/multidict .. _yarl: https://pypi.python.org/pypi/yarl .. _async-timeout: https://pypi.python.org/pypi/async_timeout .. _cChardet: https://pypi.python.org/pypi/cchardet License ======= ``aiohttp`` is offered under the Apache 2 license. Keepsafe ======== The aiohttp community would like to thank Keepsafe (https://www.getkeepsafe.com) for its support in the early days of the project. Source code =========== The latest developer version is available in a GitHub repository: https://github.com/aio-libs/aiohttp Benchmarks ========== If you are interested in efficiency, the AsyncIO community maintains a list of benchmarks on the official wiki: https://github.com/python/asyncio/wiki/Benchmarks