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Async http client/server framework
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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 >= 3.7
- async-timeout_
- charset-normalizer_
- multidict_
- yarl_
Optionally you may install the cChardet_ and aiodns_ libraries (highly
recommended for sake of speed).
.. _charset-normalizer: https://pypi.org/project/charset-normalizer
.. _aiodns: https://pypi.python.org/pypi/aiodns
.. _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
