http client/server for asyncio
Project description
http client/server for asyncio
Features
- Supports both client and server side of HTTP protocol.
- Supports both client and server Web-Sockets out-of-the-box.
- Web-server has middlewares and pluggable routing.
Getting started
Client
To retrieve something from the web:
import aiohttp import asyncio async def fetch(session, url): with aiohttp.Timeout(10): async with session.get(url) as response: return await response.text() if __name__ == '__main__': loop = asyncio.get_event_loop() with aiohttp.ClientSession(loop=loop) as session: html = loop.run_until_complete( fetch(session, 'http://python.org')) print(html)
Server
This is simple usage example:
from aiohttp import web async def handle(request): name = request.match_info.get('name', "Anonymous") text = "Hello, " + name return web.Response(body=text.encode('utf-8')) async def wshandler(request): ws = web.WebSocketResponse() await ws.prepare(request) async for msg in ws: if msg.tp == web.MsgType.text: ws.send_str("Hello, {}".format(msg.data)) elif msg.tp == web.MsgType.binary: ws.send_bytes(msg.data) elif msg.tp == web.MsgType.close: break return ws app = web.Application() app.router.add_route('GET', '/echo', wshandler) app.router.add_route('GET', '/{name}', handle) web.run_app(app)
Note: examples are written for Python 3.5+ and utilize PEP-492 aka async/await. If you are using Python 3.4 please replace await with yield from and async def with @coroutine e.g.:
async def coro(...): ret = await f()
shoud be replaced by:
@asyncio.coroutine def coro(...): ret = yield from f()
Documentation
Discussion list
aio-libs google group: https://groups.google.com/forum/#!forum/aio-libs
Requirements
- Python >= 3.4.1
- chardet https://pypi.python.org/pypi/chardet
Optionally you may install cChardet library: https://pypi.python.org/pypi/cchardet/1.0.0
License
aiohttp is offered under the Apache 2 license.
Source code
The latest developer version is available in a github repository: https://github.com/KeepSafe/aiohttp
Benchmarks
If you are interested in by efficiency, AsyncIO community maintains a list of benchmarks on the official wiki: https://github.com/python/asyncio/wiki/Benchmarks
CHANGES
0.22.2 (07-23-2016)
- Suppress CancelledError when Timeout raises TimeoutError #970
- Don’t expose aiohttp.__version__
- Add unsafe parameter to CookieJar #968
- Use unsafe cookie jar in test client tools
- Expose aiohttp.CookieJar name
0.22.1 (07-16-2016)
- Large cookie expiration/max-age doesn’t break an event loop from now (fixes #967)
0.22.0 (07-15-2016)
- Fix bug in serving static directory #803
- Fix command line arg parsing #797
- Fix a documentation chapter about cookie usage #790
- Handle empty body with gzipped encoding #758
- Support 451 Unavailable For Legal Reasons http status #697
- Fix Cookie share example and few small typos in docs #817
- UrlDispatcher.add_route with partial coroutine handler #814
- Optional support for aiodns #728
- Add ServiceRestart and TryAgainLater websocket close codes #828
- Fix prompt message for web.run_app #832
- Allow to pass None as a timeout value to disable timeout logic #834
- Fix leak of connection slot during connection erro #835
- Gunicorn worker with uvloop support aiohttp.worker.GunicornUVLoopWebWorker #878
- Don’t send body in response to HEAD request #838
- Skip the preamble in MultipartReader #881
- Implement BasicAuth decode classmethod. #744
- Don’t crash logger when transport is None #889
- Use a create_future compatibility wrapper instead of creating Futures directly #896
- Add test utilities to aiohttp #902
- Improve Request.__repr__ #875
- Skip DNS resolving if provided host is already an ip address #874
- Add headers to ClientSession.ws_connect #785
- Document that server can send pre-compressed data #906
- Don’t add Content-Encoding and Transfer-Encoding if no body #891
- Add json() convenience methods to websocket message objects #897
- Add client_resp.raise_for_status() #908
- Implement cookie filter #799
- Include an example of middleware to handle error pages #909
- Fix error handling in StaticFileMixin #856
- Add mocked request helper #900
- Fix empty ALLOW Response header for cls based View #929
- Respect CONNECT method to implement a proxy server #847
- Add pytest_plugin #914
- Add tutorial
- Add backlog option to support more than 128 (default value in “create_server” function) concurrent connections #892
- Allow configuration of header size limits #912
- Separate sending file logic from StaticRoute dispatcher #901
- Drop deprecated share_cookies connector option (BACKWARD INCOMPATIBLE)
- Drop deprecated support for tuple as auth paramter. Use aiohttp.BasicAuth instead (BACKWARD INCOMPATIBLE)
- Remove deprecated request.payload property, use content instead. (BACKWARD INCOMPATIBLE)
- Drop all mentions about api changes in documentaion for versions older than 0.16
- Allow to override default cookie jar #963
- Add manylinux wheel builds
- Dup a socket for sendfile usage #964
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