aiohttp 0.22.1

http client/server for asyncio

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

https://aiohttp.readthedocs.io/

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

0.22.1 (08-16-2016)

• Large cookie expiration/max-age doesn’t break an event loop from now (fixes #967)

0.22.0 (08-15-2016)

• 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