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http client/server for asyncio

Project description

http client/server for asyncio

aiohttp logo https://secure.travis-ci.org/KeepSafe/aiohttp.png

Requirements

License

aiohttp is offered under the Apache 2 license.

Getting started

Client

To retrieve something from the web:

import aiohttp

def get_body(url):
    response = yield from aiohttp.request('GET', url)
    return (yield from response.read())

You can use the get command like this anywhere in your asyncio powered program:

response = yield from aiohttp.request('GET', 'http://python.org')
body = yield from response.read()
print(body)

If you want to use timeouts for aiohttp client side please use standard asyncio approach:

yield from asyncio.wait_for(request('GET', url), 10)

Server

In aiohttp 0.12 we’ve added highlevel API for web HTTP server.

There is simple usage example:

import asyncio
from aiohttp import web


@asyncio.coroutine
def handle(request):
    name = request.match_info.get('name', "Anonymous")
    text = "Hello, " + name
    return web.Response(body=text.encode('utf-8'))


@asyncio.coroutine
def init(loop):
    app = web.Application(loop=loop)
    app.router.add_route('GET', '/{name}', handle)

    srv = yield from loop.create_server(app.make_handler(),
                                        '127.0.0.1', 8080)
    print("Server started at http://127.0.0.1:8080")
    return srv

loop = asyncio.get_event_loop()
loop.run_until_complete(init(loop))
loop.run_forever()

CHANGES

0.14.0 (Unreleased)

  • HttpMessage._add_default_headers does not overwrite existing headers #216
  • Expose multidict classes at package level
  • add aiohttp.web.WebSocketResponse
  • According to RFC 6455 websocket subprotocol preference order is provided by client, not by server
  • websocket’s ping and pong accept optional message parameter
  • multidict views do not accept getall parameter anymore, it returns the full body anyway.
  • multidicts have optional Cython optimization, cythonized version of multidicts is about 5 times faster than pure Python.
  • multidict.getall() returns list, not tuple.
  • Backward imcompatible change: now there are two mutable multidicts (MultiDict, CIMultiDict) and two immutable multidict proxies (MultiDictProxy and CIMultiDictProxy). Previous edition of multidicts was not a part of public API BTW.
  • Router refactoring to push Not Allowed and Not Found in middleware processing
  • Convert ConnectionError to aiohttp.DisconnectedError and don’t eat ConnectionError exceptions from web handlers.
  • Remove hop headers from Response class, wsgi response still uses hop headers.
  • Allow to send raw chunked encoded response.
  • Allow to encode output bytes stream into chunked encoding.
  • Allow to compress output bytes stream with deflate encoding.
  • Server has 75 seconds keepalive timeout now, was non-keepalive by default.
  • Application doesn’t accept **kwargs anymore (#243).
  • Request is inherited from dict now for making per-request storage to middlewares (#242).

0.13.1 (12-31-2014)

  • Add aiohttp.web.StreamResponse.started property #213
  • Html escape traceback text in ServerHttpProtocol.handle_error
  • Mention handler and middlewares in aiohttp.web.RequestHandler.handle_request on error (#218)

0.13.0 (12-29-2014)

  • StreamResponse.charset converts value to lower-case on assigning.
  • Chain exceptions when raise ClientRequestError.
  • Support custom regexps in route variables #204
  • Fixed graceful shutdown, disable keep-alive on connection closing.
  • Decode http message with utf-8 encoding, some servers send headers in utf-8 encoding #207
  • Support aiohtt.web middlewares #209
  • Add ssl_context to TCPConnector #206

0.12.0 (12-12-2014)

  • Deep refactoring of aiohttp.web in backward-incompatible manner. Sorry, we have to do this.
  • Automatically force aiohttp.web handlers to coroutines in UrlDispatcher.add_route() #186
  • Rename Request.POST() function to Request.post()
  • Added POST attribute
  • Response processing refactoring: constructor does’t accept Request instance anymore.
  • Pass application instance to finish callback
  • Exceptions refactoring
  • Do not unquote query string in aiohttp.web.Request
  • Fix concurrent access to payload in RequestHandle.handle_request()
  • Add access logging to aiohttp.web
  • Gunicorn worker for aiohttp.web
  • Removed deprecated AsyncGunicornWorker
  • Removed deprecated HttpClient

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