- 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.
- Python >= 3.3
- asyncio https://pypi.python.org/pypi/asyncio
aiohttp is offered under the Apache 2 license.
http://aiohttp.readthedocs.org/
The latest developer version is available in a github repository: https://github.com/KeepSafe/aiohttp
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
To retrieve something from the web:
import aiohttp
import asyncio
async def get_body(client, url):
async with client.get(url) as response:
return await response.read()
if __name__ == '__main__':
loop = asyncio.get_event_loop()
client = aiohttp.ClientSession(loop=loop)
raw_html = loop.run_until_complete(get_body(client, 'http://python.org'))
print(raw_html)
client.close()If you want to use timeouts for aiohttp client please use standard asyncio approach:
yield from asyncio.wait_for(client.get(url), 10)This is simple usage example:
import asyncio
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()
ws.start(request)
while True:
msg = await ws.receive()
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
async def init(loop):
app = web.Application(loop=loop)
app.router.add_route('GET', '/echo', wshandler)
app.router.add_route('GET', '/{name}', handle)
srv = await 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()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()
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