aiohttp 的初始化函式init()也是一個coroutine，loop.create_server()則利用asyncio建立TCP服務

安裝 aiohttp

安裝命令: pip install aiohttp

D:\PythonProject\sustudy>pip install aiohttp
Collecting aiohttp
  Downloading aiohttp-2.3.6-cp36-cp36m-win_amd64.whl (370kB)
    100% |████████████████████████████████| 378kB 701kB/s
Collecting yarl>=
 
0.11 (from aiohttp)
  Downloading yarl-0.16.0-cp36-cp36m-win_amd64.whl (85kB)
    100% |████████████████████████████████| 92kB 383kB/s
Collecting multidict>=3.0.0 (from aiohttp)
  Downloading multidict-3.3.2-cp36-cp36m-win_amd64.whl (185kB)
    100% |████████████████████████████████| 194kB 175kB/s
Collecting async-timeout
 
>=1.2.0 (from aiohttp)
  Downloading async_timeout-2.0.0-py3-none-any.whl
Requirement already satisfied: chardet in c:\programdata\anaconda3\lib\site-packages (from aiohttp)
Installing collected packages: multidict, yarl, async-timeout, aiohttp
Successfully installed aiohttp-2.3.6 async-timeout-2.0.0 multidict-
 
3.3.2 yarl-0.16.0

執行示例

# main.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Python基礎-Web 服務端 aiohttp
import asyncio
from aiohttp import web

async def index(request):
    await asyncio.sleep(0.5)
    return web.Response(body = b'<h1>Index</h1>')

async def hello(request):
    await asyncio.sleep(0.5)
    text = '<h1>hello, %s!</h1>' % request.match_info['name']
    return web.Response(body=text.encode('utf-8'))

async def init(loop):
    app = web.Application(loop = loop)
    app.router.add_route('GET', '/', index)
    app.router.add_route('GET', '/hello/{name}', hello)
    srv = await loop.create_server(app.make_handler(), '127.0.0.1', 8000)
    print('Server started at http://127.0.0.1:8000...')

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

執行結果

<h1>hello, 王大錘!</h1>