asyncio学习（1）

来源：互联网发布：淘宝刷単平台编辑：程序博客网时间：2024/06/05 04:34

官方教程：
【1】https://compiletoi.net/fast-scraping-in-python-with-asyncio/
【2】https://docs.python.org/3.4/library/asyncio.html
【3】http://aiohttp.readthedocs.io/en/stable/

我用的python版本是 3.5.2 ，官方给出的 body=yield from response.read_and_close() 方法不可行，然后我拆分成下面的代码，以后会继续学习异步

import asyncioimport aiohttp@asyncio.coroutinedef wget(host):    print ('wget %s' %host)    connect=asyncio.open_connection(host,80)    reader,writer=yield from connect    header='GET / HTTP/1.0\r\nHost: %s\r\n\r\n' % host    writer.write(header.encode('utf-8'))    yield from writer.drain()    while True:        line=yield  from reader.readline()        if line ==b'\r\n':            break        print ('%s header > %s' %(host,line.decode('utf-8').rstrip()))        writer.close()@asyncio.coroutinedef print_page(url):    response=yield from aiohttp.request('GET',url)    body=yield from response.read()    response.close()    print (body)#loop=asyncio.get_event_loop()#tasks=[wget(host) for host in ['mail.163.com','www.sina.com.cn','www.sohu.com']]#loop.run_until_complete(asyncio.wait(tasks))loop=asyncio.get_event_loop()loop.run_until_complete(asyncio.wait([print_page('http://tieba.baidu.com/i/357696678/concern'),print_page('http://www.baidu.com')]))loop.close()

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