#使用多线程：在协程中集成阻塞io

import asyncio

from concurrent.futures import ThreadPoolExecutor

import socket

from urllib.parse import urlparse

def get_url(url):

    #通过socket请求html

    url = urlparse(url)

    host = url.netloc

    path = url.path

    if path == "":

        path = "/"

    #建立socket连接

    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    # client.setblocking(False)

    client.connect((host, 80)) #阻塞不会消耗cpu

    #不停的询问连接是否建立好， 需要while循环不停的去检查状态

    #做计算任务或者再次发起其他的连接请求

    client.send("GET {} HTTP/1.1\r\nHost:{}\r\nConnection:close\r\n\r\n".format(path, host).encode("utf8"))

    data = b""

    while True:

        d = client.recv(1024)

        if d:

            data += d

        else:

            break

    data = data.decode("utf8")

    html_data = data.split("\r\n\r\n")[1]

    print(html_data)

    client.close()

if __name__ == "__main__":

    import time

    start_time = time.time()

    loop = asyncio.get_event_loop()

    executor = ThreadPoolExecutor(3)

    tasks = []

    for url in range(20):

        url = "http://shop.projectsedu.com/goods/{}/".format(url)

        task = loop.run_in_executor(executor, get_url, url)

        tasks.append(task)

    loop.run_until_complete(asyncio.wait(tasks))

    print("last time:{}".format(time.time()-start_time))