#! /usr/bin/env python3

# -*- coding:utf- -*-

from urllib import request

import gevent,time

from gevent import monkey

monkey.patch_all()    # 把当前程序中的所有io操作都做上标记

def spider(url):

    print("GET:%s" % url)

    resp = request.urlopen(url)

    data = resp.read()

    print("%s bytes received from %s.." % (len(data), url))

urls = [

    "https://weibo.com/",

    "https://www.baidu.com/",

    "https://www.yinxiang.com/"

]

start_time = time.time()

for url in urls:

    spider(url)

print("同步耗时：",time.time() - start_time)

async_time_start = time.time()

gevent.joinall([

    gevent.spawn(spider,"https://weibo.com/"),

    gevent.spawn(spider,"https://www.baidu.com/"),

    gevent.spawn(spider,"https://www.yinxiang.com/"),

])

print("异步耗时：",time.time() - async_time_start)

GET:https://weibo.com/

 bytes received from https://weibo.com/..

GET:https://www.baidu.com/

 bytes received from https://www.baidu.com/..

GET:https://www.yinxiang.com/

 bytes received from https://www.yinxiang.com/..

同步耗时： 0.23460006713867188

GET:https://weibo.com/

GET:https://www.baidu.com/

GET:https://www.yinxiang.com/

 bytes received from https://www.baidu.com/..

 bytes received from https://www.yinxiang.com/..

 bytes received from https://weibo.com/..

异步耗时： 0.0946660041809082