如何启用请求异步模式? [英] how enable requests async mode?

问题描述

对于此代码:

import sys

import gevent
from gevent import monkey

monkey.patch_all()

import requests
import urllib2

def worker(url, use_urllib2=False):
    if use_urllib2:
        content = urllib2.urlopen(url).read().lower()
    else:
        content = requests.get(url, prefetch=True).content.lower()
    title = content.split('<title>')[1].split('</title>')[0].strip()

urls = ['http://www.mail.ru']*5

def by_requests():
    jobs = [gevent.spawn(worker, url) for url in urls]
    gevent.joinall(jobs)

def by_urllib2():
    jobs = [gevent.spawn(worker, url, True) for url in urls]
    gevent.joinall(jobs)

if __name__=='__main__':
    from timeit import Timer
    t = Timer(stmt="by_requests()", setup="from __main__ import by_requests")  
    print 'by requests: %s seconds'%t.timeit(number=3)
    t = Timer(stmt="by_urllib2()", setup="from __main__ import by_urllib2")  
    print 'by urllib2: %s seconds'%t.timeit(number=3)
    sys.exit(0)

这个结果:

by requests: 18.3397213892 seconds
by urllib2: 2.48605842363 seconds

在嗅探器中看起来是这样的:

in sniffer it looks this:

描述:前 5 个请求由 requests 库发送，接下来的 5 个请求由 urllib2 库发送.红色 - 工作冻结的时间，黑暗 - 接收数据时......wtf?！

description: first 5 requests are sended by requests library, next 5 requests are sended by urllib2 library. red - is time when work was freeze, dark - when data receiving... wtf?!

如果套接字库打补丁并且库必须相同地工作怎么可能?如何使用没有 requests.async 的请求进行异步工作?

推荐答案

抱歉 Kenneth Reitz.他的图书馆很棒.

Sorry Kenneth Reitz. His library is wonderful.

我很笨.我需要像这样为 httplib 选择猴子补丁:

I am stupid. I need select monkey patch for httplib like this:

gevent.monkey.patch_all(httplib=True)

因为 httplib 的补丁默认是禁用的.

Because patch for httplib is disabled by default.

这篇关于如何启用请求异步模式?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！