Python3实现并发检验代理池地址的方法_Python

Python3实现并发检验代理池地址的方法

2020-09-08 09:48RQSLT Python

这篇文章主要介绍了Python3实现并发检验代理池地址的方法,实例分析了Python3基于线程的代理检验操作相关技巧,需要的朋友可以参考下

本文实例讲述了Python3实现并发检验代理池地址的方法。分享给大家供大家参考，具体如下：

									#encoding=utf-8

									#author: walker

									#date: 2016-04-14

									#summary: 用协程/线程池并发检验代理有效性

									import os, sys, time

									import requests

									from concurrent import futures

									cur_dir_fullpath = os.path.dirname(os.path.abspath(__file__))

									Headers = {

									      'Accept': '*/*',

									      'User-Agent': 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E)',

									    }

									#检验单个代理的有效性

									#如果有效，返回该proxy；否则，返回空字符串

									def Check(desturl, proxy, feature):

									  proxies = {'http': 'http://' + proxy}

									  r = None #声明

									  exMsg = None

									  try:

									    r = requests.get(url=desturl, headers=Headers, proxies=proxies, timeout=3)

									  except:

									    exMsg = '* ' + traceback.format_exc()

									    #print(exMsg)

									  finally:

									    if 'r' in locals() and r:

									      r.close()

									  if exMsg:

									    return ''

									  if r.status_code != 200:

									    return ''

									  if r.text.find(feature) < 0:

									    return ''

									  return proxy

									#输入代理列表(set/list)，返回有效代理列表

									def GetValidProxyPool(rawProxyPool, desturl, feature):

									  validProxyList = list()  #有效代理列表

									  pool = futures.ThreadPoolExecutor(8)

									  futureList = list()

									  for proxy in rawProxyPool:

									    futureList.append(pool.submit(Check, desturl, proxy, feature))

									  print('\n submit done, waiting for responses\n')

									  for future in futures.as_completed(futureList):

									    proxy = future.result()

									    print('proxy:' + proxy)

									    if proxy: #有效代理

									      validProxyList.append(proxy)

									  print('validProxyList size:' + str(len(validProxyList)))

									  return validProxyList

									#获取原始代理池

									def GetRawProxyPool():

									  rawProxyPool = set()

									  #通过某种方式获取原始代理池......

									  return rawProxyPool

									if __name__ == "__main__":

									  rawProxyPool = GetRawProxyPool()

									  desturl = 'http://...'    #需要通过代理访问的目标地址

									  feature = 'xxx'    #目标网页的特征码

									  validProxyPool = GetValidProxyPool(rawProxyPool, desturl, feature)