经常写爬虫,难免会遇到ip被目标网站屏蔽的情况,银次一个ip肯定不够用,作为节约的程序猿,能不花钱就不花钱,那就自己去找吧,这次就写了下抓取 西刺代理上的ip,但是这个网站也反爬!!!
至于如何应对,我觉得可以通过增加延时试试,可能是我抓取的太频繁了,所以被封IP了。
但是,还是可以去IP巴士试试的,条条大路通罗马嘛,不能吊死在一棵树上。
不废话,上代码。
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#!/usr/bin/env python # -*- coding:utf8 -*- import urllib2 import time from bs4 import BeautifulSoup import sys reload(sys) sys.setdefaultencoding( "utf-8" ) req_header = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11', 'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', #'Accept-Language': 'en-US,en;q=0.8,zh-Hans-CN;q=0.5,zh-Hans;q=0.3', 'Accept-Charset':'ISO-8859-1,utf-8;q=0.7,*;q=0.3', 'Accept-Encoding':'en-us', 'Connection':'keep-alive', 'Referer':'http://www.baidu.com/' } req_timeout = 5 testUrl = "http://www.baidu.com/" testStr = "wahaha" file1 = open('proxy.txt' , 'w') # url = "" # req = urllib2.Request(url,None,req_header) # jsondatas = urllib2.urlopen(req,None,req_timeout).read() cookies = urllib2.HTTPCookieProcessor() checked_num = 0 grasp_num = 0 for page in range(1, 160): req = urllib2.Request('http://www.xici.net.co/nn/' + str(page), None, req_header) html_doc = urllib2.urlopen(req, None, req_timeout).read() # html_doc = urllib2.urlopen('http://www.xici.net.co/nn/' + str(page)).read() soup = BeautifulSoup(html_doc) trs = soup.find('table', id='ip_list').find_all('tr') for tr in trs[1:]: tds = tr.find_all('td') ip = tds[1].text.strip() port = tds[2].text.strip() protocol = tds[5].text.strip() if protocol == 'HTTP' or protocol == 'HTTPS': #of.write('%s=%s:%s\n' % (protocol, ip, port)) print '%s=%s:%s' % (protocol, ip, port) grasp_num +=1 proxyHandler = urllib2.ProxyHandler({"http": r'http://%s:%s' % (ip, port)}) opener = urllib2.build_opener(cookies, proxyHandler) opener.addheaders = [('User-Agent', 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36')] t1 = time.time() try: req = opener.open(testUrl, timeout=req_timeout) result = req.read() timeused = time.time() - t1 pos = result.find(testStr) if pos > 1: file1.write(protocol+"\t"+ip+"\t"+port+"\n") checked_num+=1 print checked_num, grasp_num else: continue except Exception,e: continue file1.close() print checked_num,grasp_num |
个人感觉代码里没有太复杂的,就没有加注释,相信大家基本可以理解,如有问题也请多批评指正,共同进步!
以上这篇Python爬虫抓取代理IP并检验可用性的实例就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/lukaishilong/article/details/51900460