python crawl

python爬虫下载页面代码备用。

# -*- coding:utf-8 -*-
import requests
import re
import randomclass download:def __init__(self):self.user_agent_list = ["Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/22.0.1207.1 Safari/537.1","Mozilla/5.0 (X11; CrOS i686 2268.111.0) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.6 (KHTML, like Gecko) Chrome/20.0.1092.0 Safari/536.6","Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.6 (KHTML, like Gecko) Chrome/20.0.1090.0 Safari/536.6","Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/19.77.34.5 Safari/537.1","Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.9 Safari/536.5","Mozilla/5.0 (Windows NT 6.0) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.36 Safari/536.5","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1063.0 Safari/536.3","Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1063.0 Safari/536.3","Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_0) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1063.0 Safari/536.3","Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1062.0 Safari/536.3","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1062.0 Safari/536.3","Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.1 Safari/536.3","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.1 Safari/536.3","Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.1 Safari/536.3","Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.0 Safari/536.3","Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.24 (KHTML, like Gecko) Chrome/19.0.1055.1 Safari/535.24","Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/535.24 (KHTML, like Gecko) Chrome/19.0.1055.1 Safari/535.24"]self.iplist = []def get(self, url, timeout, proxy=None, num_retries = 6):UA = random.choice(self.user_agent_list)headers = {'User-Agent': UA,'Accept': "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",'Accept-Encoding': 'gzip, deflate, sdch',}if proxy == None:try:response = requests.get(url, headers = headers)return responseexcept:if num_retries > 0:time.sleep(10)print(u'获取网页出错，10S后将获取倒数第：', num_retries, u'次')return self.get(url, timeout, num_retries-1)else:print(u'开始使用代理')time.sleep(10)IP = ''.join(str(random.choice(self.iplist)).strip())proxy = {'http': IP}return self.get(url, timeout, proxy,)else:try:IP = ''.join(str(random.choice(self.iplist)).strip())proxy = {'http': IP}response = requests.get(url, headers=headers, proxies = proxy)return response except:if num_retries > 0:time.sleep(10)IP = ''.join(str(random.choice(self.iplist)).strip())proxy = {'http': IP}print(u'获取网页出错，10S后将获取倒数第：', num_retries, u'次')print(u'开始使用代理')return self.get(url, timeout, proxy, num_retries-1)else:print(u'代理也不好使了！取消代理')return self.get(url, 3)def analysis(self):html = self.get("http://haoip.cc/tiqu.htm", 3)iplistn = re.findall(r'r/>(.*?)<b', html.text, re.S)for ip in iplistn:i = re.sub('\n', '', ip)self.iplist.append(i.strip())print(i.strip())print (self.iplist)Download = download()
Download.analysis()

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