Python 爬虫实现增加播客访问量的方法实现

#!/usr/bin/env python# -*- coding: utf-8 -*-# @Author: Nick# @Date:  2019-10-24 15:40:58# @Last Modified by:  Nick# @Last Modified time: 2019-10-24 16:54:31import randomimport reimport timeimport urllibimport requestsfrom bs4 import BeautifulSoupfrom fake_useragent import UserAgenttry:  from lxml import etreeexcept Exception as e:  import lxml.html  # 实例化一个etree对象（解决通过from lxml import etree导包失败）  etree = lxml.html.etree# 实例化UserAgent对象，用于产生随机UserAgentua = UserAgent()class BlogSpider(object):  """  Increase the number of CSDN blog visits.  """  def __init__(self):    self.url = "https://blog.csdn.net/PY0312/article/list/{}"    self.headers = {      "Referer": "https://blog.csdn.net/PY0312/",      "User-Agent": ua.random    }    self.firefoxHead = {      "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0"}    self.IPRegular = r"(([1-9]?/d|1/d{2}|2[0-4]/d|25[0-5]).){3}([1-9]?/d|1/d{2}|2[0-4]/d|25[0-5])"  def send_request(self, num):    """    模拟浏览器发起请求    :param num: num    :return: html_str    """    html_str = requests.get(self.url.format(      num), headers=self.headers).content.decode()    # print(html_str)    return html_str  def parse_data(self, html_str):    """    用于解析发起请求返回的数据    :param html_str:    :return: each_page_urls    """    # 将返回的 html字符串 转换为 element对象，用于xpath操作    element_obj = etree.HTML(html_str)    # print(element_obj)    # 获取每一页所有blog的url    each_page_urls = element_obj.xpath(      '//*[@id="mainBox"]/main/div[2]/div/h4/a/@href')    # print(each_page_urls)    return each_page_urls  def parseIPList(self, url="http://www.xicidaili.com/"):    """    爬取最新代理ip，来源：西刺代理    注意：西刺代理容易被封，如遇到IP被封情况，采用以下两种方法即可解决：    方法一：请参考我上一篇博客《Python 实现快代理IP爬虫》 ===> 喜欢研究的同学，可参考对接此接口    方法二：直接屏蔽掉此接口，不使用代理也能正常使用    :param url: "http://www.xicidaili.com/"    :return: 代理IP列表ips    """    ips = []    request = urllib.request.Request(url, headers=self.firefoxHead)    response = urllib.request.urlopen(request)    soup = BeautifulSoup(response, "lxml")    tds = soup.find_all("td")    for td in tds:      string = str(td.string)      if re.search(self.IPRegular, string):        ips.append(string)    # print(ips)    return ips  def main(self, total_page, loop_times, each_num):    """    调度方法    :param total_page: 设置博客总页数    :param loop_times: 设置循环次数    :param each_num: 设置每一页要随机挑选文章数    :return:    """    i = 0    # 根据设置次数，打开循环    while i < loop_times:      # 遍历，得到每一页的页码      for j in range(total_page):        # 拼接每一页的url，并模拟发送请求, 返回响应数据        html_str = self.send_request(j + 1)        # 解析响应数据，得到每一页所有博文的url        each_page_urls = self.parse_data(html_str)        # 调用parseIPList随机产生代理IP，防反爬        # ips = self.parseIPList()        # proxies = {"http": "{}:8080".format(        #   ips[random.randint(0, 40)])}        # 遍历，每一页随机挑选each_num篇文章        for x in range(each_num):          # 随机抽取每一页的一篇博文进行访问，防反爬          current_url = random.choice(each_page_urls)          status = True if requests.get(            current_url, headers=self.headers).content.decode() else False          print("当前正在访问的文章是：{}，访问状态：{}".format(current_url, status))          time.sleep(1)  # 延时1秒，防反爬        time.sleep(1)  # 延时1秒，防反爬      i += 1if __name__ == '__main__':  bs = BlogSpider()  bs.main(7, 200, 3) # 参数参照main方法说明，酌情设置