Selenium抓取动态网页数据

发表于:2019-7-08 11:03

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 作者:enjoyzier    来源:博客园

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   1.7 爬取拉钩网职位信息
  import requests
  from lxml import etree
  import time
  import re
  headers = {
  "Accept":"application/json, text/javascript, */*; q=0.01",
  "Accept-Encoding":"gzip, deflate, br",
  "Accept-Language":"zh-CN,zh;q=0.9",
  "Connection":"keep-alive",
  "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36",
  "Referer":"https://www.lagou.com/jobs/list_python?labelWords=&fromSearch=true&suginput=",
  "Origin":"https://www.lagou.com",
  "Host":"www.lagou.com",
  "Content-Type":"application/x-www-form-urlencoded; charset=UTF-8",
  "Cookie":"_ga=GA1.2.1602115737.1553064534; user_trace_token=20190320144853-39b1375a-4adc-11e9-a253-525400f775ce; LGUID=20190320144853-39b13f88-4adc-11e9-a253-525400f775ce; WEBTJ-ID=20190408120043-169fb1afd63488-06179b118ca307-7a1437-2073600-169fb1afd648ed; _gid=GA1.2.1826141825.1554696044; sensorsdata2015jssdkcross=%7B%22distinct_id%22%3A%22169fb1bb2c41ea-04951e55adc96a-7a1437-2073600-169fb1bb2c58d0%22%2C%22%24device_id%22%3A%22169fb1bb2c41ea-04951e55adc96a-7a1437-2073600-169fb1bb2c58d0%22%7D; sajssdk_2015_cross_new_user=1; _putrc=4C5D2603888320CA; JSESSIONID=ABAAABAAADEAAFIB00F5DDE71D51610901CB9E0031812BA; login=true; unick=%E4%BC%8D%E6%99%93%E4%B8%BD; showExpriedIndex=1; showExpriedCompanyHome=1; showExpriedMyPublish=1; hasDeliver=49; gate_login_token=7b04a40da89145a1fbc90a3d719616d28c8b0a303344ac37; index_location_city=%E6%88%90%E9%83%BD; X_MIDDLE_TOKEN=1221e6b5040722dc86f5ceb557e11965; _gat=1; LGSID=20190408151935-a9976fbf-59ce-11e9-8cc8-5254005c3644; PRE_UTM=m_cf_cpc_baidu_pc; PRE_HOST=www.baidu.com; PRE_SITE=https%3A%2F%2Fwww.baidu.com%2Fbaidu.php%3Fsc.Ks000001qLT2daZnZWIez3ktR_jhHue3tONZubxU9mivhxeuj-Fxrjg6NnVcKTp-GYJ_YRvrc9_yOJ4uV-IEpfnPazPz7ctjve1qlDokCDfHYo9PV0uDfTmN1OunNUcCRU-sJuR8RZz60PAXzfKybAdvuCxUedbt8aWtTjAdCCuO298TwT8zN1-T5EG3kgkOweg0DHGIbvP55IZbr6.DY_NR2Ar5Od663rj6tJQrGvKD7ZZKNfYYmcgpIQC8xxKfYt_U_DY2yP5Qjo4mTT5QX1BsT8rZoG4XL6mEukmryZZjzsLTJplePXO-8zNqrw5Q9tSMj_qTr1x9tqvZul3xg1sSxW9qx-9LdoDkY4QPSl81_4pqO24rM-8dQjPakb3dS5iC0.U1Yk0ZDqs2v4VnL30ZKGm1Yk0Zfqs2v4VnL30A-V5HcsP0KM5gK1n6KdpHdBmy-bIykV0ZKGujYzr0KWpyfqnWcv0AdY5HDsnHIxnH0krNtknjc1g1nsnHNxn1msnfKopHYs0ZFY5HDLn6K-pyfq0AFG5HcsP0KVm1Y3nHDYP1fsrjuxnH0snNtkg1Dsn-ts0Z7spyfqn0Kkmv-b5H00ThIYmyTqn0K9mWYsg100ugFM5H00TZ0qPWm1PHm1rj640A4vTjYsQW0snj0snj0s0AdYTjYs0AwbUL0qn0KzpWYs0Aw-IWdsmsKhIjYs0ZKC5H00ULnqn0KBI1Ykn0K8IjYs0ZPl5fK9TdqGuAnqTZnVUhC0IZN15Hnkn1fknHT4P1DvPHR1PW61P100ThNkIjYkPHRYP10LrHTkPjTY0ZPGujd9rAwBmhuWrj0snjDzrj0Y0AP1UHYsPbm3wWTsrH0srjwarDcz0A7W5HD0TA3qn0KkUgfqn0KkUgnqn0KlIjYs0AdWgvuzUvYqn7tsg1Kxn7ts0Aw9UMNBuNqsUA78pyw15HKxn7tsg1nkrjm4nNts0ZK9I7qhUA7M5H00uAPGujYknjT1P1fkrjcY0ANYpyfqQHD0mgPsmvnqn0KdTA-8mvnqn0KkUymqn0KhmLNY5H00uMGC5H00uh7Y5H00XMK_Ignqn0K9uAu_myTqnfK_uhnqn0KEIjYs0AqzTZfqnanscznsc100mLFW5HRdPj0Y%26word%3D%25E6%258B%2589%25E5%258B%25BE%25E7%25BD%2591%26ck%3D1701.10.72.227.558.354.602.254%26shh%3Dwww.baidu.com%26sht%3D62095104_19_oem_dg%26us%3D1.0.1.0.1.301.0%26bc%3D110101; PRE_LAND=https%3A%2F%2Fwww.lagou.com%2Flp%2Fhtml%2Fcommon.html%3Futm_source%3Dm_cf_cpc_baidu_pc%26m_kw%3Dbaidu_cpc_cd_e110f9_d2162e_%25E6%258B%2589%25E5%258B%25BE%25E7%25BD%2591; Hm_lvt_4233e74dff0ae5bd0a3d81c6ccf756e6=1553064535,1554696044,1554707975; TG-TRACK-CODE=index_search; SEARCH_ID=16b25888bc6f489f981996ef505d6930; X_HTTP_TOKEN=3704e5535eab672a10080745514b2c7fac0430c282; Hm_lpvt_4233e74dff0ae5bd0a3d81c6ccf756e6=1554708001; LGRID=20190408152002-b9743b5b-59ce-11e9-9a84-525400f775ce",
  "X-Anit-Forge-Code":"0" ,
  "X-Anit-Forge-Token":'',
  "X-Requested-With":'XMLHttpRequest'
  }
  def get_detail_page_url():
  datas =[]
  url = 'https://www.lagou.com/jobs/positionAjax.json'
  form_data = {
  "first":"faise",
  "pn":1,
  "kd":"python"
  }
  params = {
  'city':'成都',
  'needAddtionalResult':'false'
  }
  for pn in range(1,14):
  form_data['pn'] = pn
  response = requests.request(method='post',url=url,headers=headers,params = params,data = form_data)
  result = response.json()
  result_list = result['content']['positionResult']['result']
  for position in result_list:
  position_id = position['positionId']
  detail_url = 'https://www.lagou.com/jobs/%s.html'%position_id
  data = parse_detail_page(detail_url)
  datas.append(data)
  time.sleep(2)
  return datas
  def parse_detail_page(url):
  resonse = requests.request(method='get',url=url,headers = headers)
  text = resonse.text
  html = etree.fromstring(text,parser=etree.HTMLParser())
  position_name = html.xpath('//span[@class="name"]/text()')[0].strip()
  detail_list = html.xpath('//dd[@class="job_request"]//span')
  salary = detail_list[0].xpath('text()')[0].strip()
  city = detail_list[1].xpath('text()')[0].strip()
  city = re.sub(r'[\s/]','',city)
  work_years = detail_list[2].xpath('text()')[0].strip()
  work_years = re.sub(r'[\s/]','',work_years)
  education = detail_list[3].xpath('text()')[0].strip()
  education = re.sub(r'[\s/]','',education)
  job_details = ''.join(html.xpath('//div[@class="job-detail"]//p//text()'))
  data = {
  "position_name":position_name,
  "salay":salary,
  "city":city,
  "work_years":work_years,
  "education":education,
  "job_details":job_details
  }
  return data
  def main():
  datas = get_detail_page_url()
  print(datas)
  if __name__ == '__main__':
  main()

from selenium import webdriver
  from selenium.webdriver.support.ui import WebDriverWait
  from selenium.webdriver.support import expected_conditions as EC
  from selenium.webdriver.common.by import By
  from lxml import etree
  import re
  import time
  class Lagouspider(object):
  driver_path = r'E:\study\chromedriver\chromedriver.exe'
  def __init__(self):
  self.driver = webdriver.Chrome(executable_path=Lagouspider.driver_path)
  self.url = 'https://www.lagou.com/jobs/list_python?labelWords=&fromSearch=true&suginput='
  self.positions = []
  def run(self):
  while True:
  self.driver.get(self.url)
  source = self.driver.page_source
  WebDriverWait(driver=self.driver,timeout=10).until(EC.presence_of_element_located((By.XPATH,'//div[@class="pager_container"]/span[last()]')))
  self.parse_list_page(source)
  next_btn = self.driver.find_element_by_xpath('//div[@class="pager_container"]/span[last()]')
  if "pager_next_disabled"  in next_btn.get_attribute('class'):
  break
  else:
  next_btn.click()
  time.sleep(1)
  def parse_list_page(self,source):
  html = etree.HTML(source)
  links = html.xpath('//a[@class="position_link"]/@href')
  for link in links:
  self.request_detail_page(link)
  time.sleep(1)
  def request_detail_page(self,url):
  self.driver.execute_script("window.open('%s')"%url)
  self.driver.switch_to.window(self.driver.window_handles[1])
  WebDriverWait(self.driver,timeout=10).until(EC.presence_of_element_located((By.XPATH,'//span[@class="name"]')))
  source = self.driver.page_source
  self.parse_detail_page(source)
  #关闭当前详情页
  self.driver.close()
  #切换回职位列表页
  self.driver.switch_to.window(self.driver.window_handles[0])
  def parse_detail_page(self,source):
  html = etree.HTML(source)
  position_name = html.xpath('//span[@class="name"]/text()')[0].strip()
  detail_list = html.xpath('//dd[@class="job_request"]//span')
  salary = detail_list[0].xpath('text()')[0].strip()
  city = detail_list[1].xpath('text()')[0].strip()
  city = re.sub(r'[\s/]', '', city)
  work_years = detail_list[2].xpath('text()')[0].strip()
  work_years = re.sub(r'[\s/]', '', work_years)
  education = detail_list[3].xpath('text()')[0].strip()
  education = re.sub(r'[\s/]', '', education)
  desc = ''.join(html.xpath('//dd[@class="job_bt"]//text()')).strip()
  data = {
  "name": position_name,
  "salay": salary,
  "city": city,
  "work_years": work_years,
  "education": education,
  "desc": desc
  }
  print(data)
  print('+'*40)
  self.positions.append(data)
  if __name__ == '__main__':
  spider = Lagouspider()
  spider.run()
 
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22/2<12
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