python - 如何从彭博等安全网站提取数据

Question

我正在尝试抓取此网址上的项目:

"https://www.bloomberg.com/news/articles/2019-05-30/tesla-dealt-another-blow-as-barclays-sees-it-as-niche-carmaker"

我只想获取标题和发布日期，您可以给我任何示例代码，甚至是splash等

到目前为止我尝试过的是这个

 def parse(self, response):
   yield scrapy.Request('https://www.bloomberg.com/news/articles/2019-05-30/tesla-dealt-another-blow-as-barclays-sees-it-as-niche-carmaker -H x-crawlera-use-https:1',
        headers={'X-Crawlera-Session': create,
        'X-Crawlera-Timeout': 40000,
        'X-Crawlera-Max-Retries': 5,
        'X-Crawlera-Cookies': disable,
        'X-Crawlera-Session': self.session_id
        },
        callback=self.parse_sub,
        )

 def parse_sub(self, response):
    response.xpath("//h1[@class = 'lede-text-v2__hed']").extract_first()
    response.xpath("//meta[@property = 'og:title']/@content").extract_first()
    response.xpath("//time[@class = 'article-timestamp']/@datetime").extract_first()
   print(response.text)

我也在使用crawlera，但它一直将我检测为机器人

Answer 1

仅使用 selenium提取标题，即特斯拉在巴克莱称其为“利基汽车制造商”时再次受到打击和发布日期，即5月30日， 2019 年下午 5:26 GMT+5:30 您必须为 visibility_of_element_ located() 引入 WebDriverWait，并且您可以使用以下解决方案:

• 代码块

  from selenium import webdriver
  
  driver = webdriver.Firefox(executable_path=r'C:\Utility\BrowserDrivers\geckodriver.exe')
  driver.get('https://www.bloomberg.com/news/articles/2019-05-30/tesla-dealt-another-blow-as-barclays-sees-it-as-niche-carmaker')
  print(WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.XPATH, "//div[text()='markets']//following:: h1[1]"))).get_attribute("innerHTML"))
  print(WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.XPATH, "//div[text()='markets']//following:: h1[1]//following::div[@class='lede-text-v2__times']/time[@itemprop='datePublished']"))).get_attribute("innerHTML"))
  driver.quit() 
  

• 控制台输出:

  Tesla Dealt Another Blow When Barclays Calls It a ‘Niche Carmaker’
  May 30, 2019, 5:26 PM GMT+5:30
  

• 注意:您必须添加以下导入:

  from selenium import webdriver
  from selenium.webdriver.support.ui import WebDriverWait
  from selenium.webdriver.common.by import By
  from selenium.webdriver.support import expected_conditions as EC