简书文章异步加载
之前爬虫小分队的第一次作业就是爬取简书七日热门,同学们应该知道部分数据是异步加载的,对于阅读,评论,喜欢的抓取数据策略为使用正则表达式匹配,收录专题就是找包来获取数据的。
Selenium代码
from selenium import webdriver
url = 'http://www.jianshu.com/p/c9bae3e9e252'
def get_info(url):
include_title =[]
driver = webdriver.PhantomJS()
driver.get(url)
driver.implicitly_wait(20)
author = driver.find_element_by_xpath('//span[@class="name"]/a').text
date = driver.find_element_by_xpath('//span[@class="publish-time"]').text
word = driver.find_element_by_xpath('//span[@class="wordage"]').text
view = driver.find_element_by_xpath('//span[@class="views-count"]').text
comment = driver.find_element_by_xpath('//span[@class="comments-count"]').text
like = driver.find_element_by_xpath('//span[@class="likes-count"]').text
included_names = driver.find_elements_by_xpath('//div[@class="include-collection"]/a/div')
for i in included_names:
include_title.append(i.text)
print(author,date,word,view,comment,like,include_title)
get_info(url)
由于只搞了一个页面的,没有存入数据库,就打印了结果。
代码分析
由于selenium是加载了javascript的,所以我们用chrome浏览器,直接检查的xpath路径就能提取到信息,以收录专题为例,检查元素,来构造xpath路径,这样就不用找包啦。