python 爬取k12出現重定向問題解決方法

import requests

url ='http://rc.k12.com.cn/cloudRes/res/download/id/440511'
headers ={
    'Host':'rc.k12.com.cn',
    'User-Agent':' Mozilla/5.0 (Windows NT 6.3; WOW64; rv:58.0) Gecko/20100101 Firefox/58.0',
    'Accept':' text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Accept-Language':'zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2',
    'Accept-Encoding':'gzip, deflate',
   # 'Referer':'http://rc.k12.com.cn/cloudRes/res/show/id/440511',
    'Cookie':'symfony=225p3j7b9qtvlrkfh2sabptuu6; bdshare_firstime=1520642275017',
    'Connection':'keep-alive',
    'Upgrade-Insecure-Requests':'1',
    'Pragma':'no-cache',
    'Cache-Control':' no-cache',
}
html = requests.get(url,data =headers,allow_redirects=False)
print(html.headers['Location'])

狀態301永久重定向   302 臨時重定向

取到正確的下載地址

https://ssl.k12.com.cn/k12cas/login?service=http%3A%2F%2Frc.k12.com.cn%2FcloudRes%2Fres%2Fdownload%2Fid%2F440511