模拟登陆京东并访问我的订单

第一个出现错误

# -*- coding: utf-8 -*-

import requests 

url = 'https://passport.jd.com/uc/loginService'
headers = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36'}

data = {
    
    'loginname': 'XXXXXXX',
    'nloginpwd': 'XXXXXXXX'
}

r = requests.post(url, data)
print r.text

url1 = 'https://order.jd.com/center/list.action'

r1 = requests.get(url1)
print r1.text 

 第二个正常

import requests 

url = 'https://passport.jd.com/uc/loginService'
headers = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36'}

data = {
  
  'loginname': 'XXXXXXX',
  'nloginpwd': 'XXXXXXXX'
}

session = requests.Session()

r = session.post(url, data)

print r.text

url1 = 'https://order.jd.com/center/list.action'

r1 = session.get(url1)
print r1.text 

非常清晰体现出了session的用途.   

requests库的session对象能够帮我们跨请求保持某些参数，也会在同一个session实例发出的所有请求之间保持cookies

print r.cookies.values()
print r1.cookies.values()

print r.cookies.keys()
print r1.cookies.keys()

print r.cookies.get_dict()
print r1.cookies.get_dict()

示例 

s = requests.session()
# req_param = '{"belongId": "300001312","userName": "alitestss003","password":"pxkj88","captcha":"pxpx","captchaKey":"59675w1v8kdbpxv"}'
# res = s.post('http://test.e.fanxiaojian.cn/metis-in-web/auth/login', json=json.loads(req_param))
# # res1 = s.get("http://test.e.fanxiaojian.cn/eos--web/analysis/briefing")
# print(res.cookies.values())   获取登陆的所有session

参考文献：

http://docs.python-requests.org/zh_CN/latest/user/quickstart.html  

https://www.jb51.net/article/141305.htm

https://www.cnblogs.com/lingxia/p/9074620.html