requests获取cookie和使用cookie的方法

原文地址：https://www.cnblogs.com/liuzhzhao/p/12114453.html，感谢博主！

一. 用 requests.utils.dict_from_cookiejar() 把返回的cookies转换成字典

　　1. 处理cookies：

 1 import requests
 2 
 3 def login():
 4     login_url = 'http://www.xxx.com/login
 5     headers = {
 6         "Accept": "application/json, text/javascript, */*; q=0.01"
 7     }
 8     body = {
 9         "usercode": "liuzz05@****.com",
10         "password": "123456"
11     }
12     try:
13         res = requests.post(url=login_url, headers=headers, data=body)
14         cookies = res.cookies
15 
16         cookie = requests.utils.dict_from_cookiejar(cookies)
17 
18         return cookie
19     except Exception as err:
20         print('获取cookie失败：\n{0}'.format(err))

  　　2. 使用cookie：

一、把cookies作为参数传入（建议使用这种，第二种有时候会失败，具体原因还请大神请教。其实最好的方式还是用requests.Session()这种方式保存cookie状态最好https://i.cnblogs.com/posts/edit;postId=12692370）
1 import requests
2 
3 def get_data():
4     cookie = login()
5     res = requests.get(url=get_data_url, cookies=cookie)
6     print(res.text)

 二. 遍历cookies的键值，拼接成cookie格式

　　1. 处理cookies：

 1 import requests
 2 
 3 def login():
 4     login_url = 'http://www.xxx.com/login
 5     headers = {
 6         "Accept": "application/json, text/javascript, */*; q=0.01"
 7     }
 8     body = {
 9         "usercode": "liuzz05@****.com",
10         "password": "123456"
11     }
12     try:
13         res = requests.post(url=login_url, headers=headers, data=body)
14         cookies = res.cookies.items()
15 
16         cookie = ''
17         for name, value in cookies:
18             cookie += '{0}={1};'.format(name, value)
19 
20         return cookie
21     except Exception as err:
22         print('获取cookie失败：\n{0}'.format(err))

  　　2. 使用cookie：

1 import requests
2 
3 def get_data():
4     cookie = login()
5     headers = {
6         "cookie": cookie
7     }
8     res = requests.get(url=get_data_url, headers=headers)
9     print(res.text)