cookies与session
- cookies: stored in the browser (client) user information
- session: the user information stored on the server
- After the user logs in successfully, the server generates a random character string (session value)
user_data.py
user_online_data = {
'addr': [session1, u_id]
}Role is to make the client's user login once, the next time access to the server without logging in, you can use some features
cookies: user information is stored in the client's browser
Advantages are: the data can be stored in one of the client
The disadvantage is: Unsafe
session: the server is stored in the user information
Advantages are: data security
The disadvantage is: session not unique, you can store multiple copies, causes the server to take up too much space