django- Technical Session

django- Technical Session

1、Cookie

• Stored in the browser
• It is a key to the structure
• And the key is a string value
• You can set the survival time

2、Session

• Stored on the server
• It is a key to the structure
• Key is a string, to an object
• You can set the survival time

3, Session and Cookie relationship

• When the server for the first time session, the server creates a session object
• ID server session will object, wrote in the browser's Cookie

• Cookie key is sessionid, value ID session object

• When the server uses the session, the server looks for a called sessionid the Cookie from the Cookie in the corresponding browser
• If the corresponding sessionid find, obtain the corresponding value, and to find the corresponding session in the server

• If you can not find the corresponding sessionid, the server will create a new session object

Enable session in the django

1, python manage.py migrate migration built-in application, generate relevant table

2, generates a table django_session

• session_key session key corresponding to
• session_data session content corresponding
• expire_date session expiration time

In the program through request.sessionto get the session object

session for storage and user / browser -related data

session result is stored in the form of a dictionary

Corresponding to a session must be stored serialized object JSON

session default expiration time is 2 weeks

django global configuration file is global_settings.py

CTRL + N global_settings

session Destruction (exit)

• flush()

  • Forcibly cleared, the demise of the current session

• clear_expired()

  • The session has expired Clear All