This is the base class for all session objects. You can read it and write to ssion at any point in your view. Session attribute, which is a dictionary-like object. ![]() Object – the first argument to any Django view function – will have a When SessionMiddleware is activated, each HttpRequest Cookies will onlyīe detected as ‘stale’ if they are older than yourįinally, the size of a cookie can have an impact on the speed of your site. Thus if an attacker steals a user’s cookie, they can use thatĬookie to login as that user even if the user logs out. When a user logs out, cookie-based sessions are not invalidated when a user Unlike other sessionīackends which keep a server-side record of each session and invalidate it This means that for some uses of session data, theĬookie backend might open you up to replay attacks. that you are being sent back the last thing you Integrity of the data (that it is all there and correct), it cannot (that it was generated by your site, and not someone else), and the Note also that while the MAC can guarantee the authenticity of the data Possible to exceed the common limit of 4096 bytes Even though Django compresses the data, it’s still entirely your user’s browser) can’t store all of the session cookie andĭrops data. The same invalidation happens if the client storing theĬookie (e.g. When using the cookies backend the session data can be read by the client.Ī MAC (Message Authentication Code) is used to protect the data againstĬhanges by the client, so that the session data will be invalidated when being The session data is signed but not encrypted If you use cookie-based sessions, pay extra care that your secret key isĪlways kept completely secret, for any system which might be remotely SECRET_KEY_FALLBACKS can not only generate falsified sessionĭata, which your site will trust, but also remotely execute arbitrary code, Secret and you are using the .PickleSerializer, this can leadĪn attacker in possession of the SECRET_KEY or If the SECRET_KEY or SECRET_KEY_FALLBACKS are not kept This avoids edge cases caused by unreliable data storage in production. But unless your cache is definitelyĬonfigured for sufficient persistence, opt for the cached database backend. The cache backend can be made persistent by using a persistent cache, such as Up or the cache server is restarted, and it will mean session data is lost, This isįaster because it avoids database persistence, but you will have to consider The cache backend ( cache) stores session data only in your cache. ![]() Instructions for the using database-backed sessions. ".cached_db", and follow the configuration Use the cache, or the database if the data has been evicted from the cache. Session writes are applied to both the cache and the database. The cached database backend ( cached_db) uses a write-through cache – Once your cache is configured, you have to choose between a database-backed To use another cache, set SESSION_CACHE_ALIAS to the If you have multiple caches defined in CACHES, Django will use theĭefault cache. NOT multi-process safe, therefore probably not a good choice for production Additionally, the local-memory cache backend is Long enough to be a good choice, and it’ll be faster to use file orĭatabase sessions directly instead of sending everything through the file The local-memory cache backend doesn’t retain data You should only use cache-based sessions if you’re using the Memcached or
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