![]() 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 Remotely execute arbitrary code, as the data is serialized using pickle. Generate falsified session data, which your site will trust, but also If the SECRET_KEY is not kept secret and you are using the PickleSerializer, this canĪn attacker in possession of the SECRET_KEY can not only If you use the cached_db session backend, you also need to follow theĬonfiguration instructions for the using database-backed sessions. Session data be expunged from time to time, the cache backend is for you. In most cases, the cached_db backend will be fastĮnough, but if you need that last bit of performance, and are willing to let Session reads only use the database if the data is notīoth session stores are quite fast, but the simple cache is faster because itĭisregards persistence. Write-through cache – every write to the cache will also be written to For persistent, cached data, set SESSION_ENGINE to.However, sessionĭata may not be persistent: cached data can be evicted if the cache fills Session data will be stored directly in your cache. Once your cache is configured, you’ve got two choices for how to store data in 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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