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I am serializing/pickling an object, encoding it as a compressed string, and passing it as a parameter in the URL for the next page to deserialize. My web app does not have a database; I am doing this because the app gets data from external web services, which are slow.
Is this acceptable practice? Is this a security risk? Is there a way to make this secure?
If you need to share data between views, do it with the session. That’s what sessions are made for. Session info is stored in the database by default, but it doesn’t have to be, you can also use the filesystem, some caching system (memcache, Redis, etc), or signed-cookies (Django 1.4+ only).
See: