July 2017
Beginner to intermediate
340 pages
7h 43m
English
Content preview from Python Microservices Development
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The session object
Like the request object, Flask creates a session object, which is unique to the request context.
It's a dict-like object, which Flask serializes into a cookie on the user side. The data contained into the session mapping is dumped into a JSON mapping, then compressed using zlib when that makes it smaller, and finally encoded in base64.
When the session gets serialized, the itsdangerous (https://pythonhosted.org/itsdangerous/) library signs the content using the secret_key value defined at the application level. The signing uses HMAC (https://en.wikipedia.org/wiki/Hash-based_message_authentication_code) and SHA1.
This signature, which is added as a suffix in the data, ensures that the client cannot tamper with the data that ...
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