snap- Top-level package for the Snap Web Framework

Safe HaskellNone



This module is meant to be used mainly by Session backend developers, who would naturally need access to ISessionManager class internals. You can also use it if you need low-level access to the backend functionality.



data SessionManager Source #

Any Haskell record that is a member of the ISessionManager typeclass can be stuffed inside a SessionManager to enable all session-related functionality.

To use sessions in your application, just find a Backend that would produce one for you inside of your Initializer. See initCookieSessionManager in CookieSession for a built-in option that would get you started.


ISessionManager a => SessionManager a 

class ISessionManager r where Source #

Minimal complete definition

load, commit, reset, touch, insert, lookup, delete, csrf, toList


load :: r -> Snap r Source #

Load a session from given payload.

Will always be called before any other operation. If possible, cache and do nothing when called multiple times within the same request cycle.

commit :: r -> Snap () Source #

Commit session, return a possibly updated paylaod

reset :: r -> Snap r Source #

Reset session

touch :: r -> r Source #

Touch session

insert :: Text -> Text -> r -> r Source #

Insert a key-value pair into session

lookup :: Text -> r -> Maybe Text Source #

Lookup a key in session

delete :: Text -> r -> r Source #

Delete a key in session

csrf :: r -> Text Source #

Return a session-specific CSRF protection token. See mkCSRFToken for help in creating the value.

toList :: r -> [(Text, Text)] Source #

Return all key-value pairs as an association list