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From "Les Hazlewood (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SHIRO-266) Login/Logout: Enable pluggable Subject state binding
Date Fri, 01 Jul 2011 05:50:28 GMT

    [ https://issues.apache.org/jira/browse/SHIRO-266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13058223#comment-13058223
] 

Les Hazlewood commented on SHIRO-266:
-------------------------------------

Latest commit has the following changes:

- The DefaultSessionStorageEvaluator has been changed to allow usage of the Session by default
if one already exists.  If one does not exist, only then is the isSessionStorageEnabled()
class-level property consulted.  It didn't make sense to not use the session if the application
developer has already created one (by calling subject.getSession() somewhere in their own
code).

- New web-specific objects have been introduced to enable most web applications to receive
enabling/disabling benefits simply by request-specific configuration.  For example, a new
'NoSessionCreationFilter' has been introduced (in the pool of Default Filters as 'noSession').
 This can be used in Shiro's filter chains, for example, in shiro.ini:

[urls]
/rest/** = noSession, authcBasic

The 'noSession' filter triggers logic that will prevent both Shiro and application developers
from calling subject.getSession() and subject.getSession(true) for request patterns that should
be stateless (no sessions).

A new DefaultWebSessionStorageEvaluator has been introduced that retains the DefaultSessionStorageEvaluator
parent class logic, but will additionally look for a request attribute (set by the 'noSession'
filter) to trigger this request-specific subject enable/disable logic.  The DefaultWebSecurityManager
enables this DefaultWebSessionStorageEvaluator by default.

Finally, more unit tests have been added.  DefaultWebSessionStorageEvaluator has 100% method/line
coverage.


> Login/Logout: Enable pluggable Subject state binding
> ----------------------------------------------------
>
>                 Key: SHIRO-266
>                 URL: https://issues.apache.org/jira/browse/SHIRO-266
>             Project: Shiro
>          Issue Type: Improvement
>          Components: Session Management, Subject
>    Affects Versions: 1.0.0, 1.1.0, 1.1.1
>            Reporter: Les Hazlewood
>            Assignee: Les Hazlewood
>             Fix For: 1.2.0
>
>
> After login, a subject's state (principals, authentication state, etc) are bound to the
Subject's session.  This allows Shiro to reconstruct the Subject instance later on by acquiring
a Session (e.g. by id) and reconstructing the Subject based on the Session's state.
> In stateless environments (e.g. some REST-enabled applications), it is not desirable
to create a session.  There should be a pluggable component that performs state binding and
unbinding for subject login and logout, respectively.  Stateless applications can choose to
configure Shiro with a stateless binder if they don't want sessions to be created.

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