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tenduke::oidc::OIDCSession Class Referenceabstract

#include <OIDCSession.h>

Detailed Description

Stateful service to manage OIDC-session.

NOTE: Try to avoid excessive use of reEstablish(), refresh() or heartbeat(). It is usually enough to call ensureValidSession() before an API request. We trust that usually the local state is in sync with the backend. Excessive use of reEstablish(), refresh() or heartbeat() cause increased latency and consume unnecessary backend resources. Only use those methods, if there is a evidence or reasonable doubt that the local state is out-of-sync with the backend.

Inheritance diagram for tenduke::oidc::OIDCSession:
tenduke::oidc::OIDCSessionImpl tenduke::oidc::SerializedOIDCSession tenduke::test::mocks::OIDCSessionMock tenduke::oidc::IdTokenSession

Public Member Functions

virtual void ensureValidSession ()=0
 Checks that the OIDC session is valid, but if it is NOT, either refreshes the access token or authenticates the user.
 
virtual std::string getAccessToken ()=0
 Returns access token of the session.
 
virtual std::shared_ptr< const tenduke::oidc::OIDCStategetOIDCState ()=0
 Returns the current OIDC-state for inspection.
 
virtual bool heartbeat ()=0
 Executes a heartbeat with the backend, checking that the current access token really works.
 
virtual void invalidate ()=0
 Invalidates the session.
 
virtual bool isValid ()=0
 Checks that local session is valid.
 
virtual void refresh ()=0
 Forces refresh of the session.
 
virtual void reEstablish ()=0
 Re-establishes the session: Tries first to refresh the state, if it fails, re-authenticates the user.
 

Member Function Documentation

◆ ensureValidSession()

virtual void tenduke::oidc::OIDCSession::ensureValidSession ( )
pure virtual

Checks that the OIDC session is valid, but if it is NOT, either refreshes the access token or authenticates the user.

Call this method before doing request which uses the access token (method getAccessToken()). You do not need call this method unless you want to use access token: E.g. it is unnecessary to schedule a task for this.

Valid OIDC session requires a non-expired access token. If the access token has expired, this method tries to refresh the access token. If the refresh fails because the the refresh token has expired or if there is no valid session in the first place (i.e. there is no access token), the service starts login flow.

Note that this method cannot guarantee that the next request with the access token does not fail. For possible reasons, see method isValid().

Because of this, requests using the access token should prepare to handle HTTP 401 errors by calling this method again.

Exceptions
tenduke::InterruptedExceptionwhen e.g. login was aborted
tenduke::TimedOutwhen login times out or concurrent thread times out waiting to execute this method

Implemented in tenduke::oidc::OIDCSessionImpl, and tenduke::oidc::SerializedOIDCSession.

◆ getAccessToken()

virtual std::string tenduke::oidc::OIDCSession::getAccessToken ( )
pure virtual

Returns access token of the session.

Returns
the access token. Returned value is std::string::empty() if the user has not authenticated. Note that the returned value might not be working access token if the token has expired.
Exceptions
tenduke::TimedOutwhen concurrent access times out

Implemented in tenduke::oidc::OIDCSessionImpl, and tenduke::oidc::SerializedOIDCSession.

◆ getOIDCState()

virtual std::shared_ptr< const tenduke::oidc::OIDCState > tenduke::oidc::OIDCSession::getOIDCState ( )
pure virtual

Returns the current OIDC-state for inspection.

The state MUST NOT be modified.

Returns
the current OIDC-state or nullptr if there is no current state
Exceptions
tenduke::TimedOutwhen concurrent access times out

Implemented in tenduke::oidc::OIDCSessionImpl, and tenduke::oidc::SerializedOIDCSession.

◆ heartbeat()

virtual bool tenduke::oidc::OIDCSession::heartbeat ( )
pure virtual

Executes a heartbeat with the backend, checking that the current access token really works.

The heartbeat does not modify the state, even if the credentials are defunct. Typical reaction after false is to call reEstablish().

IMPORTANT: Do not call this repeatedly (e.g. schedule a task to execute heart beats). Also, you don't need to call this just before executing an API call. We trust that normally the local state is in sync with the backend and using OIDCSession::ensureValidSession() is usually enough. This method should only be used when there is doubt that the local session state is not in sync with the backend.

Returns
true if the check was OK and local state is still valid. Returns false otherwise.
Exceptions
tenduke::TimedOutwhen concurrent access times out
tenduke::http::HTTPRequestExceptionif the HTTP-status code indicates error
tenduke::http::HTTPExceptionin other HTTP-related issues
tenduke::net::NetworkingExceptione.g. host not found, network connection issues

Implemented in tenduke::oidc::OIDCSessionImpl, and tenduke::oidc::SerializedOIDCSession.

◆ invalidate()

virtual void tenduke::oidc::OIDCSession::invalidate ( )
pure virtual

Invalidates the session.

Exceptions
tenduke::TimedOutwhen concurrent access times out

Implemented in tenduke::oidc::OIDCSessionImpl, and tenduke::oidc::SerializedOIDCSession.

◆ isValid()

virtual bool tenduke::oidc::OIDCSession::isValid ( )
pure virtual

Checks that local session is valid.

This method checks that there is a session and it has not expired.

Note that this method only checks the local session information, it does not verify the state from the backend. This means that requests using the access token might fail even if this method returns true, because .e.g.

  • The state might have expired in the backend, but the client believes that the session is valid, because there is a clock skew or some other inaccuracy
  • The state might have been invalidated in the backend (e.g. by admin user)
Returns
-
Exceptions
tenduke::TimedOutwhen concurrent access times out

Implemented in tenduke::oidc::IdTokenSession, tenduke::oidc::OIDCSessionImpl, and tenduke::oidc::SerializedOIDCSession.

◆ reEstablish()

virtual void tenduke::oidc::OIDCSession::reEstablish ( )
pure virtual

Re-establishes the session: Tries first to refresh the state, if it fails, re-authenticates the user.

IMPORTANT: Do not call this method "just in case". Read the class documentation and heartbeat().

Exceptions
tenduke::TimedOutwhen concurrent access times out

Implemented in tenduke::oidc::OIDCSessionImpl, and tenduke::oidc::SerializedOIDCSession.

◆ refresh()

virtual void tenduke::oidc::OIDCSession::refresh ( )
pure virtual

Forces refresh of the session.

Does nothing if a) there is no session or b) the session is not refreshable.

IMPORTANT: Do not call this unless you really know what you are doing. Use ensureValidSession() instead. This method only does refresh, it never logs in.

Exceptions
tenduke::TimedOutwhen concurrent access times out

Implemented in tenduke::oidc::OIDCSessionImpl, and tenduke::oidc::SerializedOIDCSession.


The documentation for this class was generated from the following file: