http_session:http_close

/usr/lib/swipl/library/http/http_session.pl

library
- http

http_close_session(+SessionID) is det

Closes an HTTP session. This predicate can be called from any thread to terminate a session. It uses the broadcast/1 service with the message below.

http_session(end(SessionId, Peer))

The broadcast is done before the session data is destroyed and the listen-handlers are executed in context of the session that is being closed. Here is an example that destroys a Prolog thread that is associated to a thread:

:- listen(http_session(end(SessionId, _Peer)),
          kill_session_thread(SessionID)).

kill_session_thread(SessionID) :-
        http_session_data(thread(ThreadID)),
        thread_signal(ThreadID, throw(session_closed)).

Succeed without any effect if SessionID does not refer to an active session.

If http_close_session/1 is called from a handler operating in the current session and the CGI stream is still in state header, this predicate emits a Set-Cookie to expire the cookie.

Errors: - type_error(atom, SessionID)
See also: - listen/2 for acting upon closed sessions