This patch moves existing scanning functionality to plugin level. It does
not add anything new, just refactors the existing functionality.
AMOS BEGIN
MOV [clamemailsubject,core],[emailsubject,antivirus]
MOV [clamfailed,core],[clamfailed,antivirus_clamav]
MOV [clamlost,core],[invalidpathtoclam,antivirus_clamav]
MOV [clamunknownerror,core],[unknownerror,antivirus_clamav]
MOV [virusfounduser,core],[virusfounduser,antivirus]
AMOS END
The repository API defaults has a function, prepare_file, which is
responsible for creating a unique file to be used during the current
request.
This is usually used in the repository's get_file() function to store the
file before it is used elsewhere in the API to save the file to the
filestorage API.
It is also sometimes used to temporarily store credentials for the lifetime
of the session.
In all cases, this file is only expected to exist for the duration of the
session.
Switching to use of a per-request directory using make_request_directory()
ensures that the tempdir does not grow without control.
This commit also adds an upgrade step to remove all old temp directories
created by any repository currently installed.
Function repository::get_moodle_file() should always be called on packed reference and not on the source received from user.
Also added phpdocs to some other methods that were confusing source and reference
Too many functions, too different parameters, unnecessary DB queries.
All repositories developed for Moodle 2.3-2.5 will continue to work.
Also get rid of DB field files_reference.lifetime, it is not used by
anybody except repository itself.
List of changes:
* New OOP API using PHP namespace \core\session\.
* All handlers now update the sessions table consistently.
* Experimental DB session support in Oracle.
* Full support for session file handler (filesystem locking required).
* New option for alternative session directory.
* Official memcached session handler support.
* Workaround for memcached version with non-functional gc.
* Improved security - forced session id regeneration.
* Improved compatibility with recent PHP releases.
* Fixed borked CSS during install in debug mode.
* Switched to file based sessions in new installs.
* DB session setting disappears if DB does not support sessions.
* DB session setting disappears if session handler specified in config.php.
* Fast purging of sessions used in request only.
* No legacy distinction - file, database and memcached support the same functionality.
* Session handler name included in performance info.
* Fixed user_loggedin and user_loggedout event triggering.
* Other minor bugfixing and improvements.
* Fixed database session segfault if MUC disposed before $DB.
Limitations:
* Session access time is now updated right after session start.
* Support for $CFG->sessionlockloggedinonly was removed.
* First request does not update userid in sessions table.
* The timeouts may break badly if server hosting forces PHP.ini session settings.
* The session GC is a lot slower, we do not rely on external session timeouts.
* There cannot be any hooks triggered at the session write time.
* File and memcached handlers do not support session lock acquire timeouts.
* Some low level PHP session functions can not be used directly in Moodle code.
Previously, even when a specific setting had to be returned, this method
would return an empty array. Now, the behaviour is the same whether
some options or none are set: if the requested setting is not found
null is returned.
Use --fdpass parameter that passes the file descriptor permissions to clamd,
which allows to scan given file irrespective of directory and file
permissions. Changing file permissions is not required.
