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[SESSION] Implement SessionHandlerInterface instead of setting custom handlers by XRevan86

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This commit is contained in:
Diogo Cordeiro 2019-05-14 22:57:45 +01:00
parent e8783d46d0
commit c083a8bcc2
3 changed files with 224 additions and 229 deletions
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226
classes/Session.php
View File

@ -28,7 +28,7 @@ require_once INSTALLDIR . '/classes/Memcached_DataObject.php';
/**
* Table definition for Session
*
* Superclass representing a saved session as it exists in the database and the associated interfaces.
* Superclass representing a saved session as it exists in the database.
*
* @author GNU social
*/
@ -64,228 +64,4 @@ class Session extends Managed_DataObject
],
];
}
/**
* A helper function to print a session-related message to the debug log if
* the site session debug configuration option is enabled.
* @param $msg
* @return void
*/
public static function logdeb($msg)
{
if (common_config('sessions', 'debug')) {
common_debug("Session: " . $msg);
}
}
/**
* Dummy option for saving to file needed for full PHP adherence.
*
* @param $save_path
* @param $session_name
* @return bool true
*/
public static function open($save_path, $session_name)
{
return true;
}
/**
* Dummy option for saving to file needed for full PHP adherence.
*
* @return bool true
*/
public static function close()
{
return true;
}
/**
* Fetch the session data for the session with the given $id.
*
* @param $id
* @return string Returns an encoded string of the read data. If nothing was read, it must return an empty string. Note this value is returned internally to PHP for processing.
*/
public static function read($id)
{
self::logdeb("Fetching session '$id'");
$session = Session::getKV('id', $id);
if (empty($session)) {
self::logdeb("Couldn't find '$id'");
return '';
} else {
self::logdeb("Found '$id', returning " .
strlen($session->session_data) .
" chars of data");
return (string)$session->session_data;
}
}
/**
* Write the session data for session with given $id as $session_data.
*
* @param $id
* @param $session_data
* @return bool Returns TRUE on success or FALSE on failure.
*/
public static function write($id, $session_data)
{
self::logdeb("Writing session '$id'");
$session = Session::getKV('id', $id);
if (empty($session)) {
self::logdeb("'$id' doesn't yet exist; inserting.");
$session = new Session();
$session->id = $id;
$session->session_data = $session_data;
$session->created = common_sql_now();
$result = $session->insert();
if (!$result) {
common_log_db_error($session, 'INSERT', __FILE__);
self::logdeb("Failed to insert '$id'.");
} else {
self::logdeb("Successfully inserted '$id' (result = $result).");
}
return (bool) $result;
} else {
self::logdeb("'$id' already exists; updating.");
if (strcmp($session->session_data, $session_data) == 0) {
self::logdeb("Not writing session '$id'; unchanged");
return true;
} else {
self::logdeb("Session '$id' data changed; updating");
$orig = clone($session);
$session->session_data = $session_data;
$result = $session->update($orig);
if (!$result) {
common_log_db_error($session, 'UPDATE', __FILE__);
self::logdeb("Failed to update '$id'.");
} else {
self::logdeb("Successfully updated '$id' (result = $result).");
}
return (bool) $result;
}
}
}
/**
* Find sessions that have persisted beyond $maxlifetime and delete them.
* This will be limited by config['sessions']['gc_limit'] - it won't delete
* more than the number of sessions specified there at a single pass.
*
* @param $maxlifetime
* @return bool Returns TRUE on success or FALSE on failure.
*/
public static function gc($maxlifetime)
{
self::logdeb("garbage collection (maxlifetime = $maxlifetime)");
$epoch = common_sql_date(time() - $maxlifetime);
$ids = [];
$session = new Session();
$session->whereAdd('modified < "' . $epoch . '"');
$session->selectAdd();
$session->selectAdd('id');
$limit = common_config('sessions', 'gc_limit');
if ($limit > 0) {
// On large sites, too many sessions to expire
// at once will just result in failure.
$session->limit($limit);
}
$session->find();
while ($session->fetch()) {
$ids[] = $session->id;
}
$session->free();
self::logdeb("Found " . count($ids) . " ids to delete.");
foreach ($ids as $id) {
self::logdeb("Destroying session '$id'.");
self::destroy($id);
}
return true;
}
/**
* Deletes session with given id $id.
*
* @param $id
* @return bool Returns TRUE on success or FALSE on failure.
*/
public static function destroy($id)
{
self::logdeb("Deleting session $id");
$session = Session::getKV('id', $id);
if (empty($session)) {
self::logdeb("Can't find '$id' to delete.");
return false;
} else {
$result = $session->delete();
if (!$result) {
common_log_db_error($session, 'DELETE', __FILE__);
self::logdeb("Failed to delete '$id'.");
} else {
self::logdeb("Successfully deleted '$id' (result = $result).");
}
return (bool) $result;
}
}
/**
* Set our session handler as the handler for PHP session handling in the context of GNU social.
*
* @return bool Returns TRUE on success or FALSE on failure.
*/
public static function setSaveHandler()
{
self::logdeb("setting save handlers");
$result = session_set_save_handler(
'Session::open',
'Session::close',
'Session::read',
'Session::write',
'Session::destroy',
'Session::gc'
);
self::logdeb("save handlers result = $result");
// PHP 5.3 with APC ends up destroying a bunch of object stuff before the session
// save handlers get called on request teardown.
// Registering an explicit shutdown function should take care of this before
// everything breaks on us.
register_shutdown_function('Session::cleanup');
return $result;
}
/**
* Stuff to do before the request teardown.
*
* @return void
*/
public static function cleanup()
{
session_write_close();
}
}

219
lib/internalsessionhandler.php Normal file
View File

@ -0,0 +1,219 @@
<?php
/**
* GNU social's implementation of SessionHandler
*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2009, StatusNet, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
if (!defined('GNUSOCIAL')) {
exit(1);
}
/**
* Superclass representing the associated interfaces of session handling.
*
* @author GNU social
*/
class InternalSessionHandler implements SessionHandlerInterface
{
/**
* A helper function to print a session-related message to the debug log if
* the site session debug configuration option is enabled.
* @param $msg
* @return void
*/
public static function logdeb($msg)
{
if (common_config('sessions', 'debug')) {
common_debug("Session: " . $msg);
}
}
/**
* Dummy option for saving to file needed for full PHP adherence.
*
* @param $save_path
* @param $session_name
* @return bool true
*/
public function open($save_path, $session_name)
{
return true;
}
/**
* Dummy option for saving to file needed for full PHP adherence.
*
* @return bool true
*/
public function close()
{
return true;
}
/**
* Fetch the session data for the session with the given $id.
*
* @param $id
* @return string Returns an encoded string of the read data. If nothing was read, it must return an empty string. Note this value is returned internally to PHP for processing.
*/
public function read($id)
{
self::logdeb("Fetching session '$id'");
$session = Session::getKV('id', $id);
if (empty($session)) {
self::logdeb("Couldn't find '$id'");
return '';
} else {
self::logdeb("Found '$id', returning " .
strlen($session->session_data) .
" chars of data");
return (string)$session->session_data;
}
}
/**
* Write the session data for session with given $id as $session_data.
*
* @param $id
* @param $session_data
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function write($id, $session_data)
{
self::logdeb("Writing session '$id'");
$session = Session::getKV('id', $id);
if (empty($session)) {
self::logdeb("'$id' doesn't yet exist; inserting.");
$session = new Session();
$session->id = $id;
$session->session_data = $session_data;
$session->created = common_sql_now();
$result = $session->insert();
if (!$result) {
common_log_db_error($session, 'INSERT', __FILE__);
self::logdeb("Failed to insert '$id'.");
} else {
self::logdeb("Successfully inserted '$id' (result = $result).");
}
return (bool) $result;
} else {
self::logdeb("'$id' already exists; updating.");
if (strcmp($session->session_data, $session_data) == 0) {
self::logdeb("Not writing session '$id'; unchanged");
return true;
} else {
self::logdeb("Session '$id' data changed; updating");
$orig = clone($session);
$session->session_data = $session_data;
$result = $session->update($orig);
if (!$result) {
common_log_db_error($session, 'UPDATE', __FILE__);
self::logdeb("Failed to update '$id'.");
} else {
self::logdeb("Successfully updated '$id' (result = $result).");
}
return (bool) $result;
}
}
}
/**
* Find sessions that have persisted beyond $maxlifetime and delete them.
* This will be limited by config['sessions']['gc_limit'] - it won't delete
* more than the number of sessions specified there at a single pass.
*
* @param $maxlifetime
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function gc($maxlifetime)
{
self::logdeb("garbage collection (maxlifetime = $maxlifetime)");
$epoch = common_sql_date(time() - $maxlifetime);
$ids = [];
$session = new Session();
$session->whereAdd('modified < "' . $epoch . '"');
$session->selectAdd();
$session->selectAdd('id');
$limit = common_config('sessions', 'gc_limit');
if ($limit > 0) {
// On large sites, too many sessions to expire
// at once will just result in failure.
$session->limit($limit);
}
$session->find();
while ($session->fetch()) {
$ids[] = $session->id;
}
$session->free();
self::logdeb("Found " . count($ids) . " ids to delete.");
foreach ($ids as $id) {
self::logdeb("Destroying session '$id'.");
self::destroy($id);
}
return true;
}
/**
* Deletes session with given id $id.
*
* @param $id
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function destroy($id)
{
self::logdeb("Deleting session $id");
$session = Session::getKV('id', $id);
if (empty($session)) {
self::logdeb("Can't find '$id' to delete.");
return false;
} else {
$result = $session->delete();
if (!$result) {
common_log_db_error($session, 'DELETE', __FILE__);
self::logdeb("Failed to delete '$id'.");
} else {
self::logdeb("Successfully deleted '$id' (result = $result).");
}
return (bool) $result;
}
}
}

2
lib/util.php
View File

@ -283,7 +283,7 @@ function common_ensure_session()
}
if (!common_have_session()) {
if (common_config('sessions', 'handle')) {
Session::setSaveHandler();
session_set_save_handler(new InternalSessionHandler(), true);
}
if (array_key_exists(session_name(), $_GET)) {
$id = $_GET[session_name()];