X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=include%2Fsession.php;h=8aca6cb53d356c37d294e14d8d0e968f93c7021c;hb=63610c7b73fcaf862adbf880d4968dd2b1678d9b;hp=6632b7e89a06be014a37dd953eaa51b70eddedae;hpb=13fea42d8cb9c9fb479f5965b842ae5f7cf484f0;p=friendica.git

diff --git a/include/session.php b/include/session.php
index 6632b7e89a..8aca6cb53d 100644
--- a/include/session.php
+++ b/include/session.php
@@ -1,70 +1,111 @@
 <?php
-
 // Session management functions. These provide database storage of PHP
 // session info.
 
+require_once('include/cache.php');
+
 $session_exists = 0;
 $session_expire = 180000;
 
-if(! function_exists('ref_session_open')) {
-function ref_session_open ($s,$n) {
-  return true;
-}}
-
-if(! function_exists('ref_session_read')) {
-function ref_session_read ($id) {
-  global $session_exists;
-  if(x($id))
-    $r = q("SELECT `data` FROM `session` WHERE `sid`= '%s'", dbesc($id));
-  if(count($r)) {
-    $session_exists = true;
-    return $r[0]['data'];
-  } else {
-    logger("no data for session $id", LOGGER_TRACE);
-  }
-  return '';
-}}
-
-if(! function_exists('ref_session_write')) {
-function ref_session_write ($id,$data) {
-  global $session_exists, $session_expire;
-  if(! $id || ! $data) {
-    return false;
-  }
-
-  $expire = time() + $session_expire;
-  $default_expire = time() + 300;
-
-  if($session_exists)
-    $r = q("UPDATE `session`
-            SET `data` = '%s', `expire` = '%s'
-            WHERE `sid` = '%s'",
-            dbesc($data), dbesc($expire), dbesc($id));
-  else
-    $r = q("INSERT INTO `session`
-            SET `sid` = '%s', `expire` = '%s', `data` = '%s'",
-            dbesc($id), dbesc($default_expire), dbesc($data));
-
-  return true;
-}}
-
-if(! function_exists('ref_session_close')) {
+function ref_session_open($s, $n) {
+	return true;
+}
+
+function ref_session_read($id) {
+	global $session_exists;
+
+	if (!x($id)) {
+		return '';
+	}
+
+	$memcache = cache::memcache();
+	if (is_object($memcache)) {
+		$data = $memcache->get(get_app()->get_hostname().":session:".$id);
+		if (!is_bool($data)) {
+			return $data;
+		}
+		logger("no data for session $id", LOGGER_TRACE);
+		return '';
+	}
+
+	$r = q("SELECT `data` FROM `session` WHERE `sid`= '%s'", dbesc($id));
+
+	if(dbm::is_result($r)) {
+		$session_exists = true;
+		return $r[0]['data'];
+	} else {
+		logger("no data for session $id", LOGGER_TRACE);
+	}
+
+	return '';
+}
+
+/**
+ * @brief Standard PHP session write callback
+ *
+ * This callback updates the DB-stored session data and/or the expiration depending
+ * on the case. Uses the $session_expire global for existing session, 5 minutes
+ * for newly created session.
+ *
+ * @global bool $session_exists Whether a session with the given id already exists
+ * @global int $session_expire Session expiration delay in seconds
+ * @param string $id Session ID with format: [a-z0-9]{26}
+ * @param string $data Serialized session data
+ * @return boolean Returns false if parameters are missing, true otherwise
+ */
+function ref_session_write($id, $data) {
+	global $session_exists, $session_expire;
+
+	if (!$id || !$data) {
+		return false;
+	}
+
+	$expire = time() + $session_expire;
+	$default_expire = time() + 300;
+
+	$memcache = cache::memcache();
+	if (is_object($memcache)) {
+		$memcache->set(get_app()->get_hostname().":session:".$id, $data, MEMCACHE_COMPRESSED, $expire);
+		return true;
+	}
+
+	if ($session_exists) {
+		$r = q("UPDATE `session`
+				SET `data` = '%s', `expire` = '%s'
+				WHERE `sid` = '%s'
+				AND (`data` != '%s' OR `expire` != '%s')",
+				dbesc($data), dbesc($expire), dbesc($id), dbesc($data), dbesc($expire));
+	} else {
+		$r = q("INSERT INTO `session`
+				SET `sid` = '%s', `expire` = '%s', `data` = '%s'",
+				dbesc($id), dbesc($default_expire), dbesc($data));
+	}
+
+	return true;
+}
+
 function ref_session_close() {
-  return true;
-}}
+	return true;
+}
 
-if(! function_exists('ref_session_destroy')) {
-function ref_session_destroy ($id) {
-  q("DELETE FROM `session` WHERE `sid` = '%s'", dbesc($id));
-  return true;
-}}
+function ref_session_destroy($id) {
+	$memcache = cache::memcache();
+
+	if (is_object($memcache)) {
+		$memcache->delete(get_app()->get_hostname().":session:".$id);
+		return true;
+	}
+
+	q("DELETE FROM `session` WHERE `sid` = '%s'", dbesc($id));
+
+	return true;
+}
 
-if(! function_exists('ref_session_gc')) {
 function ref_session_gc($expire) {
-  q("DELETE FROM `session` WHERE `expire` < %d", dbesc(time()));
-  q("OPTIMIZE TABLE `sess_data`");
-  return true;
-}}
+	q("DELETE FROM `session` WHERE `expire` < %d", dbesc(time()));
+
+	return true;
+}
 
 $gc_probability = 50;
 
@@ -72,7 +113,8 @@ ini_set('session.gc_probability', $gc_probability);
 ini_set('session.use_only_cookies', 1);
 ini_set('session.cookie_httponly', 1);
 
-
-session_set_save_handler ('ref_session_open', 'ref_session_close',
-                            'ref_session_read', 'ref_session_write',
-                            'ref_session_destroy', 'ref_session_gc');
+if (!get_config('system', 'disable_database_session')) {
+	session_set_save_handler('ref_session_open', 'ref_session_close',
+				'ref_session_read', 'ref_session_write',
+				'ref_session_destroy', 'ref_session_gc');
+}