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implement expiration time for Api\Cache::(g|s)etSession()

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This commit is contained in:
Ralf Becker 2017-07-24 17:03:43 +02:00
parent c03211180d
commit c6bf51180f
1 changed files with 25 additions and 3 deletions
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28
api/src/Cache.php
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@ -31,7 +31,7 @@ namespace EGroupware\Api;
* and it's value is stored in the cache AND retured
* 4. parameters to pass to the callback as array, see call_user_func_array
* 5. an expiration time in seconds to specify how long data should be cached,
* default 0 means infinit (this time is not garantied and not supported for all levels!)
* default 0 means infinit (this time is not supported for request level!)
*
* Data is stored under an application name and a location, like egw_session::appsession().
* In fact data stored at cache level Api\Cache::SESSION, is stored in the same way as
@ -357,6 +357,11 @@ class Cache
return self::unsetCache(self::INSTANCE,$app,$location);
}
/**
* Prefix for appname to store expiration time in session cache
*/
const SESSION_EXPIRATION_PREFIX = '*expiration*';
/**
* Set some data in the cache for the whole source tree (all instances)
*
@ -368,7 +373,6 @@ class Cache
*/
static public function setSession($app,$location,$data,$expiration=0)
{
unset($expiration); // not used, but required by function signature
if (isset($_SESSION[Session::EGW_SESSION_ENCRYPTED]))
{
if (Session::ERROR_LOG_DEBUG) error_log(__METHOD__.' called after session was encrypted --> ignored!');
@ -376,6 +380,11 @@ class Cache
}
$_SESSION[Session::EGW_APPSESSION_VAR][$app][$location] = $data;
if ($expiration > 0)
{
$_SESSION[Session::EGW_APPSESSION_VAR][self::SESSION_EXPIRATION_PREFIX.$app][$location] = time()+$expiration;
}
return true;
}
@ -393,12 +402,18 @@ class Cache
*/
static public function &getSession($app,$location,$callback=null,array $callback_params=array(),$expiration=0)
{
unset($expiration); // not used, but required by function signature
if (isset($_SESSION[Session::EGW_SESSION_ENCRYPTED]))
{
if (Session::ERROR_LOG_DEBUG) error_log(__METHOD__.' called after session was encrypted --> ignored!');
return null; // can no longer store something in the session, eg. because commit_session() was called
}
// check if entry is expired and clean it up in that case
if (isset($_SESSION[Session::EGW_APPSESSION_VAR][self::SESSION_EXPIRATION_PREFIX.$app][$location]) &&
$_SESSION[Session::EGW_APPSESSION_VAR][self::SESSION_EXPIRATION_PREFIX.$app][$location] < time())
{
unset($_SESSION[Session::EGW_APPSESSION_VAR][$app][$location],
$_SESSION[Session::EGW_APPSESSION_VAR][self::SESSION_EXPIRATION_PREFIX.$app][$location]);
}
if (!isset($_SESSION[Session::EGW_APPSESSION_VAR][$app][$location]) && !is_null($callback))
{
$_SESSION[Session::EGW_APPSESSION_VAR][$app][$location] = call_user_func_array($callback,$callback_params);
@ -420,6 +435,13 @@ class Cache
if (Session::ERROR_LOG_DEBUG) error_log(__METHOD__.' called after session was encrypted --> ignored!');
return false; // can no longer store something in the session, eg. because commit_session() was called
}
// check if entry is expired and clean it up in that case
if (isset($_SESSION[Session::EGW_APPSESSION_VAR][self::SESSION_EXPIRATION_PREFIX.$app][$location]) &&
$_SESSION[Session::EGW_APPSESSION_VAR][self::SESSION_EXPIRATION_PREFIX.$app][$location] < time())
{
unset($_SESSION[Session::EGW_APPSESSION_VAR][$app][$location],
$_SESSION[Session::EGW_APPSESSION_VAR][self::SESSION_EXPIRATION_PREFIX.$app][$location]);
}
if (!isset($_SESSION[Session::EGW_APPSESSION_VAR][$app][$location]))
{
return false;