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egroupware_official/phpgwapi/inc/adodb/session/adodb-session.php

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<?php
// $CVSHeader$
/*
V4.01 23 Oct 2003 (c) 2000-2004 John Lim (jlim@natsoft.com.my). All rights reserved.
Contributed by Ross Smith (adodb@netebb.com).
Released under both BSD license and Lesser GPL library license.
Whenever there is any discrepancy between the two licenses,
the BSD license will take precedence.
Set tabs to 4 for best viewing.
*/
/*
You may want to rename the 'data' field to 'session_data' as
'data' appears to be a reserved word for one or more of the following:
ANSI SQL
IBM DB2
MS SQL Server
Postgres
SAP
If you do, then execute:
ADODB_Session::dataFieldName('session_data');
*/
if (!defined('_ADODB_LAYER')) {
require_once realpath(dirname(__FILE__) . '/../adodb.inc.php');
}
if (defined('ADODB_SESSION')) return 1;
define('ADODB_SESSION', dirname(__FILE__));
/*!
\static
*/
class ADODB_Session {
/////////////////////
// getter/setter methods
/////////////////////
/*!
*/
function driver($driver = null) {
static $_driver = 'mysql';
static $set = false;
if (!is_null($driver)) {
$_driver = trim($driver);
$set = true;
} elseif (!$set) {
// backwards compatibility
if (isset($GLOBALS['ADODB_SESSION_DRIVER'])) {
return $GLOBALS['ADODB_SESSION_DRIVER'];
}
}
return $_driver;
}
/*!
*/
function host($host = null) {
static $_host = 'localhost';
static $set = false;
if (!is_null($host)) {
$_host = trim($host);
$set = true;
} elseif (!$set) {
// backwards compatibility
if (isset($GLOBALS['ADODB_SESSION_CONNECT'])) {
return $GLOBALS['ADODB_SESSION_CONNECT'];
}
}
return $_host;
}
/*!
*/
function user($user = null) {
static $_user = 'root';
static $set = false;
if (!is_null($user)) {
$_user = trim($user);
$set = true;
} elseif (!$set) {
// backwards compatibility
if (isset($GLOBALS['ADODB_SESSION_USER'])) {
return $GLOBALS['ADODB_SESSION_USER'];
}
}
return $_user;
}
/*!
*/
function password($password = null) {
static $_password = '';
static $set = false;
if (!is_null($password)) {
$_password = $password;
$set = true;
} elseif (!$set) {
// backwards compatibility
if (isset($GLOBALS['ADODB_SESSION_PWD'])) {
return $GLOBALS['ADODB_SESSION_PWD'];
}
}
return $_password;
}
/*!
*/
function database($database = null) {
static $_database = 'xphplens_2';
static $set = false;
if (!is_null($database)) {
$_database = trim($database);
$set = true;
} elseif (!$set) {
// backwards compatibility
if (isset($GLOBALS['ADODB_SESSION_DB'])) {
return $GLOBALS['ADODB_SESSION_DB'];
}
}
return $_database;
}
/*!
*/
function persist($persist = null) {
static $_persist = true;
if (!is_null($persist)) {
$_persist = trim($persist);
}
return $_persist;
}
/*!
*/
function lifetime($lifetime = null) {
static $_lifetime;
static $set = false;
if (!is_null($lifetime)) {
$_lifetime = (int) $lifetime;
$set = true;
} elseif (!$set) {
// backwards compatibility
if (isset($GLOBALS['ADODB_SESS_LIFE'])) {
return $GLOBALS['ADODB_SESS_LIFE'];
}
}
if (!$_lifetime) {
$_lifetime = ini_get('session.gc_maxlifetime');
if ($_lifetime <= 1) {
// bug in PHP 4.0.3 pl 1 -- how about other versions?
//print "<h3>Session Error: PHP.INI setting <i>session.gc_maxlifetime</i>not set: $lifetime</h3>";
$_lifetime = 1440;
}
}
return $_lifetime;
}
/*!
*/
function debug($debug = null) {
static $_debug = false;
static $set = false;
if (!is_null($debug)) {
$_debug = (bool) $debug;
$conn = ADODB_Session::_conn();
if ($conn) {
$conn->debug = $_debug;
}
$set = true;
} elseif (!$set) {
// backwards compatibility
if (isset($GLOBALS['ADODB_SESS_DEBUG'])) {
return $GLOBALS['ADODB_SESS_DEBUG'];
}
}
return $_debug;
}
/*!
*/
function expireNotify($expire_notify = null) {
static $_expire_notify;
static $set = false;
if (!is_null($expire_notify)) {
$_expire_notify = $expire_notify;
$set = true;
} elseif (!$set) {
// backwards compatibility
if (isset($GLOBALS['ADODB_SESSION_EXPIRE_NOTIFY'])) {
return $GLOBALS['ADODB_SESSION_EXPIRE_NOTIFY'];
}
}
return $_expire_notify;
}
/*!
*/
function table($table = null) {
static $_table = 'sessions';
static $set = false;
if (!is_null($table)) {
$_table = trim($table);
$set = true;
} elseif (!$set) {
// backwards compatibility
if (isset($GLOBALS['ADODB_SESSION_TBL'])) {
return $GLOBALS['ADODB_SESSION_TBL'];
}
}
return $_table;
}
/*!
*/
function optimize($optimize = null) {
static $_optimize = false;
static $set = false;
if (!is_null($optimize)) {
$_optimize = (bool) $optimize;
$set = true;
} elseif (!$set) {
// backwards compatibility
if (defined('ADODB_SESSION_OPTIMIZE')) {
return true;
}
}
return $_optimize;
}
/*!
*/
function syncSeconds($sync_seconds = null) {
static $_sync_seconds = 60;
static $set = false;
if (!is_null($sync_seconds)) {
$_sync_seconds = (int) $sync_seconds;
$set = true;
} elseif (!$set) {
// backwards compatibility
if (defined('ADODB_SESSION_SYNCH_SECS')) {
return ADODB_SESSION_SYNCH_SECS;
}
}
return $_sync_seconds;
}
/*!
*/
function clob($clob = null) {
static $_clob = false;
static $set = false;
if (!is_null($clob)) {
$_clob = strtolower(trim($clob));
$set = true;
} elseif (!$set) {
// backwards compatibility
if (isset($GLOBALS['ADODB_SESSION_USE_LOBS'])) {
return $GLOBALS['ADODB_SESSION_USE_LOBS'];
}
}
return $_clob;
}
/*!
*/
function dataFieldName($data_field_name = null) {
static $_data_field_name = 'data';
if (!is_null($data_field_name)) {
$_data_field_name = trim($data_field_name);
}
return $_data_field_name;
}
/*!
*/
function filter($filter = null) {
static $_filter = array();
if (!is_null($filter)) {
if (!is_array($filter)) {
$filter = array($filter);
}
$_filter = $filter;
}
return $_filter;
}
/*!
*/
function encryptionKey($encryption_key = null) {
static $_encryption_key = 'CRYPTED ADODB SESSIONS ROCK!';
if (!is_null($encryption_key)) {
$_encryption_key = $encryption_key;
}
return $_encryption_key;
}
/////////////////////
// private methods
/////////////////////
/*!
*/
function &_conn($conn=null) {
return $GLOBALS['ADODB_SESS_CONN'];
}
/*!
*/
function _crc($crc = null) {
static $_crc = false;
if (!is_null($crc)) {
$_crc = $crc;
}
return $_crc;
}
/*!
*/
function _init() {
session_module_name('user');
session_set_save_handler(
array('ADODB_Session', 'open'),
array('ADODB_Session', 'close'),
array('ADODB_Session', 'read'),
array('ADODB_Session', 'write'),
array('ADODB_Session', 'destroy'),
array('ADODB_Session', 'gc')
);
}
/*!
*/
function _sessionKey() {
// use this function to create the encryption key for crypted sessions
// crypt the used key, ADODB_Session::encryptionKey() as key and session_id() as salt
return crypt(ADODB_Session::encryptionKey(), session_id());
}
/*!
*/
function _dumprs($rs) {
$conn =& ADODB_Session::_conn();
$debug = ADODB_Session::debug();
if (!$conn) {
return;
}
if (!$debug) {
return;
}
if (!$rs) {
echo "<br />\$rs is null or false<br />\n";
return;
}
//echo "<br />\nAffected_Rows=",$conn->Affected_Rows(),"<br />\n";
if (!is_object($rs)) {
return;
}
require_once ADODB_SESSION.'/../tohtml.inc.php';
rs2html($rs);
}
/////////////////////
// public methods
/////////////////////
/*!
Create the connection to the database.
If $conn already exists, reuse that connection
*/
function open($save_path, $session_name, $persist = null) {
$conn =& ADODB_Session::_conn();
if ($conn) {
return true;
}
$database = ADODB_Session::database();
$debug = ADODB_Session::debug();
$driver = ADODB_Session::driver();
$host = ADODB_Session::host();
$password = ADODB_Session::password();
$user = ADODB_Session::user();
if (!is_null($persist)) {
$persist = (bool) $persist;
ADODB_Session::persist($persist);
} else {
$persist = ADODB_Session::persist();
}
# these can all be defaulted to in php.ini
# assert('$database');
# assert('$driver');
# assert('$host');
// cannot use =& below - do not know why...
$conn = ADONewConnection($driver);
if ($debug) {
$conn->debug = true;
// ADOConnection::outp( " driver=$driver user=$user pwd=$password db=$database ");
}
if ($persist) {
$ok = $conn->PConnect($host, $user, $password, $database);
} else {
$ok = $conn->Connect($host, $user, $password, $database);
}
if ($ok) $GLOBALS['ADODB_SESS_CONN'] =& $conn;
else
ADOConnection::outp('<p>Session: connection failed</p>', false);
return $ok;
}
/*!
Close the connection
*/
function close() {
$conn =& ADODB_Session::_conn();
if ($conn) {
$conn->Close();
}
return true;
}
/*
Slurp in the session variables and return the serialized string
*/
function read($key) {
$conn =& ADODB_Session::_conn();
$data = ADODB_Session::dataFieldName();
$filter = ADODB_Session::filter();
$table = ADODB_Session::table();
if (!$conn) {
return '';
}
assert('$table');
$qkey = $conn->quote($key);
$binary = $conn->dataProvider === 'mysql' ? '/*! BINARY */' : '';
$sql = "SELECT $data FROM $table WHERE $binary sesskey = $qkey AND expiry >= " . time();
$rs =& $conn->Execute($sql);
//ADODB_Session::_dumprs($rs);
if ($rs) {
if ($rs->EOF) {
$v = '';
} else {
$v = reset($rs->fields);
$filter = array_reverse($filter);
foreach ($filter as $f) {
if (is_object($f)) {
$v = $f->read($v, ADODB_Session::_sessionKey());
}
}
$v = rawurldecode($v);
}
$rs->Close();
ADODB_Session::_crc(strlen($v) . crc32($v));
return $v;
}
return '';
}
/*!
Write the serialized data to a database.
If the data has not been modified since the last read(), we do not write.
*/
function write($key, $val) {
$clob = ADODB_Session::clob();
$conn =& ADODB_Session::_conn();
$crc = ADODB_Session::_crc();
$data = ADODB_Session::dataFieldName();
$debug = ADODB_Session::debug();
$driver = ADODB_Session::driver();
$expire_notify = ADODB_Session::expireNotify();
$filter = ADODB_Session::filter();
$lifetime = ADODB_Session::lifetime();
$table = ADODB_Session::table();
if (!$conn) {
return false;
}
assert('$table');
$expiry = time() + $lifetime;
$qkey = $conn->quote($key);
$binary = $conn->dataProvider === 'mysql' ? '/*! BINARY */' : '';
// crc32 optimization since adodb 2.1
// now we only update expiry date, thx to sebastian thom in adodb 2.32
if ($crc !== false && $crc == (strlen($val) . crc32($val))) {
if ($debug) {
echo '<p>Session: Only updating date - crc32 not changed</p>';
}
$sql = "UPDATE $table SET expiry = $expiry WHERE $binary sesskey = $qkey AND expiry >= " . time();
$rs =& $conn->Execute($sql);
ADODB_Session::_dumprs($rs);
if ($rs) {
$rs->Close();
}
return true;
}
$val = rawurlencode($val);
foreach ($filter as $f) {
if (is_object($f)) {
$val = $f->write($val, ADODB_Session::_sessionKey());
}
}
$arr = array('sesskey' => $key, 'expiry' => $expiry, $data => $val, 'expireref' => '');
if ($expire_notify) {
$var = reset($expire_notify);
global $$var;
if (isset($$var)) {
$arr['expireref'] = $$var;
}
}
if (!$clob) { // no lobs, simply use replace()
$arr[$data] = $conn->qstr($val);
$rs = $conn->Replace($table, $arr, 'sesskey', $autoQuote = true);
ADODB_Session::_dumprs($rs);
} else {
// what value shall we insert/update for lob row?
switch ($driver) {
// empty_clob or empty_lob for oracle dbs
case 'oracle':
case 'oci8':
case 'oci8po':
case 'oci805':
$lob_value = sprintf('empty_%s()', strtolower($clob));
break;
// null for all other
default:
$lob_value = 'null';
break;
}
// do we insert or update? => as for sesskey
$rs =& $conn->Execute("SELECT COUNT(*) AS cnt FROM $table WHERE $binary sesskey = $qkey");
ADODB_Session::_dumprs($rs);
if ($rs && reset($rs->fields) > 0) {
$sql = "UPDATE $table SET expiry = $expiry, $data = $lob_value WHERE sesskey = $qkey";
} else {
$sql = "INSERT INTO $table (expiry, $data, sesskey) VALUES ($expiry, $lob_value, $qkey)";
}
if ($rs) {
$rs->Close();
}
$err = '';
$rs1 =& $conn->Execute($sql);
ADODB_Session::_dumprs($rs1);
if (!$rs1) {
$err = $conn->ErrorMsg()."\n";
}
$rs2 =& $conn->UpdateBlob($table, $data, $val, " sesskey=$qkey", strtoupper($clob));
ADODB_Session::_dumprs($rs2);
if (!$rs2) {
$err .= $conn->ErrorMsg()."\n";
}
$rs = ($rs && $rs2) ? true : false;
if ($rs1) {
$rs1->Close();
}
if (is_object($rs2)) {
$rs2->Close();
}
}
if (!$rs) {
ADOConnection::outp('<p>Session Replace: ' . $conn->ErrorMsg() . '</p>', false);
return false;
} else {
// bug in access driver (could be odbc?) means that info is not committed
// properly unless select statement executed in Win2000
if ($conn->databaseType == 'access') {
$sql = "SELECT sesskey FROM $table WHERE $binary sesskey = $qkey";
$rs =& $conn->Execute($sql);
ADODB_Session::_dumprs($rs);
if ($rs) {
$rs->Close();
}
}
}
return $rs ? true : false;
}
/*!
*/
function destroy($key) {
$conn =& ADODB_Session::_conn();
$table = ADODB_Session::table();
$expire_notify = ADODB_Session::expireNotify();
if (!$conn) {
return false;
}
assert('$table');
$qkey = $conn->quote($key);
$binary = $conn->dataProvider === 'mysql' ? '/*! BINARY */' : '';
if ($expire_notify) {
reset($expire_notify);
$fn = next($expire_notify);
$savem = $conn->SetFetchMode(ADODB_FETCH_NUM);
$sql = "SELECT expireref, sesskey FROM $table WHERE $binary sesskey = $qkey";
$rs =& $conn->Execute($sql);
ADODB_Session::_dumprs($rs);
$conn->SetFetchMode($savem);
if (!$rs) {
return false;
}
if (!$rs->EOF) {
$ref = $rs->fields[0];
$key = $rs->fields[1];
//assert('$ref');
//assert('$key');
$fn($ref, $key);
}
$rs->Close();
}
$sql = "DELETE FROM $table WHERE $binary sesskey = $qkey";
$rs =& $conn->Execute($sql);
ADODB_Session::_dumprs($rs);
if ($rs) {
$rs->Close();
}
return $rs ? true : false;
}
/*!
*/
function gc($maxlifetime) {
$conn =& ADODB_Session::_conn();
$debug = ADODB_Session::debug();
$expire_notify = ADODB_Session::expireNotify();
$optimize = ADODB_Session::optimize();
$sync_seconds = ADODB_Session::syncSeconds();
$table = ADODB_Session::table();
if (!$conn) {
return false;
}
assert('$table');
$time = time();
$binary = $conn->dataProvider === 'mysql' ? '/*! BINARY */' : '';
if ($expire_notify) {
reset($expire_notify);
$fn = next($expire_notify);
$savem = $conn->SetFetchMode(ADODB_FETCH_NUM);
$sql = "SELECT expireref, sesskey FROM $table WHERE expiry < $time";
$rs =& $conn->Execute($sql);
ADODB_Session::_dumprs($rs);
$conn->SetFetchMode($savem);
if ($rs) {
$conn->BeginTrans();
$keys = array();
while (!$rs->EOF) {
$ref = $rs->fields[0];
$key = $rs->fields[1];
$fn($ref, $key);
$del = $conn->Execute("DELETE FROM $table WHERE sesskey='$key'");
$rs->MoveNext();
}
$rs->Close();
$conn->CommitTrans();
}
} else {
$sql = "DELETE FROM $table WHERE expiry < $time";
$rs =& $conn->Execute($sql);
ADODB_Session::_dumprs($rs);
if ($rs) {
$rs->Close();
}
if ($debug) {
ADOConnection::outp("<p><b>Garbage Collection</b>: $sql</p>");
}
}
// suggested by Cameron, "GaM3R" <gamr@outworld.cx>
if ($optimize) {
$driver = ADODB_Session::driver();
if (preg_match('/mysql/i', $driver)) {
$sql = "OPTIMIZE TABLE $table";
}
if (preg_match('/postgres/i', $driver)) {
$sql = "VACUUM $table";
}
if (!empty($sql)) {
$conn->Execute($sql);
}
}
if ($sync_seconds) {
$sql = 'SELECT ';
if ($conn->dataProvider === 'oci8') {
$sql .= "TO_CHAR({$conn->sysTimeStamp}, 'RRRR-MM-DD HH24:MI:SS')";
} else {
$sql .= $conn->sysTimeStamp;
}
$sql .= " FROM $table";
$rs =& $conn->SelectLimit($sql, 1);
if ($rs && !$rs->EOF) {
$dbts = reset($rs->fields);
$rs->Close();
$dbt = $conn->UnixTimeStamp($dbts);
$t = time();
if (abs($dbt - $t) >= $sync_seconds) {
global $HTTP_SERVER_VARS;
$msg = __FILE__ .
": Server time for webserver {$HTTP_SERVER_VARS['HTTP_HOST']} not in synch with database: " .
" database=$dbt ($dbts), webserver=$t (diff=". (abs($dbt - $t) / 3600) . ' hours)';
error_log($msg);
if ($debug) {
ADOConnection::outp("<p>$msg</p>");
}
}
}
}
return true;
}
}
ADODB_Session::_init();
// for backwards compatability only
function adodb_sess_open($save_path, $session_name, $persist = true) {
return ADODB_Session::open($save_path, $session_name, $persist);
}
// for backwards compatability only
function adodb_sess_gc($t)
{
return ADODB_Session::gc($t);
}
?>
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