[Sommaire] [Imprimer]

   1  <?php
   2  # ***** BEGIN LICENSE BLOCK *****
   3  # This file is part of Clearbricks.
   4  # Copyright (c) 2006 Olivier Meunier and contributors. All rights
   5  # reserved.
   6  #
   7  # Clearbricks is free software; you can redistribute it and/or modify
   8  # it under the terms of the GNU General Public License as published by
   9  # the Free Software Foundation; either version 2 of the License, or
  10  # (at your option) any later version.
  11  # 
  12  # Clearbricks is distributed in the hope that it will be useful,
  13  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  # GNU General Public License for more details.
  16  # 
  17  # You should have received a copy of the GNU General Public License
  18  # along with Clearbricks; if not, write to the Free Software
  19  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  #
  21  # ***** END LICENSE BLOCK *****
  22  
  23  class sessionDB
  24  {
  25      private $con;
  26      private $table;
  27      private $cookie_name;
  28      private $cookie_path;
  29      private $ttl = '-120 minutes';
  30      
  31  	public function __construct(&$con,$table,$cookie_name,$cookie_path='/')
  32      {
  33          $this->con =& $con;
  34          $this->table = $table;
  35          $this->cookie_name = $cookie_name;
  36          $this->cookie_path = $cookie_path;
  37          
  38          if(function_exists('ini_set'))
  39          {
  40              @ini_set('session.use_cookies','1');
  41              @ini_set('session.use_only_cookies','1');
  42              @ini_set('url_rewriter.tags','');
  43              @ini_set('session.use_trans_sid','0');
  44              @ini_set('session.cookie_path',$this->cookie_path);
  45          }
  46      }
  47      
  48  	public function __destruct()
  49      {
  50          if (isset($_SESSION)) {
  51              session_write_close();
  52          }
  53      }
  54      
  55  	public function start()
  56      {
  57          session_set_save_handler(
  58              array(&$this, '_open'),
  59              array(&$this, '_close'),
  60              array(&$this, '_read'),
  61              array(&$this, '_write'),
  62              array(&$this, '_destroy'),
  63              array(&$this, '_gc')
  64          ); 
  65          
  66          if (!isset($_COOKIE[$this->cookie_name])) {
  67              session_id(sha1(uniqid(rand(),true)));
  68          }
  69          
  70          session_name($this->cookie_name);
  71          session_start();
  72      }
  73      
  74  	public function destroy()
  75      {
  76          $_SESSION = array();
  77          session_unset();
  78          session_destroy();
  79          setcookie(session_name(),'',0,$this->cookie_path);
  80      }
  81      
  82      
  83  	public function _open($path,$name)
  84      {
  85          return true;
  86      }
  87      
  88  	public function _close()
  89      {
  90          $this->_gc();
  91          return true;
  92      }
  93      
  94  	public function _read($ses_id)
  95      {
  96          $strReq = 'SELECT ses_value FROM '.$this->table.' '.
  97                  'WHERE ses_id = \''.$this->checkID($ses_id).'\' ';
  98          
  99          $rs = $this->con->select($strReq);
 100          
 101          if ($rs->isEmpty()) {
 102              return '';
 103          } else {
 104              return $rs->f('ses_value');
 105          }
 106      }
 107      
 108  	public function _write($ses_id, $data)
 109      {
 110          $strReq = 'SELECT ses_id '.
 111                  'FROM '.$this->table.' '.
 112                  "WHERE ses_id = '".$this->checkID($ses_id)."' ";
 113          
 114          $rs = $this->con->select($strReq);
 115          
 116          $cur = $this->con->openCursor($this->table);
 117          $cur->ses_time = (string) time();
 118          $cur->ses_value = (string) $data;
 119          
 120          if (!$rs->isEmpty())
 121          {
 122              $cur->update("WHERE ses_id = '".$this->checkID($ses_id)."' ");
 123          }
 124          else
 125          {
 126              $cur->ses_id = (string) $this->checkID($ses_id);
 127              $cur->ses_start = (string) time();
 128              
 129              $cur->insert();
 130          }
 131          
 132          return true;
 133      }
 134      
 135  	public function _destroy($ses_id)
 136      {
 137          $strReq = 'DELETE FROM '.$this->table.' '.
 138                  'WHERE ses_id = \''.$this->checkID($ses_id).'\' ';
 139          
 140          $this->con->execute($strReq);
 141          
 142          $this->_optimize();
 143          return true;
 144      }
 145      
 146  	public function _gc()
 147      {
 148          $ses_life = strtotime($this->ttl);
 149          
 150          $strReq = 'DELETE FROM '.$this->table.' '.
 151                  'WHERE ses_time < '.$ses_life.' ';
 152          
 153          
 154          $this->con->execute($strReq);
 155          
 156          if ($this->con->changes() > 0) {
 157              $this->_optimize();
 158          }
 159          return true;
 160      }
 161      
 162  	private function _optimize()
 163      {
 164          $this->con->vacuum($this->table);
 165      }
 166      
 167  	private function checkID($id)
 168      {
 169          if (!preg_match('/^([0-9a-f]{40})$/i',$id)) {
 170              return null;
 171          }
 172          return $id;
 173      }
 174  }
 175  
 176  ?>