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<?php
/*
* $Horde: horde/lib/Token/sql.php,v 1.4.2.6 2003/01/03 12:48:43 jan Exp $
*
* Copyright 1999-2003 Max Kalika <max@horde.org>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*/
/**
* Token tracking implementation for PHP's PEAR database abstraction
* layer.
*
* Required values for $params:
* 'phptype' The database type (ie. 'pgsql', 'mysql, etc.).
* 'hostspec' The hostname of the database server.
* 'username' The username with which to connect to the database.
* 'password' The password associated with 'username'.
* 'database' The name of the database.
* 'table' The name of the connections table in 'database'.
*
* Required by some database implementations:
* 'options' Additional options to pass to the database.
* 'tty' The TTY on which to connect to the database.
* 'port' The port on which to connect to the database.
*
* Optional value for $params:
* 'timeout' The period (in seconds) after which an id is purged.
*
* The table structure for the connections is as follows:
*
* create table tokens (
* token_addr varchar(8) not null,
* token_id varchar(32) not null,
* token_ts int(14) not null,
* primary key (token_addr, token_id)
* );
*
* @author Max Kalika <max@horde.org>
* @version $Revision: 1.4.2.6 $
* @since Horde 1.3
* @package horde.token
*/
class Token_sql extends Token {
/** Handle for the current database connection. */
var $db = '';
/** Boolean indicating whether or not we're connected to the SQL server. */
var $connected = false;
/**
* Constructs a new SQL connection object.
*
* @param optional array $params A hash containing connection parameters.
*/
function Token_sql($params = array())
{
$this->params = $params;
/* Set timeout to 24 hours if not specified. */
if (!isset($this->params['timeout'])) {
$this->params['timeout'] = 86400;
}
}
/**
* Opens a connection to the SQL server.
*
* @return bool TOKEN_OK on success, TOKEN_ERROR_* on failure.
*/
function connect()
{
if (!$this->connected) {
if (!is_array($this->params)) return TOKEN_ERROR_PARAMS;
if (!isset($this->params['phptype'])) return TOKEN_ERROR_PARAMS;
if (!isset($this->params['hostspec'])) return TOKEN_ERROR_PARAMS;
if (!isset($this->params['username'])) return TOKEN_ERROR_PARAMS;
if (!isset($this->params['password'])) return TOKEN_ERROR_PARAMS;
if (!isset($this->params['database'])) return TOKEN_ERROR_PARAMS;
if (!isset($this->params['table'])) return TOKEN_ERROR_PARAMS;
/* Connect to the SQL server using the supplied parameters. */
include_once 'DB.php';
$this->db = &DB::connect($this->params, true);
if (DB::isError($this->db)) {
return TOKEN_ERROR_CONNECT;
}
/* Enable the "portability" option. */
$this->db->setOption('optimize', 'portability');
$this->connected = true;
}
return TOKEN_OK;
}
/**
* Disconnect from the SQL server and clean up the connection.
*
* @return bool true on success, false on failure.
*/
function disconnect()
{
if ($this->connected) {
$this->connected = false;
return $this->db->disconnect();
}
return true;
}
/**
* Deletes all expired connection id's from the SQL server.
*
* @return bool True on success, a PEAR_Error object on failure.
*/
function purge()
{
/* If we're not already connected, invoke the connect(). */
if (!$this->connected) {
if ($this->connect() != TOKEN_OK) return TOKEN_ERROR_CONNECT;
}
/* Build SQL query. */
$query = 'delete from ' . $this->params['table'] . ' where ';
$query .= 'token_ts < ' . (time() - $this->params['timeout']);
$result = $this->db->query($query, $this->db);
/* Return an error if the update fails, too. */
if ($result !== DB_OK) return TOKEN_ERROR;
return TOKEN_OK;
}
function exists($connID)
{
/* If we're not already connected, invoke the connect(). */
if (!$this->connected) {
if ($this->connect() != TOKEN_OK) return TOKEN_ERROR_CONNECT;
}
/* Build SQL query. */
$query = 'SELECT token_id FROM ' . $this->params['table'];
$query .= ' WHERE token_addr = ' . $this->db->quote($this->hexRemoteAddr());
$query .= ' AND token_id = ' . $this->db->quote($connID);
$result = $this->db->query($query);
if (isset($result) && !DB::isError($result)) {
$row = $result->fetchRow();
}
if (empty($row) || DB::isError($row)) {
return false;
}
return true;
}
function add($connID)
{
/* If we're not already connected, invoke the connect(). */
if (!$this->connected) {
if ($this->connect() != TOKEN_OK) return TOKEN_ERROR_CONNECT;
}
/* Build SQL query. */
$query = 'INSERT INTO ' . $this->params['table'];
$query .= ' VALUES (' . $this->db->quote($this->hexRemoteAddr());
$query .= ', ' . $this->db->quote($connID) . ', ' . time() . ')';
$result = $this->db->query($query);
/* Return an error if the update fails, too. */
if ($result !== DB_OK) return TOKEN_ERROR;
return TOKEN_OK;
}
}
?>
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