/**
* Fetch the encryption key
*
* Returns it as MD5 in order to have an exact-length 128 bit key.
* Mcrypt is sensitive to keys that are not the correct length
*
* @access public
* @param string
* @return string
*/
public function get_key($key = '')
{
if ($key == '') {
if ($this->encryption_key != '') {
return $this->encryption_key;
}
$key = config_item('encryption_key');
if ($key == FALSE) {
show_error(ld_msg('enc_lib_msg_001'));
}
}
return md5($key);
}
/**
* Session Constructor
*
* The constructor runs the session routines automatically
* whenever the class is instantiated.
*/
function __construct()
{
// Set all the session preferences, which can either be set
// manually via the $params array above or via the config file
foreach (array('sess_encrypt_cookie', 'sess_expiration', 'sess_expire_on_close', 'sess_match_ip', 'sess_match_useragent', 'sess_cookie_name', 'cookie_path', 'cookie_domain', 'cookie_secure', 'sess_time_to_update', 'time_reference', 'cookie_prefix', 'encryption_key') as $key) {
$this->{$key} = isset($params[$key]) ? $params[$key] : config_item($key);
}
if ($this->encryption_key == '') {
show_error(ld_msg('session_msg_001'));
}
// Do we need encryption? If so, load the encryption class
if ($this->sess_encrypt_cookie == TRUE) {
$this->ENC =& load_class('Encryption');
}
// Set the "now" time. Can either be GMT or server time, based on the
// config prefs. We use this to set the "last activity" time
$this->now = get_time();
// Set the session length. If the session expiration is
// set to zero we'll set the expiration two years from now.
if ($this->sess_expiration == 0) {
$this->sess_expiration = 60 * 60 * 24 * 365 * 2;
}
// Set the cookie name
$this->sess_cookie_name = $this->cookie_prefix . $this->sess_cookie_name;
// Run the Session routine. If a session doesn't exist we'll
// create a new one. If it does, we'll update it.
if (!$this->sess_read()) {
$this->sess_create();
} else {
$this->sess_update();
}
// Delete 'old' flashdata (from last request)
$this->_flashdata_sweep();
// Mark all new flashdata as old (data will be deleted before next request)
$this->_flashdata_mark();
// Delete expired sessions if necessary
$this->_sess_gc();
}
/**
* Display an error message
*
* @access private
* @param string the error message
* @return string sends the application/error_db.php template
*/
private function display_error($error = '')
{
// check whether display error or not !!!
if ($this->db_debug === FALSE) {
return;
}
$heading = ld_msg('display_err_002');
$message = $error;
// Find the most likely culprit of the error by going through
// the backtrace until the source file is no longer in the
// database folder.
$trace = debug_backtrace();
foreach ($trace as $call) {
if (isset($call['file']) and strpos($call['file'], SITE_ROOT) === FALSE) {
// Found it - use a relative path for safety
$message[] = 'Filename: ' . str_replace(SITE_ROOT, '', $call['file']);
$message[] = 'Line Number: ' . $call['line'];
break;
}
}
echo show_error($message, $heading, 'error_db');
exit;
}
function set_status_header($code = 200, $text = '')
{
$stati = array(200 => 'OK', 201 => 'Created', 202 => 'Accepted', 203 => 'Non-Authoritative Information', 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content', 300 => 'Multiple Choices', 301 => 'Moved Permanently', 302 => 'Found', 304 => 'Not Modified', 305 => 'Use Proxy', 307 => 'Temporary Redirect', 400 => 'Bad Request', 401 => 'Unauthorized', 403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed', 406 => 'Not Acceptable', 407 => 'Proxy Authentication Required', 408 => 'Request Timeout', 409 => 'Conflict', 410 => 'Gone', 411 => 'Length Required', 412 => 'Precondition Failed', 413 => 'Request Entity Too Large', 414 => 'Request-URI Too Long', 415 => 'Unsupported Media Type', 416 => 'Requested Range Not Satisfiable', 417 => 'Expectation Failed', 500 => 'Internal Server Error', 501 => 'Not Implemented', 502 => 'Bad Gateway', 503 => 'Service Unavailable', 504 => 'Gateway Timeout', 505 => 'HTTP Version Not Supported');
if ($code == '' or !is_numeric($code)) {
show_error(ld_msg('header_sts_code_001'));
}
if (isset($stati[$code]) and $text == '') {
$text = $stati[$code];
}
if ($text == '') {
show_error(ld_msg('header_sts_code_002'));
}
$server_protocol = isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : FALSE;
if (substr(php_sapi_name(), 0, 3) == 'cgi') {
header("Status: {$code} {$text}", TRUE);
} elseif ($server_protocol == 'HTTP/1.1' or $server_protocol == 'HTTP/1.0') {
header($server_protocol . " {$code} {$text}", TRUE, $code);
} else {
header("HTTP/1.1 {$code} {$text}", TRUE, $code);
}
}
function base_url()
{
$base_url = config_item('base_url');
if ($base_url !== FALSE and $base_url != '') {
return $base_url = rtrim($base_url . '/', '/') . '/';
} else {
show_error(ld_msg('err_001'));
}
}
