[eluser]Patrick Savalle[/eluser]
Code:
<?php
if ( !defined( 'BASEPATH' ) )
exit( 'No direct script access allowed' );
// ------------------------------------------------------------------------
/**
* Mobbr APC Output caching class
*
* @package CodeIgniter
* @subpackage Libraries
* @category Core
* @author Patrick Savalle
* @link
*
* Overrides the caching method of the standard CI_Output class
* Uses setting: /config/config['output_caching_engine'] = ( "apc" | "default" | "dummy" );
*
* Normal CI behaviour on setting = 'default' or when setting above is missing entirely.
*
* Generates an error when APC is not installed.
*/
class MBR_Output extends CI_Output
{
// --------------------------------------------------------------------
static private function construct_key( )
{
// must be a key that is available to external caches also
return $_SERVER["REQUEST_URI"];
}
// --------------------------------------------------------------------
/**
* Write a Cache File
*
* @access public
* @return void
*/
function _write_cache( $output )
{
$engine = get_instance( )->config->item( 'output_caching_engine' );
if ( empty( $engine ) )
{
$engine = 'default';
}
switch ( $engine )
{
case 'dummy' :
return;
case 'apc' :
apc_store( self::construct_key( ), array( $this->headers, $output ), (int)($this->cache_expiration * 60) );
return;
default :
parent::_write_cache( $output );
return;
}
}
// --------------------------------------------------------------------
/**
* Update/serve a cached file
*
* @access public
* @return void
*/
function _display_cache( &$CFG, &$URI )
{
$engine = $CFG->item( 'output_caching_engine' );
if ( empty( $engine ) )
{
$engine = 'default';
}
switch ( $engine )
{
case 'dummy' :
return FALSE;
case 'apc' :
$cache = apc_fetch( self::construct_key( ), $success );
if ( $success )
{
list( $headers, $output ) = $cache;
if ( count( $headers ) > 0 )
{
foreach ( $headers as $header )
{
header( $header[0], $header[1] );
}
}
echo $output;
return TRUE;
}
return FALSE;
default :
return parent::_display_cache( $CFG, $URI );
}
}
}
