116 lines
2.5 KiB
PHP
116 lines
2.5 KiB
PHP
<?php
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/**
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* @brief Database Output Cache Storage Class
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* @author <a href='https://www.invisioncommunity.com'>Invision Power Services, Inc.</a>
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* @copyright (c) Invision Power Services, Inc.
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* @license https://www.invisioncommunity.com/legal/standards/
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* @package Invision Community
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* @since 17 November 2018
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*/
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namespace IPS\Output\Cache;
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/* To prevent PHP errors (extending class does not exist) revealing path */
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if ( !\defined( '\IPS\SUITE_UNIQUE_KEY' ) )
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{
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header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
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exit;
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}
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/**
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* Database Output Cache Storage Class
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*/
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class _Database extends \IPS\Output\Cache
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{
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/**
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* Server supports this method?
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*
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* @return bool
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*/
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public static function supported()
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{
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return TRUE;
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}
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/**
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* Abstract Method: Get
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*
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* @param string $key Key
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* @return array
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*/
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protected function _get( $key )
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{
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try
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{
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$data = \IPS\Db::i()->select( '*', 'core_output_cache', array( 'cache_key=? AND cache_expire>?', $key, time() ) )->first();
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$meta = array();
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if ( ! empty( $data['cache_meta'] ) )
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{
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$meta = json_decode( $data['cache_meta'], TRUE );
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}
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return array( 'output' => $data['cache_value'], 'meta' => $meta, 'expires' => $data['cache_expire'] );
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}
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catch ( \UnderflowException $e )
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{
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throw new \OutOfRangeException;
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}
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}
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/**
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* Store value using cache method if available or falling back to the database
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*
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* @param string $key Key
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* @param mixed $value Value
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* @param mixed $meta Meta data (contentType, headers, etc)
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* @param \IPS\DateTime $expire Expiration if using database
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* @return bool
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*/
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protected function _set( $key, $value, $meta, \IPS\DateTime $expire )
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{
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try
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{
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\IPS\Db::i()->replace( 'core_output_cache', array(
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'cache_key' => $key,
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'cache_value' => $value,
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'cache_meta' => json_encode( $meta ),
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'cache_expire' => $expire->getTimestamp()
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) );
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}
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catch( \IPS\Db\Exception $e )
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{
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\IPS\Log::debug( $e, 'guest_cache_fail' );
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return FALSE;
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}
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return TRUE;
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}
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/**
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* Remove all expired caches
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*
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* @return void
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*/
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public function deleteExpired()
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{
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try
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{
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\IPS\Db::i()->delete( 'core_output_cache', array( 'cache_expire<?', time() ) );
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}
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catch ( \IPS\Db\Exception $e ) { }
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}
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/**
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* Abstract Method: Clear All Caches
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*
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* @return void
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*/
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public function clearAll()
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{
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try
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{
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\IPS\Db::i()->delete( 'core_output_cache' );
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}
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catch ( \IPS\Db\Exception $e ){}
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}
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} |