123 lines
2.5 KiB
PHP
123 lines
2.5 KiB
PHP
<?php
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/**
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* @brief Abstract output caching 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 12 November 2018
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*/
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namespace IPS\Output;
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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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* Abstract Output Caching Class
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*/
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abstract class _Cache
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{
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/**
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* @brief Instance
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*/
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protected static $instance;
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/**
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* @brief Caches already retrieved this instance
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*/
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protected $cache = array();
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/**
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* @brief Log
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*/
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public $log = array();
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/**
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* Get instance
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*
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* @return \IPS\Data\Cache
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*/
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public static function i()
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{
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if( static::$instance === NULL )
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{
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$classname = 'IPS\Output\Cache\\' . \IPS\OUTPUT_CACHE_METHOD;
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if ( \class_exists( $classname ) and $classname::supported() )
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{
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try
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{
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static::$instance = new $classname();
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}
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catch( \IPS\Data\Cache\Exception $e )
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{
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static::$instance = new \IPS\Output\Cache\Database();
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}
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}
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else
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{
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static::$instance = new \IPS\Output\Cache\Database();
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}
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}
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return static::$instance;
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}
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/**
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* Store value
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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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public function set( $key, $value, $meta, \IPS\DateTime $expire )
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{
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if ( \IPS\CACHING_LOG )
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{
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$this->log[ microtime(true) ] = array( 'set', $key, json_encode( $value, JSON_PRETTY_PRINT ), var_export( debug_backtrace( DEBUG_BACKTRACE_IGNORE_ARGS ), TRUE ) );
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}
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if ( $this->_set( $key, $value, $meta, $expire ) )
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{
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return TRUE;
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}
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return FALSE;
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}
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/**
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* Get value
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*
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* @param string $key Key
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* @return mixed
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* @throws \OutOfRangeException
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*/
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public function get( $key )
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{
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$data = $this->_get( $key );
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if( \is_array( $data ) and \count( $data ) and isset( $data['output'] ) and isset( $data['expires'] ) )
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{
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/* Is it expired? */
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if( $data['expires'] AND time() < $data['expires'] )
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{
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return $data;
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}
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else
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{
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throw new \OutOfRangeException;
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}
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}
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else
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{
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throw new \OutOfRangeException;
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}
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}
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} |