Version 4.5.0

system/Output/Cache/Database.php

@@ -0,0 +1,116 @@
+<?php
+/**
+ * @brief		Database Output Cache Storage Class
+ * @author		<a href='https://www.invisioncommunity.com'>Invision Power Services, Inc.</a>
+ * @copyright	(c) Invision Power Services, Inc.
+ * @license		https://www.invisioncommunity.com/legal/standards/
+ * @package		Invision Community
+ * @since		17 November 2018
+ */
+
+namespace IPS\Output\Cache;
+
+/* To prevent PHP errors (extending class does not exist) revealing path */
+if ( !\defined( '\IPS\SUITE_UNIQUE_KEY' ) )
+{
+	header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
+	exit;
+}
+
+/**
+ * Database Output Cache Storage Class
+ */
+class _Database extends \IPS\Output\Cache
+{
+	/**
+	 * Server supports this method?
+	 *
+	 * @return	bool
+	 */
+	public static function supported()
+	{
+		return TRUE;
+	}
+	
+	/**
+	 * Abstract Method: Get
+	 *
+	 * @param	string	$key	Key
+	 * @return	array
+	 */
+	protected function _get( $key )
+	{
+		try
+		{
+			$data = \IPS\Db::i()->select( '*', 'core_output_cache', array( 'cache_key=? AND cache_expire>?', $key, time() ) )->first();
+			$meta = array();
+			
+			if ( ! empty( $data['cache_meta'] ) )
+			{
+				$meta = json_decode( $data['cache_meta'], TRUE );
+			}
+			return array( 'output' => $data['cache_value'], 'meta' => $meta, 'expires' => $data['cache_expire'] );
+		}
+		catch ( \UnderflowException $e )
+		{
+			throw new \OutOfRangeException;
+		}
+	}
+	
+	/**
+	 * Store value using cache method if available or falling back to the database
+	 *
+	 * @param	string			$key		Key
+	 * @param	mixed			$value		Value
+	 * @param	mixed			$meta		Meta data (contentType, headers, etc)
+	 * @param	\IPS\DateTime	$expire		Expiration if using database
+	 * @return	bool
+	 */
+	protected function _set( $key, $value, $meta, \IPS\DateTime $expire )
+	{
+		try
+		{
+			\IPS\Db::i()->replace( 'core_output_cache', array(
+				'cache_key' => $key,
+				'cache_value' => $value,
+				'cache_meta' => json_encode( $meta ),
+				'cache_expire' => $expire->getTimestamp()
+			) );
+		}
+		catch( \IPS\Db\Exception $e )
+		{
+			\IPS\Log::debug( $e, 'guest_cache_fail' );
+			return FALSE;
+		}
+
+		return TRUE;
+	}
+
+	/**
+	 * Remove all expired caches
+	 *
+	 * @return	void
+	 */
+	public function deleteExpired()
+	{
+		try
+		{
+			\IPS\Db::i()->delete( 'core_output_cache', array( 'cache_expire<?', time() ) );
+		}
+		catch ( \IPS\Db\Exception $e ) { }
+	}
+		
+	/**
+	 * Abstract Method: Clear All Caches
+	 *
+	 * @return	void
+	 */
+	public function clearAll()
+	{
+		try
+		{
+			\IPS\Db::i()->delete( 'core_output_cache' );
+		}
+		catch ( \IPS\Db\Exception $e ){}
+	}
+}