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IN PROGRESS - issue EONE-10: System thumbnails - on-the-fly thumbnailing
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secretr
parent
401fc2c047
commit
d5f06fc0bc
245
thumb.php
Normal file
245
thumb.php
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<?php
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/*
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* e107 website system
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*
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* Copyright (C) 2008-2010 e107 Inc (e107.org)
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* Released under the terms and conditions of the
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* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)
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*
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* On-the-fly thumbnail generator
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*
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* $URL$
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* $Id$
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*/
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/**
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* @package e107
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* @subpackage core
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* @version $Id$
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*
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* On-the-fly thumbnail generator
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*/
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define('e107_INIT', true);
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$thumbpage = new e_thumbpage();
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if(!$thumbpage->checkSrc())
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{
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die(' Access denied!');
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}
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$thumbpage->sendImage();
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/**
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* Handle on-the-fly created thumbnails
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*
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* @author secretr
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*
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*/
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class e_thumbpage
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{
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protected $_request = array();
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protected $_src = null;
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/**
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* Constructor - init paths
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* @todo FIX e107 (new folder structure), simplify all this, e.g. e107::getInstance()->initMinimal($path_to_e107_config);
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*
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* @return void
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*/
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public function __construct()
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{
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// initial path
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$self = realpath(dirname(__FILE__));
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// Config
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include($self.'/e107_config.php');
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$tmp = $self.'/'.$HANDLERS_DIRECTORY;
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//Core functions - now API independent
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@require($tmp.'/core_functions.php');
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//e107 class
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@require($tmp.'/e107_class.php');
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$e107_paths = compact(
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'ADMIN_DIRECTORY',
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'FILES_DIRECTORY',
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'IMAGES_DIRECTORY',
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'THEMES_DIRECTORY',
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'PLUGINS_DIRECTORY',
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'HANDLERS_DIRECTORY',
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'LANGUAGES_DIRECTORY',
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'HELP_DIRECTORY',
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'DOWNLOADS_DIRECTORY',
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'UPLOADS_DIRECTORY',
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'MEDIA_DIRECTORY',
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'CACHE_DIRECTORY',
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'LOGS_DIRECTORY',
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'WEB_DIRECTORY',
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'SYSTEM_DIRECTORY',
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'CORE_DIRECTORY'
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);
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$sql_info = array(); //compact('mySQLserver', 'mySQLuser', 'mySQLpassword', 'mySQLdefaultdb', 'mySQLprefix', 'mySQLcharset');
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e107::getInstance()->initCore($e107_paths, $self, $sql_info, varset($e107_CONFIG, array()));
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unset($tmp, $self);
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// parse request
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$this->parseRequest();
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}
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function parseRequest()
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{
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parse_str(str_replace('&', '&', e_QUERY), $request);
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$this->_request = $request;
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}
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function checkSrc()
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{
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if(!vartrue($this->_request['src']))
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{
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return false;
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}
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$tp = e107::getParser();
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// FIXME - better way, maybe additional e_parse method, returning path SC array only
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$search = array('e_BASE/', 'e_IMAGE/', 'e_MEDIA/', 'e_PLUGIN/', 'e_THEME/', 'e_WEB/');
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$replace = array('{e_BASE}', '{e_IMAGE}', '{e_MEDIA}', '{e_PLUGIN}', '{e_THEME}', '{e_WEB}');
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$this->_request['src'] = str_replace($search, $replace,$this->_request['src']);
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$this->_src = $tp->createConstants($this->_request['src'], 'mix');
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if(preg_match('#^(https?|ftps?|file)://#i', $this->_request['src']))
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{
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return false;
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}
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if(!is_writeable(e_CACHE_IMAGE))
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{
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echo 'Cache folder not writeable! ';
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return false;
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}
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$path = $tp->replaceConstants($this->_src);
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if(is_file($path) && is_readable($path))
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{
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$this->_src_path = $path;
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return true;
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}
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return false;
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}
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function sendImage()
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{
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if(!$this->_src_path)
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{
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return $this;
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}
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$thumbnfo = pathinfo($this->_src_path);
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$options = $this->getRequestOptions();
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$cache_str = md5(serialize($options).md5_file($this->_src_path));
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$fname = strtolower('Thumb_'.$thumbnfo['filename'].'_'.$cache_str.'.'.$thumbnfo['extension']).'.cache.bin';
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if(is_file(e_CACHE_IMAGE.$fname) && is_readable(e_CACHE_IMAGE.$fname))
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{
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$thumbnfo['lmodified'] = filemtime(e_CACHE_IMAGE.$fname);
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$thumbnfo['md5s'] = md5_file(e_CACHE_IMAGE.$fname);
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$thumbnfo['fsize'] = filesize(e_CACHE_IMAGE.$fname);
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// check browser cache
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if (@$_SERVER['HTTP_IF_MODIFIED_SINCE'] && ($thumbnfo['lmodified'] <= strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])) && (isset($_SERVER['HTTP_IF_NONE_MATCH']) && trim($_SERVER['HTTP_IF_NONE_MATCH']) == $thumbnfo['md5s']))
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{
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header('HTTP/1.1 304 Not Modified');
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exit;
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}
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// Send required headers
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$this->sendHeaders($thumbnfo);
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@readfile(e_CACHE_IMAGE.$fname);
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exit;
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}
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// TODO - wrap it around generic e107 thumb handler
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@require(e_HANDLER.'phpthumb/ThumbLib.inc.php');
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try
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{
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$thumb = PhpThumbFactory::create($this->_src_path);
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$thumb->setOptions(array('correctPermissions' => true));
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}
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catch (Exception $e)
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{
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echo $e->getMessage();
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return $this;
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}
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if(isset($this->_request['w']))
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{
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$thumb->resize($this->_request['w'], varset($this->_request['h'], $this->_request['w']));
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}
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else
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{
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$thumb->adaptiveResize($this->_request['aw'], varset($this->_request['ah'], $this->_request['aw']));
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}
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// set cache
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$thumb->save(e_CACHE_IMAGE.$fname);
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// show thumb
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$thumb->show();
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exit;
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}
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function getRequestOptions()
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{
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$ret = array();
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$ret['w'] = isset($this->_request['w']) ? intval($this->_request['w']) : false;
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$ret['h'] = isset($this->_request['h']) ? intval($this->_request['h']) : $ret['w'];
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$ret['aw'] = isset($this->_request['aw']) ? intval($this->_request['aw']) : false;
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$ret['ah'] = isset($this->_request['ah']) ? intval($this->_request['ah']) : $ret['aw'];
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return $ret;
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}
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public function sendHeaders($thumbnfo)
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{
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if(headers_sent())
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{
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echo 'Headers already sent! ';
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exit;
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}
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header('Cache-Control: must-revalidate');
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header('Last-Modified: '.gmdate('D, d M Y H:i:s', $thumbnfo['lmodified']).' GMT');
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header('Content-Length: '.$thumbnfo['fsize']);
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$ctype = self::ctype($thumbnfo['extension']);
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if(null !== $ctype)
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{
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header('Content-Type: '.$ctype);
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}
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// Expire header - 1 year
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$time = time() + 365 * 86400;
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header('Expires: '.gmdate("D, d M Y H:i:s", $time).' GMT');
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header("Etag: ".$thumbnfo['md5s']);
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}
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public static function ctype($ftype)
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{
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static $known_types = array(
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'gif' => 'image/gif',
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'jpg' => 'image/jpeg',
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'jpeg' => 'image/jpeg',
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'png' => 'image/png',
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//'bmp' => 'image/bmp',
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);
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$ftype = strtolower($ftype);
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if(isset($known_types[$ftype]))
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{
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return $known_types[$ftype];
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}
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return null;
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}
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}
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