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class.IMagickPreviewer.php
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class.IMagickPreviewer.php
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<?php
/*
* Copyright 2007-2011 Charles du Jeu <contact (at) cdujeu.me>
* This file is part of AjaXplorer.
*
* AjaXplorer is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* AjaXplorer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with AjaXplorer. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <http://www.ajaxplorer.info/>.
*/
defined('AJXP_EXEC') or die( 'Access not allowed');
/**
* Encapsulates calls to Image Magick to extract JPG previews of PDF, PSD, TIFF, etc.
* @package AjaXplorer_Plugins
* @subpackage Editor
*/
class IMagickPreviewer extends AJXP_Plugin {
protected $extractAll = false;
protected $onTheFly = false;
protected $useOnTheFly = false;
protected $imagickExtensions = array("pdf", "svg", "tif", "tiff", "psd", "xcf", "eps", "cr2");
protected $unoconvExtensios = array("xls", "xlsx", "ods", "doc", "docx", "odt", "ppt", "pptx", "odp", "rtf");
public function loadConfigs($configsData){
parent::loadConfigs($configsData);
if(isSet($configsData["UNOCONV"]) && !empty($configsData["UNOCONV"])){
// APPEND THE UNOCONV SUPPORTED EXTENSIONS
$this->manifestDoc->documentElement->setAttribute("mimes", implode(",", array_merge($this->imagickExtensions,$this->unoconvExtensios)));
}else{
$this->manifestDoc->documentElement->setAttribute("mimes", implode(",", $this->imagickExtensions));
}
}
public function switchAction($action, $httpVars, $filesVars){
if(!isSet($this->actions[$action])) return false;
$repository = ConfService::getRepository();
if(!$repository->detectStreamWrapper(true)){
return false;
}
$convert = $this->getFilteredOption("IMAGE_MAGICK_CONVERT");
if(empty($convert)){
return false;
}
$streamData = $repository->streamData;
$destStreamURL = $streamData["protocol"]."://".$repository->getId();
$flyThreshold = 1024*1024*intval($this->getFilteredOption("ONTHEFLY_THRESHOLD", $repository->getId()));
if($action == "imagick_data_proxy"){
$this->extractAll = false;
if(isSet($httpVars["all"])) $this->extractAll = true;
$file = AJXP_Utils::decodeSecureMagic($httpVars["file"]);
if(($size = filesize($destStreamURL.$file)) === false) {
return ;
}else{
if($size > $flyThreshold) $this->useOnTheFly = true;
else $this->useOnTheFly = false;
}
if($this->extractAll){
$node = new AJXP_Node($destStreamURL.$file);
AJXP_Controller::applyHook("node.read", array($node));
}
$cache = AJXP_Cache::getItem("imagick_".($this->extractAll?"full":"thumb"), $destStreamURL.$file, array($this, "generateJpegsCallback"));
$cacheData = $cache->getData();
if(!$this->useOnTheFly && $this->extractAll){ // extract all on first view
$ext = pathinfo($file, PATHINFO_EXTENSION);
$prefix = str_replace(".$ext", "", $cache->getId());
$files = $this->listExtractedJpg($prefix);
header("Content-Type: application/json");
print(json_encode($files));
return;
}else if($this->extractAll){ // on the fly extract mode
$ext = pathinfo($file, PATHINFO_EXTENSION);
$prefix = str_replace(".$ext", "", $cache->getId());
$files = $this->listPreviewFiles($destStreamURL.$file, $prefix);
header("Content-Type: application/json");
print(json_encode($files));
return;
}else{
header("Content-Type: image/jpeg; name=\"".basename($file)."\"");
header("Content-Length: ".strlen($cacheData));
header('Cache-Control: public');
header("Pragma:");
header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()-10000) . " GMT");
header("Expires: " . gmdate("D, d M Y H:i:s", time()+5*24*3600) . " GMT");
print($cacheData);
return;
}
}else if($action == "get_extracted_page" && isSet($httpVars["file"])){
$file = (defined('AJXP_SHARED_CACHE_DIR')?AJXP_SHARED_CACHE_DIR:AJXP_CACHE_DIR)."/imagick_full/".AJXP_Utils::decodeSecureMagic($httpVars["file"]);
if(!is_file($file)){
$srcfile = AJXP_Utils::decodeSecureMagic($httpVars["src_file"]);
$size = filesize($destStreamURL."/".$srcfile);
if($size > $flyThreshold) $this->useOnTheFly = true;
else $this->useOnTheFly = false;
if($this->useOnTheFly) $this->onTheFly = true;
$this->generateJpegsCallback($destStreamURL.$srcfile, $file);
}
if(!is_file($file)) return ;
header("Content-Type: image/jpeg; name=\"".basename($file)."\"");
header("Content-Length: ".filesize($file));
header('Cache-Control: public');
readfile($file);
exit(1);
}else if($action == "delete_imagick_data" && isSet($httpVars["file"])){
/*
$files = $this->listExtractedJpg(AJXP_CACHE_DIR."/".$httpVars["file"]);
foreach ($files as $file){
if(is_file(AJXP_CACHE_DIR."/".$file["file"])) unlink(AJXP_CACHE_DIR."/".$file["file"]);
}
*/
}
}
/**
*
* @param AJXP_Node $oldNode
* @param AJXP_Node $newNode
* @param Boolean $copy
*/
public function deleteImagickCache($oldNode, $newNode = null, $copy = false){
if($oldNode == null) return;
$oldFile = $oldNode->getUrl();
// Should remove imagick cache file
if(!$this->handleMime($oldFile)) return;
if($newNode == null || $copy == false){
AJXP_Cache::clearItem("imagick_thumb", $oldFile);
$cache = AJXP_Cache::getItem("imagick_full", $oldFile, false);
$prefix = str_replace(".".pathinfo($cache->getId(), PATHINFO_EXTENSION), "", $cache->getId());
$files = $this->listExtractedJpg($prefix);
foreach ($files as $file){
if(is_file((defined('AJXP_SHARED_CACHE_DIR')?AJXP_SHARED_CACHE_DIR:AJXP_CACHE_DIR)."/".$file["file"])) unlink(AJXP_CACHE_DIR."/".$file["file"]);
}
}
}
protected function listExtractedJpg($prefix){
$files = array();
$index = 0;
while(is_file($prefix."-".$index.".jpg")){
$extract = $prefix."-".$index.".jpg";
list($width, $height, $type, $attr) = @getimagesize($extract);
$files[] = array("file" => basename($extract), "width"=>$width, "height"=>$height);
$index ++;
}
if(is_file($prefix.".jpg")){
$extract = $prefix.".jpg";
list($width, $height, $type, $attr) = @getimagesize($extract);
$files[] = array("file" => basename($extract), "width"=>$width, "height"=>$height);
}
return $files;
}
protected function listPreviewFiles($file, $prefix){
$files = array();
$index = 0;
$unoconv = $this->getFilteredOption("UNOCONV");
if(!empty($unoconv)){
$officeExt = array('xls', 'xlsx', 'ods', 'doc', 'docx', 'odt', 'ppt', 'pptx', 'odp', 'rtf');
$extension = strtolower(pathinfo($file, PATHINFO_EXTENSION));
if(in_array($extension, $officeExt)){
$unoDoc = $prefix."_unoconv.pdf";
if(is_file($unoDoc)) $file = $unoDoc;
}
}
$count = $this->countPages($file);
while($index < $count){
$extract = $prefix."-".$index.".jpg";
list($width, $height, $type, $attr) = @getimagesize($extract);
$files[] = array("file" => basename($extract), "width"=>$width, "height"=>$height);
$index ++;
}
if(is_file($prefix.".jpg")){
$extract = $prefix.".jpg";
list($width, $height, $type, $attr) = @getimagesize($extract);
$files[] = array("file" => basename($extract), "width"=>$width, "height"=>$height);
}
return $files;
}
public function generateJpegsCallback($masterFile, $targetFile){
$unoconv = $this->getFilteredOption("UNOCONV");
if(!empty($unoconv)){
$officeExt = array('xls', 'xlsx', 'ods', 'doc', 'docx', 'odt', 'ppt', 'pptx', 'odp', 'rtf');
}else{
$unoconv = false;
}
$extension = strtolower(pathinfo($masterFile, PATHINFO_EXTENSION));
$node = new AJXP_Node($masterFile);
$masterFile = $node->getRealFile();
if(DIRECTORY_SEPARATOR == "\\"){
$masterFile = str_replace("/", "\\", $masterFile);
}
$wrappers = stream_get_wrappers();
$wrappers_re = '(' . join('|', $wrappers) . ')';
$isStream = (preg_match( "!^$wrappers_re://!", $targetFile ) === 1);
if($isStream){
$backToStreamTarget = $targetFile;
$targetFile = tempnam(AJXP_Utils::getAjxpTmpDir(), "imagick_").".pdf";
}
$workingDir = dirname($targetFile);
$out = array();
$return = 0;
$tmpFileThumb = str_replace(".$extension", ".jpg", $targetFile);
if(DIRECTORY_SEPARATOR == "\\"){
$tmpFileThumb = str_replace("/", "\\", $tmpFileThumb);
}
if(!$this->extractAll){
//register_shutdown_function("unlink", $tmpFileThumb);
}else{
@set_time_limit(90);
}
chdir($workingDir);
if($unoconv !== false && in_array($extension, $officeExt)){
$unoDoc = str_replace(".jpg", "_unoconv.pdf", $tmpFileThumb);
if(!is_file($tmpFileThumb)){
// Create PDF Version now
$unoconv = "HOME=/tmp ".$unoconv." --stdout -f pdf ".escapeshellarg($masterFile)." > ".escapeshellarg(basename($unoDoc));
exec($unoconv, $out, $return);
}
if(is_file($unoDoc)){
$masterFile = basename($unoDoc);
}
}
if($this->onTheFly){
$pageNumber = strrchr($targetFile, "-");
$pageNumber = str_replace(array(".jpg","-"), "", $pageNumber);
$pageLimit = "[".$pageNumber."]";
$this->extractAll = true;
}else{
if(!$this->useOnTheFly){
$pageLimit = ($this->extractAll?"":"[0]");
}else{
$pageLimit = "[0]";
if($this->extractAll) $tmpFileThumb = str_replace(".jpg", "-0.jpg", $tmpFileThumb);
}
}
$customOptions = $this->getFilteredOption("IM_CUSTOM_OPTIONS");
$customEnvPath = $this->getFilteredOption("ADDITIONAL_ENV_PATH");
$viewerQuality = $this->getFilteredOption("IM_VIEWER_QUALITY");
$thumbQuality = $this->getFilteredOption("IM_THUMB_QUALITY");
if(empty($customOptions)){
$customOptions = "";
}
if(!empty($customEnvPath)){
putenv("PATH=".getenv("PATH").":".$customEnvPath);
}
$params = ($this->extractAll?"-quality ".$viewerQuality:"-resize 250 ".$customOptions." -quality ".$thumbQuality);
$cmd = $this->getFilteredOption("IMAGE_MAGICK_CONVERT")." ".escapeshellarg(($masterFile).$pageLimit)." ".$params." ".escapeshellarg($tmpFileThumb);
AJXP_Logger::debug("IMagick Command : $cmd");
session_write_close(); // Be sure to give the hand back
exec($cmd, $out, $return);
if(is_array($out) && count($out)){
throw new AJXP_Exception(implode("\n", $out));
}
if(!$this->extractAll){
rename($tmpFileThumb, $targetFile);
if($isStream){
AJXP_Logger::debug("Copy preview file to remote", $backToStreamTarget);
copy($targetFile, $backToStreamTarget);
unlink($targetFile);
}
}else{
if($isStream){
if(is_file(str_replace(".$extension", "", $targetFile))){
$targetFile = str_replace(".$extension", "", $targetFile);
}
if(is_file($targetFile)){
AJXP_Logger::debug("Copy preview file to remote", $backToStreamTarget);
copy($targetFile, $backToStreamTarget);
unlink($targetFile);
}
AJXP_Logger::debug("Searching for ", str_replace(".jpg", "-0.jpg", $tmpFileThumb));
$i = 0;
while(file_exists(str_replace(".jpg", "-$i.jpg", $tmpFileThumb))){
$page = str_replace(".jpg", "-$i.jpg", $tmpFileThumb);
$remote_page = str_replace(".$extension", "-$i.jpg", $backToStreamTarget);
AJXP_Logger::debug("Copy preview file to remote", $remote_page);
copy($page, $remote_page);
unlink($page);
$i++;
}
}
}
return true;
}
protected function handleMime($filename){
$mimesAtt = explode(",", $this->xPath->query("@mimes")->item(0)->nodeValue);
$ext = strtolower(pathinfo($filename, PATHINFO_EXTENSION));
return in_array($ext, $mimesAtt);
}
protected function countPages($file)
{
$ext = strtolower(pathinfo($file, PATHINFO_EXTENSION));
if($ext != "pdf") return 20;
if(!file_exists($file))return null;
if (!$fp = @fopen($file,"r"))return null;
$max=0;
while(!feof($fp)) {
$line = fgets($fp, 255);
if (preg_match('/\/Count [0-9]+/', $line, $matches)){
preg_match('/[0-9]+/',$matches[0], $matches2);
if ($max<$matches2[0]) $max=$matches2[0];
}
}
fclose($fp);
return (int)$max;
}
}
?>