453 lines
18 KiB
PHP
453 lines
18 KiB
PHP
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<?php
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/*
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* @link http://kodcloud.com/
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* @author warlee | e-mail:kodcloud@qq.com
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* @copyright warlee 2014.(Shanghai)Co.,Ltd
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* @license http://kodcloud.com/tools/license/license.txt
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*/
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/**
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* 解析获取pdf文件信息;
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*
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* pdfparser https://www.pdfparser.org/documentation
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* mpdf编辑: http://mpdf.github.io/
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*/
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class FileParsePdf{
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public static function parse($filePath){
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$chunkSize = 32 * 1024;//trailer处理;
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$fileInfo = array(
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'fp' => fopen($filePath,'r'),
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'path' => $filePath,
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'size' => filesize_64($filePath),
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'chunkSize' => $chunkSize,
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);
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$fileInfo['dataStart'] = StreamWrapperIO::read($filePath,0,$chunkSize);
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$fileInfo['dataEnd'] = StreamWrapperIO::read($filePath,$fileInfo['size'] - $chunkSize,$chunkSize);
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// if($_GET['debug'] == '1'){
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// include('/Library/WebServer/Documents/localhost/test/000/test/pdfparser-0.18.1/vendor/autoload.php');
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// $parser = new \Smalot\PdfParser\Parser();
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// $pdf = $parser->parseFile($filePath);pr($pdf->getDetails());exit;
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// }
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$xref = self::decodeXref($fileInfo);
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if($xref){
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$infoKey = $xref['trailer']['info'];
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$dataInfo = self::getObjectValue($fileInfo,$xref,$infoKey);
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}
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$dataInfo = is_array($dataInfo) ? $dataInfo : array();
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// 页面尺寸处理;
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$dataInfo['sizeWidth'] = 0;
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$theReg = '/[\s]*\/MediaBox[\s]*\[[\s]*([0-9\.]+)[\s]+([0-9\.]+)[\s]+([0-9\.]+)[\s]+([0-9\.]+)[\s]*\]/i';
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preg_match($theReg,$fileInfo['dataStart'],$matches);
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if (!$dataInfo['sizeWidth'] && count($matches) == 5){
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$dataInfo['sizeWidth'] = $matches[3];
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$dataInfo['sizeHeight'] = $matches[4];
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}
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preg_match($theReg,$fileInfo['dataEnd'],$matches);
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if (!$dataInfo['sizeWidth'] && count($matches) == 5){
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$dataInfo['sizeWidth'] = $matches[3];
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$dataInfo['sizeHeight'] = $matches[4];
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}
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preg_match('/%PDF-([0-9\.]+)/',$fileInfo['dataStart'],$matches);
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if($matches){$dataInfo['version'] = $matches[1];}
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// // 页数计算处理; /Count 8
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$dataInfo['pageNumber'] = 0;
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$theReg = "/[\s]*\/Count[\s]+([0-9]+)[\s]*/i";
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preg_match_all($theReg,$fileInfo['dataStart'],$matches);
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if($matches[1] && $dataInfo['pageNumber'] < $matches[1][0]){
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$dataInfo['pageNumber'] = $matches[1][0];
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}
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preg_match_all($theReg,$fileInfo['dataEnd'],$matches);
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if($matches[1] && $dataInfo['pageNumber'] < $matches[1][0]){
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$dataInfo['pageNumber'] = $matches[1][0];
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}
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$dataInfo = self::parseInfoItem($dataInfo);
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return $dataInfo;
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}
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private static function parseInfoItem($dataInfo){
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if(!$dataInfo) return false;
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$picker = array( //数值统一筛选并处理;
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'title' => array('Title',''), // 标题
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'auther' => array('Author',''), // 作者
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'createTime' => array('CreationDate','date'), // 创建日期
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'modifyTime' => array('ModDate','date'), // 修改日期
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'pageNumber' => array('pageNumber','int'), // 页数
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'sizeWidth' => array('sizeWidth','int'), // 页面宽度
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'sizeHeight' => array('sizeHeight','int'), // 页面高度
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'creator' => array('Creator',''), // 内容创作者
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'producer' => array('Producer',''), // 编码软件
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'pdfVersion' => array('version',''), // PDF 版本;
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);
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$result = array();
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foreach ($picker as $key => $info){
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if(!isset($dataInfo[$info[0]])) continue;
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$value = $dataInfo[$info[0]];
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if(!$value || is_array($value)) continue;
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switch($info[1]){
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case 'int' :$value = intval($value);break;
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case 'date':
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if(substr($value,0,2) == 'D:') {
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$value = substr($value,2,14);
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}
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if(strtotime($value)){
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$value = date('Y-m-d H:i:s',strtotime($value));
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}
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break;
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}
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$result[$key] = $value;
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}
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// pr($result,$dataInfo);exit;
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return $result;
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}
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private static function decodeXref(&$fileInfo){
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$pdfData = $fileInfo['dataEnd'];
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$xref = array('trailer'=>array(),'xref'=>array());
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$theReg = '/[\r\n]startxref[\s]*[\r\n]*([0-9]+)[\s]*[\r\n]+%%EOF/i';
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if(!preg_match_all($theReg,$pdfData, $matches,PREG_SET_ORDER,0)) return false;
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// 结尾block索引开始位置,比最小block小则加大;
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$startxref = intval($matches[0][1]);
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if($fileInfo['size'] - $startxref > $fileInfo['chunkSize']){
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$chunkSize = 4 * $fileInfo['chunkSize'];
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$fileInfo['chunkSize'] = $chunkSize;
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$fileInfo['dataStart'] = StreamWrapperIO::read($fileInfo['path'],0,$chunkSize);
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$fileInfo['dataEnd'] = StreamWrapperIO::read($fileInfo['path'],$fileInfo['size'] - $chunkSize,$chunkSize);
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$pdfData = $fileInfo['dataEnd'];
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}
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$objNum = 0;
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// preg_match_all('/([0-9]+)[\x20]([0-9]+)[\x20]?([nf]?)(\r\n|[\x20]?[\r\n])/',$pdfData,$matches);
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preg_match_all('/([0-9]+)[\x20]([0-9]+)[\x20]?([nf]?)(\r\n|[\x20]?[\r\n])/',$pdfData,$matches);
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foreach ($matches[3] as $i=>$item){
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if($matches[3][$i] == 'n'){
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$index = $objNum.'_'.intval($matches[2][$i]);
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$xref['xref'][$index] = intval($matches[1][$i]);
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++$objNum;
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}else if ($matches[3][$i] == 'f') {
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++$objNum;
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} else {
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// $objNum = intval($matches[1][$i]); //从1开始;
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}
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}
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// 没有索引的情况处理; 优先按照的的进行匹配;
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if(preg_match_all('/[\r\n]([0-9]+)[\s]+([0-9]+)[\s]+obj/iU',$pdfData, $matches)){
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$fileOffset = $fileInfo['size'] - $fileInfo['chunkSize'];
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foreach ($matches[0] as $i => $theValue) {
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$key = $matches[1][$i].'_'.$matches[2][$i];
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$xref['xref'][$key] = strpos($pdfData,$theValue) + $fileOffset + 1;
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}
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}
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if(preg_match_all('/trailer[\s]*<<(.*)>>/isU',$pdfData,$matches)){
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$trailerData = count($matches[1]) == 1 ? $matches[1][0] : $matches[1][1];
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}else{// 兼容没有trailer情况的数据; 直接从文件最后正则匹配查找;
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$trailerData = substr($pdfData, -1024*5);
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}
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if (preg_match('/Size[\s]+([0-9]+)/i', $trailerData, $matches) > 0) {
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$xref['trailer']['size'] = intval($matches[1]);
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}
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if (preg_match('/Root[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailerData, $matches) > 0) {
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$xref['trailer']['root'] = intval($matches[1]).'_'.intval($matches[2]);
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}
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if (preg_match('/Encrypt[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailerData, $matches) > 0) {
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$xref['trailer']['encrypt'] = intval($matches[1]).'_'.intval($matches[2]);
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}
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if (preg_match('/Info[\s]+([0-9]+)[\s]+([0-9]+)[\s]+R/i', $trailerData, $matches) > 0) {
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$xref['trailer']['info'] = intval($matches[1]).'_'.intval($matches[2]);
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}
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if (preg_match('/ID[\s]*[\[][\s]*[<]([^>]*)[>][\s]*[<]([^>]*)[>]/i', $trailerData, $matches) > 0) {
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$xref['trailer']['id'] = array();
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$xref['trailer']['id'][0] = $matches[1];
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$xref['trailer']['id'][1] = $matches[2];
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}
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if(!$xref['trailer']['info']) return false;
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if (preg_match('/Prev[\s]+([0-9]+)/i', $trailerData, $matches) > 0) {
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// $xref = self::decodeXref($pdfData,intval($matches[1]), $xref);
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}
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return $xref;
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}
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private static function getObjectValue($fileInfo,$xref,$infoKey){
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$dataInfoRef = self::getObject($fileInfo,$xref['xref'][$infoKey]);
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// pr($infoKey,$dataInfoRef);
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if(is_string($dataInfoRef[1])) return $dataInfoRef[1];
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if(!is_array($dataInfoRef[1])) return array();
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$dataInfo = array();
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for ($i = 0; $i< count($dataInfoRef[1]);$i+=2){
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$itemKey = $dataInfoRef[1][$i];
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$itemValue = $dataInfoRef[1][$i+1];
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if(count($itemKey) == 3 && $itemKey[0] == '/'){
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$value = false;
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if($itemValue[0] == 'objref'){
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$itemValue = self::getObject($fileInfo,$xref['xref'][$itemValue[1]]);
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}
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$value = $itemValue[1];
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if($value === false) continue;
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if(is_string($value)){
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$value = self::decodeStr($value);
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}
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$dataInfo[$itemKey[1]] = $value;
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}
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}
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return $dataInfo;
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}
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private static function getObject($fileInfo,$offset){
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$dataIndex = self::getObjectItem($fileInfo,$offset);
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$dataIndex = self::getObjectItem($fileInfo,$dataIndex[2]);
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return $dataIndex;
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}
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private static function getObjectItem($fileInfo,$offset){
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// return self::getRawObject($fileInfo['dataEnd'],$offset);
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$chunkSize = $fileInfo['chunkSize'];
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$fileOffset = $fileInfo['size'] - $chunkSize;
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$thePose = $offset >= $fileOffset ? ($offset - $fileOffset) : $offset;
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$theData = $offset >= $fileOffset ? $fileInfo['dataEnd']: $fileInfo['dataStart'];
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if($offset > $chunkSize && $offset <= $fileOffset ){
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$thePose = 0;
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$theData = StreamWrapperIO::read($fileInfo['path'],$offset,$chunkSize);
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// pr("getFile:$offset;$chunkSize",substr($theData,200));
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}
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$dataIndex = self::getRawObject($theData,$thePose);
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// 重置offset;
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if($offset >= $fileOffset){
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$dataIndex[2] = $dataIndex[2] + $fileOffset;
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}else if($offset > $chunkSize && $offset <= $fileOffset){
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$dataIndex[2] = $dataIndex[2] + $offset;
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}
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// pr('getObjectItem:',[$offset,$chunkSize,$fileOffset,$thePose],$dataIndex);
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return $dataIndex;
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}
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// 解析节点数据;(xxx xx obj)
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private static function decodeStr($text){
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$text = str_replace(
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['\\\\', '\\ ', '\\/', '\(', '\)', '\n', '\r', '\t'],
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['\\', ' ', '/', '(', ')', "\n", "\r", "\t"],$text);
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$parts = preg_split('/(\\\\\d{3})/s', $text, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
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$text = '';
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foreach ($parts as $part) {
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if (preg_match('/^\\\\\d{3}$/', $part)) {
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$text .= \chr(octdec(trim($part, '\\')));
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} else {
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$text .= $part;
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}
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}
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$parts = preg_split('/(#\d{2})/s', $text, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
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$text = '';
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foreach ($parts as $part) {
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if (preg_match('/^#\d{2}$/', $part)) {
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$text .= \chr(hexdec(trim($part, '#')));
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} else {
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$text .= $part;
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}
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}
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$parts = preg_split('/(<[a-f0-9]+>)/si', $text, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
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$text = '';
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foreach ($parts as $part) {
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if (preg_match('/^<.*>$/s', $part) && false === stripos($part, '<?xml')) {
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$part = preg_replace("/[\r\n]/", '', $part);
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$part = trim($part, '<>');
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$part = pack('H*', $part);
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$text .= $part;
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} else {
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$text .= $part;
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}
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}
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if(preg_match('/^\xFE\xFF/i', $text)) {
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// Strip U+FEFF byte order marker.
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$decode = substr($text, 2);
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$text = '';
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$length = strlen($decode);
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for ($i = 0; $i < $length; $i += 2) {
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$hex = hexdec(bin2hex(substr($decode, $i, 2)));
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$text .= mb_convert_encoding('&#'.intval($hex).';', 'UTF-8', 'HTML-ENTITIES');
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}
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}
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return $text;
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}
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private static function getRawObject($pdfData, $offset = 0){
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$objtype = ''; // object type to be returned
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$objval = ''; // object value to be returned
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/*
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* skip initial white space chars:
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* \x00 null (NUL)
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* \x09 horizontal tab (HT)
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* \x0A line feed (LF)
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* \x0C form feed (FF)
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* \x0D carriage return (CR)
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* \x20 space (SP)
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*/
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$offset += strspn($pdfData, "\x00\x09\x0a\x0c\x0d\x20", $offset);
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$char = $pdfData[$offset];
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// echo "<pre>";var_dump($char,'pos='.$offset.';len='.strlen($pdfData),substr($pdfData,$offset,33));echo "</pre>";
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switch ($char) {
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case '%': // \x25 PERCENT SIGN
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// skip comment and search for next token
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$next = strcspn($pdfData, "\r\n", $offset);
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if ($next > 0) {
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$offset += $next;
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return self::getRawObject($pdfData, $offset);
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}
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break;
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case '/': // \x2F SOLIDUS
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$objtype = $char;
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++$offset;
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$pregResult = preg_match(
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||
|
|
'/^([^\x00\x09\x0a\x0c\x0d\x20\s\x28\x29\x3c\x3e\x5b\x5d\x7b\x7d\x2f\x25]+)/',
|
||
|
|
substr($pdfData, $offset, 256),
|
||
|
|
$matches
|
||
|
|
);
|
||
|
|
if (1 == $pregResult) {
|
||
|
|
$objval = $matches[1]; // unescaped value
|
||
|
|
$offset += strlen($objval);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case '(': // \x28 LEFT PARENTHESIS
|
||
|
|
case ')': // \x29 RIGHT PARENTHESIS
|
||
|
|
// literal string object
|
||
|
|
$objtype = $char;
|
||
|
|
++$offset;
|
||
|
|
$strpos = $offset;
|
||
|
|
if ('(' == $char) {
|
||
|
|
$open_bracket = 1;
|
||
|
|
while ($open_bracket > 0) {
|
||
|
|
if (!isset($pdfData[$strpos])) break;
|
||
|
|
$ch = $pdfData[$strpos];
|
||
|
|
switch ($ch) {
|
||
|
|
case '\\': // REVERSE SOLIDUS (5Ch) (Backslash)
|
||
|
|
// skip next character
|
||
|
|
++$strpos;
|
||
|
|
break;
|
||
|
|
case '(': // LEFT PARENHESIS (28h)
|
||
|
|
++$open_bracket;
|
||
|
|
break;
|
||
|
|
case ')': // RIGHT PARENTHESIS (29h)
|
||
|
|
--$open_bracket;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
++$strpos;
|
||
|
|
}
|
||
|
|
$objval = substr($pdfData, $offset, ($strpos - $offset - 1));
|
||
|
|
$offset = $strpos;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case '[': // \x5B LEFT SQUARE BRACKET
|
||
|
|
case ']': // \x5D RIGHT SQUARE BRACKET
|
||
|
|
// array object
|
||
|
|
$objtype = $char;
|
||
|
|
++$offset;
|
||
|
|
if ('[' == $char) {
|
||
|
|
// get array content
|
||
|
|
$objval = array();
|
||
|
|
do {
|
||
|
|
$oldOffset = $offset;
|
||
|
|
// get element
|
||
|
|
$element = self::getRawObject($pdfData, $offset);
|
||
|
|
$offset = $element[2];
|
||
|
|
$objval[] = $element;
|
||
|
|
} while ((']' != $element[0]) && ($offset != $oldOffset));
|
||
|
|
// remove closing delimiter
|
||
|
|
array_pop($objval);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case '<': // \x3C LESS-THAN SIGN
|
||
|
|
case '>': // \x3E GREATER-THAN SIGN
|
||
|
|
if (isset($pdfData[($offset + 1)]) && ($pdfData[($offset + 1)] == $char)) {
|
||
|
|
// dictionary object
|
||
|
|
$objtype = $char.$char;
|
||
|
|
$offset += 2;
|
||
|
|
if ('<' == $char) {
|
||
|
|
$objval = array();
|
||
|
|
do {
|
||
|
|
$oldOffset = $offset;
|
||
|
|
// get element
|
||
|
|
$element = self::getRawObject($pdfData, $offset);
|
||
|
|
$offset = $element[2];
|
||
|
|
$objval[] = $element;
|
||
|
|
} while (('>>' != $element[0]) && ($offset != $oldOffset));
|
||
|
|
// remove closing delimiter
|
||
|
|
array_pop($objval);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// hexadecimal string object
|
||
|
|
$objtype = $char;
|
||
|
|
++$offset;
|
||
|
|
$pregResult = preg_match('/^([0-9A-Fa-f\x09\x0a\x0c\x0d\x20]+)>/iU',substr($pdfData, $offset),$matches);
|
||
|
|
if (('<' == $char) && 1 == $pregResult) {
|
||
|
|
// remove white space characters
|
||
|
|
$objval = strtr($matches[1], "\x09\x0a\x0c\x0d\x20", '');
|
||
|
|
$offset += \strlen($matches[0]);
|
||
|
|
} elseif (false !== ($endpos = strpos($pdfData, '>', $offset))) {
|
||
|
|
$offset = $endpos + 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if ('endobj' == substr($pdfData, $offset, 6)) {
|
||
|
|
// indirect object
|
||
|
|
$objtype = 'endobj';
|
||
|
|
$offset += 6;
|
||
|
|
} elseif ('null' == substr($pdfData, $offset, 4)) {
|
||
|
|
// null object
|
||
|
|
$objtype = 'null';
|
||
|
|
$offset += 4;
|
||
|
|
$objval = 'null';
|
||
|
|
} elseif ('true' == substr($pdfData, $offset, 4)) {
|
||
|
|
// boolean true object
|
||
|
|
$objtype = 'boolean';
|
||
|
|
$offset += 4;
|
||
|
|
$objval = 'true';
|
||
|
|
} elseif ('false' == substr($pdfData, $offset, 5)) {
|
||
|
|
// boolean false object
|
||
|
|
$objtype = 'boolean';
|
||
|
|
$offset += 5;
|
||
|
|
$objval = 'false';
|
||
|
|
} elseif ('stream' == substr($pdfData, $offset, 6)) {
|
||
|
|
// start stream object
|
||
|
|
$objtype = 'stream';
|
||
|
|
$offset += 6;
|
||
|
|
if (1 == preg_match('/^([\r]?[\n])/isU', substr($pdfData, $offset), $matches)) {
|
||
|
|
$offset += strlen($matches[0]);
|
||
|
|
$endStreamReg = '/(endstream)[\x09\x0a\x0c\x0d\x20]/isU';
|
||
|
|
$pregResult = preg_match($endStreamReg,substr($pdfData, $offset),$matches,PREG_OFFSET_CAPTURE);
|
||
|
|
if (1 == $pregResult) {
|
||
|
|
$objval = substr($pdfData, $offset, $matches[0][1]);
|
||
|
|
$offset += $matches[1][1];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} elseif ('endstream' == substr($pdfData, $offset, 9)) {
|
||
|
|
// end stream object
|
||
|
|
$objtype = 'endstream';
|
||
|
|
$offset += 9;
|
||
|
|
} elseif (1 == preg_match('/^([0-9]+)[\s]+([0-9]+)[\s]+R/iU', substr($pdfData, $offset, 33), $matches)) {
|
||
|
|
$objtype = 'objref';
|
||
|
|
$offset += strlen($matches[0]);
|
||
|
|
$objval = intval($matches[1]).'_'.intval($matches[2]);
|
||
|
|
} elseif (1 == preg_match('/^([0-9]+)[\s]+([0-9]+)[\s]+obj/iU', substr($pdfData, $offset, 33), $matches)) {
|
||
|
|
$objtype = 'obj';
|
||
|
|
$objval = intval($matches[1]).'_'.intval($matches[2]);
|
||
|
|
$offset += strlen($matches[0]);
|
||
|
|
} elseif (($numlen = strspn($pdfData, '+-.0123456789', $offset)) > 0) {
|
||
|
|
$objtype = 'numeric';
|
||
|
|
$objval = substr($pdfData, $offset, $numlen);
|
||
|
|
$offset += $numlen;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return array($objtype, $objval, $offset);
|
||
|
|
}
|
||
|
|
}
|