1003 lines
31 KiB
PHP
1003 lines
31 KiB
PHP
<?php
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/*
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TbsZip version 2.15
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Date : 2013-10-16
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Author : Skrol29 (email: http://www.tinybutstrong.com/onlyyou.html)
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Licence : LGPL
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This class is independent from any other classes and has been originally created for the OpenTbs plug-in
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for TinyButStrong Template Engine (TBS). OpenTbs makes TBS able to merge OpenOffice and Ms Office documents.
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Visit http://www.tinybutstrong.com
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*/
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define('TBSZIP_DOWNLOAD',1); // download (default)
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define('TBSZIP_NOHEADER',4); // option to use with DOWNLOAD: no header is sent
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define('TBSZIP_FILE',8); // output to file , or add from file
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define('TBSZIP_STRING',32); // output to string, or add from string
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class clsTbsZip {
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function __construct() {
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$this->Meth8Ok = extension_loaded('zlib'); // check if Zlib extension is available. This is need for compress and uncompress with method 8.
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$this->DisplayError = true;
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$this->ArchFile = '';
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$this->Error = false;
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}
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function CreateNew($ArchName='new.zip') {
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// Create a new virtual empty archive, the name will be the default name when the archive is flushed.
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if (!isset($this->Meth8Ok)) $this->__construct(); // for PHP 4 compatibility
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$this->Close(); // note that $this->ArchHnd is set to false here
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$this->Error = false;
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$this->ArchFile = $ArchName;
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$this->ArchIsNew = true;
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$bin = 'PK'.chr(05).chr(06).str_repeat(chr(0), 18);
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$this->CdEndPos = strlen($bin) - 4;
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$this->CdInfo = array('disk_num_curr'=>0, 'disk_num_cd'=>0, 'file_nbr_curr'=>0, 'file_nbr_tot'=>0, 'l_cd'=>0, 'p_cd'=>0, 'l_comm'=>0, 'v_comm'=>'', 'bin'=>$bin);
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$this->CdPos = $this->CdInfo['p_cd'];
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}
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function Open($ArchFile, $UseIncludePath=false) {
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// Open the zip archive
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if (!isset($this->Meth8Ok)) $this->__construct(); // for PHP 4 compatibility
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$this->Close(); // close handle and init info
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$this->Error = false;
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$this->ArchIsNew = false;
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$this->ArchIsStream = (is_resource($ArchFile) && (get_resource_type($ArchFile)=='stream'));
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if ($this->ArchIsStream) {
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$this->ArchFile = 'from_stream.zip';
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$this->ArchHnd = $ArchFile;
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} else {
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// open the file
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$this->ArchFile = $ArchFile;
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$this->ArchHnd = fopen($ArchFile, 'rb', $UseIncludePath);
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}
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$ok = !($this->ArchHnd===false);
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if ($ok) $ok = $this->CentralDirRead();
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return $ok;
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}
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function Close() {
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if (isset($this->ArchHnd) and ($this->ArchHnd!==false)) fclose($this->ArchHnd);
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$this->ArchFile = '';
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$this->ArchHnd = false;
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$this->CdInfo = array();
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$this->CdFileLst = array();
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$this->CdFileNbr = 0;
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$this->CdFileByName = array();
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$this->VisFileLst = array();
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$this->ArchCancelModif();
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}
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function ArchCancelModif() {
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$this->LastReadComp = false; // compression of the last read file (1=compressed, 0=stored not compressed, -1= stored compressed but read uncompressed)
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$this->LastReadIdx = false; // index of the last file read
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$this->ReplInfo = array();
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$this->ReplByPos = array();
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$this->AddInfo = array();
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}
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function FileAdd($Name, $Data, $DataType=TBSZIP_STRING, $Compress=true) {
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if ($Data===false) return $this->FileCancelModif($Name, false); // Cancel a previously added file
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// Save information for adding a new file into the archive
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$Diff = 30 + 46 + 2*strlen($Name); // size of the header + cd info
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$Ref = $this->_DataCreateNewRef($Data, $DataType, $Compress, $Diff, $Name);
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if ($Ref===false) return false;
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$Ref['name'] = $Name;
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$this->AddInfo[] = $Ref;
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return $Ref['res'];
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}
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function CentralDirRead() {
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$cd_info = 'PK'.chr(05).chr(06); // signature of the Central Directory
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$cd_pos = -22;
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$this->_MoveTo($cd_pos, SEEK_END);
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$b = $this->_ReadData(4);
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if ($b===$cd_info) {
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$this->CdEndPos = ftell($this->ArchHnd) - 4;
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} else {
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$p = $this->_FindCDEnd($cd_info);
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//echo 'p='.var_export($p,true); exit;
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if ($p===false) {
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return $this->RaiseError('The End of Central Directory Record is not found.');
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} else {
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$this->CdEndPos = $p;
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$this->_MoveTo($p+4);
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}
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}
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$this->CdInfo = $this->CentralDirRead_End($cd_info);
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$this->CdFileLst = array();
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$this->CdFileNbr = $this->CdInfo['file_nbr_curr'];
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$this->CdPos = $this->CdInfo['p_cd'];
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if ($this->CdFileNbr<=0) return $this->RaiseError('No header found in the Central Directory.');
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if ($this->CdPos<=0) return $this->RaiseError('No position found for the Central Directory.');
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$this->_MoveTo($this->CdPos);
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for ($i=0;$i<$this->CdFileNbr;$i++) {
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$x = $this->CentralDirRead_File($i);
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if ($x!==false) {
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$this->CdFileLst[$i] = $x;
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$this->CdFileByName[$x['v_name']] = $i;
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}
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}
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return true;
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}
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function CentralDirRead_End($cd_info) {
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$b = $cd_info.$this->_ReadData(18);
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$x = array();
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$x['disk_num_curr'] = $this->_GetDec($b,4,2); // number of this disk
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$x['disk_num_cd'] = $this->_GetDec($b,6,2); // number of the disk with the start of the central directory
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$x['file_nbr_curr'] = $this->_GetDec($b,8,2); // total number of entries in the central directory on this disk
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$x['file_nbr_tot'] = $this->_GetDec($b,10,2); // total number of entries in the central directory
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$x['l_cd'] = $this->_GetDec($b,12,4); // size of the central directory
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$x['p_cd'] = $this->_GetDec($b,16,4); // position of start of central directory with respect to the starting disk number
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$x['l_comm'] = $this->_GetDec($b,20,2); // .ZIP file comment length
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$x['v_comm'] = $this->_ReadData($x['l_comm']); // .ZIP file comment
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$x['bin'] = $b.$x['v_comm'];
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return $x;
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}
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function CentralDirRead_File($idx) {
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$b = $this->_ReadData(46);
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$x = $this->_GetHex($b,0,4);
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if ($x!=='h:02014b50') return $this->RaiseError("Signature of Central Directory Header #".$idx." (file information) expected but not found at position ".$this->_TxtPos(ftell($this->ArchHnd) - 46).".");
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$x = array();
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$x['vers_used'] = $this->_GetDec($b,4,2);
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$x['vers_necess'] = $this->_GetDec($b,6,2);
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$x['purp'] = $this->_GetBin($b,8,2);
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$x['meth'] = $this->_GetDec($b,10,2);
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$x['time'] = $this->_GetDec($b,12,2);
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$x['date'] = $this->_GetDec($b,14,2);
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$x['crc32'] = $this->_GetDec($b,16,4);
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$x['l_data_c'] = $this->_GetDec($b,20,4);
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$x['l_data_u'] = $this->_GetDec($b,24,4);
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$x['l_name'] = $this->_GetDec($b,28,2);
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$x['l_fields'] = $this->_GetDec($b,30,2);
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$x['l_comm'] = $this->_GetDec($b,32,2);
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$x['disk_num'] = $this->_GetDec($b,34,2);
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$x['int_file_att'] = $this->_GetDec($b,36,2);
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$x['ext_file_att'] = $this->_GetDec($b,38,4);
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$x['p_loc'] = $this->_GetDec($b,42,4);
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$x['v_name'] = $this->_ReadData($x['l_name']);
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$x['v_fields'] = $this->_ReadData($x['l_fields']);
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$x['v_comm'] = $this->_ReadData($x['l_comm']);
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$x['bin'] = $b.$x['v_name'].$x['v_fields'].$x['v_comm'];
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return $x;
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}
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function RaiseError($Msg) {
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if ($this->DisplayError) {
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if (PHP_SAPI==='cli') {
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echo get_class($this).' ERROR with the zip archive: '.$Msg."\r\n";
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} else {
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echo '<strong>'.get_class($this).' ERROR with the zip archive:</strong> '.$Msg.'<br>'."\r\n";
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}
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}
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$this->Error = $Msg;
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return false;
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}
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function Debug($FileHeaders=false) {
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$this->DisplayError = true;
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if ($FileHeaders) {
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// Calculations first in order to have error messages before other information
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$idx = 0;
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$pos = 0;
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$pos_stop = $this->CdInfo['p_cd'];
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$this->_MoveTo($pos);
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while ( ($pos<$pos_stop) && ($ok = $this->_ReadFile($idx,false)) ) {
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$this->VisFileLst[$idx]['p_this_header (debug_mode only)'] = $pos;
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$pos = ftell($this->ArchHnd);
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$idx++;
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}
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}
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$nl = "\r\n";
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echo "<pre>";
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echo "-------------------------------".$nl;
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echo "End of Central Directory record".$nl;
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echo "-------------------------------".$nl;
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print_r($this->DebugArray($this->CdInfo));
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echo $nl;
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echo "-------------------------".$nl;
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echo "Central Directory headers".$nl;
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echo "-------------------------".$nl;
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print_r($this->DebugArray($this->CdFileLst));
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if ($FileHeaders) {
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echo $nl;
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echo "------------------".$nl;
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echo "Local File headers".$nl;
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echo "------------------".$nl;
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print_r($this->DebugArray($this->VisFileLst));
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}
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echo "</pre>";
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}
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function DebugArray($arr) {
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foreach ($arr as $k=>$v) {
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if (is_array($v)) {
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$arr[$k] = $this->DebugArray($v);
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} elseif (substr($k,0,2)=='p_') {
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$arr[$k] = $this->_TxtPos($v);
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}
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}
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return $arr;
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}
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function FileExists($NameOrIdx) {
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return ($this->FileGetIdx($NameOrIdx)!==false);
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}
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function FileGetIdx($NameOrIdx) {
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// Check if a file name, or a file index exists in the Central Directory, and return its index
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if (is_string($NameOrIdx)) {
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if (isset($this->CdFileByName[$NameOrIdx])) {
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return $this->CdFileByName[$NameOrIdx];
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} else {
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return false;
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}
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} else {
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if (isset($this->CdFileLst[$NameOrIdx])) {
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return $NameOrIdx;
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} else {
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return false;
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}
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}
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}
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function FileGetIdxAdd($Name) {
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// Check if a file name exists in the list of file to add, and return its index
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if (!is_string($Name)) return false;
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$idx_lst = array_keys($this->AddInfo);
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foreach ($idx_lst as $idx) {
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if ($this->AddInfo[$idx]['name']===$Name) return $idx;
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}
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return false;
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}
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function FileRead($NameOrIdx, $Uncompress=true) {
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$this->LastReadComp = false; // means the file is not found
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$this->LastReadIdx = false;
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$idx = $this->FileGetIdx($NameOrIdx);
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if ($idx===false) return $this->RaiseError('File "'.$NameOrIdx.'" is not found in the Central Directory.');
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$pos = $this->CdFileLst[$idx]['p_loc'];
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$this->_MoveTo($pos);
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$this->LastReadIdx = $idx; // Can be usefull to get the idx
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$Data = $this->_ReadFile($idx, true);
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// Manage uncompression
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$Comp = 1; // means the contents stays compressed
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$meth = $this->CdFileLst[$idx]['meth'];
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if ($meth==8) {
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if ($Uncompress) {
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if ($this->Meth8Ok) {
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$Data = gzinflate($Data);
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$Comp = -1; // means uncompressed
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} else {
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$this->RaiseError('Unable to uncompress file "'.$NameOrIdx.'" because extension Zlib is not installed.');
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}
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}
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} elseif($meth==0) {
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$Comp = 0; // means stored without compression
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} else {
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if ($Uncompress) $this->RaiseError('Unable to uncompress file "'.$NameOrIdx.'" because it is compressed with method '.$meth.'.');
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}
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$this->LastReadComp = $Comp;
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return $Data;
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}
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function _ReadFile($idx, $ReadData) {
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// read the file header (and maybe the data ) in the archive, assuming the cursor in at a new file position
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$b = $this->_ReadData(30);
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$x = $this->_GetHex($b,0,4);
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if ($x!=='h:04034b50') return $this->RaiseError("Signature of Local File Header #".$idx." (data section) expected but not found at position ".$this->_TxtPos(ftell($this->ArchHnd)-30).".");
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$x = array();
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$x['vers'] = $this->_GetDec($b,4,2);
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$x['purp'] = $this->_GetBin($b,6,2);
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$x['meth'] = $this->_GetDec($b,8,2);
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$x['time'] = $this->_GetDec($b,10,2);
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$x['date'] = $this->_GetDec($b,12,2);
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$x['crc32'] = $this->_GetDec($b,14,4);
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$x['l_data_c'] = $this->_GetDec($b,18,4);
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$x['l_data_u'] = $this->_GetDec($b,22,4);
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$x['l_name'] = $this->_GetDec($b,26,2);
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$x['l_fields'] = $this->_GetDec($b,28,2);
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$x['v_name'] = $this->_ReadData($x['l_name']);
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$x['v_fields'] = $this->_ReadData($x['l_fields']);
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$x['bin'] = $b.$x['v_name'].$x['v_fields'];
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// Read Data
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if (isset($this->CdFileLst[$idx])) {
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$len_cd = $this->CdFileLst[$idx]['l_data_c'];
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if ($x['l_data_c']==0) {
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// Sometimes, the size is not specified in the local information.
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$len = $len_cd;
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} else {
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$len = $x['l_data_c'];
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if ($len!=$len_cd) {
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//echo "TbsZip Warning: Local information for file #".$idx." says len=".$len.", while Central Directory says len=".$len_cd.".";
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}
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}
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} else {
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$len = $x['l_data_c'];
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if ($len==0) $this->RaiseError("File Data #".$idx." cannt be read because no length is specified in the Local File Header and its Central Directory information has not been found.");
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}
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if ($ReadData) {
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$Data = $this->_ReadData($len);
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} else {
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$this->_MoveTo($len, SEEK_CUR);
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}
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// Description information
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$desc_ok = ($x['purp'][2+3]=='1');
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if ($desc_ok) {
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$b = $this->_ReadData(12);
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$s = $this->_GetHex($b,0,4);
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$d = 0;
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// the specification says the signature may or may not be present
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if ($s=='h:08074b50') {
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$b .= $this->_ReadData(4);
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$d = 4;
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$x['desc_bin'] = $b;
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$x['desc_sign'] = $s;
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} else {
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$x['desc_bin'] = $b;
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}
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$x['desc_crc32'] = $this->_GetDec($b,0+$d,4);
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$x['desc_l_data_c'] = $this->_GetDec($b,4+$d,4);
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$x['desc_l_data_u'] = $this->_GetDec($b,8+$d,4);
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}
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// Save file info without the data
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$this->VisFileLst[$idx] = $x;
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// Return the info
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if ($ReadData) {
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return $Data;
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} else {
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return true;
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}
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}
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function FileReplace($NameOrIdx, $Data, $DataType=TBSZIP_STRING, $Compress=true) {
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// Store replacement information.
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$idx = $this->FileGetIdx($NameOrIdx);
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if ($idx===false) return $this->RaiseError('File "'.$NameOrIdx.'" is not found in the Central Directory.');
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$pos = $this->CdFileLst[$idx]['p_loc'];
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if ($Data===false) {
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// file to delete
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$this->ReplInfo[$idx] = false;
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$Result = true;
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} else {
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// file to replace
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$Diff = - $this->CdFileLst[$idx]['l_data_c'];
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$Ref = $this->_DataCreateNewRef($Data, $DataType, $Compress, $Diff, $NameOrIdx);
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if ($Ref===false) return false;
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$this->ReplInfo[$idx] = $Ref;
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$Result = $Ref['res'];
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}
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$this->ReplByPos[$pos] = $idx;
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return $Result;
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}
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/**
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* Return the state of the file.
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* @return {string} 'u'=unchanged, 'm'=modified, 'd'=deleted, 'a'=added, false=unknown
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*/
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function FileGetState($NameOrIdx) {
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$idx = $this->FileGetIdx($NameOrIdx);
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if ($idx===false) {
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$idx = $this->FileGetIdxAdd($NameOrIdx);
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if ($idx===false) {
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return false;
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} else {
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return 'a';
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}
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} elseif (isset($this->ReplInfo[$idx])) {
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if ($this->ReplInfo[$idx]===false) {
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return 'd';
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} else {
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return 'm';
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}
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} else {
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return 'u';
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}
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}
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function FileCancelModif($NameOrIdx, $ReplacedAndDeleted=true) {
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// cancel added, modified or deleted modifications on a file in the archive
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// return the number of cancels
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|
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$nbr = 0;
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if ($ReplacedAndDeleted) {
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// replaced or deleted files
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$idx = $this->FileGetIdx($NameOrIdx);
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if ($idx!==false) {
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if (isset($this->ReplInfo[$idx])) {
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$pos = $this->CdFileLst[$idx]['p_loc'];
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unset($this->ReplByPos[$pos]);
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unset($this->ReplInfo[$idx]);
|
|
$nbr++;
|
|
}
|
|
}
|
|
}
|
|
|
|
// added files
|
|
$idx = $this->FileGetIdxAdd($NameOrIdx);
|
|
if ($idx!==false) {
|
|
unset($this->AddInfo[$idx]);
|
|
$nbr++;
|
|
}
|
|
|
|
return $nbr;
|
|
|
|
}
|
|
|
|
function Flush($Render=TBSZIP_DOWNLOAD, $File='', $ContentType='') {
|
|
|
|
if ( ($File!=='') && ($this->ArchFile===$File)) {
|
|
$this->RaiseError('Method Flush() cannot overwrite the current opened archive: \''.$File.'\''); // this makes corrupted zip archives without PHP error.
|
|
return false;
|
|
}
|
|
|
|
$ArchPos = 0;
|
|
$Delta = 0;
|
|
$FicNewPos = array();
|
|
$DelLst = array(); // idx of deleted files
|
|
$DeltaCdLen = 0; // delta of the CD's size
|
|
|
|
$now = time();
|
|
$date = $this->_MsDos_Date($now);
|
|
$time = $this->_MsDos_Time($now);
|
|
|
|
if (!$this->OutputOpen($Render, $File, $ContentType)) return false;
|
|
|
|
// output modified zipped files and unmodified zipped files that are beetween them
|
|
ksort($this->ReplByPos);
|
|
foreach ($this->ReplByPos as $ReplPos => $ReplIdx) {
|
|
// output data from the zip archive which is before the data to replace
|
|
$this->OutputFromArch($ArchPos, $ReplPos);
|
|
// get current file information
|
|
if (!isset($this->VisFileLst[$ReplIdx])) $this->_ReadFile($ReplIdx, false);
|
|
$FileInfo =& $this->VisFileLst[$ReplIdx];
|
|
$b1 = $FileInfo['bin'];
|
|
if (isset($FileInfo['desc_bin'])) {
|
|
$b2 = $FileInfo['desc_bin'];
|
|
} else {
|
|
$b2 = '';
|
|
}
|
|
$info_old_len = strlen($b1) + $this->CdFileLst[$ReplIdx]['l_data_c'] + strlen($b2); // $FileInfo['l_data_c'] may have a 0 value in some archives
|
|
// get replacement information
|
|
$ReplInfo =& $this->ReplInfo[$ReplIdx];
|
|
if ($ReplInfo===false) {
|
|
// The file is to be deleted
|
|
$Delta = $Delta - $info_old_len; // headers and footers are also deleted
|
|
$DelLst[$ReplIdx] = true;
|
|
} else {
|
|
// prepare the header of the current file
|
|
$this->_DataPrepare($ReplInfo); // get data from external file if necessary
|
|
$this->_PutDec($b1, $time, 10, 2); // time
|
|
$this->_PutDec($b1, $date, 12, 2); // date
|
|
$this->_PutDec($b1, $ReplInfo['crc32'], 14, 4); // crc32
|
|
$this->_PutDec($b1, $ReplInfo['len_c'], 18, 4); // l_data_c
|
|
$this->_PutDec($b1, $ReplInfo['len_u'], 22, 4); // l_data_u
|
|
if ($ReplInfo['meth']!==false) $this->_PutDec($b1, $ReplInfo['meth'], 8, 2); // meth
|
|
// prepare the bottom description if the zipped file, if any
|
|
if ($b2!=='') {
|
|
$d = (strlen($b2)==16) ? 4 : 0; // offset because of the signature if any
|
|
$this->_PutDec($b2, $ReplInfo['crc32'], $d+0, 4); // crc32
|
|
$this->_PutDec($b2, $ReplInfo['len_c'], $d+4, 4); // l_data_c
|
|
$this->_PutDec($b2, $ReplInfo['len_u'], $d+8, 4); // l_data_u
|
|
}
|
|
// output data
|
|
$this->OutputFromString($b1.$ReplInfo['data'].$b2);
|
|
unset($ReplInfo['data']); // save PHP memory
|
|
$Delta = $Delta + $ReplInfo['diff'] + $ReplInfo['len_c'];
|
|
}
|
|
// Update the delta of positions for zipped files which are physically after the currently replaced one
|
|
for ($i=0;$i<$this->CdFileNbr;$i++) {
|
|
if ($this->CdFileLst[$i]['p_loc']>$ReplPos) {
|
|
$FicNewPos[$i] = $this->CdFileLst[$i]['p_loc'] + $Delta;
|
|
}
|
|
}
|
|
// Update the current pos in the archive
|
|
$ArchPos = $ReplPos + $info_old_len;
|
|
}
|
|
|
|
// Ouput all the zipped files that remain before the Central Directory listing
|
|
if ($this->ArchHnd!==false) $this->OutputFromArch($ArchPos, $this->CdPos); // ArchHnd is false if CreateNew() has been called
|
|
$ArchPos = $this->CdPos;
|
|
|
|
// Output file to add
|
|
$AddNbr = count($this->AddInfo);
|
|
$AddDataLen = 0; // total len of added data (inlcuding file headers)
|
|
if ($AddNbr>0) {
|
|
$AddPos = $ArchPos + $Delta; // position of the start
|
|
$AddLst = array_keys($this->AddInfo);
|
|
foreach ($AddLst as $idx) {
|
|
$n = $this->_DataOuputAddedFile($idx, $AddPos);
|
|
$AddPos += $n;
|
|
$AddDataLen += $n;
|
|
}
|
|
}
|
|
|
|
// Modifiy file information in the Central Directory for replaced files
|
|
$b2 = '';
|
|
$old_cd_len = 0;
|
|
for ($i=0;$i<$this->CdFileNbr;$i++) {
|
|
$b1 = $this->CdFileLst[$i]['bin'];
|
|
$old_cd_len += strlen($b1);
|
|
if (!isset($DelLst[$i])) {
|
|
if (isset($FicNewPos[$i])) $this->_PutDec($b1, $FicNewPos[$i], 42, 4); // p_loc
|
|
if (isset($this->ReplInfo[$i])) {
|
|
$ReplInfo =& $this->ReplInfo[$i];
|
|
$this->_PutDec($b1, $time, 12, 2); // time
|
|
$this->_PutDec($b1, $date, 14, 2); // date
|
|
$this->_PutDec($b1, $ReplInfo['crc32'], 16, 4); // crc32
|
|
$this->_PutDec($b1, $ReplInfo['len_c'], 20, 4); // l_data_c
|
|
$this->_PutDec($b1, $ReplInfo['len_u'], 24, 4); // l_data_u
|
|
if ($ReplInfo['meth']!==false) $this->_PutDec($b1, $ReplInfo['meth'], 10, 2); // meth
|
|
}
|
|
$b2 .= $b1;
|
|
}
|
|
}
|
|
$this->OutputFromString($b2);
|
|
$ArchPos += $old_cd_len;
|
|
$DeltaCdLen = $DeltaCdLen + strlen($b2) - $old_cd_len;
|
|
|
|
// Output until "end of central directory record"
|
|
if ($this->ArchHnd!==false) $this->OutputFromArch($ArchPos, $this->CdEndPos); // ArchHnd is false if CreateNew() has been called
|
|
|
|
// Output file information of the Central Directory for added files
|
|
if ($AddNbr>0) {
|
|
$b2 = '';
|
|
foreach ($AddLst as $idx) {
|
|
$b2 .= $this->AddInfo[$idx]['bin'];
|
|
}
|
|
$this->OutputFromString($b2);
|
|
$DeltaCdLen += strlen($b2);
|
|
}
|
|
|
|
// Output "end of central directory record"
|
|
$b2 = $this->CdInfo['bin'];
|
|
$DelNbr = count($DelLst);
|
|
if ( ($AddNbr>0) or ($DelNbr>0) ) {
|
|
// total number of entries in the central directory on this disk
|
|
$n = $this->_GetDec($b2, 8, 2);
|
|
$this->_PutDec($b2, $n + $AddNbr - $DelNbr, 8, 2);
|
|
// total number of entries in the central directory
|
|
$n = $this->_GetDec($b2, 10, 2);
|
|
$this->_PutDec($b2, $n + $AddNbr - $DelNbr, 10, 2);
|
|
// size of the central directory
|
|
$n = $this->_GetDec($b2, 12, 4);
|
|
$this->_PutDec($b2, $n + $DeltaCdLen, 12, 4);
|
|
$Delta = $Delta + $AddDataLen;
|
|
}
|
|
$this->_PutDec($b2, $this->CdPos+$Delta , 16, 4); // p_cd (offset of start of central directory with respect to the starting disk number)
|
|
$this->OutputFromString($b2);
|
|
|
|
$this->OutputClose();
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
// ----------------
|
|
// output functions
|
|
// ----------------
|
|
|
|
function OutputOpen($Render, $File, $ContentType) {
|
|
|
|
if (($Render & TBSZIP_FILE)==TBSZIP_FILE) {
|
|
$this->OutputMode = TBSZIP_FILE;
|
|
if (''.$File=='') $File = basename($this->ArchFile).'.zip';
|
|
$this->OutputHandle = @fopen($File, 'w');
|
|
if ($this->OutputHandle===false) {
|
|
return $this->RaiseError('Method Flush() cannot overwrite the target file \''.$File.'\'. This may not be a valid file path or the file may be locked by another process or because of a denied permission.');
|
|
}
|
|
} elseif (($Render & TBSZIP_STRING)==TBSZIP_STRING) {
|
|
$this->OutputMode = TBSZIP_STRING;
|
|
$this->OutputSrc = '';
|
|
} elseif (($Render & TBSZIP_DOWNLOAD)==TBSZIP_DOWNLOAD) {
|
|
$this->OutputMode = TBSZIP_DOWNLOAD;
|
|
// Output the file
|
|
if (''.$File=='') $File = basename($this->ArchFile);
|
|
if (($Render & TBSZIP_NOHEADER)==TBSZIP_NOHEADER) {
|
|
} else {
|
|
header ('Pragma: no-cache');
|
|
if ($ContentType!='') header ('Content-Type: '.$ContentType);
|
|
header('Content-Disposition: attachment; filename="'.$File.'"');
|
|
header('Expires: 0');
|
|
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
|
|
header('Cache-Control: public');
|
|
header('Content-Description: File Transfer');
|
|
header('Content-Transfer-Encoding: binary');
|
|
$Len = $this->_EstimateNewArchSize();
|
|
if ($Len!==false) header('Content-Length: '.$Len);
|
|
}
|
|
} else {
|
|
return $this->RaiseError('Method Flush is called with a unsupported render option.');
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
function OutputFromArch($pos, $pos_stop) {
|
|
$len = $pos_stop - $pos;
|
|
if ($len<0) return;
|
|
$this->_MoveTo($pos);
|
|
$block = 1024;
|
|
while ($len>0) {
|
|
$l = min($len, $block);
|
|
$x = $this->_ReadData($l);
|
|
$this->OutputFromString($x);
|
|
$len = $len - $l;
|
|
}
|
|
unset($x);
|
|
}
|
|
|
|
function OutputFromString($data) {
|
|
if ($this->OutputMode===TBSZIP_DOWNLOAD) {
|
|
echo $data; // donwload
|
|
} elseif ($this->OutputMode===TBSZIP_STRING) {
|
|
$this->OutputSrc .= $data; // to string
|
|
} elseif (TBSZIP_FILE) {
|
|
fwrite($this->OutputHandle, $data); // to file
|
|
}
|
|
}
|
|
|
|
function OutputClose() {
|
|
if ( ($this->OutputMode===TBSZIP_FILE) && ($this->OutputHandle!==false) ) {
|
|
fclose($this->OutputHandle);
|
|
$this->OutputHandle = false;
|
|
}
|
|
}
|
|
|
|
// ----------------
|
|
// Reading functions
|
|
// ----------------
|
|
|
|
function _MoveTo($pos, $relative = SEEK_SET) {
|
|
fseek($this->ArchHnd, $pos, $relative);
|
|
}
|
|
|
|
function _ReadData($len) {
|
|
if ($len>0) {
|
|
$x = fread($this->ArchHnd, $len);
|
|
return $x;
|
|
} else {
|
|
return '';
|
|
}
|
|
}
|
|
|
|
// ----------------
|
|
// Take info from binary data
|
|
// ----------------
|
|
|
|
function _GetDec($txt, $pos, $len) {
|
|
$x = substr($txt, $pos, $len);
|
|
$z = 0;
|
|
for ($i=0;$i<$len;$i++) {
|
|
$asc = ord($x[$i]);
|
|
if ($asc>0) $z = $z + $asc*pow(256,$i);
|
|
}
|
|
return $z;
|
|
}
|
|
|
|
function _GetHex($txt, $pos, $len) {
|
|
$x = substr($txt, $pos, $len);
|
|
return 'h:'.bin2hex(strrev($x));
|
|
}
|
|
|
|
function _GetBin($txt, $pos, $len) {
|
|
$x = substr($txt, $pos, $len);
|
|
$z = '';
|
|
for ($i=0;$i<$len;$i++) {
|
|
$asc = ord($x[$i]);
|
|
if (isset($x[$i])) {
|
|
for ($j=0;$j<8;$j++) {
|
|
$z .= ($asc & pow(2,$j)) ? '1' : '0';
|
|
}
|
|
} else {
|
|
$z .= '00000000';
|
|
}
|
|
}
|
|
return 'b:'.$z;
|
|
}
|
|
|
|
// ----------------
|
|
// Put info into binary data
|
|
// ----------------
|
|
|
|
function _PutDec(&$txt, $val, $pos, $len) {
|
|
$x = '';
|
|
for ($i=0;$i<$len;$i++) {
|
|
if ($val==0) {
|
|
$z = 0;
|
|
} else {
|
|
$z = intval($val % 256);
|
|
if (($val<0) && ($z!=0)) { // ($z!=0) is very important, example: val=-420085702
|
|
// special opration for negative value. If the number id too big, PHP stores it into a signed integer. For example: crc32('coucou') => -256185401 instead of 4038781895. NegVal = BigVal - (MaxVal+1) = BigVal - 256^4
|
|
$val = ($val - $z)/256 -1;
|
|
$z = 256 + $z;
|
|
} else {
|
|
$val = ($val - $z)/256;
|
|
}
|
|
}
|
|
$x .= chr($z);
|
|
}
|
|
$txt = substr_replace($txt, $x, $pos, $len);
|
|
}
|
|
|
|
function _MsDos_Date($Timestamp = false) {
|
|
// convert a date-time timstamp into the MS-Dos format
|
|
$d = ($Timestamp===false) ? getdate() : getdate($Timestamp);
|
|
return (($d['year']-1980)*512) + ($d['mon']*32) + $d['mday'];
|
|
}
|
|
function _MsDos_Time($Timestamp = false) {
|
|
// convert a date-time timstamp into the MS-Dos format
|
|
$d = ($Timestamp===false) ? getdate() : getdate($Timestamp);
|
|
return ($d['hours']*2048) + ($d['minutes']*32) + intval($d['seconds']/2); // seconds are rounded to an even number in order to save 1 bit
|
|
}
|
|
|
|
function _MsDos_Debug($date, $time) {
|
|
// Display the formated date and time. Just for debug purpose.
|
|
// date end time are encoded on 16 bits (2 bytes) : date = yyyyyyymmmmddddd , time = hhhhhnnnnnssssss
|
|
$y = ($date & 65024)/512 + 1980;
|
|
$m = ($date & 480)/32;
|
|
$d = ($date & 31);
|
|
$h = ($time & 63488)/2048;
|
|
$i = ($time & 1984)/32;
|
|
$s = ($time & 31) * 2; // seconds have been rounded to an even number in order to save 1 bit
|
|
return $y.'-'.str_pad($m,2,'0',STR_PAD_LEFT).'-'.str_pad($d,2,'0',STR_PAD_LEFT).' '.str_pad($h,2,'0',STR_PAD_LEFT).':'.str_pad($i,2,'0',STR_PAD_LEFT).':'.str_pad($s,2,'0',STR_PAD_LEFT);
|
|
}
|
|
|
|
function _TxtPos($pos) {
|
|
// Return the human readable position in both decimal and hexa
|
|
return $pos." (h:".dechex($pos).")";
|
|
}
|
|
|
|
/**
|
|
* Search the record of end of the Central Directory.
|
|
* Return the position of the record in the file.
|
|
* Return false if the record is not found. The comment cannot exceed 65335 bytes (=FFFF).
|
|
* The method is read backwards a block of 256 bytes and search the key in this block.
|
|
*/
|
|
function _FindCDEnd($cd_info) {
|
|
$nbr = 1;
|
|
$p = false;
|
|
$pos = ftell($this->ArchHnd) - 4 - 256;
|
|
while ( ($p===false) && ($nbr<256) ) {
|
|
if ($pos<=0) {
|
|
$pos = 0;
|
|
$nbr = 256; // in order to make this a last check
|
|
}
|
|
$this->_MoveTo($pos);
|
|
$x = $this->_ReadData(256);
|
|
$p = strpos($x, $cd_info);
|
|
if ($p===false) {
|
|
$nbr++;
|
|
$pos = $pos - 256 - 256;
|
|
} else {
|
|
return $pos + $p;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function _DataOuputAddedFile($Idx, $PosLoc) {
|
|
|
|
$Ref =& $this->AddInfo[$Idx];
|
|
$this->_DataPrepare($Ref); // get data from external file if necessary
|
|
|
|
// Other info
|
|
$now = time();
|
|
$date = $this->_MsDos_Date($now);
|
|
$time = $this->_MsDos_Time($now);
|
|
$len_n = strlen($Ref['name']);
|
|
$purp = 2048 ; // purpose // +8 to indicates that there is an extended local header
|
|
|
|
// Header for file in the data section
|
|
$b = 'PK'.chr(03).chr(04).str_repeat(' ',26); // signature
|
|
$this->_PutDec($b,20,4,2); //vers = 20
|
|
$this->_PutDec($b,$purp,6,2); // purp
|
|
$this->_PutDec($b,$Ref['meth'],8,2); // meth
|
|
$this->_PutDec($b,$time,10,2); // time
|
|
$this->_PutDec($b,$date,12,2); // date
|
|
$this->_PutDec($b,$Ref['crc32'],14,4); // crc32
|
|
$this->_PutDec($b,$Ref['len_c'],18,4); // l_data_c
|
|
$this->_PutDec($b,$Ref['len_u'],22,4); // l_data_u
|
|
$this->_PutDec($b,$len_n,26,2); // l_name
|
|
$this->_PutDec($b,0,28,2); // l_fields
|
|
$b .= $Ref['name']; // name
|
|
$b .= ''; // fields
|
|
|
|
// Output the data
|
|
$this->OutputFromString($b.$Ref['data']);
|
|
$OutputLen = strlen($b) + $Ref['len_c']; // new position of the cursor
|
|
unset($Ref['data']); // save PHP memory
|
|
|
|
// Information for file in the Central Directory
|
|
$b = 'PK'.chr(01).chr(02).str_repeat(' ',42); // signature
|
|
$this->_PutDec($b,20,4,2); // vers_used = 20
|
|
$this->_PutDec($b,20,6,2); // vers_necess = 20
|
|
$this->_PutDec($b,$purp,8,2); // purp
|
|
$this->_PutDec($b,$Ref['meth'],10,2); // meth
|
|
$this->_PutDec($b,$time,12,2); // time
|
|
$this->_PutDec($b,$date,14,2); // date
|
|
$this->_PutDec($b,$Ref['crc32'],16,4); // crc32
|
|
$this->_PutDec($b,$Ref['len_c'],20,4); // l_data_c
|
|
$this->_PutDec($b,$Ref['len_u'],24,4); // l_data_u
|
|
$this->_PutDec($b,$len_n,28,2); // l_name
|
|
$this->_PutDec($b,0,30,2); // l_fields
|
|
$this->_PutDec($b,0,32,2); // l_comm
|
|
$this->_PutDec($b,0,34,2); // disk_num
|
|
$this->_PutDec($b,0,36,2); // int_file_att
|
|
$this->_PutDec($b,0,38,4); // ext_file_att
|
|
$this->_PutDec($b,$PosLoc,42,4); // p_loc
|
|
$b .= $Ref['name']; // v_name
|
|
$b .= ''; // v_fields
|
|
$b .= ''; // v_comm
|
|
|
|
$Ref['bin'] = $b;
|
|
|
|
return $OutputLen;
|
|
|
|
}
|
|
|
|
function _DataCreateNewRef($Data, $DataType, $Compress, $Diff, $NameOrIdx) {
|
|
|
|
if (is_array($Compress)) {
|
|
$result = 2;
|
|
$meth = $Compress['meth'];
|
|
$len_u = $Compress['len_u'];
|
|
$crc32 = $Compress['crc32'];
|
|
$Compress = false;
|
|
} elseif ($Compress and ($this->Meth8Ok)) {
|
|
$result = 1;
|
|
$meth = 8;
|
|
$len_u = false; // means unknown
|
|
$crc32 = false;
|
|
} else {
|
|
$result = ($Compress) ? -1 : 0;
|
|
$meth = 0;
|
|
$len_u = false;
|
|
$crc32 = false;
|
|
$Compress = false;
|
|
}
|
|
|
|
if ($DataType==TBSZIP_STRING) {
|
|
$path = false;
|
|
if ($Compress) {
|
|
// we compress now in order to save PHP memory
|
|
$len_u = strlen($Data);
|
|
$crc32 = crc32($Data);
|
|
$Data = gzdeflate($Data);
|
|
$len_c = strlen($Data);
|
|
} else {
|
|
$len_c = strlen($Data);
|
|
if ($len_u===false) {
|
|
$len_u = $len_c;
|
|
$crc32 = crc32($Data);
|
|
}
|
|
}
|
|
} else {
|
|
$path = $Data;
|
|
$Data = false;
|
|
if (file_exists($path)) {
|
|
$fz = filesize($path);
|
|
if ($len_u===false) $len_u = $fz;
|
|
$len_c = ($Compress) ? false : $fz;
|
|
} else {
|
|
return $this->RaiseError("Cannot add the file '".$path."' because it is not found.");
|
|
}
|
|
}
|
|
|
|
// at this step $Data and $crc32 can be false only in case of external file, and $len_c is false only in case of external file to compress
|
|
return array('data'=>$Data, 'path'=>$path, 'meth'=>$meth, 'len_u'=>$len_u, 'len_c'=>$len_c, 'crc32'=>$crc32, 'diff'=>$Diff, 'res'=>$result);
|
|
|
|
}
|
|
|
|
function _DataPrepare(&$Ref) {
|
|
// returns the real size of data
|
|
if ($Ref['path']!==false) {
|
|
$Ref['data'] = file_get_contents($Ref['path']);
|
|
if ($Ref['crc32']===false) $Ref['crc32'] = crc32($Ref['data']);
|
|
if ($Ref['len_c']===false) {
|
|
// means the data must be compressed
|
|
$Ref['data'] = gzdeflate($Ref['data']);
|
|
$Ref['len_c'] = strlen($Ref['data']);
|
|
}
|
|
}
|
|
}
|
|
|
|
function _EstimateNewArchSize($Optim=true) {
|
|
// Return the size of the new archive, or false if it cannot be calculated (because of external file that must be compressed before to be insered)
|
|
|
|
if ($this->ArchIsNew) {
|
|
$Len = strlen($this->CdInfo['bin']);
|
|
} elseif ($this->ArchIsStream) {
|
|
$x = fstat($this->ArchHnd);
|
|
$Len = $x['size'];
|
|
} else {
|
|
$Len = filesize($this->ArchFile);
|
|
}
|
|
|
|
// files to replace or delete
|
|
foreach ($this->ReplByPos as $i) {
|
|
$Ref =& $this->ReplInfo[$i];
|
|
if ($Ref===false) {
|
|
// file to delete
|
|
$Info =& $this->CdFileLst[$i];
|
|
if (!isset($this->VisFileLst[$i])) {
|
|
if ($Optim) return false; // if $Optimization is set to true, then we d'ont rewind to read information
|
|
$this->_MoveTo($Info['p_loc']);
|
|
$this->_ReadFile($i, false);
|
|
}
|
|
$Vis =& $this->VisFileLst[$i];
|
|
$Len += -strlen($Vis['bin']) -strlen($Info['bin']) - $Info['l_data_c'];
|
|
if (isset($Vis['desc_bin'])) $Len += -strlen($Vis['desc_bin']);
|
|
} elseif ($Ref['len_c']===false) {
|
|
return false; // information not yet known
|
|
} else {
|
|
// file to replace
|
|
$Len += $Ref['len_c'] + $Ref['diff'];
|
|
}
|
|
}
|
|
|
|
// files to add
|
|
$i_lst = array_keys($this->AddInfo);
|
|
foreach ($i_lst as $i) {
|
|
$Ref =& $this->AddInfo[$i];
|
|
if ($Ref['len_c']===false) {
|
|
return false; // information not yet known
|
|
} else {
|
|
$Len += $Ref['len_c'] + $Ref['diff'];
|
|
}
|
|
}
|
|
|
|
return $Len;
|
|
|
|
}
|
|
|
|
} |