108 lines
4.3 KiB
PHP
108 lines
4.3 KiB
PHP
<?php
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/**
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* Copyright (c) Borago 2019
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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**/
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namespace Core\External\ZipStream {
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class ZipStream {
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private $writer = null;
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private array $files = [];
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private bool $zip64;
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public function __construct($writer, $zip64 = false) {
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$this->writer = $writer;
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$this->zip64 = $zip64;
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}
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public function saveFile($file) {
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$isSymlink = false; //currently not used
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foreach ($this->files as $f) {
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if ($f->name() == $file->name()) {
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return false;
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}
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if ($f->sha256() == $file->sha256()) {
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$isSymlink = true;
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}
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}
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$file->setOffset($this->writer->offset());
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$this->writer->write($file->readLocalFileHeader($this->zip64));
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if ($file instanceof FileStream) {
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$file->getStream()->setOutput(function ($chunk) use ($file) {
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$this->writer->write($file->processChunk($chunk));
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});
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$file->getStream()->start();
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$this->writer->write($file->finalize());
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} else {
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while (($buffer = $file->readFileData()) !== null) {
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$this->writer->write($buffer);
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}
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}
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$this->writer->write($file->readDataDescriptor($this->zip64));
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$this->files[] = $file;
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$file->closeHandle();
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return true;
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}
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// Write end of central directory record
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public function close() {
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$size = 0;
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$offset = $this->writer->offset();
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foreach ($this->files as $file) {
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$size += $this->writer->write($file->readCentralDirectoryHeader($this->zip64));
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}
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$data = "";
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if ($this->zip64) {
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// Size = SizeOfFixedFields + SizeOfVariableData - 12.
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$centralDirectorySize = 2*2 + 2*4 + 4*8;
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$data .= "\x50\x4b\x06\x06";
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$data .= pack("P", $centralDirectorySize);
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$data .= "\x2d\x00"; // version 2.0 and MS-DOS compatible
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$data .= "\x2d\x00"; // version 2.0 and MS-DOS compatible
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$data .= "\x00\x00\x00\x00"; //number of disks
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$data .= "\x00\x00\x00\x00"; //number of the disk with the start of the central directory
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$data .= pack("P", count($this->files)); //total number of entries in the central directory on this disk
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$data .= pack("P", count($this->files)); //total number of entries in the central directory
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$data .= pack("P", $size); // size of the central directory
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$data .= pack("P", $offset); //offset of start of central directory with respect to the starting disk number
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// end of central directory locator
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$data .= "\x50\x4b\x06\x07";
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$data .= "\x00\x00\x00\x00";
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$data .= pack("P", $this->writer->offset());
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$data .= pack('V', 1); //number of disks
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}
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$data .= "\x50\x4b\x05\x06";
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$data .= "\x00\x00"; //number of disks
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$data .= "\x00\x00"; //number of the disk with the start of the central directory
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$data .= $this->zip64 ? "\xFF\xFF" : pack("v", count($this->files)); //total number of entries in the central directory on this disk
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$data .= $this->zip64 ? "\xFF\xFF" : pack("v", count($this->files)); //total number of entries in the central directory
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$data .= $this->zip64 ? "\xFF\xFF\xFF\xFF" : pack("V", $size); // size of the central directory
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$data .= $this->zip64 ? "\xFF\xFF\xFF\xFF" : pack("V", $offset); //offset of start of central directory with respect to the starting disk number
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$data .= "\x00\x00"; //comment length
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$this->writer->write($data);
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}
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}
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} |