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ZipStream

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This commit is contained in:
Roman Hergenreder
2021-01-13 01:36:04 +01:00
parent 8da94bafdf
commit e19b4d1a46
15 changed files with 614 additions and 43 deletions
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62
core/External/ZipStream/BufferWriter.php vendored Normal file
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<?php
/**
* Copyright (c) Borago 2019
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
**/
namespace External\ZipStream {
class BufferWriter implements Writer {
private $stream = '';
private $offset = 0;
private $callback = null;
public function __construct() {
}
public function registerCallback($callback) {
$this->callback = $callback;
}
public function write($data) {
$this->offset += strlen($data);
$this->stream .= $data;
if ($this->callback !== null) {
call_user_func($this->callback, $this);
}
return strlen($data);
}
public function read() {
$data = $this->stream;
$this->stream = '';
return $data;
}
public function offset() {
return $this->offset;
}
public function close() {
if ($this->callback !== null) {
call_user_func($this->callback, $this);
}
}
}
}

207
core/External/ZipStream/File.php vendored Normal file
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<?php
/**
* Copyright (c) Borago 2019
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
**/
namespace External\ZipStream {
class File {
private $name;
private $content = '';
private $fileHandle = false;
private $lastModificationTimestamp;
private $crc32 = null;
private $fileSize = 0;
private $compressedSize = 0;
private $offset = 0;
private $bitField = 0;
private $useCompression = true;
private $deflateState = null;
//check for duplications //currently not used
private $sha256;
public const BIT_NO_SIZE_IN_HEADER = 0b0000000000001000;
public const BIT_UTF8_NAMES = 0b0000100000000000;
public function __construct($name) {
$this->name = $name;
$this->lastModificationTimestamp = time();
$this->crc32 = hash('crc32b', '', true);
$this->compressedSize = 0;
$this->bitField = 0;
$this->bitField |= self::BIT_NO_SIZE_IN_HEADER;
$this->bitField |= self::BIT_UTF8_NAMES;
$this->deflateState = deflate_init(ZLIB_ENCODING_RAW, ['level' => 9]);
}
public function setContent($content) {
$this->crc32 = hash('crc32b', $content, true);
$this->sha256 = hash('sha256', $content);
$this->content = $content;
$this->fileSize = strlen($content);
$this->fileHandle = false;
}
public function loadFromFile($filename) {
$this->crc32 = hash_file('crc32b', $filename, true);
$this->sha256 = hash_file('sha256', $filename);
$this->fileSize = filesize($filename);
$this->fileHandle = fopen($filename, 'rb');
}
public function name() {
return $this->name;
}
public function sha256() {
return $this->sha256;
}
private function unixTimeToDosTime($timestamp) {
$hour = intval(date('H', $timestamp));
$min = intval(date('i', $timestamp));
$sec = intval(date('s', $timestamp));
return ($hour << 11) |
($min << 5) |
($sec >> 1);
}
private function unixTimeToDosDate($timestamp) {
$year = intval(date('Y', $timestamp));
$month = intval(date('m', $timestamp));
$day = intval(date('d', $timestamp));
return (($year - 1980) << 9) |
($month << 5) |
($day);
}
public function readLocalFileHeader() {
if (!$this->useCompression) {
$this->compressedSize = $this->fileSize;
}
$header = "";
$header .= "\x50\x4b\x03\x04";
$header .= "\x14\x00"; //version 2.0 and MS-DOS compatible
$header .= pack("v", $this->bitField); //general purpose bit flag
if ($this->useCompression) {
$header .= "\x08\x00"; //compression Method - deflate
} else {
$header .= "\x00\x00"; //compression Method - no
}
$header .= pack("v", $this->unixTimeToDosTime($this->lastModificationTimestamp)); //dos time
$header .= pack("v", $this->unixTimeToDosDate($this->lastModificationTimestamp)); //dos date
if ($this->bitField & self::BIT_NO_SIZE_IN_HEADER) {
$header .= pack("V", 0); //crc32
$header .= pack("V", 0); //compressed Size
$header .= pack("V", 0); //uncompressed Size
} else {
$header .= strrev($this->crc32);
$header .= pack("V", $this->compressedSize); //compressed Size
$header .= pack("V", $this->fileSize); //uncompressed Size
}
$header .= pack("v", strlen($this->name)); //filename
$header .= "\x00\x00"; //extra field length
$header .= $this->name;
return $header;
}
public function readDataDescriptor() {
$data = "";
$data .= "\x50\x4b\x07\x08";
$data .= strrev($this->crc32);
$data .= pack("V", $this->compressedSize); //compressed Size
$data .= pack("V", $this->fileSize); //uncompressed Size
return $data;
}
public function readFileDataImp() {
$ret = null;
if ($this->fileHandle !== false) {
$block = fread($this->fileHandle, 65536);
if (!empty($block)) {
$ret = $block;
}
} else {
$ret = $this->content;
$this->content = null;
}
return $ret;
}
public function readFileData() {
$ret = null;
if ($this->useCompression) {
$block = $this->readFileDataImp();
if ($this->deflateState !== null) {
if ($block !== null) {
$ret = deflate_add($this->deflateState, $block, ZLIB_NO_FLUSH);
} else {
$ret = deflate_add($this->deflateState, '', ZLIB_FINISH);
$this->deflateState = null;
}
}
if ($ret !== null) {
$this->compressedSize += strlen($ret);
}
} else {
$ret = $this->readFileDataImp();
}
return $ret;
}
public function setOffset($offset) {
$this->offset = $offset;
}
public function readCentralDirectoryHeader() {
$header = "";
$header .= "\x50\x4b\x01\x02";
$header .= "\x14\x00"; //version 2.0 and MS-DOS compatible
$header .= "\x14\x00"; //version 2.0 and MS-DOS compatible
$header .= pack("v", $this->bitField); //general purpose bit flag
$header .= "\x00\x00"; //compression Method - no
$header .= pack("v", $this->unixTimeToDosTime($this->lastModificationTimestamp)); //dos time
$header .= pack("v", $this->unixTimeToDosDate($this->lastModificationTimestamp)); //dos date
$header .= strrev($this->crc32);
$header .= pack("V", $this->compressedSize); //compressed Size
$header .= pack("V", $this->fileSize); //uncompressed Size
$header .= pack("v", strlen($this->name)); //filename
$header .= "\x00\x00"; //extra field length
$header .= "\x00\x00"; //comment length
$header .= "\x00\x00"; //disk num start
$header .= "\x00\x00"; //int file attr
$header .= "\x00\x00\x00\x00"; //ext file attr
$header .= pack("V", $this->offset); //relative offset
$header .= $this->name;
return $header;
}
public function closeHandle() {
if ($this->fileHandle) {
fclose($this->fileHandle);
}
}
}
}

63
core/External/ZipStream/FileWriter.php vendored Normal file
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<?php
/**
* Copyright (c) Borago 2019
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
**/
namespace External\ZipStream {
class FileWriter implements Writer {
private $offset = 0;
private $fileHandle = false;
public function __construct($filename) {
if (!empty($filename)) {
$this->open($filename);
}
}
public function __destruct() {
$this->close();
}
public function open($filename) {
$this->close();
$this->fileHandle = fopen($filename, 'wb');
}
public function write($data) {
$this->offset += strlen($data);
if ($this->fileHandle === false) {
throw new \Exception('No file opened.');
} else {
return fwrite($this->fileHandle, $data);
}
}
public function offset() {
return $this->offset;
}
public function close() {
if ($this->fileHandle !== false) {
fclose($this->fileHandle);
}
$this->fileHandle = false;
}
}
}

29
core/External/ZipStream/Writer.php vendored Normal file
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<?php
/**
* Copyright (c) Borago 2019
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
**/
namespace External\ZipStream {
interface Writer {
public function write($data);
public function close();
public function offset();
}
}

72
core/External/ZipStream/ZipStream.php vendored Normal file
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<?php
/**
* Copyright (c) Borago 2019
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
**/
namespace External\ZipStream {
class ZipStream {
private $writer = null;
private $files = [];
public function __construct($writer) {
$this->writer = $writer;
}
public function saveFile($file) {
$isSymlink = false; //currently not used
foreach ($this->files as $f) {
if ($f->name() == $file->name()) {
return false;
}
if ($f->sha256() == $file->sha256()) {
$isSymlink = true;
}
}
$file->setOffset($this->writer->offset());
$this->writer->write($file->readLocalFileHeader());
while (($buffer = $file->readFileData()) !== null) {
$this->writer->write($buffer);
}
$this->writer->write($file->readDataDescriptor());
$this->files[] = $file;
$file->closeHandle();
return true;
}
public function close() {
$size = 0;
$offset = $this->writer->offset();
foreach ($this->files as $file) {
$size += $this->writer->write($file->readCentralDirectoryHeader());
}
$data = "";
$data .= "\x50\x4b\x05\x06";
$data .= "\x00\x00"; //number of disks
$data .= "\x00\x00"; //number of the disk with the start of the central directory
$data .= pack("v", count($this->files)); //total number of entries in the central directory on this disk
$data .= pack("v", count($this->files)); //total number of entries in the central directory
$data .= pack("V", $size); //size of the central directory
$data .= pack("V", $offset); //offset of start of central directory with respect to the starting disk number
$data .= "\x0\x0"; //comment length
$this->writer->write($data);
}
}
}