572 lines
19 KiB
PHP
Executable File
572 lines
19 KiB
PHP
Executable File
<?php
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/**
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* Class to create zip file, aimed at large files, or even large target zip file.
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* This class will stream the generated zip file directly to the HTTP client as the content is added.
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*
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* If you need the Zip file data on the server, for storage in a database of the server file system, look at
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* the Zip class at http://www.phpclasses.org/browse/package/6110.html
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*
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* License: GNU LGPL, Attribution required for commercial implementations, requested for everything else.
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*
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* Inspired on CreateZipFile by Rochak Chauhan www.rochakchauhan.com (http://www.phpclasses.org/browse/package/2322.html)
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* and
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* http://www.pkware.com/documents/casestudies/APPNOTE.TXT Zip file specification.
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*
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* @author A. Grandt <php@grandt.com>
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* @copyright 2009-2013 A. Grandt
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* @license GNU LGPL, Attribution required for commercial implementations, requested for everything else.
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* @link http://www.phpclasses.org/package/6116
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* @link https://github.com/Grandt/PHPZip
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* @version 1.37
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*/
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class ZipStream {
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const VERSION = 1.37;
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const ZIP_LOCAL_FILE_HEADER = "\x50\x4b\x03\x04"; // Local file header signature
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const ZIP_CENTRAL_FILE_HEADER = "\x50\x4b\x01\x02"; // Central file header signature
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const ZIP_END_OF_CENTRAL_DIRECTORY = "\x50\x4b\x05\x06\x00\x00\x00\x00"; //end of Central directory record
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const EXT_FILE_ATTR_DIR = "\x10\x00\xFF\x41";
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const EXT_FILE_ATTR_FILE = "\x00\x00\xFF\x81";
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const ATTR_VERSION_TO_EXTRACT = "\x14\x00"; // Version needed to extract
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const ATTR_MADE_BY_VERSION = "\x1E\x03"; // Made By Version
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private $zipMemoryThreshold = 1048576; // Autocreate tempfile if the zip data exceeds 1048576 bytes (1 MB)
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private $zipComment = null;
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private $cdRec = array(); // central directory
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private $offset = 0;
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private $isFinalized = FALSE;
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private $addExtraField = TRUE;
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private $streamChunkSize = 16384; // 65536;
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private $streamFilePath = null;
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private $streamTimeStamp = null;
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private $streamComment = null;
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private $streamFile = null;
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private $streamData = null;
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private $streamFileLength = 0;
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/**
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* Constructor.
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*
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* @param String $archiveName Name to send to the HTTP client.
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* @param String $contentType Content mime type. Optional, defaults to "application/zip".
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*/
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function __construct($archiveName = "", $contentType = "application/zip") {
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if (!function_exists('sys_get_temp_dir')) {
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die ("ERROR: ZipStream " . self::VERSION . " requires PHP version 5.2.1 or above.");
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}
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$headerFile = null;
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$headerLine = null;
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if (!headers_sent($headerFile, $headerLine) or die("<p><strong>Error:</strong> Unable to send file $archiveName. HTML Headers have already been sent from <strong>$headerFile</strong> in line <strong>$headerLine</strong></p>")) {
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if ((ob_get_contents() === FALSE || ob_get_contents() == '') or die("\n<p><strong>Error:</strong> Unable to send file <strong>$archiveName.epub</strong>. Output buffer contains the following text (typically warnings or errors):<br>" . ob_get_contents() . "</p>")) {
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if (ini_get('zlib.output_compression')) {
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ini_set('zlib.output_compression', 'Off');
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}
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header('Pragma: public');
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header("Last-Modified: " . gmdate("D, d M Y H:i:s T"));
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header("Expires: 0");
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header("Accept-Ranges: bytes");
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//header("Connection: Keep-Alive");
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header("Content-Type: " . $contentType);
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header('Content-Disposition: attachment; filename="' . $archiveName . '";');
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header("Content-Transfer-Encoding: binary");
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flush();
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}
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}
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}
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function __destruct() {
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$this->isFinalized = TRUE;
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$this->cdRec = null;
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exit;
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}
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/**
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* Extra fields on the Zip directory records are Unix time codes needed for compatibility on the default Mac zip archive tool.
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* These are enabled as default, as they do no harm elsewhere and only add 26 bytes per file added.
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*
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* @param bool $setExtraField TRUE (default) will enable adding of extra fields, anything else will disable it.
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*/
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function setExtraField($setExtraField = TRUE) {
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$this->addExtraField = ($setExtraField === TRUE);
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}
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/**
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* Set Zip archive comment.
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*
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* @param string $newComment New comment. null to clear.
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* @return bool $success
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*/
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public function setComment($newComment = null) {
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if ($this->isFinalized) {
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return FALSE;
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}
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$this->zipComment = $newComment;
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return TRUE;
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}
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/**
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* Add an empty directory entry to the zip archive.
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* Basically this is only used if an empty directory is added.
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*
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* @param string $directoryPath Directory Path and name to be added to the archive.
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* @param int $timestamp (Optional) Timestamp for the added directory, if omitted or set to 0, the current time will be used.
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* @param string $fileComment (Optional) Comment to be added to the archive for this directory. To use fileComment, timestamp must be given.
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* @return bool $success
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*/
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public function addDirectory($directoryPath, $timestamp = 0, $fileComment = null) {
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if ($this->isFinalized) {
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return FALSE;
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}
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$directoryPath = str_replace("\\", "/", $directoryPath);
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$directoryPath = rtrim($directoryPath, "/");
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if (strlen($directoryPath) > 0) {
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$this->buildZipEntry($directoryPath.'/', $fileComment, "\x00\x00", "\x00\x00", $timestamp, "\x00\x00\x00\x00", 0, 0, self::EXT_FILE_ATTR_DIR);
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return TRUE;
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}
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return FALSE;
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}
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/**
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* Add a file to the archive at the specified location and file name.
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*
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* @param string $data File data.
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* @param string $filePath Filepath and name to be used in the archive.
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* @param int $timestamp (Optional) Timestamp for the added file, if omitted or set to 0, the current time will be used.
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* @param string $fileComment (Optional) Comment to be added to the archive for this file. To use fileComment, timestamp must be given.
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* @return bool $success
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*/
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public function addFile($data, $filePath, $timestamp = 0, $fileComment = null) {
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if ($this->isFinalized) {
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return FALSE;
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}
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if (is_resource($data) && get_resource_type($data) == "stream") {
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$this->addLargeFile($data, $filePath, $timestamp, $fileComment);
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return FALSE;
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}
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$gzType = "\x08\x00"; // Compression type 8 = deflate
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$gpFlags = "\x00\x00"; // General Purpose bit flags for compression type 8 it is: 0=Normal, 1=Maximum, 2=Fast, 3=super fast compression.
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$dataLength = strlen($data);
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$fileCRC32 = pack("V", crc32($data));
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$gzData = gzcompress($data);
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$gzData = substr(substr($gzData, 0, strlen($gzData) - 4), 2); // gzcompress adds a 2 byte header and 4 byte CRC we can't use.
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// The 2 byte header does contain useful data, though in this case the 2 parameters we'd be interrested in will always be 8 for compression type, and 2 for General purpose flag.
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$gzLength = strlen($gzData);
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if ($gzLength >= $dataLength) {
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$gzLength = $dataLength;
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$gzData = $data;
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$gzType = "\x00\x00"; // Compression type 0 = stored
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$gpFlags = "\x00\x00"; // Compression type 0 = stored
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}
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$this->buildZipEntry($filePath, $fileComment, $gpFlags, $gzType, $timestamp, $fileCRC32, $gzLength, $dataLength, self::EXT_FILE_ATTR_FILE);
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print ($gzData);
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return TRUE;
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}
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/**
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* Add the content to a directory.
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*
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* @author Adam Schmalhofer <Adam.Schmalhofer@gmx.de>
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* @author A. Grandt
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*
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* @param String $realPath Path on the file system.
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* @param String $zipPath Filepath and name to be used in the archive.
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* @param bool $recursive Add content recursively, default is TRUE.
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* @param bool $followSymlinks Follow and add symbolic links, if they are accessible, default is TRUE.
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* @param array &$addedFiles Reference to the added files, this is used to prevent duplicates, efault is an empty array.
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* If you start the function by parsing an array, the array will be populated with the realPath
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* and zipPath kay/value pairs added to the archive by the function.
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*/
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public function addDirectoryContent($realPath, $zipPath, $recursive = TRUE, $followSymlinks = TRUE, &$addedFiles = array()) {
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if (file_exists($realPath) && !isset($addedFiles[realpath($realPath)])) {
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if (is_dir($realPath)) {
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$this->addDirectory($zipPath);
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}
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$addedFiles[realpath($realPath)] = $zipPath;
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$iter = new DirectoryIterator($realPath);
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foreach ($iter as $file) {
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if ($file->isDot()) {
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continue;
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}
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$newRealPath = $file->getPathname();
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$newZipPath = self::pathJoin($zipPath, $file->getFilename());
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if (file_exists($newRealPath) && ($followSymlinks === TRUE || !is_link($newRealPath))) {
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if ($file->isFile()) {
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$addedFiles[realpath($newRealPath)] = $newZipPath;
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$this->addLargeFile($newRealPath, $newZipPath);
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} else if ($recursive === TRUE) {
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$this->addDirectoryContent($newRealPath, $newZipPath, $recursive);
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} else {
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$this->addDirectory($zipPath);
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}
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}
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}
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}
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}
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/**
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* Add a file to the archive at the specified location and file name.
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*
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* @param string $dataFile File name/path.
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* @param string $filePath Filepath and name to be used in the archive.
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* @param int $timestamp (Optional) Timestamp for the added file, if omitted or set to 0, the current time will be used.
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* @param string $fileComment (Optional) Comment to be added to the archive for this file. To use fileComment, timestamp must be given.
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* @return bool $success
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*/
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public function addLargeFile($dataFile, $filePath, $timestamp = 0, $fileComment = null) {
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if ($this->isFinalized) {
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return FALSE;
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}
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if (is_string($dataFile) && is_file($dataFile)) {
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$this->processFile($dataFile, $filePath, $timestamp, $fileComment);
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} else if (is_resource($dataFile) && get_resource_type($dataFile) == "stream") {
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$fh = $dataFile;
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$this->openStream($filePath, $timestamp, $fileComment);
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while (!feof($fh)) {
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$this->addStreamData(fread($fh, $this->streamChunkSize));
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}
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$this->closeStream($this->addExtraField);
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}
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return TRUE;
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}
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/**
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* Create a stream to be used for large entries.
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*
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* @param string $filePath Filepath and name to be used in the archive.
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* @param int $timestamp (Optional) Timestamp for the added file, if omitted or set to 0, the current time will be used.
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* @param string $fileComment (Optional) Comment to be added to the archive for this file. To use fileComment, timestamp must be given.
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* @return bool $success
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*/
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public function openStream($filePath, $timestamp = 0, $fileComment = null) {
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if (!function_exists('sys_get_temp_dir')) {
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die ("ERROR: Zip " . self::VERSION . " requires PHP version 5.2.1 or above if large files are used.");
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}
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if ($this->isFinalized) {
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return FALSE;
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}
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if (strlen($this->streamFilePath) > 0) {
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closeStream();
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}
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$this->streamFile = tempnam(sys_get_temp_dir(), 'ZipStream');
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$this->streamData = fopen($this->streamFile, "wb");
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$this->streamFilePath = $filePath;
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$this->streamTimestamp = $timestamp;
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$this->streamFileComment = $fileComment;
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$this->streamFileLength = 0;
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return TRUE;
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}
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/**
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* Add data to the open stream.
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*
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* @param String $data
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* @return $length bytes added or FALSE if the archive is finalized or there are no open stream.
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*/
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public function addStreamData($data) {
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if ($this->isFinalized || strlen($this->streamFilePath) == 0) {
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return FALSE;
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}
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$length = fwrite($this->streamData, $data, strlen($data));
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if ($length != strlen($data)) {
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die ("<p>Length mismatch</p>\n");
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}
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$this->streamFileLength += $length;
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return $length;
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}
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/**
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* Close the current stream.
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*
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* @return bool $success
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*/
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public function closeStream() {
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if ($this->isFinalized || strlen($this->streamFilePath) == 0) {
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return FALSE;
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}
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fflush($this->streamData);
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fclose($this->streamData);
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$this->processFile($this->streamFile, $this->streamFilePath, $this->streamTimestamp, $this->streamFileComment);
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$this->streamData = null;
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$this->streamFilePath = null;
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$this->streamTimestamp = null;
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$this->streamFileComment = null;
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$this->streamFileLength = 0;
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// Windows is a little slow at times, so a millisecond later, we can unlink this.
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unlink($this->streamFile);
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$this->streamFile = null;
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return TRUE;
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}
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private function processFile($dataFile, $filePath, $timestamp = 0, $fileComment = null) {
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if ($this->isFinalized) {
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return FALSE;
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}
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$tempzip = tempnam(sys_get_temp_dir(), 'ZipStream');
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$zip = new ZipArchive;
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if ($zip->open($tempzip) === TRUE) {
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$zip->addFile($dataFile, 'file');
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$zip->close();
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}
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$file_handle = fopen($tempzip, "rb");
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$stats = fstat($file_handle);
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$eof = $stats['size']-72;
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fseek($file_handle, 6);
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$gpFlags = fread($file_handle, 2);
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$gzType = fread($file_handle, 2);
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fread($file_handle, 4);
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$fileCRC32 = fread($file_handle, 4);
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$v = unpack("Vval", fread($file_handle, 4));
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$gzLength = $v['val'];
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$v = unpack("Vval", fread($file_handle, 4));
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$dataLength = $v['val'];
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$this->buildZipEntry($filePath, $fileComment, $gpFlags, $gzType, $timestamp, $fileCRC32, $gzLength, $dataLength, self::EXT_FILE_ATTR_FILE);
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fseek($file_handle, 34);
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$pos = 34;
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while (!feof($file_handle) && $pos < $eof) {
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$datalen = $this->streamChunkSize;
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if ($pos + $this->streamChunkSize > $eof) {
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$datalen = $eof-$pos;
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}
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echo fread($file_handle, $datalen);
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$pos += $datalen;
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flush();
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}
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fclose($file_handle);
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unlink($tempzip);
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}
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/**
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* Close the archive.
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* A closed archive can no longer have new files added to it.
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* @return bool $success
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*/
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public function finalize() {
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if (!$this->isFinalized) {
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if (strlen($this->streamFilePath) > 0) {
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$this->closeStream();
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}
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$cdRecSize = pack("v", sizeof($this->cdRec));
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$cd = implode("", $this->cdRec);
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print($cd);
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print(self::ZIP_END_OF_CENTRAL_DIRECTORY);
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print($cdRecSize.$cdRecSize);
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print(pack("VV", strlen($cd), $this->offset));
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if (!empty($this->zipComment)) {
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print(pack("v", strlen($this->zipComment)));
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print($this->zipComment);
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} else {
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print("\x00\x00");
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}
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flush();
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$this->isFinalized = TRUE;
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$cd = null;
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$this->cdRec = null;
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return TRUE;
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}
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return FALSE;
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}
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/**
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* Calculate the 2 byte dostime used in the zip entries.
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*
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* @param int $timestamp
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* @return 2-byte encoded DOS Date
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*/
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private function getDosTime($timestamp = 0) {
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$timestamp = (int)$timestamp;
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$oldTZ = @date_default_timezone_get();
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date_default_timezone_set('UTC');
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$date = ($timestamp == 0 ? getdate() : getdate($timestamp));
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date_default_timezone_set($oldTZ);
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if ($date["year"] >= 1980) {
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return pack("V", (($date["mday"] + ($date["mon"] << 5) + (($date["year"]-1980) << 9)) << 16) |
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(($date["seconds"] >> 1) + ($date["minutes"] << 5) + ($date["hours"] << 11)));
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}
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return "\x00\x00\x00\x00";
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}
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/**
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* Build the Zip file structures
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*
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* @param String $filePath
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* @param String $fileComment
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* @param String $gpFlags
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* @param String $gzType
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* @param int $timestamp
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* @param string $fileCRC32
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* @param int $gzLength
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* @param int $dataLength
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* @param integer $extFileAttr Use self::EXT_FILE_ATTR_FILE for files, self::EXT_FILE_ATTR_DIR for Directories.
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*/
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private function buildZipEntry($filePath, $fileComment, $gpFlags, $gzType, $timestamp, $fileCRC32, $gzLength, $dataLength, $extFileAttr) {
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$filePath = str_replace("\\", "/", $filePath);
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$fileCommentLength = (empty($fileComment) ? 0 : strlen($fileComment));
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$timestamp = (int)$timestamp;
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$timestamp = ($timestamp == 0 ? time() : $timestamp);
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$dosTime = $this->getDosTime($timestamp);
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$tsPack = pack("V", $timestamp);
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$ux = "\x75\x78\x0B\x00\x01\x04\xE8\x03\x00\x00\x04\x00\x00\x00\x00";
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if (!isset($gpFlags) || strlen($gpFlags) != 2) {
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$gpFlags = "\x00\x00";
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}
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$isFileUTF8 = mb_check_encoding($filePath, "UTF-8") && !mb_check_encoding($filePath, "ASCII");
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$isCommentUTF8 = !empty($fileComment) && mb_check_encoding($fileComment, "UTF-8") && !mb_check_encoding($fileComment, "ASCII");
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if ($isFileUTF8 || $isCommentUTF8) {
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$flag = 0;
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$gpFlagsV = unpack("vflags", $gpFlags);
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if (isset($gpFlagsV['flags'])) {
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$flag = $gpFlagsV['flags'];
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}
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$gpFlags = pack("v", $flag | (1 << 11));
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}
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$header = $gpFlags . $gzType . $dosTime. $fileCRC32
|
|
. pack("VVv", $gzLength, $dataLength, strlen($filePath)); // File name length
|
|
|
|
$zipEntry = self::ZIP_LOCAL_FILE_HEADER;
|
|
$zipEntry .= self::ATTR_VERSION_TO_EXTRACT;
|
|
$zipEntry .= $header;
|
|
$zipEntry .= $this->addExtraField ? "\x1C\x00" : "\x00\x00"; // Extra field length
|
|
$zipEntry .= $filePath; // FileName
|
|
// Extra fields
|
|
if ($this->addExtraField) {
|
|
$zipEntry .= "\x55\x54\x09\x00\x03" . $tsPack . $tsPack . $ux;
|
|
}
|
|
|
|
print($zipEntry);
|
|
|
|
$cdEntry = self::ZIP_CENTRAL_FILE_HEADER;
|
|
$cdEntry .= self::ATTR_MADE_BY_VERSION;
|
|
$cdEntry .= ($dataLength === 0 ? "\x0A\x00" : self::ATTR_VERSION_TO_EXTRACT);
|
|
$cdEntry .= $header;
|
|
$cdEntry .= $this->addExtraField ? "\x18\x00" : "\x00\x00"; // Extra field length
|
|
$cdEntry .= pack("v", $fileCommentLength); // File comment length
|
|
$cdEntry .= "\x00\x00"; // Disk number start
|
|
$cdEntry .= "\x00\x00"; // internal file attributes
|
|
$cdEntry .= $extFileAttr; // External file attributes
|
|
$cdEntry .= pack("V", $this->offset); // Relative offset of local header
|
|
$cdEntry .= $filePath; // FileName
|
|
// Extra fields
|
|
if ($this->addExtraField) {
|
|
$cdEntry .= "\x55\x54\x05\x00\x03" . $tsPack . $ux;
|
|
}
|
|
|
|
if (!empty($fileComment)) {
|
|
$cdEntry .= $fileComment; // Comment
|
|
}
|
|
|
|
$this->cdRec[] = $cdEntry;
|
|
$this->offset += strlen($zipEntry) + $gzLength;
|
|
}
|
|
|
|
/**
|
|
* Join $file to $dir path, and clean up any excess slashes.
|
|
*
|
|
* @param String $dir
|
|
* @param String $file
|
|
*/
|
|
public static function pathJoin($dir, $file) {
|
|
if (empty($dir) || empty($file)) {
|
|
return self::getRelativePath($dir . $file);
|
|
}
|
|
return self::getRelativePath($dir . '/' . $file);
|
|
}
|
|
|
|
/**
|
|
* Clean up a path, removing any unnecessary elements such as /./, // or redundant ../ segments.
|
|
* If the path starts with a "/", it is deemed an absolute path and any /../ in the beginning is stripped off.
|
|
* The returned path will not end in a "/".
|
|
*
|
|
* @param String $path The path to clean up
|
|
* @return String the clean path
|
|
*/
|
|
public static function getRelativePath($path) {
|
|
$path = preg_replace("#/+\.?/+#", "/", str_replace("\\", "/", $path));
|
|
$dirs = explode("/", rtrim(preg_replace('#^(?:\./)+#', '', $path), '/'));
|
|
|
|
$offset = 0;
|
|
$sub = 0;
|
|
$subOffset = 0;
|
|
$root = "";
|
|
|
|
if (empty($dirs[0])) {
|
|
$root = "/";
|
|
$dirs = array_splice($dirs, 1);
|
|
} else if (preg_match("#[A-Za-z]:#", $dirs[0])) {
|
|
$root = strtoupper($dirs[0]) . "/";
|
|
$dirs = array_splice($dirs, 1);
|
|
}
|
|
|
|
$newDirs = array();
|
|
foreach ($dirs as $dir) {
|
|
if ($dir !== "..") {
|
|
$subOffset--;
|
|
$newDirs[++$offset] = $dir;
|
|
} else {
|
|
$subOffset++;
|
|
if (--$offset < 0) {
|
|
$offset = 0;
|
|
if ($subOffset > $sub) {
|
|
$sub++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (empty($root)) {
|
|
$root = str_repeat("../", $sub);
|
|
}
|
|
return $root . implode("/", array_slice($newDirs, 0, $offset));
|
|
}
|
|
} |