Archive on the fly, Version 1.2a (alt)
Hinweis: dies ist nicht die neueste Version!
Datei: aotf/vs.zip.php
<?php /* Flocke's "Archive on the Fly" Set of PHP classes to create archives on the fly plus a class to extract the contents of ZIP files. See the included file README.txt for information on how to use it. This file: vs.zip.php (class to create zip archives) Version 1.2 - always find the latest version at http://flocke.vssd.de/prog/code/php/aotf/ Copyright (C) 2005 Volker Siebert <flocke@vssd.de> All rights reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ require_once("vs.arc.php"); class vsZipFile extends vsArcFile { var $directory; // Central directory // Reset to create a new archive function clear() { $this->directory = ''; $this->_clear('application/x-zip', '.zip'); } // Add a new entry to the file // NAME is the stored file name // DATE is the modification date/time // FTYPE is one of the VSARC_FTYPE_ constants // DATA is the uncompressed data for files and empty otherwise // LINKTARGET is the target of the symbolic link function _add_entry($name, $date, $ftype, &$data, $linktarget = '') { // General variables $crc32 = crc32($data); // CRC-32 checksum $osize = strlen($data); // original data size $csize = $osize; // compressed data size $nmlen = strlen($name); // length of the filename $gpbf = 0; // General purpose bit flag $meth = 0; // Compression method (0=stored) $extra = ''; $exlen = 0; // Check if we can compress the file if ($ftype != VSARC_FTYPE_FILE || $osize <= 3) $level = 0; else $level = $this->_fix_level(); if ($level > 0) { $comp = gzdeflate($data, $level); if (strlen($comp) >= $osize) { $level = 0; unset($comp); } else { $data = &$comp; $csize = strlen($comp); $meth = 8; // Compression method (8=deflated) if ($level <= 2) $gpbf |= 2; elseif ($level >= 8) $gpbf |= 4; } } // DOS date & time $date = getdate($date); if ($date['year'] < 1980) $dosdate = (1 << 21) | (1 << 16); else $dosdate = (($date['year'] - 1980) << 25) | ( $date['mon'] << 21) | ( $date['mday'] << 16) | ( $date['hours'] << 11) | ( $date['minutes'] << 5) | ( $date['seconds'] >> 1); // DOS attribute if ($ftype == VSARC_FTYPE_DIR) $dosattr = 0x10; // directory else $dosattr = 0x20; // archive if ($ftype == VSARC_FTYPE_SYMLINK && !empty($linktarget)) { $extra = pack('vvVVvv', 0x000d, 12 + strlen($linktarget), $date, $date, 0, 0) . $linktarget; $exlen = strlen($extra); } // Local file header $lfh = pack('VvvvVVVVvv', 0x04034b50, // local file header signature 20, // version needed to extract (2.0) $gpbf, // general purpose bit flag $meth, // compression method $dosdate, // last mod file time + date $crc32, // crc-32 $csize, // compressed size $osize, // uncompressed size $nmlen, // file name length $exlen); // extra field length // Central directory file header $dfh = pack('VvvvvVVVVvvvvvVV', 0x02014b50, // central file header signature 20, // version made by (2.0) 20, // version needed to extract (2.0) $gpbf, // general purpose bit flag $meth, // compression method $dosdate, // last mod file time + date $crc32, // crc-32 $csize, // compressed size $osize, // uncompressed size $nmlen, // file name length $exlen, // extra field length 0, // file comment length 0, // disk number start 0, // internal file attributes $dosattr, // external file attributes $this->offset); // relative offset of local header // Add it to the data & directory streams $this->_add_data($lfh); $this->_add_data($name); $this->_add_data($extra); $this->_add_data($data); $this->directory .= $dfh; $this->directory .= $name; $this->directory .= $extra; } // Returns the final archive data that still needs to be written function finish() { $dirlen = strlen($this->directory); // End of central directory record $eod = pack('VvvvvVVv', 0x06054b50, // end of central dir signature 0, // number of this disk 0, // number of the disk with the start of the central directory $this->count, // total number of entries in the central directory on this disk $this->count, // total number of entries in the central directory $dirlen, // size of the central directory $this->offset, // offset of start of central directory w.r.t. the starting disk number 0); // .ZIP file comment length $res = $this->data . $this->directory . $eod; $this->clear(); return $res; } } ?> |