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410 lines
12 KiB
PHP
410 lines
12 KiB
PHP
<?
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/***************************************************************************
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* functions_compress.php
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* -------------------
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* begin : Saturday, Jul 19, 2003
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* copyright : (C) 2001 The phpBB Group
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* email : support@phpbb.com
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*
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* $Id$
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*
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***************************************************************************/
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/***************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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***************************************************************************/
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class compress
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{
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var $fp = 0;
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function add_file($src, $src_prefix = '', $skip_files = '')
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{
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global $phpbb_root_path;
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$skip_files = explode(',', $skip_files);
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if (is_file($phpbb_root_path . $src))
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{
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$src_prefix = ($src_prefix) ? preg_replace('#^(' . preg_quote($src_prefix) . ')#', '', $src) : $src;
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if (!($fp = @fopen($phpbb_root_path . $src, 'rb')))
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{
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return false;
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}
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$data = fread($fp, filesize($phpbb_root_path . $src));
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fclose($fp);
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$this->data($src_prefix, $data, filemtime($phpbb_root_path . $src), false);
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}
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else if (is_dir($phpbb_root_path . $src))
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{
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// Remove prefix from src path
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$src_prefix = ($src_prefix) ? preg_replace('#^(' . preg_quote($src_prefix) . ')#', '', $src) : $src;
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// Clean up path, remove initial / if present, add ending / if not present
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$src_prefix = (strpos($src_prefix, '/') === 0) ? substr($src_prefix, 1) : $src_prefix;
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$src_prefix = (strrpos($src_prefix, '/') != strlen($src_prefix) - 1) ? (($src_prefix != '') ? $src_prefix . '/' : '') : $src_prefix;
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$filelist = filelist($phpbb_root_path . $src, '', '*');
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ksort($filelist);
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if ($src_prefix)
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{
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$this->data($src_prefix, '', filemtime($src_prefix), true);
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}
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foreach ($filelist as $path => $file_ary)
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{
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if ($path)
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{
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// Same as for src_prefix
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$path = (strpos($path, '/') === 0) ? substr($path, 1) : $path;
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$path = (strrpos($path, '/') != strlen($path) - 1) ? $path . '/' : $path;
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$this->data($src_prefix . $path, '', filemtime($src_prefix . $path), true);
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}
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foreach ($file_ary as $file)
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{
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if (in_array($path . $file, $skip_files))
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{
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continue;
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}
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$this->data($src_prefix . $path . $file, implode('', file($phpbb_root_path . $src . $path . $file)), filemtime($phpbb_root_path . $src . $path . $file), false);
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}
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}
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}
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return true;
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}
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function add_data($src, $name)
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{
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$this->data($name, $src);
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return true;
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}
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}
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// Zip creation class from phpMyAdmin 2.3.0 <20> Tobias Ratschiller, Olivier M<>ller, Lo<4C>c Chapeaux, Marc Delisle
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// http://www.phpmyadmin.net/
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//
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// Modified extensively by psoTFX, <20> phpBB Group, 2003
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//
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// Based on work by Eric Mueller and Denis125
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// Official ZIP file format: http://www.pkware.com/appnote.txt
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class compress_zip extends compress
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{
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var $datasec = array();
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var $ctrl_dir = array();
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var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
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var $old_offset = 0;
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var $datasec_len = 0;
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function compress_zip($mode, $file)
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{
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return $this->fp = @fopen($phpbb_root_path . $file, $mode . 'b');
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}
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function unix_to_dos_time($time)
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{
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$timearray = (!$time) ? getdate() : getdate($time);
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if ($timearray['year'] < 1980)
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{
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$timearray['year'] = 1980;
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$timearray['mon'] = $timearray['mday'] = 1;
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$timearray['hours'] = $timearray['minutes'] = $timearray['seconds'] = 0;
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}
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return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
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}
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function extract($dst)
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{
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$header = $data = '';
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fseek($this->fp, -14, SEEK_END);
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$tmp = unpack("ventries/vtotentries/Vctsize/Vctpos", fread($this->fp, 12));
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$entries = (int) trim($tmp['entries']);
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$totentries = (int) trim($tmp['totentries']);
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$ctsize = (int) trim($tmp['ctsize']);
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$ctpos = (int) trim($tmp['ctpos']);
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for ($i = 0; $i < $entries; $i++)
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{
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fseek($this->fp, $ctpos);
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$buffer = fread($this->fp, 46);
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$tmp = unpack("Vcrc/Vc_size/Vuc_size/vstrlen", substr($buffer, 16, 14));
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$crc = (int) trim($tmp['crc']);
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$c_size = (int) trim($tmp['c_size']);
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$uc_size = (int) trim($tmp['uc_size']);
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$strlen = (int) trim($tmp['strlen']);
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$tmp = unpack("Vattrib/Voffset", substr($buffer, 38, 8));
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$attrib = (int) trim($tmp['attrib']);
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$offset = (int) trim($tmp['offset']);
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$filename = fread($this->fp, $strlen);
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$ctpos = ftell($this->fp);
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if ($attrib == 0x41FF0010)
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{
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mkdir($dst . $filename);
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}
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else
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{
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fseek($this->fp, $offset + 30 + $strlen);
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// We have to fudge here for time being
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// Read buffer, prepend and append gz file header/footer
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$buffer = pack('va1a1Va1a1', 0x8b1f, chr(0x08), chr(0x00), time(), chr(0x00), chr(3)) . fread($this->fp, $c_size) . pack("VV", $crc, $uc_size);
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if (!($fp = fopen($dst . $filename . '.gz', 'wb')))
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{
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die("Could not open temporary $filename.gz");
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}
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fwrite($fp, $buffer);
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fclose($fp);
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unset($buffer);
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unset($fp);
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if (!($fp = fopen($dst . $filename, 'wb')))
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{
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die("Could not open $filename");
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}
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if (!($gzfp = gzopen($dst . $filename . '.gz', 'rb')))
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{
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die("Could not open temporary $filename.gz");
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}
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while ($buffer = gzread($gzfp, 1024))
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{
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fwrite($fp, $buffer);
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}
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gzclose($gzfp);
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fclose($fp);
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unlink($dst . $filename . '.gz');
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}
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}
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}
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function close()
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{
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// Write out central file directory and footer
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fwrite($this->fp, $this->file());
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fclose($this->fp);
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}
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function data($name, $data, $mtime = false, $is_dir = false)
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{
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$name = str_replace('\\', '/', $name);
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$dtime = dechex($this->unix_to_dos_time($mtime));
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$hexdtime = '\x' . $dtime[6] . $dtime[7] . '\x' . $dtime[4] . $dtime[5] . '\x' . $dtime[2] . $dtime[3] . '\x' . $dtime[0] . $dtime[1];
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eval('$hexdtime = "' . $hexdtime . '";');
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$unc_len = strlen($data);
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$crc = crc32($data);
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$zdata = gzcompress($data);
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$zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
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$c_len = strlen($zdata);
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unset($data);
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$fr = "\x50\x4b\x03\x04"; //
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$fr .= "\x14\x00"; // ver needed to extract 4
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$fr .= "\x00\x00"; // gen purpose bit flag 6
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$fr .= "\x08\x00"; // compression method 8
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$fr .= $hexdtime; // last mod time and date 10
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$fr .= pack('V', $crc); // crc32 14
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$fr .= pack('V', $c_len); // compressed filesize 18
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$fr .= pack('V', $unc_len); // uncompressed filesize 22
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$fr .= pack('v', strlen($name));// length of filename 26
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$fr .= pack('v', 0); // extra field length 28
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$fr .= $name; // 30
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$fr .= $zdata;
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unset($zdata);
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$fr .= pack('V', $crc);
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$fr .= pack('V', $c_len); // compressed filesize
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$fr .= pack('V', $unc_len); // uncompressed filesize
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$this->datasec_len += strlen($fr);
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// Add data to file ... by writing data out incrementally we
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// save some memory
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fwrite($this->fp, $fr);
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unset($fr);
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// Are we a file or a directory? Set archive for file
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$attrib = ($is_dir) ? 0x41FF0010 : 32;
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$cdrec = "\x50\x4b\x01\x02";
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$cdrec .= "\x00\x00"; // version made by
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$cdrec .= "\x14\x00"; // version needed to extract
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$cdrec .= "\x00\x00"; // gen purpose bit flag
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$cdrec .= "\x08\x00"; // compression method
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$cdrec .= $hexdtime; // last mod time & date
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$cdrec .= pack('V', $crc); // crc32
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$cdrec .= pack('V', $c_len); // compressed filesize
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$cdrec .= pack('V', $unc_len); // uncompressed filesize
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$cdrec .= pack('v', strlen($name)); // length of filename
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$cdrec .= pack('v', 0); // extra field length
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$cdrec .= pack('v', 0); // file comment length
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$cdrec .= pack('v', 0); // disk number start
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$cdrec .= pack('v', 0); // internal file attributes
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$cdrec .= pack('V', $attrib); // external file attributes
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$cdrec .= pack('V', $this->old_offset); // relative offset of local header
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$cdrec .= $name;
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// Save to central directory
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$this->ctrl_dir[] = $cdrec;
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$this->old_offset = $this->datasec_len;
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}
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function file()
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{
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$ctrldir = implode('', $this->ctrl_dir);
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return $ctrldir . $this->eof_ctrl_dir .
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pack('v', sizeof($this->ctrl_dir)) . // total # of entries "on this disk"
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pack('v', sizeof($this->ctrl_dir)) . // total # of entries overall
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pack('V', strlen($ctrldir)) . // size of central dir
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pack('V', $this->datasec_len) . // offset to start of central dir
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"\x00\x00"; // .zip file comment length
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}
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}
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// Tar/tar.gz compression routine
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// Header/checksum creation derived from tarfile.pl, <20> Tom Horsley, 1994
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class compress_tar extends compress
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{
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var $fzopen = '';
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var $fzclose = '';
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var $fzread = '';
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var $fzwrite = '';
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var $isgz = false;
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var $isbz = false;
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function compress_tar($mode, $file)
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{
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$this->isgz = (strpos($file, '.tar.gz') !== false || strpos($file, '.tgz') !== false) ? true : false;
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$this->isbz = (strpos($file, '.tar.bz2') !== false) ? true : false;
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$fzopen = ($this->isbz && function_exists('bzopen')) ? 'bzopen' : (($this->isgz && extension_loaded('zlib')) ? 'gzopen' : 'fopen');
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return $this->fp = @$fzopen($phpbb_root_path . $file, $mode . 'b');
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}
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function extract($dst)
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{
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$fzread = ($this->isbz && function_exists('bzread')) ? 'bzread' : (($this->isgz && extension_loaded('zlib')) ? 'gzread' : 'fread');
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$header = $data = '';
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$size = 0;
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while ($buffer = $fzread($this->fp, 512))
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{
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$tmp = unpack("A6magic", substr($buffer, 257, 6));
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if (trim($tmp['magic']) == 'ustar')
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{
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$tmp = unpack("A100name", $buffer);
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$filename = trim($tmp['name']);
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$tmp = unpack("Atype", substr($buffer, 156, 1));
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$filetype = (int) trim($tmp['type']);
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if ($filetype == 5)
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{
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mkdir($dst . $filename);
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continue;
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}
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else
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{
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$tmp = unpack("A12size", substr($buffer, 124, 12));
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$filesize = octdec((int) trim($tmp['size']));
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if (!($fp = fopen($dst . $filename, 'wb')))
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{
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trigger_error('Could not open file for output');
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}
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$size = 0;
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continue;
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}
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}
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$size += 512;
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$length = ($size > $filesize) ? 512 - ($size - $filesize) : 512;
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$tmp = unpack("A512data", $buffer);
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fwrite($fp, (string) $tmp['data'], $length);
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unset($buffer);
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}
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}
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function close()
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{
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$fzclose = ($this->isbz && function_exists('bzclose')) ? 'bzclose' : (($this->isgz && extension_loaded('zlib')) ? 'gzclose' : 'fclose');
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$fzclose($this->fp);
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}
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function data($name, $data, $mtime = false, $is_dir = false)
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{
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$fzwrite = ($this->isbz && function_exists('bzwrite')) ? 'bzwrite' : (($this->isgz && extension_loaded('zlib')) ? 'gzwrite' : 'fwrite');
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$mode = ($is_dir) ? '493' : '436';
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$mtime = (!$mtime) ? time() : $mtime;
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$filesize = ($is_dir) ? 0 : strlen($data);
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$typeflag = ($is_dir) ? '5' : '';
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$header = '';
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$header .= pack("a100", $name);
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$header .= pack("a8", sprintf("%07o", $mode));
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$header .= pack("a8", sprintf("%07o", 0));
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$header .= pack("a8", sprintf("%07o", 0));
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$header .= pack("a12", sprintf("%011o", $filesize));
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$header .= pack("a12", sprintf("%011o", $mtime));
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$header .= ' ';
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$header .= pack("a", $typeflag);
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$header .= pack("a100", '');
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$header .= 'ustar';
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$header .= pack("x");
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$header .= '00';
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$header .= pack("x247");
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// Checksum
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for ($i = 0; $i < 512; $i++)
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{
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$b = unpack("c1char", substr($header, $i, 1));
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$checksum += $b['char'];
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}
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$header = substr_replace($header, pack("a8",sprintf("%07o", $checksum)), 148, 8);
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$fzwrite($this->fp, $header);
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$i = 0;
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// Read the data 512 bytes at a time and write it out
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while ($buffer = substr($data, $i, 512))
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{
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$fzwrite($this->fp, pack("a512", $buffer));
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$i += 512;
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}
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unset($data);
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}
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}
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?>
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