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phpbb_ynh/sources/phpBB/includes/functions_compress.php

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Add sources of phpBB
2015-03-07 14:50:13 +01:00
<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
exit;
}
/**
* Class for handling archives (compression/decompression)
*/
class compress
{
var $fp = 0;
/**
* @var array
*/
protected $filelist = array();
/**
* Add file to archive
*/
function add_file($src, $src_rm_prefix = '', $src_add_prefix = '', $skip_files = '')
{
global $phpbb_root_path;
$skip_files = explode(',', $skip_files);
// Remove rm prefix from src path
$src_path = ($src_rm_prefix) ? preg_replace('#^(' . preg_quote($src_rm_prefix, '#') . ')#', '', $src) : $src;
// Add src prefix
$src_path = ($src_add_prefix) ? ($src_add_prefix . ((substr($src_add_prefix, -1) != '/') ? '/' : '') . $src_path) : $src_path;
// Remove initial "/" if present
$src_path = (substr($src_path, 0, 1) == '/') ? substr($src_path, 1) : $src_path;
if (is_file($phpbb_root_path . $src))
{
$this->data($src_path, file_get_contents("$phpbb_root_path$src"), stat("$phpbb_root_path$src"), false);
}
else if (is_dir($phpbb_root_path . $src))
{
// Clean up path, add closing / if not present
$src_path = ($src_path && substr($src_path, -1) != '/') ? $src_path . '/' : $src_path;
$filelist = array();
$filelist = filelist("$phpbb_root_path$src", '', '*');
krsort($filelist);
/**
* Commented out, as adding the folders produces corrupted archives
if ($src_path)
{
$this->data($src_path, '', true, stat("$phpbb_root_path$src"));
}
*/
foreach ($filelist as $path => $file_ary)
{
/**
* Commented out, as adding the folders produces corrupted archives
if ($path)
{
// Same as for src_path
$path = (substr($path, 0, 1) == '/') ? substr($path, 1) : $path;
$path = ($path && substr($path, -1) != '/') ? $path . '/' : $path;
$this->data("$src_path$path", '', true, stat("$phpbb_root_path$src$path"));
}
*/
foreach ($file_ary as $file)
{
if (in_array($path . $file, $skip_files))
{
continue;
}
$this->data("$src_path$path$file", file_get_contents("$phpbb_root_path$src$path$file"), stat("$phpbb_root_path$src$path$file"), false);
}
}
}
else
{
// $src does not exist
return false;
}
return true;
}
/**
* Add custom file (the filepath will not be adjusted)
*/
function add_custom_file($src, $filename)
{
if (!file_exists($src))
{
return false;
}
$this->data($filename, file_get_contents($src), stat($src), false);
return true;
}
/**
* Add file data
*/
function add_data($src, $name)
{
$stat = array();
$stat[2] = 436; //384
$stat[4] = $stat[5] = 0;
$stat[7] = strlen($src);
$stat[9] = time();
$this->data($name, $src, $stat, false);
return true;
}
/**
* Checks if a file by that name as already been added and, if it has,
* returns a new, unique name.
*
* @param string $name The filename
* @return string A unique filename
*/
protected function unique_filename($name)
{
if (isset($this->filelist[$name]))
{
$start = $name;
$ext = '';
$this->filelist[$name]++;
// Separate the extension off the end of the filename to preserve it
$pos = strrpos($name, '.');
if ($pos !== false)
{
$start = substr($name, 0, $pos);
$ext = substr($name, $pos);
}
return $start . '_' . $this->filelist[$name] . $ext;
}
$this->filelist[$name] = 0;
return $name;
}
/**
* Return available methods
*
* @return array Array of strings of available compression methods (.tar, .tar.gz, .zip, etc.)
*/
static public function methods()
{
$methods = array('.tar');
$available_methods = array('.tar.gz' => 'zlib', '.tar.bz2' => 'bz2', '.zip' => 'zlib');
foreach ($available_methods as $type => $module)
{
if (!@extension_loaded($module))
{
continue;
}
$methods[] = $type;
}
return $methods;
}
}
/**
* Zip creation class from phpMyAdmin 2.3.0 (c) Tobias Ratschiller, Olivier M<EFBFBD>ller, Lo<EFBFBD>c Chapeaux,
* Marc Delisle, http://www.phpmyadmin.net/
*
* Zip extraction function by Alexandre Tedeschi, alexandrebr at gmail dot com
*
* Modified extensively by psoTFX and DavidMJ, (c) phpBB Limited, 2003
*
* Based on work by Eric Mueller and Denis125
* Official ZIP file format: http://www.pkware.com/appnote.txt
*/
class compress_zip extends compress
{
var $datasec = array();
var $ctrl_dir = array();
var $eof_cdh = "\x50\x4b\x05\x06\x00\x00\x00\x00";
var $old_offset = 0;
var $datasec_len = 0;
/**
* Constructor
*/
function compress_zip($mode, $file)
{
$this->fp = @fopen($file, $mode . 'b');
if (!$this->fp)
{
trigger_error('Unable to open file ' . $file . ' [' . $mode . 'b]');
}
}
/**
* Convert unix to dos time
*/
function unix_to_dos_time($time)
{
$timearray = (!$time) ? getdate() : getdate($time);
if ($timearray['year'] < 1980)
{
$timearray['year'] = 1980;
$timearray['mon'] = $timearray['mday'] = 1;
$timearray['hours'] = $timearray['minutes'] = $timearray['seconds'] = 0;
}
return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
}
/**
* Extract archive
*/
function extract($dst)
{
// Loop the file, looking for files and folders
$dd_try = false;
rewind($this->fp);
while (!feof($this->fp))
{
// Check if the signature is valid...
$signature = fread($this->fp, 4);
switch ($signature)
{
// 'Local File Header'
case "\x50\x4b\x03\x04":
// Lets get everything we need.
// We don't store the version needed to extract, the general purpose bit flag or the date and time fields
$data = unpack("@4/vc_method/@10/Vcrc/Vc_size/Vuc_size/vname_len/vextra_field", fread($this->fp, 26));
$file_name = fread($this->fp, $data['name_len']); // filename
if ($data['extra_field'])
{
fread($this->fp, $data['extra_field']); // extra field
}
$target_filename = "$dst$file_name";
if (!$data['uc_size'] && !$data['crc'] && substr($file_name, -1, 1) == '/')
{
if (!is_dir($target_filename))
{
$str = '';
$folders = explode('/', $target_filename);
// Create and folders and subfolders if they do not exist
foreach ($folders as $folder)
{
$folder = trim($folder);
if (!$folder)
{
continue;
}
$str = (!empty($str)) ? $str . '/' . $folder : $folder;
if (!is_dir($str))
{
if (!@mkdir($str, 0777))
{
trigger_error("Could not create directory $folder");
}
phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE);
}
}
}
// This is a directory, we are not writting files
continue;
}
else
{
// Some archivers are punks, they don't include folders in their archives!
$str = '';
$folders = explode('/', pathinfo($target_filename, PATHINFO_DIRNAME));
// Create and folders and subfolders if they do not exist
foreach ($folders as $folder)
{
$folder = trim($folder);
if (!$folder)
{
continue;
}
$str = (!empty($str)) ? $str . '/' . $folder : $folder;
if (!is_dir($str))
{
if (!@mkdir($str, 0777))
{
trigger_error("Could not create directory $folder");
}
phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE);
}
}
}
if (!$data['uc_size'])
{
$content = '';
}
else
{
$content = fread($this->fp, $data['c_size']);
}
$fp = fopen($target_filename, "w");
switch ($data['c_method'])
{
case 0:
// Not compressed
fwrite($fp, $content);
break;
case 8:
// Deflate
fwrite($fp, gzinflate($content, $data['uc_size']));
break;
case 12:
// Bzip2
fwrite($fp, bzdecompress($content));
break;
}
fclose($fp);
break;
// We hit the 'Central Directory Header', we can stop because nothing else in here requires our attention
// or we hit the end of the central directory record, we can safely end the loop as we are totally finished with looking for files and folders
case "\x50\x4b\x01\x02":
// This case should simply never happen.. but it does exist..
case "\x50\x4b\x05\x06":
break 2;
// 'Packed to Removable Disk', ignore it and look for the next signature...
case 'PK00':
continue 2;
// We have encountered a header that is weird. Lets look for better data...
default:
if (!$dd_try)
{
// Unexpected header. Trying to detect wrong placed 'Data Descriptor';
$dd_try = true;
fseek($this->fp, 8, SEEK_CUR); // Jump over 'crc-32'(4) 'compressed-size'(4), 'uncompressed-size'(4)
continue 2;
}
trigger_error("Unexpected header, ending loop");
break 2;
}
$dd_try = false;
}
}
/**
* Close archive
*/
function close()
{
// Write out central file directory and footer ... if it exists
if (sizeof($this->ctrl_dir))
{
fwrite($this->fp, $this->file());
}
fclose($this->fp);
}
/**
* Create the structures ... note we assume version made by is MSDOS
*/
function data($name, $data, $stat, $is_dir = false)
{
$name = str_replace('\\', '/', $name);
$name = $this->unique_filename($name);
$hexdtime = pack('V', $this->unix_to_dos_time($stat[9]));
if ($is_dir)
{
$unc_len = $c_len = $crc = 0;
$zdata = '';
$var_ext = 10;
}
else
{
$unc_len = strlen($data);
$crc = crc32($data);
$zdata = gzdeflate($data);
$c_len = strlen($zdata);
$var_ext = 20;
// Did we compress? No, then use data as is
if ($c_len >= $unc_len)
{
$zdata = $data;
$c_len = $unc_len;
$var_ext = 10;
}
}
unset($data);
// If we didn't compress set method to store, else deflate
$c_method = ($c_len == $unc_len) ? "\x00\x00" : "\x08\x00";
// Are we a file or a directory? Set archive for file
$attrib = ($is_dir) ? 16 : 32;
// File Record Header
$fr = "\x50\x4b\x03\x04"; // Local file header 4bytes
$fr .= pack('v', $var_ext); // ver needed to extract 2bytes
$fr .= "\x00\x00"; // gen purpose bit flag 2bytes
$fr .= $c_method; // compression method 2bytes
$fr .= $hexdtime; // last mod time and date 2+2bytes
$fr .= pack('V', $crc); // crc32 4bytes
$fr .= pack('V', $c_len); // compressed filesize 4bytes
$fr .= pack('V', $unc_len); // uncompressed filesize 4bytes
$fr .= pack('v', strlen($name));// length of filename 2bytes
$fr .= pack('v', 0); // extra field length 2bytes
$fr .= $name;
$fr .= $zdata;
unset($zdata);
$this->datasec_len += strlen($fr);
// Add data to file ... by writing data out incrementally we save some memory
fwrite($this->fp, $fr);
unset($fr);
// Central Directory Header
$cdrec = "\x50\x4b\x01\x02"; // header 4bytes
$cdrec .= "\x00\x00"; // version made by
$cdrec .= pack('v', $var_ext); // version needed to extract
$cdrec .= "\x00\x00"; // gen purpose bit flag
$cdrec .= $c_method; // compression method
$cdrec .= $hexdtime; // last mod time & date
$cdrec .= pack('V', $crc); // crc32
$cdrec .= pack('V', $c_len); // compressed filesize
$cdrec .= pack('V', $unc_len); // uncompressed filesize
$cdrec .= pack('v', strlen($name)); // length of filename
$cdrec .= pack('v', 0); // extra field length
$cdrec .= pack('v', 0); // file comment length
$cdrec .= pack('v', 0); // disk number start
$cdrec .= pack('v', 0); // internal file attributes
$cdrec .= pack('V', $attrib); // external file attributes
$cdrec .= pack('V', $this->old_offset); // relative offset of local header
$cdrec .= $name;
// Save to central directory
$this->ctrl_dir[] = $cdrec;
$this->old_offset = $this->datasec_len;
}
/**
* file
*/
function file()
{
$ctrldir = implode('', $this->ctrl_dir);
return $ctrldir . $this->eof_cdh .
pack('v', sizeof($this->ctrl_dir)) . // total # of entries "on this disk"
pack('v', sizeof($this->ctrl_dir)) . // total # of entries overall
pack('V', strlen($ctrldir)) . // size of central dir
pack('V', $this->datasec_len) . // offset to start of central dir
"\x00\x00"; // .zip file comment length
}
/**
* Download archive
*/
function download($filename, $download_name = false)
{
global $phpbb_root_path;
if ($download_name === false)
{
$download_name = $filename;
}
$mimetype = 'application/zip';
header('Cache-Control: private, no-cache');
header("Content-Type: $mimetype; name=\"$download_name.zip\"");
header("Content-disposition: attachment; filename=$download_name.zip");
$fp = @fopen("{$phpbb_root_path}store/$filename.zip", 'rb');
if ($fp)
{
while ($buffer = fread($fp, 1024))
{
echo $buffer;
}
fclose($fp);
}
}
}
/**
* Tar/tar.gz compression routine
* Header/checksum creation derived from tarfile.pl, (c) Tom Horsley, 1994
*/
class compress_tar extends compress
{
var $isgz = false;
var $isbz = false;
var $filename = '';
var $mode = '';
var $type = '';
var $wrote = false;
/**
* Constructor
*/
function compress_tar($mode, $file, $type = '')
{
$type = (!$type) ? $file : $type;
$this->isgz = preg_match('#(\.tar\.gz|\.tgz)$#', $type);
$this->isbz = preg_match('#\.tar\.bz2$#', $type);
$this->mode = &$mode;
$this->file = &$file;
$this->type = &$type;
$this->open();
}
/**
* Extract archive
*/
function extract($dst)
{
$fzread = ($this->isbz && function_exists('bzread')) ? 'bzread' : (($this->isgz && @extension_loaded('zlib')) ? 'gzread' : 'fread');
// Run through the file and grab directory entries
while ($buffer = $fzread($this->fp, 512))
{
$tmp = unpack('A6magic', substr($buffer, 257, 6));
if (trim($tmp['magic']) == 'ustar')
{
$tmp = unpack('A100name', $buffer);
$filename = trim($tmp['name']);
$tmp = unpack('Atype', substr($buffer, 156, 1));
$filetype = (int) trim($tmp['type']);
$tmp = unpack('A12size', substr($buffer, 124, 12));
$filesize = octdec((int) trim($tmp['size']));
$target_filename = "$dst$filename";
if ($filetype == 5)
{
if (!is_dir($target_filename))
{
$str = '';
$folders = explode('/', $target_filename);
// Create and folders and subfolders if they do not exist
foreach ($folders as $folder)
{
$folder = trim($folder);
if (!$folder)
{
continue;
}
$str = (!empty($str)) ? $str . '/' . $folder : $folder;
if (!is_dir($str))
{
if (!@mkdir($str, 0777))
{
trigger_error("Could not create directory $folder");
}
phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE);
}
}
}
}
else if ($filesize >= 0 && ($filetype == 0 || $filetype == "\0"))
{
// Some archivers are punks, they don't properly order the folders in their archives!
$str = '';
$folders = explode('/', pathinfo($target_filename, PATHINFO_DIRNAME));
// Create and folders and subfolders if they do not exist
foreach ($folders as $folder)
{
$folder = trim($folder);
if (!$folder)
{
continue;
}
$str = (!empty($str)) ? $str . '/' . $folder : $folder;
if (!is_dir($str))
{
if (!@mkdir($str, 0777))
{
trigger_error("Could not create directory $folder");
}
phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE);
}
}
// Write out the files
if (!($fp = fopen($target_filename, 'wb')))
{
trigger_error("Couldn't create file $filename");
}
phpbb_chmod($target_filename, CHMOD_READ);
// Grab the file contents
fwrite($fp, ($filesize) ? $fzread($this->fp, ($filesize + 511) &~ 511) : '', $filesize);
fclose($fp);
}
}
}
}
/**
* Close archive
*/
function close()
{
$fzclose = ($this->isbz && function_exists('bzclose')) ? 'bzclose' : (($this->isgz && @extension_loaded('zlib')) ? 'gzclose' : 'fclose');
if ($this->wrote)
{
$fzwrite = ($this->isbz && function_exists('bzwrite')) ? 'bzwrite' : (($this->isgz && @extension_loaded('zlib')) ? 'gzwrite' : 'fwrite');
// The end of a tar archive ends in two records of all NULLs (1024 bytes of \0)
$fzwrite($this->fp, str_repeat("\0", 1024));
}
$fzclose($this->fp);
}
/**
* Create the structures
*/
function data($name, $data, $stat, $is_dir = false)
{
$name = $this->unique_filename($name);
$this->wrote = true;
$fzwrite = ($this->isbz && function_exists('bzwrite')) ? 'bzwrite' : (($this->isgz && @extension_loaded('zlib')) ? 'gzwrite' : 'fwrite');
$typeflag = ($is_dir) ? '5' : '';
// This is the header data, it contains all the info we know about the file or folder that we are about to archive
$header = '';
$header .= pack('a100', $name); // file name
$header .= pack('a8', sprintf("%07o", $stat[2])); // file mode
$header .= pack('a8', sprintf("%07o", $stat[4])); // owner id
$header .= pack('a8', sprintf("%07o", $stat[5])); // group id
$header .= pack('a12', sprintf("%011o", $stat[7])); // file size
$header .= pack('a12', sprintf("%011o", $stat[9])); // last mod time
// Checksum
$checksum = 0;
for ($i = 0; $i < 148; $i++)
{
$checksum += ord($header[$i]);
}
// We precompute the rest of the hash, this saves us time in the loop and allows us to insert our hash without resorting to string functions
$checksum += 2415 + (($is_dir) ? 53 : 0);
$header .= pack('a8', sprintf("%07o", $checksum)); // checksum
$header .= pack('a1', $typeflag); // link indicator
$header .= pack('a100', ''); // name of linked file
$header .= pack('a6', 'ustar'); // ustar indicator
$header .= pack('a2', '00'); // ustar version
$header .= pack('a32', 'Unknown'); // owner name
$header .= pack('a32', 'Unknown'); // group name
$header .= pack('a8', ''); // device major number
$header .= pack('a8', ''); // device minor number
$header .= pack('a155', ''); // filename prefix
$header .= pack('a12', ''); // end
// This writes the entire file in one shot. Header, followed by data and then null padded to a multiple of 512
$fzwrite($this->fp, $header . (($stat[7] !== 0 && !$is_dir) ? $data . str_repeat("\0", (($stat[7] + 511) &~ 511) - $stat[7]) : ''));
unset($data);
}
/**
* Open archive
*/
function open()
{
$fzopen = ($this->isbz && function_exists('bzopen')) ? 'bzopen' : (($this->isgz && @extension_loaded('zlib')) ? 'gzopen' : 'fopen');
$this->fp = @$fzopen($this->file, $this->mode . (($fzopen == 'bzopen') ? '' : 'b') . (($fzopen == 'gzopen') ? '9' : ''));
if (!$this->fp)
{
trigger_error('Unable to open file ' . $this->file . ' [' . $fzopen . ' - ' . $this->mode . 'b]');
}
}
/**
* Download archive
*/
function download($filename, $download_name = false)
{
global $phpbb_root_path;
if ($download_name === false)
{
$download_name = $filename;
}
switch ($this->type)
{
case '.tar':
$mimetype = 'application/x-tar';
break;
case '.tar.gz':
$mimetype = 'application/x-gzip';
break;
case '.tar.bz2':
$mimetype = 'application/x-bzip2';
break;
default:
$mimetype = 'application/octet-stream';
break;
}
header('Cache-Control: private, no-cache');
header("Content-Type: $mimetype; name=\"$download_name$this->type\"");
header("Content-disposition: attachment; filename=$download_name$this->type");
$fp = @fopen("{$phpbb_root_path}store/$filename$this->type", 'rb');
if ($fp)
{
while ($buffer = fread($fp, 1024))
{
echo $buffer;
}
fclose($fp);
}
}
}
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