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Extract .zip ... damn gzuncompress

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git-svn-id: file:///svn/phpbb/trunk@4309 89ea8834-ac86-4346-8a33-228a782c2dd0
This commit is contained in:
Paul S. Owen 2003-07-21 22:54:46 +00:00
parent 71cc8e79b3
commit 971968b08c
1 changed files with 81 additions and 11 deletions
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92
phpBB/includes/functions_compress.php
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@ -130,6 +130,76 @@ class compress_zip extends compress
function extract($dst)
{
$header = $data = '';
fseek($this->fp, -14, SEEK_END);
$tmp = unpack("ventries/vtotentries/Vctsize/Vctpos", fread($this->fp, 12));
$entries = (int) trim($tmp['entries']);
$totentries = (int) trim($tmp['totentries']);
$ctsize = (int) trim($tmp['ctsize']);
$ctpos = (int) trim($tmp['ctpos']);
for ($i = 0; $i < $entries; $i++)
{
fseek($this->fp, $ctpos);
$buffer = fread($this->fp, 46);
$tmp = unpack("Vcrc/Vc_size/Vuc_size/vstrlen", substr($buffer, 16, 14));
$crc = (int) trim($tmp['crc']);
$c_size = (int) trim($tmp['c_size']);
$uc_size = (int) trim($tmp['uc_size']);
$strlen = (int) trim($tmp['strlen']);
$tmp = unpack("Vattrib/Voffset", substr($buffer, 38, 8));
$attrib = (int) trim($tmp['attrib']);
$offset = (int) trim($tmp['offset']);
$filename = fread($this->fp, $strlen);
$ctpos = ftell($this->fp);
if ($attrib == 0x41FF0010)
{
mkdir($dst . $filename);
}
else
{
fseek($this->fp, $offset + 30 + $strlen);
// We have to fudge here for time being
// Read buffer, prepend and append gz file header/footer
$buffer = pack('va1a1Va1a1', 0x8b1f, chr(0x08), chr(0x00), time(), chr(0x00), chr(3)) . fread($this->fp, $c_size) . pack("VV", $crc, $uc_size);
if (!($fp = fopen($dst . $filename . '.gz', 'wb')))
{
die("Could not open temporary $filename.gz");
}
fwrite($fp, $buffer);
fclose($fp);
unset($buffer);
unset($fp);
if (!($fp = fopen($dst . $filename, 'wb')))
{
die("Could not open $filename");
}
if (!($gzfp = gzopen($dst . $filename . '.gz', 'rb')))
{
die("Could not open temporary $filename.gz");
}
while ($buffer = gzread($gzfp, 1024))
{
fwrite($fp, $buffer);
}
gzclose($gzfp);
fclose($fp);
unlink($dst . $filename . '.gz');
}
}
}
function close()
@ -154,17 +224,17 @@ class compress_zip extends compress
$c_len = strlen($zdata);
unset($data);
$fr = "\x50\x4b\x03\x04";
$fr .= "\x14\x00"; // ver needed to extract
$fr .= "\x00\x00"; // gen purpose bit flag
$fr .= "\x08\x00"; // compression method
$fr .= $hexdtime; // last mod time and date
$fr .= pack('V', $crc); // crc32
$fr .= pack('V', $c_len); // compressed filesize
$fr .= pack('V', $unc_len); // uncompressed filesize
$fr .= pack('v', strlen($name));// length of filename
$fr .= pack('v', 0); // extra field length
$fr .= $name;
$fr = "\x50\x4b\x03\x04"; //
$fr .= "\x14\x00"; // ver needed to extract 4
$fr .= "\x00\x00"; // gen purpose bit flag 6
$fr .= "\x08\x00"; // compression method 8
$fr .= $hexdtime; // last mod time and date 10
$fr .= pack('V', $crc); // crc32 14
$fr .= pack('V', $c_len); // compressed filesize 18
$fr .= pack('V', $unc_len); // uncompressed filesize 22
$fr .= pack('v', strlen($name));// length of filename 26
$fr .= pack('v', 0); // extra field length 28
$fr .= $name; // 30
$fr .= $zdata;
unset($zdata);
$fr .= pack('V', $crc);