[eluser]John Ashwin[/eluser]
FIXED::
I narrowed the problem down to a generic timestamps
in the packing of the data in the Zip library.
A modification of the way the data is stored for files,
worked! :cheese:
This is my replacement of the function _add_data() in
CI Native Zip library.
p.s: I've attached the fix to this post as well.
Code:
/**
* Mod by : John Christos
* Add Data to Zip With Dates To Correct no timestamp when
* extracted by winrar and stuffIt.
*
* @access private
* @param string the file name/path
* @param string the data to be encoded
* @return void
*/
function _add_data($filepath, $data, $time = 0)
{
$filepath = str_replace("\\", "/", $filepath);
// Create TimeStamp
$dtime = dechex($this->unix2DosTime($time));
$hexdtime = '\x' . $dtime[6] . $dtime[7]
. '\x' . $dtime[4] . $dtime[5]
. '\x' . $dtime[2] . $dtime[3]
. '\x' . $dtime[0] . $dtime[1];
eval('$hexdtime = "' . $hexdtime . '";');
// At this point the Timestamp is in $hexdtime;
$uncompressed_size = strlen($data);
$crc32 = crc32($data);
$gzdata = gzcompress($data);
$gzdata = substr($gzdata, 2, -4);
$compressed_size = strlen($gzdata);
$this->zipdata .=
"\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00" . $hexdtime
.pack('V', $crc32)
.pack('V', $compressed_size)
.pack('V', $uncompressed_size)
.pack('v', strlen($filepath)) // length of filename
.pack('v', 0) // extra field length
.$filepath
.$gzdata; // "file data" segment
$this->directory .=
"\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00\x00\x00\x00\x00"
.pack('V', $crc32)
.pack('V', $compressed_size)
.pack('V', $uncompressed_size)
.pack('v', strlen($filepath)) // length of filename
.pack('v', 0) // extra field length
.pack('v', 0) // file comment length
.pack('v', 0) // disk number start
.pack('v', 0) // internal file attributes
.pack('V', 32) // external file attributes - 'archive' bit set
.pack('V', $this->offset) // relative offset of local header
.$filepath;
$this->offset = strlen($this->zipdata);
$this->entries++;
$this->file_num++;
}
// --------------------------------------------------------------------
/**
* (This function is borrowed from http://drupal.org/node/83253)
* Converts an Unix timestamp to a four byte DOS date and time format (date
* in high two bytes, time in low two bytes allowing magnitude comparison).
*
* @param integer the current Unix timestamp
*
* @return integer the current date in a four byte DOS format
*
* @access private
*/
function unix2DosTime($unixtime = 0) {
$timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
if ($timearray['year'] < 1980) {
$timearray['year'] = 1980;
$timearray['mon'] = 1;
$timearray['mday'] = 1;
$timearray['hours'] = 0;
$timearray['minutes'] = 0;
$timearray['seconds'] = 0;
} // end if
return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |
($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
} // end of the 'unix2DosTime()' method
The zip files work brilliantly now with all unzipper softwares.
I hope this helps someone else as well.
All the best!!
Best Regards,
John Christos
