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synced 2025-08-17 10:30:49 +02:00
Unzip Functionality #229
This commit is contained in:
metal_gvc
@@ -24,6 +24,12 @@ class Zip
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public $offset = 0;
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public $now;
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private $_archive_info = array();
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private $_zip_signature = "\x50\x4b\x03\x04";
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private $_dir_signature = "\x50\x4b\x01\x02";
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private $_central_signature_end = "\x50\x4b\x05\x06";
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private $farc = null;
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/**
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* Constructor
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*/
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@@ -372,4 +378,302 @@ class Zip
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$this->offset = 0;
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}
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public function extract($zip_file, $target_dir = null)
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{
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$chmod = 0777;
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$this->_archive_info = array();
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$files = $this->_read_archive($zip_file);
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if (!$files) {
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return false;
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}
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$file_locations = array();
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foreach ($files as $file => $trash) {
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$dirname = pathinfo($file, PATHINFO_DIRNAME);
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$folders = explode('/', $dirname);
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$out_dn = $target_dir . '/' . $dirname;
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if ( !is_dir($out_dn)) {
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$str = '';
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foreach ($folders as $folder) {
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$str = $str ? $str . '/' . $folder : $folder;
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if ( !is_dir($target_dir . '/' . $str)) {
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if ( ! @mkdir($target_dir . '/' . $str)) {
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return false;
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}
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chmod($target_dir . '/' . $str, $chmod);
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}
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}
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}
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if (substr($file, -1, 1) == '/') {
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continue;
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}
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$file_locations[] = $file_location = $target_dir . '/' . $file;
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$this->_extract_file($file, $file_location);
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}
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$this->_archive_info = array();
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return $file_locations;
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}
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private function _read_archive($zip_file)
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{
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if (sizeof($this->_archive_info)) {
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return $this->_archive_info;
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}
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$fh = fopen($zip_file, 'r');
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$this->farc = &$fh;
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if ( !$fh) {
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return false;
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}
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if ( !$this->_read_file_list_by_eof($fh)) {
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if ( !$this->_read_files_by_signatures($fh)) {
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return false;
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}
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}
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return $this->_archive_info;
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}
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private function _read_file_list_by_eof(&$fh)
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{
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for ($x = 0; $x < 1024; $x++) {
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fseek($fh, -22 - $x, SEEK_END);
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$signature = fread($fh, 4);
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if ($signature == $this->_central_signature_end) {
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$eodir['disk_number_this'] = unpack("v", fread($fh, 2));
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$eodir['disk_number'] = unpack("v", fread($fh, 2));
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$eodir['total_entries_this'] = unpack("v", fread($fh, 2));
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$eodir['total_entries'] = unpack("v", fread($fh, 2));
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$eodir['size_of_cd'] = unpack("V", fread($fh, 4));
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$eodir['offset_start_cd'] = unpack("V", fread($fh, 4));
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$zip_comment_lenght = unpack("v", fread($fh, 2));
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$eodir['zipfile_comment'] = $zip_comment_lenght[1] ? fread($fh, $zip_comment_lenght[1]) : '';
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fseek($fh, $eodir['offset_start_cd'][1]);
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$signature = fread($fh, 4);
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while ($signature == $this->_dir_signature) {
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$dir['version_madeby'] = unpack("v", fread($fh, 2));
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$dir['version_needed'] = unpack("v", fread($fh, 2));
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$dir['general_bit_flag'] = unpack("v", fread($fh, 2));
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$dir['compression_method'] = unpack("v", fread($fh, 2));
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$dir['lastmod_time'] = unpack("v", fread($fh, 2));
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$dir['lastmod_date'] = unpack("v", fread($fh, 2));
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$dir['crc-32'] = fread($fh, 4);
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$dir['compressed_size'] = unpack("V", fread($fh, 4));
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$dir['uncompressed_size'] = unpack("V", fread($fh, 4));
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$zip_file_length = unpack("v", fread($fh, 2));
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$extra_field_length = unpack("v", fread($fh, 2));
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$fileCommentLength = unpack("v", fread($fh, 2));
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$dir['disk_number_start'] = unpack("v", fread($fh, 2));
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$dir['internal_attributes'] = unpack("v", fread($fh, 2));
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$dir['external_attributes1'] = unpack("v", fread($fh, 2));
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$dir['external_attributes2'] = unpack("v", fread($fh, 2));
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$dir['relative_offset'] = unpack("V", fread($fh, 4));
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$dir['file_name'] = fread($fh, $zip_file_length[1]);
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$dir['extra_field'] = $extra_field_length[1] ? fread($fh, $extra_field_length[1]) : '';
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$dir['file_comment'] = $fileCommentLength[1] ? fread($fh, $fileCommentLength[1]) : '';
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$binary_mod_date = str_pad(decbin($dir['lastmod_date'][1]), 16, '0', STR_PAD_LEFT);
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$binary_mod_time = str_pad(decbin($dir['lastmod_time'][1]), 16, '0', STR_PAD_LEFT);
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$last_mod_year = bindec(substr($binary_mod_date, 0, 7)) + 1980;
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$last_mod_month = bindec(substr($binary_mod_date, 7, 4));
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$last_mod_day = bindec(substr($binary_mod_date, 11, 5));
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$last_mod_hour = bindec(substr($binary_mod_time, 0, 5));
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$last_mod_minute = bindec(substr($binary_mod_time, 5, 6));
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$last_mod_second = bindec(substr($binary_mod_time, 11, 5));
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$central_dir_list[$dir['file_name']] = array(
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'version_madeby' => $dir['version_madeby'][1],
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'version_needed' => $dir['version_needed'][1],
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'general_bit_flag' => str_pad(decbin($dir['general_bit_flag'][1]), 8, '0', STR_PAD_LEFT),
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'compression_method' => $dir['compression_method'][1],
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'lastmod_datetime' => mktime($last_mod_hour, $last_mod_minute, $last_mod_second, $last_mod_month, $last_mod_day, $last_mod_year),
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'crc-32' => str_pad(dechex(ord($dir['crc-32'][3])), 2, '0', STR_PAD_LEFT) .
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str_pad(dechex(ord($dir['crc-32'][2])), 2, '0', STR_PAD_LEFT) .
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str_pad(dechex(ord($dir['crc-32'][1])), 2, '0', STR_PAD_LEFT) .
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str_pad(dechex(ord($dir['crc-32'][0])), 2, '0', STR_PAD_LEFT),
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'compressed_size' => $dir['compressed_size'][1],
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'uncompressed_size' => $dir['uncompressed_size'][1],
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'disk_number_start' => $dir['disk_number_start'][1],
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'internal_attributes' => $dir['internal_attributes'][1],
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'external_attributes1' => $dir['external_attributes1'][1],
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'external_attributes2' => $dir['external_attributes2'][1],
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'relative_offset' => $dir['relative_offset'][1],
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'file_name' => $dir['file_name'],
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'extra_field' => $dir['extra_field'],
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'file_comment' => $dir['file_comment'],
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);
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$signature = fread($fh, 4);
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}
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if (isset($central_dir_list)) {
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foreach ($central_dir_list as $filename => $details) {
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$i = $this->_get_file_header($fh, $details['relative_offset']);
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$this->_archive_info[$filename]['file_name'] = $filename;
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$this->_archive_info[$filename]['compression_method'] = $details['compression_method'];
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$this->_archive_info[$filename]['version_needed'] = $details['version_needed'];
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$this->_archive_info[$filename]['lastmod_datetime'] = $details['lastmod_datetime'];
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$this->_archive_info[$filename]['crc-32'] = $details['crc-32'];
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$this->_archive_info[$filename]['compressed_size'] = $details['compressed_size'];
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$this->_archive_info[$filename]['uncompressed_size'] = $details['uncompressed_size'];
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$this->_archive_info[$filename]['lastmod_datetime'] = $details['lastmod_datetime'];
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$this->_archive_info[$filename]['extra_field'] = $i['extra_field'];
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$this->_archive_info[$filename]['contents_start_offset'] = $i['contents_start_offset'];
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}
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}
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return true;
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}
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}
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return true;
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}
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private function _read_files_by_signatures(&$fh)
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{
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fseek($fh, 0);
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$return = false;
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for (;;) {
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$details = $this->_get_file_header($fh);
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if ( !$details) {
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fseek($fh, 12 - 4, SEEK_CUR);
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$details = $this->_get_file_header($fh);
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}
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if ( !$details) {
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break;
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}
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$filename = $details['file_name'];
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$this->_archive_info[$filename] = $details;
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$return = true;
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}
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return $return;
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}
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private function _get_file_header(&$fh, $start_offset = FALSE)
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{
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if ($start_offset !== false) {
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fseek($fh, $start_offset);
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}
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$signature = fread($fh, 4);
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if ($signature == $this->_zip_signature) {
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$file['version_needed'] = unpack("v", fread($fh, 2));
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$file['general_bit_flag'] = unpack("v", fread($fh, 2));
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$file['compression_method'] = unpack("v", fread($fh, 2));
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$file['lastmod_time'] = unpack("v", fread($fh, 2));
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$file['lastmod_date'] = unpack("v", fread($fh, 2));
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$file['crc-32'] = fread($fh, 4);
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$file['compressed_size'] = unpack("V", fread($fh, 4));
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$file['uncompressed_size'] = unpack("V", fread($fh, 4));
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$zip_file_length = unpack("v", fread($fh, 2));
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$extra_field_length = unpack("v", fread($fh, 2));
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$file['file_name'] = fread($fh, $zip_file_length[1]);
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$file['extra_field'] = $extra_field_length[1] ? fread($fh, $extra_field_length[1]) : '';
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$file['contents_start_offset'] = ftell($fh);
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fseek($fh, $file['compressed_size'][1], SEEK_CUR);
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$binary_mod_date = str_pad(decbin($file['lastmod_date'][1]), 16, '0', STR_PAD_LEFT);
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$binary_mod_time = str_pad(decbin($file['lastmod_time'][1]), 16, '0', STR_PAD_LEFT);
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$last_mod_year = bindec(substr($binary_mod_date, 0, 7)) + 1980;
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$last_mod_month = bindec(substr($binary_mod_date, 7, 4));
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$last_mod_day = bindec(substr($binary_mod_date, 11, 5));
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$last_mod_hour = bindec(substr($binary_mod_time, 0, 5));
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$last_mod_minute = bindec(substr($binary_mod_time, 5, 6));
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$last_mod_second = bindec(substr($binary_mod_time, 11, 5));
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return array(
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'file_name' => $file['file_name'],
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'compression_method' => $file['compression_method'][1],
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'version_needed' => $file['version_needed'][1],
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'lastmod_datetime' => mktime($last_mod_hour, $last_mod_minute, $last_mod_second, $last_mod_month, $last_mod_day, $last_mod_year),
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'crc-32' => str_pad(dechex(ord($file['crc-32'][3])), 2, '0', STR_PAD_LEFT) .
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str_pad(dechex(ord($file['crc-32'][2])), 2, '0', STR_PAD_LEFT) .
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str_pad(dechex(ord($file['crc-32'][1])), 2, '0', STR_PAD_LEFT) .
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str_pad(dechex(ord($file['crc-32'][0])), 2, '0', STR_PAD_LEFT),
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'compressed_size' => $file['compressed_size'][1],
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'uncompressed_size' => $file['uncompressed_size'][1],
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'extra_field' => $file['extra_field'],
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'general_bit_flag' => str_pad(decbin($file['general_bit_flag'][1]), 8, '0', STR_PAD_LEFT),
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'contents_start_offset' => $file['contents_start_offset']
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);
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}
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return false;
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}
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private function _extract_file($compressed_file_name, $target_file_name = false)
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{
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if ( !sizeof($this->_archive_info)) {
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return false;
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}
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$fdetails = &$this->_archive_info[$compressed_file_name];
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if ( ! isset($this->_archive_info[$compressed_file_name])) {
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return false;
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}
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if (substr($compressed_file_name, -1) == '/') {
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return false;
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}
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if ( !$fdetails['uncompressed_size']) {
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return $target_file_name ? file_put_contents($target_file_name, '') : '';
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}
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fseek($this->farc, $fdetails['contents_start_offset']);
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$ret = $this->_uncompress(
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fread($this->farc, $fdetails['compressed_size']),
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$fdetails['compression_method'],
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$fdetails['uncompressed_size'],
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$target_file_name
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);
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if ($target_file_name) {
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chmod($target_file_name, 0644);
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}
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return $ret;
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}
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private function _uncompress($content, $mode, $uncompressed_size, $target_file_name = false)
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{
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switch ($mode) {
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case 0:
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return $target_file_name ? file_put_contents($target_file_name, $content) : $content;
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case 8:
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return $target_file_name
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? file_put_contents($target_file_name, gzinflate($content, $uncompressed_size))
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: gzinflate($content, $uncompressed_size);
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case 12:
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return $target_file_name
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? file_put_contents($target_file_name, bzdecompress($content)) : bzdecompress($content);
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default:
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return false;
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}
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}
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}
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