From 135049154516ae1dbcfc58d87f4f7974af57e082 Mon Sep 17 00:00:00 2001 From: metal_gvc Date: Sat, 8 Feb 2014 13:25:58 +0200 Subject: [PATCH] Unzip Functionality #229 --- libraries/Gelato/Zip/Zip.php | 304 +++++++++++++++++++++++++++++++++++ 1 file changed, 304 insertions(+) diff --git a/libraries/Gelato/Zip/Zip.php b/libraries/Gelato/Zip/Zip.php index 9296e6f..36fb9a0 100644 --- a/libraries/Gelato/Zip/Zip.php +++ b/libraries/Gelato/Zip/Zip.php @@ -24,6 +24,12 @@ class Zip public $offset = 0; public $now; + private $_archive_info = array(); + private $_zip_signature = "\x50\x4b\x03\x04"; + private $_dir_signature = "\x50\x4b\x01\x02"; + private $_central_signature_end = "\x50\x4b\x05\x06"; + private $farc = null; + /** * Constructor */ @@ -372,4 +378,302 @@ class Zip $this->offset = 0; } + public function extract($zip_file, $target_dir = null) + { + $chmod = 0777; + $this->_archive_info = array(); + + $files = $this->_read_archive($zip_file); + + if (!$files) { + return false; + } + + $file_locations = array(); + foreach ($files as $file => $trash) { + $dirname = pathinfo($file, PATHINFO_DIRNAME); + + $folders = explode('/', $dirname); + $out_dn = $target_dir . '/' . $dirname; + + if ( !is_dir($out_dn)) { + $str = ''; + foreach ($folders as $folder) { + $str = $str ? $str . '/' . $folder : $folder; + if ( !is_dir($target_dir . '/' . $str)) { + if ( ! @mkdir($target_dir . '/' . $str)) { + return false; + } + + chmod($target_dir . '/' . $str, $chmod); + } + } + } + + if (substr($file, -1, 1) == '/') { + continue; + } + + $file_locations[] = $file_location = $target_dir . '/' . $file; + + $this->_extract_file($file, $file_location); + } + + $this->_archive_info = array(); + + return $file_locations; + } + + private function _read_archive($zip_file) + { + if (sizeof($this->_archive_info)) { + return $this->_archive_info; + } + + $fh = fopen($zip_file, 'r'); + $this->farc = &$fh; + + if ( !$fh) { + return false; + } + + if ( !$this->_read_file_list_by_eof($fh)) { + if ( !$this->_read_files_by_signatures($fh)) { + return false; + } + } + + return $this->_archive_info; + } + + private function _read_file_list_by_eof(&$fh) + { + for ($x = 0; $x < 1024; $x++) { + fseek($fh, -22 - $x, SEEK_END); + + $signature = fread($fh, 4); + + if ($signature == $this->_central_signature_end) { + $eodir['disk_number_this'] = unpack("v", fread($fh, 2)); + $eodir['disk_number'] = unpack("v", fread($fh, 2)); + $eodir['total_entries_this'] = unpack("v", fread($fh, 2)); + $eodir['total_entries'] = unpack("v", fread($fh, 2)); + $eodir['size_of_cd'] = unpack("V", fread($fh, 4)); + $eodir['offset_start_cd'] = unpack("V", fread($fh, 4)); + $zip_comment_lenght = unpack("v", fread($fh, 2)); + $eodir['zipfile_comment'] = $zip_comment_lenght[1] ? fread($fh, $zip_comment_lenght[1]) : ''; + + fseek($fh, $eodir['offset_start_cd'][1]); + $signature = fread($fh, 4); + + while ($signature == $this->_dir_signature) { + $dir['version_madeby'] = unpack("v", fread($fh, 2)); + $dir['version_needed'] = unpack("v", fread($fh, 2)); + $dir['general_bit_flag'] = unpack("v", fread($fh, 2)); + $dir['compression_method'] = unpack("v", fread($fh, 2)); + $dir['lastmod_time'] = unpack("v", fread($fh, 2)); + $dir['lastmod_date'] = unpack("v", fread($fh, 2)); + $dir['crc-32'] = fread($fh, 4); + $dir['compressed_size'] = unpack("V", fread($fh, 4)); + $dir['uncompressed_size'] = unpack("V", fread($fh, 4)); + $zip_file_length = unpack("v", fread($fh, 2)); + $extra_field_length = unpack("v", fread($fh, 2)); + $fileCommentLength = unpack("v", fread($fh, 2)); + $dir['disk_number_start'] = unpack("v", fread($fh, 2)); + $dir['internal_attributes'] = unpack("v", fread($fh, 2)); + $dir['external_attributes1'] = unpack("v", fread($fh, 2)); + $dir['external_attributes2'] = unpack("v", fread($fh, 2)); + $dir['relative_offset'] = unpack("V", fread($fh, 4)); + $dir['file_name'] = fread($fh, $zip_file_length[1]); + $dir['extra_field'] = $extra_field_length[1] ? fread($fh, $extra_field_length[1]) : ''; + $dir['file_comment'] = $fileCommentLength[1] ? fread($fh, $fileCommentLength[1]) : ''; + + $binary_mod_date = str_pad(decbin($dir['lastmod_date'][1]), 16, '0', STR_PAD_LEFT); + $binary_mod_time = str_pad(decbin($dir['lastmod_time'][1]), 16, '0', STR_PAD_LEFT); + $last_mod_year = bindec(substr($binary_mod_date, 0, 7)) + 1980; + $last_mod_month = bindec(substr($binary_mod_date, 7, 4)); + $last_mod_day = bindec(substr($binary_mod_date, 11, 5)); + $last_mod_hour = bindec(substr($binary_mod_time, 0, 5)); + $last_mod_minute = bindec(substr($binary_mod_time, 5, 6)); + $last_mod_second = bindec(substr($binary_mod_time, 11, 5)); + + $central_dir_list[$dir['file_name']] = array( + 'version_madeby' => $dir['version_madeby'][1], + 'version_needed' => $dir['version_needed'][1], + 'general_bit_flag' => str_pad(decbin($dir['general_bit_flag'][1]), 8, '0', STR_PAD_LEFT), + 'compression_method' => $dir['compression_method'][1], + 'lastmod_datetime' => mktime($last_mod_hour, $last_mod_minute, $last_mod_second, $last_mod_month, $last_mod_day, $last_mod_year), + 'crc-32' => str_pad(dechex(ord($dir['crc-32'][3])), 2, '0', STR_PAD_LEFT) . + str_pad(dechex(ord($dir['crc-32'][2])), 2, '0', STR_PAD_LEFT) . + str_pad(dechex(ord($dir['crc-32'][1])), 2, '0', STR_PAD_LEFT) . + str_pad(dechex(ord($dir['crc-32'][0])), 2, '0', STR_PAD_LEFT), + 'compressed_size' => $dir['compressed_size'][1], + 'uncompressed_size' => $dir['uncompressed_size'][1], + 'disk_number_start' => $dir['disk_number_start'][1], + 'internal_attributes' => $dir['internal_attributes'][1], + 'external_attributes1' => $dir['external_attributes1'][1], + 'external_attributes2' => $dir['external_attributes2'][1], + 'relative_offset' => $dir['relative_offset'][1], + 'file_name' => $dir['file_name'], + 'extra_field' => $dir['extra_field'], + 'file_comment' => $dir['file_comment'], + ); + + $signature = fread($fh, 4); + } + + if (isset($central_dir_list)) { + foreach ($central_dir_list as $filename => $details) { + $i = $this->_get_file_header($fh, $details['relative_offset']); + + $this->_archive_info[$filename]['file_name'] = $filename; + $this->_archive_info[$filename]['compression_method'] = $details['compression_method']; + $this->_archive_info[$filename]['version_needed'] = $details['version_needed']; + $this->_archive_info[$filename]['lastmod_datetime'] = $details['lastmod_datetime']; + $this->_archive_info[$filename]['crc-32'] = $details['crc-32']; + $this->_archive_info[$filename]['compressed_size'] = $details['compressed_size']; + $this->_archive_info[$filename]['uncompressed_size'] = $details['uncompressed_size']; + $this->_archive_info[$filename]['lastmod_datetime'] = $details['lastmod_datetime']; + $this->_archive_info[$filename]['extra_field'] = $i['extra_field']; + $this->_archive_info[$filename]['contents_start_offset'] = $i['contents_start_offset']; + } + } + + return true; + } + } + return true; + } + + private function _read_files_by_signatures(&$fh) + { + fseek($fh, 0); + + $return = false; + for (;;) { + $details = $this->_get_file_header($fh); + + if ( !$details) { + fseek($fh, 12 - 4, SEEK_CUR); + $details = $this->_get_file_header($fh); + } + + if ( !$details) { + break; + } + + $filename = $details['file_name']; + $this->_archive_info[$filename] = $details; + $return = true; + } + + return $return; + } + + private function _get_file_header(&$fh, $start_offset = FALSE) + { + if ($start_offset !== false) { + fseek($fh, $start_offset); + } + + $signature = fread($fh, 4); + + if ($signature == $this->_zip_signature) { + $file['version_needed'] = unpack("v", fread($fh, 2)); + $file['general_bit_flag'] = unpack("v", fread($fh, 2)); + $file['compression_method'] = unpack("v", fread($fh, 2)); + $file['lastmod_time'] = unpack("v", fread($fh, 2)); + $file['lastmod_date'] = unpack("v", fread($fh, 2)); + $file['crc-32'] = fread($fh, 4); + $file['compressed_size'] = unpack("V", fread($fh, 4)); + $file['uncompressed_size'] = unpack("V", fread($fh, 4)); + $zip_file_length = unpack("v", fread($fh, 2)); + $extra_field_length = unpack("v", fread($fh, 2)); + $file['file_name'] = fread($fh, $zip_file_length[1]); + $file['extra_field'] = $extra_field_length[1] ? fread($fh, $extra_field_length[1]) : ''; + $file['contents_start_offset'] = ftell($fh); + + fseek($fh, $file['compressed_size'][1], SEEK_CUR); + + $binary_mod_date = str_pad(decbin($file['lastmod_date'][1]), 16, '0', STR_PAD_LEFT); + $binary_mod_time = str_pad(decbin($file['lastmod_time'][1]), 16, '0', STR_PAD_LEFT); + + $last_mod_year = bindec(substr($binary_mod_date, 0, 7)) + 1980; + $last_mod_month = bindec(substr($binary_mod_date, 7, 4)); + $last_mod_day = bindec(substr($binary_mod_date, 11, 5)); + $last_mod_hour = bindec(substr($binary_mod_time, 0, 5)); + $last_mod_minute = bindec(substr($binary_mod_time, 5, 6)); + $last_mod_second = bindec(substr($binary_mod_time, 11, 5)); + + return array( + 'file_name' => $file['file_name'], + 'compression_method' => $file['compression_method'][1], + 'version_needed' => $file['version_needed'][1], + 'lastmod_datetime' => mktime($last_mod_hour, $last_mod_minute, $last_mod_second, $last_mod_month, $last_mod_day, $last_mod_year), + 'crc-32' => str_pad(dechex(ord($file['crc-32'][3])), 2, '0', STR_PAD_LEFT) . + str_pad(dechex(ord($file['crc-32'][2])), 2, '0', STR_PAD_LEFT) . + str_pad(dechex(ord($file['crc-32'][1])), 2, '0', STR_PAD_LEFT) . + str_pad(dechex(ord($file['crc-32'][0])), 2, '0', STR_PAD_LEFT), + 'compressed_size' => $file['compressed_size'][1], + 'uncompressed_size' => $file['uncompressed_size'][1], + 'extra_field' => $file['extra_field'], + 'general_bit_flag' => str_pad(decbin($file['general_bit_flag'][1]), 8, '0', STR_PAD_LEFT), + 'contents_start_offset' => $file['contents_start_offset'] + ); + } + + return false; + } + + private function _extract_file($compressed_file_name, $target_file_name = false) + { + if ( !sizeof($this->_archive_info)) { + return false; + } + + $fdetails = &$this->_archive_info[$compressed_file_name]; + + if ( ! isset($this->_archive_info[$compressed_file_name])) { + return false; + } + + if (substr($compressed_file_name, -1) == '/') { + return false; + } + + if ( !$fdetails['uncompressed_size']) { + return $target_file_name ? file_put_contents($target_file_name, '') : ''; + } + + fseek($this->farc, $fdetails['contents_start_offset']); + $ret = $this->_uncompress( + fread($this->farc, $fdetails['compressed_size']), + $fdetails['compression_method'], + $fdetails['uncompressed_size'], + $target_file_name + ); + + if ($target_file_name) { + chmod($target_file_name, 0644); + } + + return $ret; + } + + private function _uncompress($content, $mode, $uncompressed_size, $target_file_name = false) + { + switch ($mode) { + case 0: + return $target_file_name ? file_put_contents($target_file_name, $content) : $content; + case 8: + return $target_file_name + ? file_put_contents($target_file_name, gzinflate($content, $uncompressed_size)) + : gzinflate($content, $uncompressed_size); + case 12: + return $target_file_name + ? file_put_contents($target_file_name, bzdecompress($content)) : bzdecompress($content); + default: + return false; + } + } }