', $close = '
') { return $open . implode($close . $open, $this->error) . $close; } // -------------------------------------------------------------------- /** * Show debug messages * * @param string $open * @param string $close * @return string */ public function debug_string($open = '', $close = '
') { return $open . implode($close . $open, $this->info) . $close; } // -------------------------------------------------------------------- /** * Save errors * * @param $string */ function set_error($string) { $this->error[] = $string; } // -------------------------------------------------------------------- /** * Save debug data * * @param $string */ function set_debug($string) { $this->info[] = $string; } // -------------------------------------------------------------------- /** * List all files in archive. * * @param bool $stop_on_file * @return array * @throws \FuelException */ private function _list_files($stop_on_file = false) { if (sizeof($this->compressed_list)) { $this->set_debug('Returning already loaded file list.'); return $this->compressed_list; } // Open file, and set file handler $fh = fopen($this->_zip_file, 'r'); $this->fh = &$fh; if ( ! $fh) { throw new \FuelException('Failed to load file: ' . $this->_zip_file); } $this->set_debug('Loading list from "End of Central Dir" index list...'); if ( ! $this->_load_file_list_by_eof($fh, $stop_on_file)) { $this->set_debug('Failed! Trying to load list looking for signatures...'); if ( ! $this->_load_files_by_signatures($fh, $stop_on_file)) { $this->set_debug('Failed! Could not find any valid header.'); throw new \FuelException('ZIP File is corrupted or empty'); } } return $this->compressed_list; } // -------------------------------------------------------------------- /** * Unzip file in archive. * * @param string $compressed_file_name * @param string $target_file_name * @return int|string|bool * @throws \FuelException */ private function _extract_file($compressed_file_name, $target_file_name = false) { if ( ! sizeof($this->compressed_list)) { $this->set_debug('Trying to unzip before loading file list... Loading it!'); $this->_list_files(false, $compressed_file_name); } $fdetails = &$this->compressed_list[$compressed_file_name]; if ( ! isset($this->compressed_list[$compressed_file_name])) { throw new \FuelException('File "' . $compressed_file_name . '" is not compressed in the zip.'); } if (substr($compressed_file_name, -1) == '/') { throw new \FuelException('Trying to unzip a folder name "' . $compressed_file_name . '".'); } if ( ! $fdetails['uncompressed_size']) { $this->set_debug('File "' . $compressed_file_name . '" is empty.'); return $target_file_name ? file_put_contents($target_file_name, '') : ''; } fseek($this->fh, $fdetails['contents_start_offset']); $ret = $this->_uncompress( fread($this->fh, $fdetails['compressed_size']), $fdetails['compression_method'], $fdetails['uncompressed_size'], $target_file_name ); if ($this->apply_chmod AND $target_file_name) { chmod($target_file_name, 0644); } return $ret; } // -------------------------------------------------------------------- /** * Free the file resource. */ public function close() { // Free the file resource if ($this->fh) { fclose($this->fh); } } // -------------------------------------------------------------------- /** * Free the file resource Automatic destroy. */ public function __destroy() { $this->close(); } // -------------------------------------------------------------------- /** * Uncompress file. And save it to the targetFile. * * @param mixed $content * @param int $mode * @param int $uncompressed_size * @param string $target_file_name * @return int|string|bool * @throws \FuelException */ private function _uncompress($content, $mode, $uncompressed_size, $target_file_name = false) { switch ($mode) { case 0: return $target_file_name ? file_put_contents($target_file_name, $content) : $content; case 1: throw new \FuelException('Shrunk mode is not supported... yet?'); case 2: case 3: case 4: case 5: throw new \FuelException('Compression factor ' . ($mode - 1) . ' is not supported... yet?'); case 6: throw new \FuelException('Implode is not supported... yet?'); case 7: throw new \FuelException('Tokenizing compression algorithm is not supported... yet?'); case 8: // Deflate return $target_file_name ? file_put_contents($target_file_name, gzinflate($content, $uncompressed_size)) : gzinflate($content, $uncompressed_size); case 9: throw new \FuelException('Enhanced Deflating is not supported... yet?'); case 10: throw new \FuelException('PKWARE Date Compression Library Impoloding is not supported... yet?'); case 12: // Bzip2 return $target_file_name ? file_put_contents($target_file_name, bzdecompress($content)) : bzdecompress($content); case 18: throw new \FuelException('IBM TERSE is not supported... yet?'); default: throw new \FuelException('Unknown uncompress method: $mode'); } } private function _load_file_list_by_eof(&$fh, $stop_on_file = false) { // Check if there's a valid Central Dir signature. // Let's consider a file comment smaller than 1024 characters... // Actually, it length can be 65536.. But we're not going to support it. for ($x = 0; $x < 1024; $x++) { fseek($fh, -22 - $x, SEEK_END); $signature = fread($fh, 4); if ($signature == $this->central_signature_end) { // If found EOF Central Dir $eodir['disk_number_this'] = unpack("v", fread($fh, 2)); // number of this disk $eodir['disk_number'] = unpack("v", fread($fh, 2)); // number of the disk with the start of the central directory $eodir['total_entries_this'] = unpack("v", fread($fh, 2)); // total number of entries in the central dir on this disk $eodir['total_entries'] = unpack("v", fread($fh, 2)); // total number of entries in $eodir['size_of_cd'] = unpack("V", fread($fh, 4)); // size of the central directory $eodir['offset_start_cd'] = unpack("V", fread($fh, 4)); // offset of start of central directory with respect to the starting disk number $zip_comment_lenght = unpack("v", fread($fh, 2)); // zipfile comment length $eodir['zipfile_comment'] = $zip_comment_lenght[1] ? fread($fh, $zip_comment_lenght[1]) : ''; // zipfile comment $this->end_of_central = array( 'disk_number_this' => $eodir['disk_number_this'][1], 'disk_number' => $eodir['disk_number'][1], 'total_entries_this' => $eodir['total_entries_this'][1], 'total_entries' => $eodir['total_entries'][1], 'size_of_cd' => $eodir['size_of_cd'][1], 'offset_start_cd' => $eodir['offset_start_cd'][1], 'zipfile_comment' => $eodir['zipfile_comment'], ); // Then, load file list fseek($fh, $this->end_of_central['offset_start_cd']); $signature = fread($fh, 4); while ($signature == $this->dir_signature) { $dir['version_madeby'] = unpack("v", fread($fh, 2)); // version made by $dir['version_needed'] = unpack("v", fread($fh, 2)); // version needed to extract $dir['general_bit_flag'] = unpack("v", fread($fh, 2)); // general purpose bit flag $dir['compression_method'] = unpack("v", fread($fh, 2)); // compression method $dir['lastmod_time'] = unpack("v", fread($fh, 2)); // last mod file time $dir['lastmod_date'] = unpack("v", fread($fh, 2)); // last mod file date $dir['crc-32'] = fread($fh, 4); // crc-32 $dir['compressed_size'] = unpack("V", fread($fh, 4)); // compressed size $dir['uncompressed_size'] = unpack("V", fread($fh, 4)); // uncompressed size $zip_file_length = unpack("v", fread($fh, 2)); // filename length $extra_field_length = unpack("v", fread($fh, 2)); // extra field length $fileCommentLength = unpack("v", fread($fh, 2)); // file comment length $dir['disk_number_start'] = unpack("v", fread($fh, 2)); // disk number start $dir['internal_attributes'] = unpack("v", fread($fh, 2)); // internal file attributes-byte1 $dir['external_attributes1'] = unpack("v", fread($fh, 2)); // external file attributes-byte2 $dir['external_attributes2'] = unpack("v", fread($fh, 2)); // external file attributes $dir['relative_offset'] = unpack("V", fread($fh, 4)); // relative offset of local header $dir['file_name'] = fread($fh, $zip_file_length[1]); // filename $dir['extra_field'] = $extra_field_length[1] ? fread($fh, $extra_field_length[1]) : ''; // extra field $dir['file_comment'] = $fileCommentLength[1] ? fread($fh, $fileCommentLength[1]) : ''; // file comment // Convert the date and time, from MS-DOS format to UNIX Timestamp $binary_mod_date = str_pad(decbin($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)); $this->central_dir_list[$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 loaded centralDirs, then try to identify the offsetPosition of the compressed data. if ($this->central_dir_list) { foreach ($this->central_dir_list as $filename => $details) { $i = $this->_get_file_header($fh, $details['relative_offset']); $this->compressed_list[$filename]['file_name'] = $filename; $this->compressed_list[$filename]['compression_method'] = $details['compression_method']; $this->compressed_list[$filename]['version_needed'] = $details['version_needed']; $this->compressed_list[$filename]['lastmod_datetime'] = $details['lastmod_datetime']; $this->compressed_list[$filename]['crc-32'] = $details['crc-32']; $this->compressed_list[$filename]['compressed_size'] = $details['compressed_size']; $this->compressed_list[$filename]['uncompressed_size'] = $details['uncompressed_size']; $this->compressed_list[$filename]['lastmod_datetime'] = $details['lastmod_datetime']; $this->compressed_list[$filename]['extra_field'] = $i['extra_field']; $this->compressed_list[$filename]['contents_start_offset'] = $i['contents_start_offset']; if (strtolower($stop_on_file) == strtolower($filename)) { break; } } } return TRUE; } } return false; } private function _load_files_by_signatures(&$fh, $stop_on_file = false) { fseek($fh, 0); $return = false; for (;;) { $details = $this->_get_file_header($fh); if ( ! $details) { $this->set_debug('Invalid signature. Trying to verify if is old style Data Descriptor...'); fseek($fh, 12 - 4, SEEK_CUR); // 12: Data descriptor - 4: Signature (that will be read again) $details = $this->_get_file_header($fh); } if ( ! $details) { $this->set_debug('Still invalid signature. Probably reached the end of the file.'); break; } $filename = $details['file_name']; $this->compressed_list[$filename] = $details; $return = true; if (strtolower($stop_on_file) == strtolower($filename)) { break; } } 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) { // Get information about the zipped file $file['version_needed'] = unpack("v", fread($fh, 2)); // version needed to extract $file['general_bit_flag'] = unpack("v", fread($fh, 2)); // general purpose bit flag $file['compression_method'] = unpack("v", fread($fh, 2)); // compression method $file['lastmod_time'] = unpack("v", fread($fh, 2)); // last mod file time $file['lastmod_date'] = unpack("v", fread($fh, 2)); // last mod file date $file['crc-32'] = fread($fh, 4); // crc-32 $file['compressed_size'] = unpack("V", fread($fh, 4)); // compressed size $file['uncompressed_size'] = unpack("V", fread($fh, 4)); // uncompressed size $zip_file_length = unpack("v", fread($fh, 2)); // filename length $extra_field_length = unpack("v", fread($fh, 2)); // extra field length $file['file_name'] = fread($fh, $zip_file_length[1]); // filename $file['extra_field'] = $extra_field_length[1] ? fread($fh, $extra_field_length[1]) : ''; // extra field $file['contents_start_offset'] = ftell($fh); // Bypass the whole compressed contents, and look for the next file fseek($fh, $file['compressed_size'][1], SEEK_CUR); // Convert the date and time, from MS-DOS format to UNIX Timestamp $binary_mod_date = str_pad(decbin($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)); // Mount file table $i = 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 $i; } return false; } }