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Hallo Leute,
ich bastel gerade daran, Dateien vom Webspace in mehrere klein ZIP-Dateien zu packen. Dazu habe ich eine Class gefunden. Soweit funktioniert der Erzeugen ganz gut, allerdings lassen sich die ZIP-Dateien auf einem Windows System nicht öffnen. Habe schon daran rumgebastelt, komme aber überhaupt nicht weiter. Vielleicht hat jemand den zündenden Gedanke
ich bastel gerade daran, Dateien vom Webspace in mehrere klein ZIP-Dateien zu packen. Dazu habe ich eine Class gefunden. Soweit funktioniert der Erzeugen ganz gut, allerdings lassen sich die ZIP-Dateien auf einem Windows System nicht öffnen. Habe schon daran rumgebastelt, komme aber überhaupt nicht weiter. Vielleicht hat jemand den zündenden Gedanke
PHP-Code:
/** * EasyZIP class version 1.0 stable * replacement for class.filesplitter.php * 14 October 2004 * zip & split on the fly * Author: huda m elmatsani * Email : justhuda ## netscape ## net * * * example * create zip file * $z = new EasyZIP; * $z -> addFile("map.bmp"); * $z -> addFile("guide.pdf"); * $z -> addDir("files/test"); * $z -> zipFile("xyz.zip"); * * created splitted file * $z = new EasyZIP; * $z -> addFile("guide.pdf"); * $z -> splitFile("map.zip",1048576); * * pack and split * $z = new EasyZIP; * $z -> addFile("map.bmp"); * $z -> addFile("guide.pdf"); * $z -> splitFile("xyz.zip",1048576); * * */ //simple error message definition define(FUNCTION_NOT_FOUND,'Error: gzcompress() function is not found'); define(FILE_NOT_FOUND,'Error: file is not found'); define(DIRECTORY_NOT_FOUND,'Error: directory is not found'); class EasyZIP { var $filelist = array(); var $data_segments = array(); var $data_block; var $file_headers = array(); var $filename; var $filedata; var $old_offset = 0; var $splitted = 0; var $split_signature = ""; var $split_size = 1; var $split_offset = 0; var $disk_number = 1; function EasyZIP() { if (!@function_exists('gzcompress')) die(FUNCTION_NOT_FOUND); } function addFile($filename) { if(file_exists($filename)) { $this -> filelist[] = str_replace('\\', '/', $filename); } else { die(FILE_NOT_FOUND); } } function addDir($dirname) { if ($handle = opendir($dirname)) { while (false !== ($filename = readdir($handle))) { if ($filename != "." && $filename != "..") $this->addFile($dirname . '/' . $filename); } closedir($handle); } else { die(DIRECTORY_NOT_FOUND); } } function zipFile($zipfilename) { $zip = $this -> packFiles(); $fp = fopen($zipfilename, "w"); fwrite($fp, $zip, strlen($zip)); fclose($fp); } function splitFile($splitfilename, $chunk_size) { $this -> chunk_size = $chunk_size; $this -> splitted = 1; $this -> split_offset = 4; $this -> old_offset = $this -> split_offset; $this -> split_signature = "\x50\x4b\x07\x08"; $zip = $this -> packFiles(); $out = $this -> str_split($this -> split_signature . $zip, $chunk_size); for ($i = 0; $i < sizeof($out); $i++){ if($i < sizeof($out)-1) { $sfilename = basename ($splitfilename,".zip"); $sfilename = $sfilename . ".z" . sprintf("%02d",$i+1); } else $sfilename = $splitfilename; $fp = fopen($sfilename, "w"); fwrite($fp, $out[$i], strlen($out[$i])); fclose($fp); } } function packFiles() { foreach($this -> filelist as $k => $filename) { $this -> filename = $filename; $this -> setFileData(); $this -> setLocalFileHeader(); $this -> setDataDescriptor(); $this -> setDataSegment(); $this -> setFileHeader(); } return $this -> getDataSegments() . $this -> getCentralDirectory(); } function setFileData() { clearstatcache(); $fd = fopen ($this->filename, "rb"); $this->filedata = fread ($fd, filesize ($this->filename)); fclose ($fd); $filetime = filectime($this->filename); $this -> DOSFileTime($filetime); } function setLocalFileHeader() { $local_file_header_signature = "\x50\x4b\x03\x04";//4 bytes (0x04034b50) $this -> version_needed_to_extract = "\x14\x00"; //2 bytes $this -> general_purpose_bit_flag = "\x00\x00"; //2 bytes $this -> compression_method = "\x08\x00"; //2 bytes $this -> crc_32 = pack('V', crc32($this -> filedata));// 4 bytes //compressing data $c_data = gzcompress($this -> filedata); $this->compressed_filedata = substr(substr($c_data, 0, strlen($c_data) - 4), 2); // fix crc bug $this -> compressed_size = pack('V', strlen($this -> compressed_filedata));// 4 bytes $this -> uncompressed_size = pack('V', strlen($this -> filedata));//4 bytes $this -> filename_length = pack('v', strlen($this -> filename));// 2 bytes $this -> extra_field_length = pack('v', 0); //2 bytes $this -> local_file_header = $local_file_header_signature . $this -> version_needed_to_extract . $this -> general_purpose_bit_flag . $this -> compression_method . $this -> last_mod_file_time . $this -> last_mod_file_date . $this -> crc_32 . $this -> compressed_size . $this -> uncompressed_size . $this -> filename_length . $this -> extra_field_length . $this -> filename; } function setDataDescriptor() { $this -> data_descriptor = $this->crc_32 . //4 bytes $this -> compressed_size . //4 bytes $this -> uncompressed_size; //4 bytes } function setDataSegment() { $this -> data_segments[] = $this -> local_file_header . $this -> compressed_filedata . $this -> data_descriptor; $this -> data_block = implode('', $this -> data_segments); } function getDataSegments() { return $this -> data_block; } function setFileHeader() { $new_offset = strlen( $this -> split_signature . $this -> data_block ); $central_file_header_signature = "\x50\x4b\x01\x02";//4 bytes (0x02014b50) $version_made_by = pack('v', 0); //2 bytes $file_comment_length = pack('v', 0); //2 bytes $disk_number_start = pack('v', $this -> disk_number - 1); //2 bytes $internal_file_attributes = pack('v', 0); //2 bytes $external_file_attributes = pack('V', 32); //4 bytes $relative_offset_local_header = pack('V', $this -> old_offset); //4 bytes if($this -> splitted) { $this -> disk_number = ceil($new_offset/$this->chunk_size); $this -> old_offset = $new_offset - ($this->chunk_size * ($this -> disk_number-1)); } else $this -> old_offset = $new_offset; $this -> file_headers[] = $central_file_header_signature . $version_made_by . $this -> version_needed_to_extract . $this -> general_purpose_bit_flag . $this -> compression_method . $this -> last_mod_file_time . $this -> last_mod_file_date . $this -> crc_32 . $this -> compressed_size . $this -> uncompressed_size . $this -> filename_length . $this -> extra_field_length . $file_comment_length . $disk_number_start . $internal_file_attributes . $external_file_attributes . $relative_offset_local_header . $this -> filename; } function getCentralDirectory() { $this -> central_directory = implode('', $this -> file_headers); return $this -> central_directory . $this -> getEndCentralDirectory(); } function getEndCentralDirectory() { $zipfile_comment = "Compressed/Splitted by PHP EasyZIP"; if($this -> splitted) { $data_len = strlen($this -> split_signature . $this -> data_block . $this -> central_directory); $last_chunk_len = $data_len - floor($data_len / $this -> chunk_size) * $this -> chunk_size; $this -> old_offset = $last_chunk_len - strlen($this -> central_directory); } $end_central_dir_signature = "\x50\x4b\x05\x06";//4 bytes (0x06054b50) $number_this_disk = pack('v', $this->disk_number - 1);//2 bytes $number_disk_start = pack('v', $this->disk_number - 1);// 2 bytes $total_number_entries = pack('v', sizeof($this -> file_headers));//2 bytes $total_number_entries_central = pack('v', sizeof($this -> file_headers));//2 bytes $size_central_directory = pack('V', strlen($this -> central_directory)); //4 bytes $offset_start_central = pack('V', $this -> old_offset); //4 bytes $zipfile_comment_length = pack('v', strlen($zipfile_comment));//2 bytes return $end_central_dir_signature . $number_this_disk . $number_disk_start . $total_number_entries . $total_number_entries_central . $size_central_directory . $offset_start_central . $zipfile_comment_length . $zipfile_comment; } function DOSFileTime($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; } $dostime = (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1); $dtime = dechex($dostime); $hexdtime = '\x' . $dtime[6] . $dtime[7] . '\x' . $dtime[4] . $dtime[5]; $hexddate = '\x' . $dtime[2] . $dtime[3] . '\x' . $dtime[0] . $dtime[1]; eval('$hexdtime = "' . $hexdtime . '";'); eval('$hexddate = "' . $hexddate . '";'); $this->last_mod_file_time = $hexdtime; $this->last_mod_file_date = $hexddate; } function str_split($string, $length) { for ($i = 0; $i < strlen($string); $i += $length) { $array[] = substr($string, $i, $length); } return $array; } }
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