now = time(); } // -------------------------------------------------------------------- /** * Add Directory * * Lets you add a virtual directory into which you can place files. * * @param mixed the directory name. Can be string or array * @return void */ public function add_dir($directory) { foreach ((array)$directory as $dir) { if ( ! preg_match("|.+/$|", $dir)) { $dir .= '/'; } $dir_time = $this->_get_mod_time($dir); $this->_add_dir($dir, $dir_time['file_mtime'], $dir_time['file_mdate']); } } // -------------------------------------------------------------------- /** * Get file/directory modification time * * If this is a newly created file/dir, we will set the time to 'now' * * @param string path to file * @return array filemtime/filemdate */ protected function _get_mod_time($dir) { // filemtime() may return false, but raises an error for non-existing files $date = (file_exists($dir)) ? filemtime($dir): getdate($this->now); $time = array( 'file_mtime' => ($date['hours'] << 11) + ($date['minutes'] << 5) + $date['seconds'] / 2, 'file_mdate' => (($date['year'] - 1980) << 9) + ($date['mon'] << 5) + $date['mday'] ); return $time; } // -------------------------------------------------------------------- /** * Add Directory * * @param string the directory name * @return void */ protected function _add_dir($dir, $file_mtime, $file_mdate) { $dir = str_replace("\\", "/", $dir); $this->zipdata .= "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00" .pack('v', $file_mtime) .pack('v', $file_mdate) .pack('V', 0) // crc32 .pack('V', 0) // compressed filesize .pack('V', 0) // uncompressed filesize .pack('v', strlen($dir)) // length of pathname .pack('v', 0) // extra field length .$dir // below is "data descriptor" segment .pack('V', 0) // crc32 .pack('V', 0) // compressed filesize .pack('V', 0); // uncompressed filesize $this->directory .= "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00" .pack('v', $file_mtime) .pack('v', $file_mdate) .pack('V',0) // crc32 .pack('V',0) // compressed filesize .pack('V',0) // uncompressed filesize .pack('v', strlen($dir)) // length of pathname .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', 16) // external file attributes - 'directory' bit set .pack('V', $this->offset) // relative offset of local header .$dir; $this->offset = strlen($this->zipdata); $this->entries++; } // -------------------------------------------------------------------- /** * Add Data to Zip * * Lets you add files to the archive. If the path is included * in the filename it will be placed within a directory. Make * sure you use add_dir() first to create the folder. * * @param mixed * @param string * @return void */ public function add_data($filepath, $data = NULL) { if (is_array($filepath)) { foreach ($filepath as $path => $data) { $file_data = $this->_get_mod_time($path); $this->_add_data($path, $data, $file_data['file_mtime'], $file_data['file_mdate']); } } else { $file_data = $this->_get_mod_time($filepath); $this->_add_data($filepath, $data, $file_data['file_mtime'], $file_data['file_mdate']); } } // -------------------------------------------------------------------- /** * Add Data to Zip * * @param string the file name/path * @param string the data to be encoded * @return void */ protected function _add_data($filepath, $data, $file_mtime, $file_mdate) { $filepath = str_replace("\\", "/", $filepath); $uncompressed_size = strlen($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" .pack('v', $file_mtime) .pack('v', $file_mdate) .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" .pack('v', $file_mtime) .pack('v', $file_mdate) .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++; $this->file_num++; } // -------------------------------------------------------------------- /** * Read the contents of a file and add it to the zip * * @return bool */ public function read_file($path, $preserve_filepath = FALSE) { if ( ! file_exists($path)) { return FALSE; } if (FALSE !== ($data = file_get_contents($path))) { $name = str_replace("\\", "/", $path); if ($preserve_filepath === FALSE) { $name = preg_replace("|.*/(.+)|", "\\1", $name); } $this->add_data($name, $data); return TRUE; } return FALSE; } // ------------------------------------------------------------------------ /** * Read a directory and add it to the zip. * * This function recursively reads a folder and everything it contains (including * sub-folders) and creates a zip based on it. Whatever directory structure * is in the original file path will be recreated in the zip file. * * @param string path to source * @return bool */ public function read_dir($path, $preserve_filepath = TRUE, $root_path = NULL) { $path = rtrim($path, '/\\').DIRECTORY_SEPARATOR; if ( ! $fp = @opendir($path)) { return FALSE; } // Set the original directory root for child dir's to use as relative if ($root_path === NULL) { $root_path = dirname($path).'/'; } while (FALSE !== ($file = readdir($fp))) { if ($file[0] === '.') { continue; } if (@is_dir($path.$file)) { $this->read_dir($path.$file."/", $preserve_filepath, $root_path); } else { if (FALSE !== ($data = file_get_contents($path.$file))) { $name = str_replace("\\", "/", $path); if ($preserve_filepath === FALSE) { $name = str_replace($root_path, '', $name); } $this->add_data($name.$file, $data); } } } return TRUE; } // -------------------------------------------------------------------- /** * Get the Zip file * * @return binary string */ public function get_zip() { // Is there any data to return? if ($this->entries == 0) { return FALSE; } return $this->zipdata . $this->directory."\x50\x4b\x05\x06\x00\x00\x00\x00" . pack('v', $this->entries) // total # of entries "on this disk" . pack('v', $this->entries) // total # of entries overall . pack('V', strlen($this->directory)) // size of central dir . pack('V', strlen($this->zipdata)) // offset to start of central dir . "\x00\x00"; // .zip file comment length } // -------------------------------------------------------------------- /** * Write File to the specified directory * * Lets you write a file * * @param string the file name * @return bool */ public function archive($filepath) { if ( ! ($fp = @fopen($filepath, FOPEN_WRITE_CREATE_DESTRUCTIVE))) { return FALSE; } flock($fp, LOCK_EX); fwrite($fp, $this->get_zip()); flock($fp, LOCK_UN); fclose($fp); return TRUE; } // -------------------------------------------------------------------- /** * Download * * @param string the file name * @param string the data to be encoded * @return bool */ public function download($filename = 'backup.zip') { if ( ! preg_match("|.+?\.zip$|", $filename)) { $filename .= '.zip'; } $CI =& get_instance(); $CI->load->helper('download'); $get_zip = $this->get_zip(); $zip_content =& $get_zip; force_download($filename, $zip_content); } // -------------------------------------------------------------------- /** * Initialize Data * * Lets you clear current zip data. Useful if you need to create * multiple zips with different data. * * @return void */ public function clear_data() { $this->zipdata = ''; $this->directory = ''; $this->entries = 0; $this->file_num = 0; $this->offset = 0; return $this; } } /* End of file Zip.php */ /* Location: ./system/libraries/Zip.php */