From 6ae57e09a1c9570a6d1f4b2410313715095a7e62 Mon Sep 17 00:00:00 2001 From: admin Date: Sun, 1 Oct 2006 07:59:45 +0000 Subject: --- system/libraries/Zip.php | 296 +++++++++++++++++++++++++++++++---------------- 1 file changed, 196 insertions(+), 100 deletions(-) (limited to 'system') diff --git a/system/libraries/Zip.php b/system/libraries/Zip.php index 1fd0e7059..aa264386d 100644 --- a/system/libraries/Zip.php +++ b/system/libraries/Zip.php @@ -21,9 +21,6 @@ * This class is based on a library aquired at Zend: * http://www.zend.com/codex.php?id=696&single=1 * - * I'm not sure this library is all that reliable, and the - * directory feature doesn't seem to work right, but it's the only - * zip compressor I'm aware of -- Rick Ellis * * @package CodeIgniter * @subpackage Libraries @@ -31,125 +28,224 @@ * @author Rick Ellis * @link http://www.codeigniter.com/user_guide/general/encryption.html */ -class Zip { - - var $zdata = array(); - var $cdir = array(); - var $offset = 0; +class Zip { + + var $zipdata = array(); + var $directory = array(); + var $offset = 0; + var $zipfile = ''; /** - * Add a Directory + * Add Directory + * + * Lets you add a virtual directory into which you can place files. * * @access public - * @param string + * @param string the directory name * @return void - */ - function add_dir($name) - { - $name =str_replace ("\\", "/", $name); - - $fd = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00" - .pack("V", 0) - .pack("V", 0) - .pack("V", 0) - .pack("v", strlen($name)) - .pack("v", 0) - .$name; - - $this->cdata[] = $fd; - - $cd = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00" - .pack("V", 0) - .pack("V", 0) - .pack("V", 0) - .pack("v", strlen ($name)) - .pack("v", 0) - .pack("v", 0) - .pack("v", 0) - .pack("v", 0) - .pack("V", 16) - .pack("V", $this->offset) - .$name; - - $this->offset = strlen(implode('', $this->cdata)); - - $this->cdir[] = $cd; - } + */ + function add_dir($dir) + { + $this->zipfile = ''; + + $dir = str_replace("\\", "/", $dir); + + $this->zipdata[] = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00" + .pack('V', 0) + .pack('V', 0) + .pack('V', 0) + .pack('v', strlen($dir)) + .pack('v', 0) + .$dir + .pack('V', 0) + .pack('V', 0) + .pack('V', 0); + + $newoffset = strlen(implode('', $this->zipdata)); + + $record = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00" + .pack('V',0) + .pack('V',0) + .pack('V',0) + .pack('v', strlen($dir)) + .pack('v', 0) + .pack('v', 0) + .pack('v', 0) + .pack('v', 0) + .pack('V', 16) + .pack('V', $this->offset) + .$dir; + + $this->offset = $newoffset; + $this->directory[] = $record; + } // -------------------------------------------------------------------- /** - * Add a File + * Add File + * + * Lets you add files to the archive. If the path is included + * in the filename it will be placed within a directory. Make + * sure you use add_dir() first to create the folder. * * @access public - * @param string + * @param string the file name + * @param string the data to be encoded * @return void */ - function add_file($data, $name) - { - $name = str_replace("\\", "/", $name); - - $u_len = strlen($data); - $crc = crc32($data); - $data = gzcompress($data); - $data = substr(substr($data, 0,strlen ($data) - 4), 2); - $c_len = strlen($data); - - $fd = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00\x00\x00\x00\x00" - .pack("V", $crc) - .pack("V", $c_len) - .pack("V", $u_len) - .pack("v", strlen($name)) - .pack("v", 0) - .$name - .$data - .pack("V", $crc) - .pack("V", $c_len) - .pack("V", $u_len); - - $this->zdata[] = $fd; - - $cd = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00\x00\x00\x00\x00" - .pack("V", $crc) - .pack("V", $c_len) - .pack("V", $u_len) - .pack("v", strlen ($name)) - .pack("v", 0) - .pack("v", 0) - .pack("v", 0) - .pack("v", 0) - .pack("V", 32 ) - .pack("V", $this->offset) - .$name; - - $this->offset = strlen(implode('', $this->zdata)); - - $this->cdir[] = $cd; - } + function add_file($filename, $data) + { + $this->zipfile = ''; + + $filename = str_replace("\\", "/", $filename); + + $oldlen = strlen($data); + $crc32 = crc32($data); + + $gzdata = gzcompress($data); + $gzdata = substr(substr($gzdata, 0, strlen($gzdata) - 4), 2); + $newlen = strlen($gzdata); + + $this->zipdata[] = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00\x00\x00\x00\x00" + .pack('V', $crc32) + .pack('V', $newlen) + .pack('V', $oldlen) + .pack('v', strlen($filename)) + .pack('v', 0) + .$filename + .$gzdata + .pack('V', $crc32) + .pack('V', $newlen) + .pack('V', $oldlen); + + $newoffset = strlen(implode("", $this->zipdata)); + + $record = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00\x00\x00\x00\x00" + .pack('V', $crc32) + .pack('V', $newlen) + .pack('V', $oldlen) + .pack('v', strlen($filename)) + .pack('v', 0) + .pack('v', 0) + .pack('v', 0) + .pack('v', 0) + .pack('V', 32) + .pack('V', $this->offset); + + $this->offset = $newoffset; + $this->directory[] = $record.$filename; + } // -------------------------------------------------------------------- /** - * Output the zip file + * Read the content of a file * * @access public + * @param string the file path * @return string */ - function output_zipfile() - { - $data = implode("", $this->zdata); - $cdir = implode("", $this->cdir); + function read_file($filepath) + { + if ( ! file_exists($filepath)) + { + return FALSE; + } + + return file_get_contents($filepath); + } + + // -------------------------------------------------------------------- - return $data - .$cdir - ."\x50\x4b\x05\x06\x00\x00\x00\x00" - .pack("v", sizeof($this->cdir)) - .pack("v", sizeof($this->cdir)) - .pack("V", strlen($cdir)) - .pack("V", strlen($data)) - ."\x00\x00"; - } + /** + * Get the Zip file + * + * @access public + * @return binary string + */ + function get_zip() + { + if ($this->zipfile != '') + { + return $this->zipfile; + } + + $data = implode('', $this->zipdata); + $dir = implode('', $this->directory); + + $this->zipfile = $data.$dir."\x50\x4b\x05\x06\x00\x00\x00\x00" + .pack('v', sizeof($this->directory)) + .pack('v', sizeof($this->directory)) + .pack('V', strlen($dir)) + .pack('V', strlen($data)) + ."\x00\x00"; + + return $this->zipfile; + } + + // -------------------------------------------------------------------- + /** + * Write File + * + * Lets you write a file + * + * @access public + * @param string the file name + * @param string the data to be encoded + * @return bool + */ + function write_file($filename, $data) + { + if ( ! ($fp = fopen($filename, "wb"))) + { + return FALSE; + } + + flock($fp, LOCK_EX); + fwrite($fp, $data); + flock($fp, LOCK_UN); + fclose($fp); + + return TRUE; + } + + // -------------------------------------------------------------------- + + /** + * Download + * + * + * @access public + * @param string the file name + * @param string the data to be encoded + * @return bool + */ + function download($filename, $data) + { + if (strstr($_SERVER['HTTP_USER_AGENT'], "MSIE")) + { + header('Content-Type: application/x-zip'); + header('Content-Disposition: inline; filename="'.$filename.'"'); + header('Expires: 0'); + header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); + header("Content-Transfer-Encoding: binary"); + header('Pragma: public'); + header("Content-Length: ".strlen($data)); + } + else + { + header('Content-Type: application/x-zip'); + header('Content-Disposition: attachment; filename="'.$filename.'"'); + header("Content-Transfer-Encoding: binary"); + header('Expires: 0'); + header('Pragma: no-cache'); + header("Content-Length: ".strlen($data)); + } + + echo $data; + } + } -// END CLASS ?> \ No newline at end of file -- cgit v1.2.3-24-g4f1b