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-rw-r--r--system/libraries/Zip.php296
1 files changed, 196 insertions, 100 deletions
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
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