#!/usr/bin/php -q
<?php
 /***************************************************************************
													 bin/phpzip.php
															-------------------
		begin                : December 22 2005

  For license information see doc/license.txt

	***************************************************************************/

 /***************************************************************************
		
		Wrapper for unix-utilities zip, gzip and bz2
		
	***************************************************************************/

	$basedir = '/path/to/htdocs/download/zip/';

  $zipper['zip'] = 'nice --adjustment=19 zip -j -q -1 {dst} {src}';
  $zipper['gzip'] = 'nice --adjustment=19 gzip -1 -c {src} > {dst}';
  $zipper['bzip2'] = 'nice --adjustment=19 bzip2 -1 -c {src} > {dst}';

  if ($argv[1] == '--help')
	{
    echo $argv[0] . " --type=<ziptype> --src=<source> --dst=<destination>
--type   can be zip, gzip or bzip2
--src    relative* path to source file
--dst    relative* path to destination file

*relative to $basedir
";
    exit;
  }

  if ((substr($argv[1], 0, 7) != '--type=') || (substr($argv[2], 0, 6) != '--src=') || (substr($argv[3], 0, 6) != '--dst='))
    die("wrong paramter\nuse " . $argv[0] . " --help\n");

  if (isset($argv[4]))
    die("wrong paramter\nuse " . $argv[0] . " --help\n");

  $type = substr($argv[1], 7);
  $src = substr($argv[2], 6);
  $dst = substr($argv[3], 6);

	if (!isset($zipper[$type]))
    die("invaild zip type\nuse " . $argv[0] . " --help\n");

  if (checkpath($src) == false)
    die("invaild src\nuse " . $argv[0] . " --help\n");

  if (checkpath($dst) == false)
    die("invaild dst\nuse " . $argv[0] . " --help\n");

	$src = $basedir . $src;
	$dst = $basedir . $dst;

  if (!file_exists($src))
    die("error: source not exist\nuse " . $argv[0] . " --help\n");

  if (file_exists($dst))
    die("error: destination already exists\nuse " . $argv[0] . " --help\n");

  $cmd = $zipper[$type];
  $cmd = str_replace('{src}', escapeshellcmd($src), $cmd);
  $cmd = str_replace('{dst}', escapeshellcmd($dst), $cmd);
  
	system($cmd);

function checkpath($path)
{
	$parts = explode('/', $path);

  if ($parts[0] == '')
		return false;

  for ($i = 0; $i < count($parts); $i++)
  {
    if (($parts[$i] == '..') || ($parts[$i] == '.'))
			return false;

		if (!preg_match('/^[a-zA-Z0-9.-_]{1,}/', $parts[$i]))
			return false;
  }

  return true;
}
?>