<?php

/**

 * Zip压缩类

 *

 * @version        $Id: zip.class.php 1 15:21 2010年7月5日Z tianya $

 * @package        DedeCMS.Libraries

 * @copyright      Copyright (c) 2007 - 2010, DesDev, Inc.

 * @license        http://help.dedecms.com/usersguide/license.html

 * @link           http://www.dedecms.com

 */

class zip

{

    var $datasec, $ctrl_dir = array();

    var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";

    var $old_offset = 0; var $dirs = Array(".");



    /**

     *  获取zip文件中的文件列表

     *

     * @access    public

     * @param     string  $zip_name  zip文件名

     * @return    array

     */

    function get_List($zip_name)

    {

        $ret = '';

        $zip = @fopen($zip_name, 'rb');

        if(!$zip)

        {

            return(0);

        }

        $centd = $this->ReadCentralDir($zip,$zip_name);

        @rewind($zip);

        @fseek($zip, $centd['offset']);

        for ($i=0; $i<$centd['entries']; $i++)

        {

            $header = $this->ReadCentralFileHeaders($zip);

            $header['index'] = $i;$info['filename'] = $header['filename'];

            $info['stored_filename'] = $header['stored_filename'];

            $info['size'] = $header['size'];$info['compressed_size']=$header['compressed_size'];

            $info['crc'] = strtoupper(dechex( $header['crc'] ));

            $info['mtime'] = $header['mtime']; $info['comment'] = $header['comment'];

            $info['folder'] = ($header['external']==0x41FF0010||$header['external']==16)?1:0;

            $info['index'] = $header['index'];$info['status'] = $header['status'];

            $ret[]=$info; unset($header);

        }

        return $ret;

    }



    /**

     *  增加文件到压缩文件

     *

     * @access    public

     * @param     string  $files 需要增加的文件列表,可以是字符串也可以是数组

     * @param     string  $compact 压缩文件名称

     * @return    array  压缩文件信息

     */

    function Add($files,$compact)

    {

        if(!is_array($files[0]))

        {

            $files=Array($files);

        }

        for($i=0;$files[$i];$i++)

        {

            $fn = $files[$i];

            if(!in_Array(dirname($fn[0]),$this->dirs))

            {

                $this->add_Dir(dirname($fn[0]));

            }

            if(basename($fn[0]))

            {

                $ret[basename($fn[0])]=$this->add_File($fn[1],$fn[0],$compact);

            }

        }

        return $ret;

    }



    /**

     *  获取文件,获取后可以让其进行下载

     *

     * @access    public

     * @return    void

     */

    function get_file()

    {

        $data = implode('', $this -> datasec);

        $ctrldir = implode('', $this -> ctrl_dir);

        return $data . $ctrldir . $this -> eof_ctrl_dir .

        pack('v', sizeof($this -> ctrl_dir)).pack('v', sizeof($this -> ctrl_dir)).

        pack('V', strlen($ctrldir)) . pack('V', strlen($data)) . "\x00\x00";

    }



    /**

     *  增加文件目录

     *

     * @access    public

     * @param     string  $name  目录名称

     * @return    void

     */

    function add_dir($name)

    {

        $name = str_replace("\\", "/", $name);

        $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";

        $fr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );

        $fr .= pack("v", 0 ).$name.pack("V", 0).pack("V", 0).pack("V", 0);

        $this -> datasec[] = $fr;

        $new_offset = strlen(implode("", $this->datasec));

        $cdrec = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";

        $cdrec .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );

        $cdrec .= pack("v", 0 ).pack("v", 0 ).pack("v", 0 ).pack("v", 0 );

        $ext = "\xff\xff\xff\xff";

        $cdrec .= pack("V", 16 ).pack("V", $this -> old_offset ).$name;

        $this -> ctrl_dir[] = $cdrec;

        $this -> old_offset = $new_offset;

        $this -> dirs[] = $name;

    }



    /**

     *  编译指定的文件为zip文件（filename可以为文件数组array、目录dir或单个文件file）

     *

     * @access    public

     * @param     string  $filename  文件名称

     * @param     string  $tozipfilename  压缩文件名称

     * @param     string  $ftype  压缩类型

     * @return    int  影响文件数

     */

    function CompileZipFile($filename, $tozipfilename,$ftype='dir')

    {

        if (@function_exists('gzcompress'))

        {

            if($ftype=='dir')

            {

                $filelist =  $this->ListDirFiles($filename);

            }

            else if($ftype=='file')

            {

                $filelist[] =  $filename;

            }

            else

            {

                $filelist =  $filename;

            }

            $i = 0;

            if(count($filelist)>0)

            {

                foreach($filelist as $filename)

                {

                    if (is_file($filename))

                    {

                        $i++;

                        $fd = fopen ($filename, "r");

                        if(filesize($filename)>0)

                        {

                            $content = fread($fd, filesize($filename));

                        }

                        else

                        {

                            $content = ' ';

                        }

                        fclose ($fd);



                        //if (is_array($dir)) $filename = basename($filename);

                        $this->add_File($content, $filename);

                    }

                }

                $out = $this->get_file();

                $fp = fopen($tozipfilename, "w");

                fwrite($fp, $out, strlen($out));

                fclose($fp);

            }

            return $i;

        }

        else

        {

            return 0;

        }

    }



    /**

     *  读取某文件夹的所有文件

     *

     * @access    public

     * @param     string  $dirname  目录名称

     * @return    mix  如果失败则返回false

     */

    function ListDirFiles($dirname)

    {

        $files = array();

        if(is_dir($dirname))

        {

            $fh = opendir($dirname);

            while (($file = readdir($fh)) !== false)

            {

                if (strcmp($file, '.')==0 || strcmp($file, '..')==0)

                {

                    continue;

                }

                $filepath = $dirname . '/' . $file;

                if ( is_dir($filepath) )

                {

                    $files = array_merge($files, $this->ListDirFiles($filepath));

                }

                else

                {

                    array_push($files, $filepath);

                }

            }

            closedir($fh);

        }

        else

        {

            $files = false;

        }

        return $files;

    }



    /**

     *  增加文件

     *

     * @access    public

     * @param     string  $data  数据

     * @param     string  $name  名称

     * @param     string  $compact  压缩

     * @return    string

     */

    function add_File($data, $name, $compact = 1)

    {

        $name     = str_replace('\\', '/', $name);

        $dtime    = dechex($this->DosTime());



        $hexdtime = '\x' . $dtime[6] . $dtime[7].'\x'.$dtime[4] . $dtime[5]

        . '\x' . $dtime[2] . $dtime[3].'\x'.$dtime[0].$dtime[1];

        eval('$hexdtime = "' . $hexdtime . '";');

        if($compact)

        $fr = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00".$hexdtime;

        else

        {

            $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00".$hexdtime;

        }

        $unc_len = strlen($data); $crc = crc32($data);

        if($compact)

        {

            $zdata = gzcompress($data); $c_len = strlen($zdata);

            $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2);

        }

        else

        {

            $zdata = $data;

        }

        $c_len=strlen($zdata);

        $fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);

        $fr .= pack('v', strlen($name)).pack('v', 0).$name.$zdata;

        $fr .= pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);

        $this -> datasec[] = $fr;

        $new_offset        = strlen(implode('', $this->datasec));

        if($compact)

        {

            $cdrec = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00";

        }

        else

        {

            $cdrec = "\x50\x4b\x01\x02\x14\x00\x0a\x00\x00\x00\x00\x00";

        }

        $cdrec .= $hexdtime.pack('V', $crc).pack('V', $c_len).pack('V', $unc_len);

        $cdrec .= pack('v', strlen($name) ).pack('v', 0 ).pack('v', 0 );

        $cdrec .= pack('v', 0 ).pack('v', 0 ).pack('V', 32 );

        $cdrec .= pack('V', $this -> old_offset );

        $this -> old_offset = $new_offset;

        $cdrec .= $name;

        $this -> ctrl_dir[] = $cdrec;

        return true;

    }



    /**

     *  返回时间

     *

     * @access    public

     * @return    int

     */

    function DosTime()

    {

        $timearray = getdate();

        if ($timearray['year'] < 1980)

        {

            $timearray['year'] = 1980; $timearray['mon'] = 1;

            $timearray['mday'] = 1; $timearray['hours'] = 0;

            $timearray['minutes'] = 0; $timearray['seconds'] = 0;

        }

        return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) |     ($timearray['mday'] << 16) | ($timearray['hours'] << 11) |

        ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);

    }



    /**

     *  解压整个压缩包

     *  直接用 Extract 会有路径问题，本函数先从列表中获得文件信息并创建好所有目录然后才运行 Extract

     *

     * @access    public

     * @param     string  $zn zip文件名称

     * @param     string  $to 解压到的目录地址

     * @return    string

     */

    function ExtractAll ( $zn, $to)

    {

        if(substr($to,-1)!="/")

        {

            $to .= "/";

        }

        $files = $this->get_List($zn);

        $cn = count($files);

        if(is_array($files))

        {

            for($i=0;$i<$cn;$i++)

            {

                if($files[$i]['folder']==1)

                {

                    @mkdir($to.$files[$i]['filename'],$GLOBALS['cfg_dir_purview']);

                    @chmod($to.$files[$i]['filename'],$GLOBALS['cfg_dir_purview']);

                }

            }

        }

        $this->Extract ($zn,$to);

    }



    /**

     *  解压单个文件

     *

     * @access    public

     * @param     string  $zn zip文件名称

     * @param     string  $to 解压到的目录地址

     * @return    string

     */

    function Extract ( $zn, $to, $index = Array(-1) )

    {

        $ok = 0; $zip = @fopen($zn,'rb');

        if(!$zip)

        {

            return(-1);

        }

        $cdir = $this->ReadCentralDir($zip,$zn);

        $pos_entry = $cdir['offset'];

        if(!is_array($index))

        {

            $index = array($index);

        }

        for($i=0; isset($index[$i]);$i++)

        {

            if(intval($index[$i])!=$index[$i]||$index[$i]>$cdir['entries'])

            {

                return(-1);

            }

        }

        for ($i=0; $i<$cdir['entries']; $i++)

        {

            @fseek($zip, $pos_entry);

            $header = $this->ReadCentralFileHeaders($zip);

            $header['index'] = $i; $pos_entry = ftell($zip);

            @rewind($zip); fseek($zip, $header['offset']);

            if(in_array("-1",$index)||in_array($i,$index))

            {

                $stat[$header['filename']]=$this->ExtractFile($header, $to, $zip);

            }



        }

        fclose($zip);

        return $stat;

    }



    function ReadFileHeader($zip)

    {

        $binary_data = fread($zip, 30);

        $data = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);

        $header['filename'] = fread($zip, $data['filename_len']);

        if ($data['extra_len'] != 0)

        {

            $header['extra'] = fread($zip, $data['extra_len']);

        }

        else

        {

            $header['extra'] = '';

        }

        $header['compression'] = $data['compression'];$header['size'] = $data['size'];

        $header['compressed_size'] = $data['compressed_size'];

        $header['crc'] = $data['crc']; $header['flag'] = $data['flag'];

        $header['mdate'] = $data['mdate'];$header['mtime'] = $data['mtime'];

        if ($header['mdate'] && $header['mtime'])

        {

            $hour=($header['mtime']&0xF800)>>11;$minute=($header['mtime']&0x07E0)>>5;

            $seconde=($header['mtime']&0x001F)*2;$year=(($header['mdate']&0xFE00)>>9)+1980;

            $month=($header['mdate']&0x01E0)>>5;$day=$header['mdate']&0x001F;

            $header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);

        }

        else

        {

            $header['mtime'] = time();

        }

        $header['stored_filename'] = $header['filename'];

        $header['status'] = "ok";

        return $header;

    }



    function ReadCentralFileHeaders($zip)

    {

        $binary_data = fread($zip, 46);

        $header = unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $binary_data);

        if ($header['filename_len'] != 0)

        {

            $header['filename'] = fread($zip,$header['filename_len']);

        }

        else

        {

            $header['filename'] = '';

        }

        if ($header['extra_len'] != 0)

        {

            $header['extra'] = fread($zip, $header['extra_len']);

        }

        else

        {

            $header['extra'] = '';

        }

        if ($header['comment_len'] != 0)

        {

            $header['comment'] = fread($zip, $header['comment_len']);

        }

        else

        {

            $header['comment'] = '';

        }

        if ($header['mdate'] && $header['mtime'])

        {

            $hour = ($header['mtime'] & 0xF800) >> 11;

            $minute = ($header['mtime'] & 0x07E0) >> 5;

            $seconde = ($header['mtime'] & 0x001F)*2;

            $year = (($header['mdate'] & 0xFE00) >> 9) + 1980;

            $month = ($header['mdate'] & 0x01E0) >> 5;

            $day = $header['mdate'] & 0x001F;

            $header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);

        }

        else

        {

            $header['mtime'] = time();

        }

        $header['stored_filename'] = $header['filename'];

        $header['status'] = 'ok';

        if (substr($header['filename'], -1) == '/')

        {

            $header['external'] = 0x41FF0010;

        }

        return $header;

    }



    function ReadCentralDir($zip,$zip_name)

    {

        $size = filesize($zip_name);

        if ($size < 277)

        {

            $maximum_size = $size;

        }

        else

        {

            $maximum_size=277;

        }

        @fseek($zip, $size-$maximum_size);

        $pos = ftell($zip); $bytes = 0x00000000;



        while ($pos < $size)

        {

            $byte = @fread($zip, 1); $bytes=($bytes << 8) | Ord($byte);

            if ($bytes == 0x504b0506)

            {

                $pos++; break;

            }

            $pos++;

        }

        $data = @unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size',fread($zip, 18));

        if ($data['comment_size'] != 0)

        {

            $centd['comment'] = fread($zip, $data['comment_size']);

        }

        else

        {

            $centd['comment'] = ''; $centd['entries'] = $data['entries'];

        }

        $centd['disk_entries'] = $data['disk_entries'];

        $centd['offset'] = $data['offset'];$centd['disk_start'] = $data['disk_start'];

        $centd['size'] = $data['size'];  $centd['disk'] = $data['disk'];

        return $centd;

    }



    function ExtractFile($header,$to,$zip)

    {

        $header = $this->readfileheader($zip);

        $header['external'] = (!isset($header['external']) ? 0 : $header['external']);

        if(substr($to,-1)!="/")

        {

            $to.="/";

        }

        if(!@is_dir($to))

        {

            @mkdir($to,$GLOBALS['cfg_dir_purview']);

        }

        if (!($header['external']==0x41FF0010)&&!($header['external']==16))

        {

            if ($header['compression']==0)

            {

                $fp = @fopen($to.$header['filename'], 'wb');

                if(!$fp)

                {

                    return(-1);

                }

                $size = $header['compressed_size'];

                while ($size != 0)

                {

                    $read_size = ($size < 2048 ? $size : 2048);

                    $buffer = fread($zip, $read_size);

                    $binary_data = pack('a'.$read_size, $buffer);

                    @fwrite($fp, $binary_data, $read_size);

                    $size -= $read_size;

                }

                fclose($fp);

                touch($to.$header['filename'], $header['mtime']);

            }

            else

            {

                $fp = @fopen($to.$header['filename'].'.gz','wb');

                if(!$fp)

                {

                    return(-1);

                }

                $binary_data = pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']),

                Chr(0x00), time(), Chr(0x00), Chr(3));

                fwrite($fp, $binary_data, 10);

                $size = $header['compressed_size'];

                while ($size != 0)

                {

                    $read_size = ($size < 1024 ? $size : 1024);

                    $buffer = fread($zip, $read_size);

                    $binary_data = pack('a'.$read_size, $buffer);

                    @fwrite($fp, $binary_data, $read_size);

                    $size -= $read_size;

                }



                $binary_data = pack('VV', $header['crc'], $header['size']);

                fwrite($fp, $binary_data,8); fclose($fp);

                $gzp = @gzopen($to.$header['filename'].'.gz','rb') or die("Cette archive est compress");

                if(!$gzp)

                {

                    return(-2);

                }

                $fp = @fopen($to.$header['filename'],'wb');

                if(!$fp)

                {

                    return(-1);

                }

                $size = $header['size'];

                while ($size != 0)

                {

                    $read_size = ($size < 2048 ? $size : 2048);

                    $buffer = gzread($gzp, $read_size);

                    $binary_data = pack('a'.$read_size, $buffer);

                    @fwrite($fp, $binary_data, $read_size);

                    $size -= $read_size;

                }

                fclose($fp); gzclose($gzp);

                touch($to.$header['filename'], $header['mtime']);

                @unlink($to.$header['filename'].'.gz');

            }

        }

        return true;

    }

}