<?php



// +----------------------------------------------------------------------

// | EcTouch [ 专注移动电商: 商创网络科技 ]

// +----------------------------------------------------------------------

// | Copyright (c) 2014 http://ectouch.cn All rights reserved.

// +----------------------------------------------------------------------

// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )

// +----------------------------------------------------------------------

// | Author: EcTouch Team <zhong@ecmoban.com> (QQ: 2880175560)

// +----------------------------------------------------------------------



class Zip {



    protected $datasec = array();

    protected $ctrl_dir = array();

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

    protected $old_offset = 0;

    protected $total_files = 0;

    protected $total_folders = 0;



    public function compress($zip_filename = 'ecTouch.zip', $dir = './', $path_replace = '') {

        if (function_exists('gzcompress')) {

            $filelist = $this->GetFileList($dir);



            if (count($filelist) > 0) {

                foreach ($filelist as $filename) {

                    if (is_file($filename)) {

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

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

                        fclose($fd);

                        $this->addFile($content, str_replace($path_replace, '', $filename));

                    }

                }

                $out = $this->file();

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

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

                fclose($fp);

                return true;

            }

        }



        return false;

    }



    public function decompress($zip_filename = 'ecTouch.zip', $dir = './') {

        $index = array(-1);

        $ok = 0;

        $zip_fp = @fopen($zip_filename, 'rb');

        if (!$zip_fp)

            return false;



        $cdir = $this->ReadCentralDir($zip_fp, $zip_filename);

        $pos_entry = $cdir['offset'];



        if (!is_array($index)) {

            $index = array($index);

        }

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

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

                return false;

        }

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

            @fseek($zip_fp, $pos_entry);

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

            $header['index'] = $i;

            $pos_entry = ftell($zip_fp);

            @rewind($zip_fp);

            fseek($zip_fp, $header['offset']);

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

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

        }

        fclose($zip_fp);

        return $stat;

    }



    private function GetFileList($dir) {

        $file = array();

        if (file_exists($dir)) {



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

                $dir .= "/";

            }





            $dh = opendir($dir);

            while ($files = readdir($dh)) {

                if (($files != ".") && ($files != "..")) {

                    if (is_dir($dir . $files)) {

                        $file = array_merge($file, $this->GetFileList($dir . $files));

                    } else

                        $file[] = $dir . $files;

                }

            }

            closedir($dh);

        }

        $file[] = '';

        return $file;

    }



    private function unix2DosTime($unixtime = 0) {

        $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);

        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);

    }



    private function addFile($data, $name, $time = 0) {

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

        $dtime = dechex($this->unix2DosTime($time));

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

                . '\x' . $dtime[4] . $dtime[5]

                . '\x' . $dtime[2] . $dtime[3]

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

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



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

        $fr .= "\x14\x00"; // ver needed to extract

        $fr .= "\x00\x00"; // gen purpose bit flag

        $fr .= "\x08\x00"; // compression method

        $fr .= $hexdtime; // last mod time and date

        // "local file header" segment

        $unc_len = strlen($data);

        $crc = crc32($data);

        $zdata = gzcompress($data);

        $c_len = strlen($zdata);

        $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug

        $fr .= pack('V', $crc); // crc32

        $fr .= pack('V', $c_len); // compressed filesize

        $fr .= pack('V', $unc_len); // uncompressed filesize

        $fr .= pack('v', strlen($name)); // length of filename

        $fr .= pack('v', 0); // extra field length

        $fr .= $name;



        // "file data" segment

        $fr .= $zdata;



        // "data descriptor" segment (optional but necessary if archive is not

        // served as file)

        $fr .= pack('V', $crc); // crc32

        $fr .= pack('V', $c_len); // compressed filesize

        $fr .= pack('V', $unc_len); // uncompressed filesize

        // add this entry to array

        $this->datasec[] = $fr;

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



        // now add to central directory record

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

        $cdrec .= "\x00\x00"; // version made by

        $cdrec .= "\x14\x00"; // version needed to extract

        $cdrec .= "\x00\x00"; // gen purpose bit flag

        $cdrec .= "\x08\x00"; // compression method

        $cdrec .= $hexdtime; // last mod time & date

        $cdrec .= pack('V', $crc); // crc32

        $cdrec .= pack('V', $c_len); // compressed filesize

        $cdrec .= pack('V', $unc_len); // uncompressed filesize

        $cdrec .= pack('v', strlen($name)); // length of filename

        $cdrec .= pack('v', 0); // extra field length

        $cdrec .= pack('v', 0); // file comment length

        $cdrec .= pack('v', 0); // disk number start

        $cdrec .= pack('v', 0); // internal file attributes

        $cdrec .= pack('V', 32); // external file attributes - 'archive' bit set



        $cdrec .= pack('V', $this->old_offset); // relative offset of local header

        $this->old_offset = $new_offset;



        $cdrec .= $name;



        $this->ctrl_dir[] = $cdrec;

    }



    private function 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";

    }



//下面是zip解压部分

    protected 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;

    }



    protected 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;

    }



    protected 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 or $bytes == 0x2e706870504b0506) {

                $pos++;

                break;

            } $pos++;

        }



        $fdata = fread($zip, 18);



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



        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;

    }



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

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



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

            $to.="/";

        if ($to == './')

            $to = '';

        $pth = explode("/", $to . $header['filename']);

        $mydir = '';

        for ($i = 0; $i < count($pth) - 1; $i++) {

            if (!$pth[$i])

                continue;

            $mydir .= $pth[$i] . "/";

            if ((!is_dir($mydir) && @mkdir($mydir, 0777)) || (($mydir == $to . $header['filename'] || ($mydir == $to && $this->total_folders == 0)) && is_dir($mydir))) {

                @chmod($mydir, 0777);

                $this->total_folders ++;

            }

        }



        if (strrchr($header['filename'], '/') == '/')

            return;



        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閑");

                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');

            }

        }



        $this->total_files ++;

        return true;

    }



}



?>