root/trunk/plog-download.php

<?php

include(dirname(__FILE__)."/plog-load-config.php");
if (!$config["allow_dl"]) {
    // ignorance is bliss
    exit();
}

/*

Zip file creation class
makes zip files on the fly...

use the functions add_dir() and add_file() to build the zip file;
see example code below

by Eric Mueller
http://www.themepark.com

v1.1 9-20-01
- added comments to example

v1.0 2-5-01

initial version with:
- class appearance
- add_file() and file() methods
- gzcompress() output hacking
by Denis O.Philippov, webmaster@atlant.ru, http://www.atlant.ru

*/

// official ZIP file format: http://www. // pkware.com/appnote.txt

class zipfile {

    var $datasec = array();                            // array to store compressed data
    var $ctrl_dir = array();                                // central directory
    var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00"; //end of Central directory record
    var $old_offset = 0;

    function add_dir($name) {
    // adds "directory" to archive - do this before putting any files in directory!
    // $name - name of directory... like this: "path/"
    // ...then you can add files using add_file with names like "path/file.txt"

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

        $fr = "\x50\x4b\x03\x04";
        $fr .= "\x0a\x00";                                    // ver needed to extract
        $fr .= "\x00\x00";                                    // gen purpose bit flag
        $fr .= "\x00\x00";                                    // compression method
        $fr .= "\x00\x00\x00\x00";                        // last mod time and date

        $fr .= pack("V",0);                                // crc32
        $fr .= pack("V",0);                                //compressed filesize
        $fr .= pack("V",0);                                //uncompressed filesize
        $fr .= pack("v", strlen($name) );            //length of pathname
        $fr .= pack("v", 0 );                                //extra field length
        $fr .= $name;
        // end of "local file header" segment

        // no "file data" segment for path

        // "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 = $this->old_offset + strlen ($fr) ;
        //$new_offset = strlen(implode("", $this->datasec));

        // ext. file attributes mirrors MS-DOS directory attr byte, detailed
        // at http://support.microsoft.com/support/kb/articles/Q125/0/19.asp

        // now add to central record
        $cdrec = "\x50\x4b\x01\x02";
        $cdrec .="\x00\x00";                            // version made by
        $cdrec .="\x0a\x00";                            // version needed to extract
        $cdrec .="\x00\x00";                            // gen purpose bit flag
        $cdrec .="\x00\x00";                            // compression method
        $cdrec .="\x00\x00\x00\x00";                    // last mod time & date
        $cdrec .= pack("V",0);                            // crc32
        $cdrec .= pack("V",0);                            //compressed filesize
        $cdrec .= pack("V",0);                            //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
        $ext = "\x00\x00\x10\x00";
        $ext = "\xff\xff\xff\xff";
        $cdrec .= pack("V", 16 );                        //external file attributes  - 'directory' bit set

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

        $cdrec .= $name;
        // optional extra field, file comment goes here
        // save to array
        $this -> ctrl_dir[] = $cdrec;

    }

    function add_file($data, $name) {
    // adds "file" to archive
    // $data - file contents
    // $name - name of file in archive. Add path if your want

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

        $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 .= "\x00\x00\x00\x00";                        // last mod time and date

        $unc_len = strlen($data);
        $crc = crc32($data);
        $zdata = gzcompress($data);
        $zdata = substr( substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
        $c_len = strlen($zdata);
        $fr .= pack("V",$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;
        // end of "local file header" segment

        // "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 .="\x00\x00\x00\x00";                    // 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", $this -> old_offset ); //relative offset of local header
        // &n // bsp; echo "old offset is ".$this->old_offset.", new offset is $new_offset<br />";
        $this -> old_offset = $new_offset;

        $cdrec .= $name;
        // optional extra field, file comment goes here
        // save to central directory
        $this -> ctrl_dir[] = $cdrec;
    }

    // dump out file
    function file() {
        $data = implode("", $this -> datasec);
        $ctrldir = implode("", $this -> ctrl_dir);

        return
        $data.
        $ctrldir.
        $this -> eof_ctrl_dir.
        pack("v", sizeof($this -> ctrl_dir)).        // total # of entries "on this disk"
        pack("v", sizeof($this -> ctrl_dir)).        // total # of entries overall
        pack("V", strlen($ctrldir)).                    // size of central dir
        pack("V", strlen($data)).                    // offset to start of central dir
        "\x00\x00";                                        // .zip file comment length
    }
}

connect_db();

if (!isset($_REQUEST["checked"]) || (!is_array($_REQUEST["checked"]))){
    echo 'No pictures were selected.';
} else {
    create_zip($_REQUEST["checked"], $_REQUEST["dl_type"]);
}

function create_zip($checked, $level) {
    global $zipfile;

    $dir = "Plogger.".date("Y.m.d")."/";

    $zipfile = new zipfile();
    // add the subdirectory ... important!
    // $zipfile -> add_dir($dir);

    add_photos($checked, $level, $dir, $zipfile);

    $output = $zipfile -> file();

    // the next lines attempt to clear the cache, get the filesize, and force an immediate download of the zip file:
    header("Pragma: public");
    header("Expires: 0");
    header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
    header("Cache-Control: private",false);
    header("Content-type: application/octet-stream");
    header("Content-disposition: attachment; filename=plog-package-".date("Y.m.d").".zip");
    header("Content-Length: ".strlen($output));
    header('Content-Transfer-Encoding: binary');
    echo $output;

    return;
}

function add_photos($checked, $type, $dir) {
    global $zipfile;

    if ($type == "collections"){
        foreach ($checked as $cid){
            $query = "SELECT * FROM `".TABLE_PREFIX."collections` WHERE `id`='".intval($cid)."'";
            $result = run_query($query);

            while ($row = mysql_fetch_assoc($result)){
                $query = "SELECT * FROM `".TABLE_PREFIX."albums` WHERE `parent_id`='".$row["id"]."'";
                $newresult = run_query($query);

                $newchecked = array();

                while ($newrow = mysql_fetch_assoc($newresult)){
                    $newchecked[] = $newrow["id"];
                }

                $newdir = $row["name"];

                $i = 1;

                while (is_dir($newdir)){
                    $newdir = $row["name"] . " (".$i++.")";
                }

                // $zipfile -> add_dir($dir . $newdir);

                add_photos($newchecked, "collection", $dir . $newdir . "/");
            }
        }
    } else if ($type == "collection") {
        foreach ($checked as $aid){
            $query = "SELECT * FROM `".TABLE_PREFIX."albums` WHERE `id`='".intval($aid)."'";
            $result = run_query($query);

            while ($row = mysql_fetch_assoc($result)){
                $query = "SELECT * FROM `".TABLE_PREFIX."pictures` WHERE `parent_album`='".$row["id"]."'";
                $newresult = run_query($query);

                $newchecked = array();

                while ($newrow = mysql_fetch_assoc($newresult)){
                    $newchecked[] = $newrow["id"];
                }

                $newdir = $row["name"];

                $i = 1;

                while (is_dir($newdir)){
                    $newdir = $row["name"] . " (".$i++.")";
                }

                // $zipfile -> add_dir($dir . $newdir);

                add_photos($newchecked, "album", $dir . $newdir . "/");
            }
        }
    } elseif ($type == "album" || $type == "search") {
        foreach ($checked as $pid){
            $query = "SELECT * FROM `".TABLE_PREFIX."pictures` WHERE `id`='".intval($pid)."'";
            $result = run_query($query);

            while ($row = mysql_fetch_assoc($result)){
                $file_contents = file_get_contents("plog-content/images/".$row["path"], true);
                $zipfile -> add_file($file_contents, $row["path"]);

            }
        }
    }

    return;
}

?>