AW: [php] wie komme ich unter Windows an dieZIPFunktionen(Lesezugriff)

[Andreas Müller]

Hallo Norbert,
ja wenn das so ist ... da gibts doch ne Lösung:
Du brauchst ja nicht die ZIP Funktionen von PHP sondern kannst auch mit
einer alternativen Implememtierung arbeiten.
Vor einiger Zeit ging einmal eine Klasse hier über die Liste die eine Zip
Datei erstellen kann. Naja das wird man ja wohl umdrehen können und diese
wieder zerlegen. Dazu schaut man sich mal kurz das Zip Format an und fertig.
Die Klasse poste ich hier nochmal:

--schnipp--------------------------------------------------

<?php

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 = 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", $this -> old_offset ); //relative offset of
local header
//        echo "old offset is ".$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;
    }

    function file() { // dump out 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
    }
}

?>
--schnapp--------------------------------------------------

So dann mal viel Spaß ... ich denke richtig ausgebaut wäre das was für PEAR.
Wer machst?

Gruß,
Andreas