[dokuwiki] Re: ZipLib
- From: Danjer <Danjer@xxxxxxxxxxxx>
- To: dokuwiki@xxxxxxxxxxxxx
- Date: Mon, 10 Dec 2007 12:24:08 +0100
Hi all,
This is a patch for ZipLib.class.php to add the ability to read a file
in a zip without write it.
Best regards,
Danjer
Andreas Gohr wrote:
Danjer writes:
Hi all,
Is it possible to add a function in ZibLib.class.php to extract a
file directly in a string ?
Actually with the ZibLib class it's not possible to read a file in a
zip file without write it on disk before.
$zip = new ZipLib;
$unzipdata1 = $zip->ExtractStr( $zn, 0);
$unzipdata2 = $zip->ExtractStr( $zn, 1);
Feel free to send a patch ;-)
Andi
--- ./site/dokutest/dokuwiki-2007-06-26b/inc/ZipLib.class.php 2007-06-26
20:27:15.000000000 +0200
+++ /home/danjer/ZipLib.class.php 2007-12-10 12:12:12.000000000 +0100
@@ -349,5 +349,91 @@
return ap_mkdir($d);
}
//--CS end
+
+
+ function ExtractStr($zn, $name) {
+ $ok = 0;
+ $zip = @fopen($zn,'rb');
+ if(!$zip) return(NULL);
+ $cdir = $this->ReadCentralDir($zip,$zn);
+ $pos_entry = $cdir['offset'];
+
+ for ($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, $header['offset']);
+ if ($name == $header['stored_filename'] || $name == $header['filename']) {
+ $str = $this->ExtractStrFile($header, $zip);
+ fclose($zip);
+ return $str;
+ }
+
+ }
+ fclose($zip);
+ return null;
+ }
+
+ function ExtractStrFile($header,$zip) {
+ $hdr = $this->readfileheader($zip);
+ $binary_data = '';
+ if (!($header['external']==0x41FF0010) && !($header['external']==16))
+ {
+ if ($header['compression']==0)
+ {
+ while ($size != 0)
+ {
+ $read_size = ($size < 2048 ? $size : 2048);
+ $buffer = fread($zip, $read_size);
+ $binary_data .= pack('a'.$read_size, $buffer);
+ $size -= $read_size;
+ }
+ return $binary_data;
+ } else {
+ $size = $header['compressed_size'];
+ if ($size == 0) {
+ return '';
+ }
+ //Just in case
+ if ($size > ($this->_ret_bytes(ini_get('memory_limit'))/2)) {
+ die("Compressed file is to huge to be uncompress in memory.");
+ }
+ while ($size != 0)
+ {
+ $read_size = ($size < 2048 ? $size : 2048);
+ $buffer = fread($zip, $read_size);
+ $binary_data .= pack('a'.$read_size, $buffer);
+ $size -= $read_size;
+ }
+ $str = gzinflate($binary_data, $header['size']);
+ if ($header['crc'] == crc32($str)) {
+ return $str;
+ } else {
+ die("Crc Error");
+ }
+ }
+ }
+ return NULL;
+ }
+
+ function _ret_bytes($val) {
+ $val = trim($val);
+ $last = $val{strlen($val)-1};
+ switch($last) {
+ case 'k':
+ case 'K':
+ return (int) $val * 1024;
+ break;
+ case 'm':
+ case 'M':
+ return (int) $val * 1048576;
+ break;
+ default:
+ return $val;
+ }
+ }
}
Other related posts:
