<?php
/*--------------------------------------------------
 | GZIP/ZIP ARCHIVE CLASSES
 | By Devin Doucette
 | Copyright (c) 2003 Devin Doucette
 | Email: darksnoopy@shaw.ca
 |
 | Modified by Hexagone pour NPDS Narval
 | Modified by M. PASCAL aKa EBH (plan.net@free.fr)
 | Modified by Developpeur (developpeur@npds.org)
 | Corrected by Developpeur for Sable Evolution
 +--------------------------------------------------
 | Email bugs/suggestions to darksnoopy@shaw.ca
 +--------------------------------------------------
 | This script has been created and released under
 | the GNU GPL and is free to use and redistribute
 | only if this copyright statement is not removed
 +--------------------------------------------------*/

/*------------------------------------------------------------
 | To create gzip files:
 | $example = new gzfile($cwd,$flags); // args optional
 | -current working directory
 | -flags (array):
 |  -overwrite - whether to overwrite existing files or return
 |    an error message
 |  -defaultperms - default file permissions (like chmod(),
 |    must include 0 in front of value [eg. 0777, 0644])
 +------------------------------------------------------------*/

/*------------------------------------------------------------
 | To create zip files:
 | $example = new zipfile($cwd,$flags); // args optional
 | -current working directory
 | -flags (array):
 |  -overwrite - whether to overwrite existing files or return
 |    an error message
 |  -defaultperms - default file permissions (like chmod(),
 |    must include 0 in front of value [eg. 0777, 0644])
 |  -time - timestamp to use to replace the mtime from files
 |  -recursesd[1,0] - whether or not to include subdirs
 |  -storepath[1,0] - whether or not to store relative paths
 |  -level[0-9] - compression level (0 = none, 9 = max)
 |  -comment - comment to add to the archive
 +------------------------------------------------------------*/

/*------------------------------------------------------------
 | To add files:
 | $example->addfile($data,$filename,$flags);
 | -data - file contents
 | -filename - name of file to be put in archive
 | -flags (all flags are optional)
 | -flags (tar) [array]: -same flags as tarfile()
 | -flags (gzip) [string]: -comment to add to archive
 | -flags (zip) [array] -time - last modification time
 |
 | $example->addfiles($filelist);
 | -filelist - array of file names relative to CWD
 |
 | $example->adddirectories($dirlist);
 | -dirlist - array of directory names relative to CWD
 +------------------------------------------------------------*/

/*------------------------------------------------------------
 | To output files:
 | $example->arc_getdata();
 | -returns file contents
 |
 | $example->filedownload($filename);
 | -filename - the name to give the file that is being sent
 |
 | $example->filewrite($filename,$perms); // perms optional
 | -filename - the name (including path) of the file to write
 | -perms - permissions to give the file after it is written
 +------------------------------------------------------------*/

/*------------------------------------------------------------
 | To extract files (gzip)
 | $example->extract($data);
 | -data - data to extract files from
 | -returns an array containing file attributes and contents
 |
 | $example->extractfile($filename);
 | -filename - the name (including path) of the file to use
 | -returns an array containing file attributes and contents
 |
 | Both functions will return a string containing any errors
 +------------------------------------------------------------*/

class gzfile extends archive
{
   var $gzdata = "";
   function addfile($data,$filename=null,$comment=null)
   {
      $flags = bindec("000".(!empty($comment)? "1" : "0").(!empty($filename)? "1" : "0")."000");
      $this->gzdata .= pack("C1C1C1C1VC1C1",0x1f,0x8b,8,$flags,time(),2,0xFF);
      if(!empty($filename)) { $this->gzdata .= "$filename\0"; }
      if(!empty($comment)) { $this->gzdata .= "$comment\0"; }
      $this->gzdata .= gzdeflate($data);
      $this->gzdata .= pack("VV",crc32($data),strlen($data));
   }
   function extract($data)
   {
      $id = unpack("H2id1/H2id2",substr($data,0,2));
      if($id['id1'] != "1f" || $id['id2'] != "8b") { return $this->error("Données non valide."); }
      $temp = unpack("Cflags",substr($data,2,1));
      $temp = decbin($temp['flags']);
      if($temp & 0x8) { $flags['name'] = 1; }
      if($temp & 0x4) { $flags['comment'] = 1; }
      $offset = 10;
      $filename = "";
      while(!empty($flags['name']))
      {
         $char = substr($data,$offset,1);
         $offset++;
         if($char == "\0") { break; }
         $filename .= $char;
      }
      if($filename == "") { $filename = "file"; }
      $comment = "";
      while(!empty($flags['comment']))
      {
         $char = substr($data,$offset,1);
         $offset++;
         if($char == "\0") { break; }
         $comment .= $char;
      }
      $temp = unpack("Vcrc32/Visize",substr($data,strlen($data)-8,8));
      $crc32 = $temp['crc32'];
      $isize = $temp['isize'];
      $data = gzinflate(substr($data,$offset,strlen($data)-8-$offset));
      if($crc32 != crc32($data)) { return $this->error("Erreur de contrôle"); }
      return array('filename'=>$filename,'comment'=>$comment,'size'=>$isize,'data'=>$data);
   }
   function arc_getdata()
   {
      return $this->gzdata;
   }
   function filedownload($filename)
   {
      @header("Content-Type: application/x-gzip; name=\"$filename\"");
      @header("Content-Disposition: attachment; filename=\"$filename\"");
      @header("Pragma: no-cache");
      @header("Expires: 0");
      print($this->arc_getdata());
   }
}
class zipfile extends archive
{
   var $cwd = "./";
   var $comment = "";
   var $level = 9;
   var $offset = 0;
   var $recursesd = 1;
   var $storepath = 1;
   var $replacetime = 0;
   var $central = array();
   var $zipdata = array();
   function zipfile($cwd="./",$flags=array())
   {
      $this->cwd = $cwd;
      if(isset($flags['time'])) { $this->replacetime = $flags['time']; }
      if(isset($flags['recursesd'])) { $this->recursesd = $flags['recursesd']; }
      if(isset($flags['storepath'])) { $this->storepath = $flags['storepath']; }
      if(isset($flags['level'])) { $this->level = $flags['level']; }
      if(isset($flags['comment'])) { $this->comment = $flags['comment']; }
      $this->archive($flags);
   }
   function addfile($data,$filename,$flags=array())
   {
      if($this->storepath != 1) { $filename = strstr($filename,"/")? substr($filename,strrpos($filename,"/")+1) : $filename; }
      else { $filename = preg_replace("/^(\.{1,2}(\/|\\\))+/","",$filename); }
      $mtime = !empty($this->replacetime)? getdate($this->replacetime) : (isset($flags['time'])? getdate($flags['time']) : getdate());
      $mtime = preg_replace("/(..){1}(..){1}(..){1}(..){1}/","\\x\\4\\x\\3\\x\\2\\x\\1",dechex(($mtime['year']-1980<<25)|($mtime['mon']<<21)|($mtime['mday']<<16)|($mtime['hours']<<11)|($mtime['minutes']<<5)|($mtime['seconds']>>1)));
      eval('$mtime = "'.$mtime.'";');
      $crc32 = crc32($data);
      $normlength = strlen($data);
      $data = gzcompress($data,$this->level);
      $data = substr($data,2,strlen($data)-6);
      $complength = strlen($data);
      $this->zipdata[] = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00".$mtime.pack("VVVvv",$crc32,$complength,$normlength,strlen($filename),0x00).$filename.$data.pack("VVV",$crc32,$complength,$normlength);
      $this->central[] = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00".$mtime.pack("VVVvvvvvVV",$crc32,$complength,$normlength,strlen($filename),0x00,0x00,0x00,0x00,0x0000,$this->offset).$filename;
      $this->offset = strlen(implode("",$this->zipdata));
   }
   function addfiles($filelist)
   {
      $pwd = getcwd();
      @chdir($this->cwd);
      foreach($filelist as $current)
      {
         if(!@file_exists($current)) { continue; }
         $stat = stat($current);
         if($fp = @fopen($current,"rb"))
         {
            if ($stat[7]>0)
               $data = fread($fp,$stat[7]);
            fclose($fp);
         }
         else
         {
            $data = "";
         }
         $flags = array('time'=>$stat[9]);
         $this->addfile($data,$current,$flags);
      }
      @chdir($pwd);
   }
   function arc_getdata()
   {
      $central = implode("",$this->central);
      $zipdata = implode("",$this->zipdata);
      return $zipdata.$central."\x50\x4b\x05\x06\x00\x00\x00\x00".pack("vvVVv",sizeof($this->central),sizeof($this->central),strlen($central),strlen($zipdata),strlen($this->comment)).$this->comment;
   }
   function filedownload($filename)
   {
      @header("Content-Type: application/zip; name=\"$filename\"");
      @header("Content-Disposition: attachment; filename=\"$filename\"");
      @header("Pragma: no-cache");
      @header("Expires: 0");
      print($this->arc_getdata());
   }
}
class archive
{
   var $overwrite = 0;
   var $defaultperms   = 0644;
   function archive($flags=array())
   {
      if(isset($flags['overwrite'])) { $this->overwrite = $flags['overwrite']; }
      if(isset($flags['defaultperms'])) { $this->defaultperms = $flags['defaultperms']; }
   }
   function adddirectories($dirlist)
   {
      $pwd = getcwd();
      @chdir($this->cwd);
      $filelist = array();
      foreach($dirlist as $current)
      {
         if(@is_dir($current))
         {
            $temp = $this->parsedirectories($current);
            foreach($temp as $filename) { $filelist[] = $filename; }
         }
         elseif(@file_exists($current))
         {
            $filelist[] = $current;
         }
      }
      @chdir($pwd);
      $this->addfiles($filelist);
   }
   function parsedirectories($dirname)
   {
      $filelist = array();
      $dir = @opendir($dirname);
      while(false!==($file = readdir($dir)))
      {
         if($file == "." || $file == ".." || $file == "default.html" || $file == "index.html")
         {
            continue;
         }
         elseif(@is_dir($dirname."/".$file))
         {
            if($this->recursesd != 1) { continue; }
            $temp = $this->parsedirectories($dirname."/".$file);
            foreach($temp as $file2)
            {
               $filelist[] = $file2;
            }
         }
         elseif(@file_exists($dirname."/".$file))
         {
            $filelist[] = $dirname."/".$file;
         }
      }
      @closedir($dir);
      return $filelist;
   }
   function filewrite($filename,$perms=null)
   {
      if($this->overwrite != 1 && @file_exists($filename)) { return $this->error("Le fichier $filename existe déjà."); }
      if(@file_exists($filename)) { @unlink($filename); }
      $fp = @fopen($filename,"wb");
      if(!fwrite($fp,$this->arc_getdata()))
      {
         return $this->error("Impossible d'écrire les données dans le fichier $filename.");
      }
      @fclose($fp);
      if(!isset($perms))
      {
         $perms = $this->defaultperms;
      }
      @chmod($filename,$perms);
   }
   function extractfile($filename)
   {
      if($fp = @fopen($filename,"rb"))
      {
         if (filesize($filename)>0)
            return $this->extract(fread($fp,filesize($filename)));
         else
            return $this->error("Fichier $filename vide.");
         @fclose($fp);
      }
      else
      {
         return $this->error("Impossible d'ouvrir le fichier $filename.");
      }
   }
   function error($error)
   {
      $this->errors[] = $error;
      return 0;
   }
}

#autodoc get_os() : retourne true si l'OS de la station cliente est Windows sinon false
function get_os() {
   $client = getenv("HTTP_USER_AGENT");
   if (preg_match('#(\(|; )(Win)#',$client, $regs)) {
      if ($regs[2]=="Win") {
         $MSos = true;
      } else {
         $MSos = false;
      }
   } else {
      $MSos=false;
   }
   return ($MSos);
}

#autodoc send_file($line,$filename,$extension,$MSos) : compresse et t&eacute;l&eacute;charge un fichier / $line : le flux, $filename et $extension le fichier, $MSos (voir fonction get_os)
function send_file($line,$filename,$extension,$MSos) {
   $compressed = false;
   if (file_exists("lib/archive.php")) {
      if (function_exists("gzcompress")) {
         $compressed = true;
      }
   }
   if ($compressed) {
      if ($MSos) {
          $arc = new zipfile();
          $filez = $filename.".zip";
      } else {
          $arc = new gzfile();
          $filez = $filename.".gz";
      }
      $arc->addfile($line, $filename.".".$extension, "");
      $arc->arc_getdata();
      $arc->filedownload($filez);
   } else {
      if ($MSos) {
         header("Content-Type: application/octetstream");
      } else {
         header("Content-Type: application/octet-stream");
      }
      header("Content-Disposition: attachment; filename=\"$filename."."$extension\"");
      header("Pragma: no-cache");
      header("Expires: 0");
      echo $line;
   }
}

#autodoc send_tofile($line,$repertoire,$filename,$extension,$MSos) : compresse et enregistre un fichier / $line : le flux, $repertoire $filename et $extension le fichier, $MSos (voir fonction get_os)
function send_tofile($line,$repertoire,$filename,$extension,$MSos) {
   $compressed = false;
   if (file_exists("lib/archive.php")) {
      if (function_exists("gzcompress")) {
         $compressed = true;
      }
   }
   if ($compressed) {
      if ($MSos) {
         $arc = new zipfile();
         $filez = $filename.".zip";
      } else {
         $arc = new gzfile();
         $filez = $filename.".gz";
      }

      $arc->addfile($line, $filename.".".$extension, "");
      $arc->arc_getdata();
      if (file_exists($repertoire."/".$filez)) unlink($repertoire."/".$filez);
         $arc->filewrite($repertoire."/".$filez,$perms=null);
   } else {
      if ($MSos) {
         header("Content-Type: application/octetstream");
      } else {
         header("Content-Type: application/octet-stream");
      }
      header("Content-Disposition: attachment; filename=\"$filename."."$extension\"");
      header("Pragma: no-cache");
      header("Expires: 0");
      echo $line;
   }
}
?>