<?php
/*
 * Build preview html
 */
// BROWSER COMPLIANT IMAGE FILES
if (ereg("image/gif", $mime) || ereg("image/jpeg", $mime) || ereg("image/bmp", $mime)) {
  $preview = "<IMG SRC='download.php?sub_dir=" . urlencode($_GET['sub_dir']) . "&file=" . urlencode($_GET['file']) . "'>";
}

// PLAYABLE MOVIE FILES
if (ereg("(^video/)", $mime)) {
  $preview =  "preview of " . $_GET['file'] . "<P>";
  $preview .= "<EMBED class='embed' SRC='download.php?sub_dir=" . urlencode($_GET['sub_dir']) . "&file=" . urlencode($_GET['file']) . "' width='300' height='300'  autoplay='false' controller='true'  loop='true'>";
}

// PLAYABLE AUDIO FILES
if (ereg("(^audio/)", $mime)) {
  $preview =  "preview of " . $_GET['file'] . "<P>";
  $preview .= "<EMBED class='embed' SRC='download.php?sub_dir=" . urlencode($_GET['sub_dir']) . "&file=" . urlencode($_GET['file']) . "' width='300' height='40'  autoplay='false' controller='true'  loop='true'>";
}

// READABLE TEXT FILES
if (ereg("^text/", $mime) || ereg("x-httpd-php", $mime) || $_GET['force_textview'] == 1) {
  $preview =  "<SPAN CLASS='fat'>Contents of " . $_GET['file'] . "</SPAN><BR>";
  $preview .= "<TEXTAREA WRAP='OFF' CLASS='view-text'>";

  // Risk HTML contamination on big files. PHP mem limit can kill proces if > 8 MB
  if ($file_obj->size < 6291456) {
    $fp = fopen($file, "r");
    $contents = fread($fp, $file_obj->size);
    $contents = htmlspecialchars($contents, ENT_QUOTES);
    $preview .= $contents;
  } else {
    $fp = fopen($file, "r");
    $contents = fread($fp, 5000000);
    $contents = htmlspecialchars($contents, ENT_QUOTES);
    $preview .= $contents;    
  }
  $preview .= "</TEXTAREA>";
}

// HEXDUMP
if ($_GET['force_hexview'] == 1) {
  $preview = "";
  $preview .= "<table border=0 width='$table_width'>";
  $preview .= "<tr><td align='left'><tt>";
  $preview .= "<b>Dec.</b>";
  $preview .= "</tt></td><td align='left'><tt>";
  $preview .= "<b>Hexadec.</b>";
  $preview .= "</tt></td><td align='left'><tt>";
  $preview .= "<b>Hexadecimal data</b>";
  $preview .= "</tt></td><td align='left'><tt>";
  $preview .= "<b>Printable (ASCII) data</b>";
  $preview .= "</tt></td></tr>";
  $preview .= "<tr><td colspan=4><hr></td></tr>";
  $icount=0;
  $handle = fopen ($file, "rb");
  if ($handle) {
    while (!feof($handle)) {
    $data=fread($handle, 16);
    $hexdata= bin2hex($data);
    $preview .= "<tr><td align=right><tt>";
    $preview .= $icount . " " . "&nbsp;"; 
    $preview .= "</tt></td><td><tt>";
    $preview .= dec2hex($icount, 8) . " " . "&nbsp;";
    $preview .= "</tt></td><td><tt>";
    for ($j=0;$j<strlen($hexdata);$j+=2){
      $preview .=  substr($hexdata,$j,2);
      $preview .= "&nbsp;";
    }
  
    $preview .=  " " . "&nbsp;";
    $preview .= "</tt></td><td><tt>";
    for ($i=0;$i<strlen($hexdata);$i+=2) {
      $preview .= htmlspecialchars(preg_replace('([^_a-zA-Z0-9\<\>\\\|\(\)\ \@\-\.])', '.', chr(hexdec(substr($hexdata,$i,2)))));
    }
    $preview .= "</tt></td></tr>";
    $icount += 16;
    }
  }
  fclose ($handle);
  $preview .= "<tr><td colspan=4><hr></td></tr>";
  $preview .= "</table><br>";
}

?>