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.gitignore	Edit
10_ans_depot_sequedin
10_ans_wattrelos
20_ans_ligne_touristique
50ans
LICENSE.txt	Edit
README.md	Edit
_data
about.php	Edit
action.php	Edit
admin
admin.php	Edit
collection_bus_etrangers
collection_bus_lrt
collection_metros
collection_tws_etrangers
collection_tws_lrt
collection_utilitaires
comments.php	Edit
config.php	Edit
deule_en_fete_2015
deule_en_fete_2017
doc
evenement_2012
expo_tourcoing_2016
feed.php	Edit
fete_musique_2015
galerie_15
galleries
histoire_amitram
i.php	Edit
identification.php	Edit
include
indox.php	Edit
install
install.php	Edit
language
local
lomme_halluin_2018
nbm.php	Edit
nettoyage_voies
notification.php	Edit
password.php	Edit
patrimoine_2014
patrimoine_2015
picture.php	Edit
plugins
popuphelp.php	Edit
presse
profile.php	Edit
psc.html	Edit
psc.pdf	Edit
qsearch.php	Edit
random.php	Edit
rapatriement_2012
rapatriement_4924
register.php	Edit
search.php	Edit
search_rules.php	Edit
sequedin_26_04_2015
tags.php	Edit
template-extension
tools
tracteurs_en_weppes_2013
travaux_114
travaux_182
travaux_399
travaux_4826
travaux_567
travaux_638
travaux_924
travaux_a200
travaux_divers
travaux_val
travaux_voie
travaux_wagons
upgrade.php	Edit
upgrade_feed.php	Edit
upload
videos
visite_amtuir_29_09_2018
ws.php	Edit

Editing: action.php

<?php
// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based photo gallery                                    |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008-2016 Piwigo Team                  http://piwigo.org |
// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
// +-----------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify  |
// | it under the terms of the GNU General Public License as published by  |
// | the Free Software Foundation                                          |
// |                                                                       |
// | This program is distributed in the hope that it will be useful, but   |
// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
// | General Public License for more details.                              |
// |                                                                       |
// | You should have received a copy of the GNU General Public License     |
// | along with this program; if not, write to the Free Software           |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA.                                                                  |
// +-----------------------------------------------------------------------+

define('PHPWG_ROOT_PATH','./');
session_cache_limiter('public');
include_once(PHPWG_ROOT_PATH.'include/common.inc.php');

// Check Access and exit when user status is not ok
check_status(ACCESS_GUEST);

function guess_mime_type($ext)
{
  switch ( strtolower($ext) )
  {
    case "jpe": case "jpeg":
    case "jpg": $ctype="image/jpeg"; break;
    case "png": $ctype="image/png"; break;
    case "gif": $ctype="image/gif"; break;
    case "tiff":
    case "tif": $ctype="image/tiff"; break;
    case "txt": $ctype="text/plain"; break;
    case "html":
    case "htm": $ctype="text/html"; break;
    case "xml": $ctype="text/xml"; break;
    case "pdf": $ctype="application/pdf"; break;
    case "zip": $ctype="application/zip"; break;
    case "ogg": $ctype="application/ogg"; break;
    default: $ctype="application/octet-stream";
  }
  return $ctype;
}

function do_error( $code, $str )
{
  set_status_header( $code );
  echo $str ;
  exit();
}

if ($conf['enable_formats'] and isset($_GET['format']))
{
  check_input_parameter('format', $_GET, false, PATTERN_ID);

$query = '
SELECT
    *
  FROM '.IMAGE_FORMAT_TABLE.'
  WHERE format_id = '.$_GET['format'].'
;';
  $formats = query2array($query);

if (count($formats) == 0)
  {
    do_error(400, 'Invalid request - format');
  }

$format = $formats[0];

$_GET['id'] = $format['image_id'];
  $_GET['part'] = 'f'; // "f" for "format"
}

if (!isset($_GET['id'])
    or !is_numeric($_GET['id'])
    or !isset($_GET['part'])
    or !in_array($_GET['part'], array('e','r','f') ) )
{
  do_error(400, 'Invalid request - id/part');
}

$query = '
SELECT * FROM '. IMAGES_TABLE.'
  WHERE id='.$_GET['id'].'
;';

$element_info = pwg_db_fetch_assoc(pwg_query($query));
if ( empty($element_info) )
{
  do_error(404, 'Requested id not found');
}

// special download action for admins
$is_admin_download = false;
if (is_admin() and isset($_GET['pwg_token']) and get_pwg_token() == $_GET['pwg_token'])
{
  $is_admin_download = true;
  $user['enabled_high'] = true;
}

$src_image = new SrcImage($element_info);

// $filter['visible_categories'] and $filter['visible_images']
// are not used because it's not necessary (filter <> restriction)
$query='
SELECT id
  FROM '.CATEGORIES_TABLE.'
    INNER JOIN '.IMAGE_CATEGORY_TABLE.' ON category_id = id
  WHERE image_id = '.$_GET['id'].'
'.get_sql_condition_FandF(
  array(
      'forbidden_categories' => 'category_id',
      'forbidden_images' => 'image_id',
    ),
  '    AND'
  ).'
  LIMIT 1
;';
if (!$is_admin_download and pwg_db_num_rows(pwg_query($query))<1 )
{
  do_error(401, 'Access denied');
}

include_once(PHPWG_ROOT_PATH.'include/functions_picture.inc.php');
$file='';
switch ($_GET['part'])
{
  case 'e':
    if ( $src_image->is_original() and !$user['enabled_high'] )
    {// we have a photo and the user has no access to HD
      $deriv = new DerivativeImage(IMG_XXLARGE, $src_image);
      if ( !$deriv->same_as_source() )
      {
        do_error(401, 'Access denied e');
      }
    }
    $file = get_element_path($element_info);
    break;
  case 'r':
    $file = original_to_representative( get_element_path($element_info), $element_info['representative_ext'] );
    break;
  case 'f' :
    $file = original_to_format(get_element_path($element_info), $format['ext']);
    $element_info['file'] = get_filename_wo_extension($element_info['file']).'.'.$format['ext'];
    break;
}

if ( empty($file) )
{
  do_error(404, 'Requested file not found');
}

if ($_GET['part'] == 'e') {
  pwg_log($_GET['id'], 'high');
}
else if ($_GET['part'] == 'e')
{
  pwg_log($_GET['id'], 'other');
}
else if ($_GET['part'] == 'f')
{
  pwg_log($_GET['id'], 'high', $format['format_id']);
}

$http_headers = array();

$ctype = null;
if (!url_is_remote($file))
{
  if ( !@is_readable($file) )
  {
    do_error(404, "Requested file not found - $file");
  }
  $http_headers[] = 'Content-Length: '.@filesize($file);
  if ( function_exists('mime_content_type') )
  {
    $ctype = mime_content_type($file);
  }

$gmt_mtime = gmdate('D, d M Y H:i:s', filemtime($file)).' GMT';
  $http_headers[] = 'Last-Modified: '.$gmt_mtime;

// following lines would indicate how the client should handle the cache
  /* $max_age=300;
  $http_headers[] = 'Expires: '.gmdate('D, d M Y H:i:s', time()+$max_age).' GMT';
  // HTTP/1.1 only
  $http_headers[] = 'Cache-Control: private, must-revalidate, max-age='.$max_age;*/

if ('f' != $_GET['part'] and isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) )
  {
    set_status_header(304);
    foreach ($http_headers as $header)
    {
      header( $header );
    }
    exit();
  }
}

if (!isset($ctype))
{ // give it a guess
  $ctype = guess_mime_type( get_extension($file) );
}

$http_headers[] = 'Content-Type: '.$ctype;

if (isset($_GET['download']))
{
  $http_headers[] = 'Content-Disposition: attachment; filename="'.htmlspecialchars_decode($element_info['file']).'";';
  $http_headers[] = 'Content-Transfer-Encoding: binary';
}
else
{
  $http_headers[] = 'Content-Disposition: inline; filename="'
            .basename($file).'";';
}

foreach ($http_headers as $header)
{
  header( $header );
}

// Looking at the safe_mode configuration for execution time
if (ini_get('safe_mode') == 0)
{
  @set_time_limit(0);
}

@readfile($file);