document.php

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<?php
/* Copyright (C) 2004-2007 Rodolphe Quiedeville <rodolphe@quiedeville.org>
 * Copyright (C) 2004-2013 Laurent Destailleur  <eldy@users.sourceforge.net>
 * Copyright (C) 2005      Simon Tosser         <simon@kornog-computing.com>
 * Copyright (C) 2005-2012 Regis Houssin        <regis.houssin@inodbox.com>
 * Copyright (C) 2010    Pierre Morin         <pierre.morin@auguria.net>
 * Copyright (C) 2010    Juanjo Menent        <jmenent@2byte.es>
 *
 * 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; either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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, see <https://www.gnu.org/licenses/>.
 * or see https://www.gnu.org/
 */

//if (! defined('NOREQUIREUSER')) define('NOREQUIREUSER','1');  // Not disabled cause need to load personalized language
//if (! defined('NOREQUIREDB'))   define('NOREQUIREDB','1');    // Not disabled cause need to load personalized language
if (!defined('NOTOKENRENEWAL')) define('NOTOKENRENEWAL', '1');
if (!defined('NOREQUIREMENU'))    define('NOREQUIREMENU', '1');
if (!defined('NOREQUIREHTML'))    define('NOREQUIREHTML', '1');
if (!defined('NOREQUIREAJAX'))    define('NOREQUIREAJAX', '1');

// For direct external download link, we don't need to load/check we are into a login session
if (isset($_GET["hashp"]) && !defined("NOLOGIN"))
{
  if (!defined("NOLOGIN"))    define("NOLOGIN", 1);
  if (!defined("NOCSRFCHECK"))  define("NOCSRFCHECK", 1); // We accept to go on this page from external web site.
  if (!defined("NOIPCHECK"))    define("NOIPCHECK", 1); // Do not check IP defined into conf $dolibarr_main_restrict_ip
}
// Some value of modulepart can be used to get resources that are public so no login are required.
if ((isset($_GET["modulepart"]) && $_GET["modulepart"] == 'medias'))
{
  if (!defined("NOLOGIN"))    define("NOLOGIN", 1);
  if (!defined("NOCSRFCHECK"))  define("NOCSRFCHECK", 1); // We accept to go on this page from external web site.
  if (!defined("NOIPCHECK"))    define("NOIPCHECK", 1); // Do not check IP defined into conf $dolibarr_main_restrict_ip
}

function llxHeader()
{
}
function llxFooter()
{
}

require 'main.inc.php'; // Load $user and permissions
require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
require_once DOL_DOCUMENT_ROOT.'/core/lib/images.lib.php';

$encoding = '';
$action = GETPOST('action', 'aZ09');
$original_file = GETPOST('file', 'alphanohtml'); // Do not use urldecode here ($_GET are already decoded by PHP).
$hashp = GETPOST('hashp', 'aZ09');
$modulepart = GETPOST('modulepart', 'alpha');
$urlsource = GETPOST('urlsource', 'alpha');
$entity = GETPOST('entity', 'int') ?GETPOST('entity', 'int') : $conf->entity;

// Security check
if (empty($modulepart) && empty($hashp)) accessforbidden('Bad link. Bad value for parameter modulepart', 0, 0, 1);
if (empty($original_file) && empty($hashp)) accessforbidden('Bad link. Missing identification to find file (original_file or hashp)', 0, 0, 1);
if ($modulepart == 'fckeditor') $modulepart = 'medias'; // For backward compatibility

$socid = 0;
if ($user->socid > 0) $socid = $user->socid;

// For some module part, dir may be privates
if (in_array($modulepart, array('facture_paiement', 'unpaid')))
{
  if (!$user->rights->societe->client->voir || $socid) $original_file = 'private/'.$user->id.'/'.$original_file; // If user has no permission to see all, output dir is specific to user
}


/*
 * Actions
 */

// None



/*
 * View
 */

// If we have a hash public (hashp), we guess the original_file.
if (!empty($hashp))
{
  include_once DOL_DOCUMENT_ROOT.'/ecm/class/ecmfiles.class.php';
  $ecmfile = new EcmFiles($db);
  $result = $ecmfile->fetch(0, '', '', '', $hashp);
  if ($result > 0)
  {
    $tmp = explode('/', $ecmfile->filepath, 2); // $ecmfile->filepath is relative to document directory
    // filepath can be 'users/X' or 'X/propale/PR11111'
    if (is_numeric($tmp[0])) // If first tmp is numeric, it is subdir of company for multicompany, we take next part.
    {
      $tmp = explode('/', $tmp[1], 2);
    }
    $moduleparttocheck = $tmp[0]; // moduleparttocheck is first part of path

    if ($modulepart)  // Not required, so often not defined, for link using public hashp parameter.
    {
      if ($moduleparttocheck == $modulepart)
      {
        // We remove first level of directory
        $original_file = (($tmp[1] ? $tmp[1].'/' : '').$ecmfile->filename); // this is relative to module dir
        //var_dump($original_file); exit;
      } else {
        accessforbidden('Bad link. File is from another module part.', 0, 0, 1);
      }
    } else {
      $modulepart = $moduleparttocheck;
      $original_file = (($tmp[1] ? $tmp[1].'/' : '').$ecmfile->filename); // this is relative to module dir
    }
  } else {
    $langs->load("errors");
    accessforbidden($langs->trans("ErrorFileNotFoundWithSharedLink"), 0, 0, 1);
  }
}

// Define attachment (attachment=true to force choice popup 'open'/'save as')
$attachment = true;
if (preg_match('/\.(html|htm)$/i', $original_file)) $attachment = false;
if (isset($_GET["attachment"])) $attachment = GETPOST("attachment", 'alpha') ?true:false;
if (!empty($conf->global->MAIN_DISABLE_FORCE_SAVEAS)) $attachment = false;

// Define mime type
$type = 'application/octet-stream'; // By default
if (GETPOST('type', 'alpha')) $type = GETPOST('type', 'alpha');
else $type = dol_mimetype($original_file);
// Security: Force to octet-stream if file is a dangerous file. For example when it is a .noexe file
// We do not force if file is a javascript to be able to get js from website module with <script src="
// Note: Force whatever is $modulepart seems ok.
if (!in_array($type, array('text/x-javascript')) && !dolIsAllowedForPreview($original_file)) {
  $type = 'application/octet-stream';
}

// Security: Delete string ../ into $original_file
$original_file = str_replace("../", "/", $original_file);

// Find the subdirectory name as the reference
$refname = basename(dirname($original_file)."/");

// Security check
if (empty($modulepart)) accessforbidden('Bad value for parameter modulepart');

// Check security and set return info with full path of file
$check_access = dol_check_secure_access_document($modulepart, $original_file, $entity, $user, $refname);
$accessallowed              = $check_access['accessallowed'];
$sqlprotectagainstexternals = $check_access['sqlprotectagainstexternals'];
$fullpath_original_file     = $check_access['original_file']; // $fullpath_original_file is now a full path name
//var_dump($fullpath_original_file);exit;

if (!empty($hashp))
{
  $accessallowed = 1; // When using hashp, link is public so we force $accessallowed
  $sqlprotectagainstexternals = '';
} else {
  // Basic protection (against external users only)
  if ($user->socid > 0)
  {
    if ($sqlprotectagainstexternals)
    {
      $resql = $db->query($sqlprotectagainstexternals);
      if ($resql)
      {
        $num = $db->num_rows($resql);
        $i = 0;
        while ($i < $num)
        {
          $obj = $db->fetch_object($resql);
          if ($user->socid != $obj->fk_soc)
          {
            $accessallowed = 0;
            break;
          }
          $i++;
        }
      }
    }
  }
}

// Security:
// Limit access if permissions are wrong
if (!$accessallowed)
{
  accessforbidden();
}

// Security:
// We refuse directory transversal change and pipes in file names
if (preg_match('/\.\./', $fullpath_original_file) || preg_match('/[<>|]/', $fullpath_original_file))
{
  dol_syslog("Refused to deliver file ".$fullpath_original_file);
  print "ErrorFileNameInvalid: ".dol_escape_htmltag($original_file);
  exit;
}


clearstatcache();

$filename = basename($fullpath_original_file);
$filename = preg_replace('/\.noexe$/i', '', $filename);

// Output file on browser
dol_syslog("document.php download $fullpath_original_file filename=$filename content-type=$type");
$fullpath_original_file_osencoded = dol_osencode($fullpath_original_file); // New file name encoded in OS encoding charset

// This test if file exists should be useless. We keep it to find bug more easily
if (!file_exists($fullpath_original_file_osencoded))
{
  dol_syslog("ErrorFileDoesNotExists: ".$fullpath_original_file);
  print "ErrorFileDoesNotExists: ".$original_file;
  exit;
}

// Hooks
if (!is_object($hookmanager)) {
  include_once DOL_DOCUMENT_ROOT.'/core/class/hookmanager.class.php';
  $hookmanager = new HookManager($this->db);
}
$hookmanager->initHooks(array('document'));
$parameters = array('ecmfile' => $ecmfile, 'modulepart' => $modulepart, 'original_file' => $original_file,
  'entity' => $entity, 'refname' => $refname, 'fullpath_original_file' => $fullpath_original_file,
  'filename' => $filename, 'fullpath_original_file_osencoded' => $fullpath_original_file_osencoded);
$reshook = $hookmanager->executeHooks('downloadDocument', $parameters); // Note that $action and $object may have been
if ($reshook < 0) {
  $errors = $hookmanager->error.(is_array($hookmanager->errors) ? (!empty($hookmanager->error) ? ', ' : '').join($separator, $hookmanager->errors) : '');
  dol_syslog("document.php - Errors when executing the hook 'downloadDocument' : ".$errors);
  print "ErrorDownloadDocumentHooks: ".$errors;
  exit;
}

// Permissions are ok and file found, so we return it
top_httphead($type);
header('Content-Description: File Transfer');
if ($encoding)   header('Content-Encoding: '.$encoding);
// Add MIME Content-Disposition from RFC 2183 (inline=automatically displayed, attachment=need user action to open)
if ($attachment) header('Content-Disposition: attachment; filename="'.$filename.'"');
else header('Content-Disposition: inline; filename="'.$filename.'"');
// Ajout directives pour resoudre bug IE
header('Cache-Control: Public, must-revalidate');
header('Pragma: public');
$readfile = true;

// on view document, can output images with good orientation according to exif infos
if (!$attachment && !empty($conf->global->MAIN_USE_EXIF_ROTATION) && image_format_supported($fullpath_original_file_osencoded) == 1) {
  $imgres = correctExifImageOrientation($fullpath_original_file_osencoded, null);
  $readfile = !$imgres;
}

if (is_object($db)) $db->close();

// Send file now
if ($readfile) {
  header('Content-Length: '.dol_filesize($fullpath_original_file));

  readfileLowMemory($fullpath_original_file_osencoded);
}