export_files.php

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<?php
/* Copyright (C) 2006-2014  Laurent Destailleur <eldy@users.sourceforge.net>
 * Copyright (C) 2011       Juanjo Menent       <jmenent@2byte.es>
 * Copyright (C) 2015       Raphaël Doursenaud  <rdoursenaud@gpcsolutions.fr>
 * Copyright (C) 2021   Regis Houssin   <regis.houssin@inodbox.com>
 *
 * 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/>.
 */

if (! defined('CSRFCHECK_WITH_TOKEN')) {
  define('CSRFCHECK_WITH_TOKEN', '1');    // Force use of CSRF protection with tokens even for GET
}

require '../../main.inc.php';
require_once DOL_DOCUMENT_ROOT.'/core/lib/admin.lib.php';
require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
require_once DOL_DOCUMENT_ROOT.'/core/class/utils.class.php';
require_once DOL_DOCUMENT_ROOT.'/core/class/html.formfile.class.php';

$langs->load("admin");

$action = GETPOST('action', 'aZ09');
$what = GETPOST('what', 'alpha');
$export_type = GETPOST('export_type', 'alpha');
$file = trim(GETPOST('zipfilename_template', 'alpha'));
$compression = GETPOST('compression', 'aZ09');

$file = dol_sanitizeFileName($file);
$file = preg_replace('/(\.zip|\.tar|\.tgz|\.gz|\.tar\.gz|\.bz2|\.zst)$/i', '', $file);

$sortfield = GETPOST('sortfield', 'aZ09comma');
$sortorder = GETPOST('sortorder', 'aZ09comma');
$page = GETPOSTISSET('pageplusone') ? (GETPOST('pageplusone') - 1) : GETPOST("page", 'int');
if (!$sortorder) {
  $sortorder = "DESC";
}
if (!$sortfield) {
  $sortfield = "date";
}
if ($page < 0) {
  $page = 0;
} elseif (empty($page)) {
  $page = 0;
}
$limit = GETPOST('limit', 'int') ?GETPOST('limit', 'int') : $conf->liste_limit;
$offset = $limit * $page;

if (!$user->admin) {
  accessforbidden();
}

$errormsg = '';


/*
 * Actions
 */

if ($action == 'delete') {
  $filerelative = dol_sanitizeFileName(GETPOST('urlfile', 'alpha'));
  $filepath = $conf->admin->dir_output.'/'.$filerelative;
  $ret = dol_delete_file($filepath, 1);
  if ($ret) {
    setEventMessages($langs->trans("FileWasRemoved", $filerelative), null, 'mesgs');
  } else {
    setEventMessages($langs->trans("ErrorFailToDeleteFile", $filerelative), null, 'errors');
  }
  $action = '';
}


/*
 * View
 */

// Increase limit of time. Works only if we are not in safe mode
$ExecTimeLimit = 1800; // 30mn
if (!empty($ExecTimeLimit)) {
  $err = error_reporting();
  error_reporting(0); // Disable all errors
  //error_reporting(E_ALL);
  @set_time_limit($ExecTimeLimit); // Need more than 240 on Windows 7/64
  error_reporting($err);
}

/* If value has been forced with a php_admin_value, this has no effect. Example of value: '512M' */
$MemoryLimit = getDolGlobalString('MAIN_MEMORY_LIMIT_ARCHIVE_DATAROOT');
if (!empty($MemoryLimit)) {
  @ini_set('memory_limit', $MemoryLimit);
}

$form = new Form($db);
$formfile = new FormFile($db);

//$help_url='EN:Backups|FR:Sauvegardes|ES:Copias_de_seguridad';
//llxHeader('','',$help_url);

//print load_fiche_titre($langs->trans("Backup"),'','title_setup');


// Start with empty buffer
$dump_buffer = '';
$dump_buffer_len = 0;

// We will send fake headers to avoid browser timeout when buffering
$time_start = time();


$outputdir  = $conf->admin->dir_output.'/documents';
$result = dol_mkdir($outputdir);

$utils = new Utils($db);

if ($export_type == 'externalmodule' && ! empty($what)) {
  $fulldirtocompress = DOL_DOCUMENT_ROOT.'/custom/'.dol_sanitizeFileName($what);
} else {
  $fulldirtocompress = DOL_DATA_ROOT;
}
$dirtoswitch = dirname($fulldirtocompress);
$dirtocompress = basename($fulldirtocompress);

if ($compression == 'zip') {
  $file .= '.zip';

  $excludefiles = '/(\.back|\.old|\.log|\.pdf_preview-.*\.png|[\/\\\]temp[\/\\\]|[\/\\\]admin[\/\\\]documents[\/\\\])/i';

  //var_dump($fulldirtocompress);
  //var_dump($outputdir."/".$file);exit;

  $rootdirinzip = '';
  if ($export_type == 'externalmodule' && !empty($what)) {
    $rootdirinzip = $what;

    global $dolibarr_allow_download_external_modules;
    if (empty($dolibarr_allow_download_external_modules)) {
      print 'Download of external modules is not allowed by $dolibarr_allow_download_external_modules in conf.php file';
      $db->close();
      exit();
    }
  }

  $ret = dol_compress_dir($fulldirtocompress, $outputdir."/".$file, $compression, $excludefiles, $rootdirinzip);
  if ($ret < 0) {
    if ($ret == -2) {
      $langs->load("errors");
      $errormsg = $langs->trans("ErrNoZipEngine");
    } else {
      $langs->load("errors");
      $errormsg = $langs->trans("ErrorFailedToWriteInDir", $outputdir);
    }
  }
} elseif (in_array($compression, array('gz', 'bz', 'zstd'))) {
  $userlogin = ($user->login ? $user->login : 'unknown');

  $outputfile = $conf->admin->dir_temp.'/export_files.'.$userlogin.'.out'; // File used with popen method

  $file .= '.tar';

  // We also exclude '/temp/' dir and 'documents/admin/documents'
  // We make escapement here and call executeCLI without escapement because we don't want to have the '*.log' escaped.
  $cmd = "tar -cf '".escapeshellcmd($outputdir."/".$file)."' --exclude-vcs --exclude-caches-all --exclude='temp' --exclude='*.log' --exclude='*.pdf_preview-*.png' --exclude='documents/admin/documents' -C '".escapeshellcmd(dol_sanitizePathName($dirtoswitch))."' '".escapeshellcmd(dol_sanitizeFileName($dirtocompress))."'";

  $result = $utils->executeCLI($cmd, $outputfile, 0, null, 1);

  $retval = $result['error'];
  if ($result['result'] || !empty($retval)) {
    $langs->load("errors");
    dol_syslog("Documents tar retval after exec=".$retval, LOG_ERR);
    $errormsg = 'Error tar generation return '.$retval;
  } else {
    if ($compression == 'gz') {
      $cmd = "gzip -f ".$outputdir."/".$file;
    } elseif ($compression == 'bz') {
      $cmd = "bzip2 -f ".$outputdir."/".$file;
    } elseif ($compression == 'zstd') {
      $cmd = "zstd -z -9 -q --rm ".$outputdir."/".$file;
    }

    $result = $utils->executeCLI($cmd, $outputfile);

    $retval = $result['error'];
    if ($result['result'] || !empty($retval)) {
      $errormsg = 'Error '.$compression.' generation return '.$retval;
      unlink($outputdir."/".$file);
    }
  }
} else {
  $errormsg = 'Bad value for compression method';
  print $errormsg;
}

if ($export_type != 'externalmodule' || empty($what)) {
  if ($errormsg) {
    setEventMessages($langs->trans("Error")." : ".$errormsg, null, 'errors');
  } else {
    setEventMessages($langs->trans("BackupFileSuccessfullyCreated").'.<br>'.$langs->trans("YouCanDownloadBackupFile"), null, 'mesgs');
  }

  $db->close();

  // Redirect to calling page
  $returnto = 'dolibarr_export.php';

  header("Location: ".$returnto);
  exit();
} else {
  $zipname = $outputdir."/".$file;

  // Then download the zipped file.
  header('Content-Type: application/zip');
  header('Content-disposition: attachment; filename='.basename($zipname));
  header('Content-Length: '.filesize($zipname));
  readfile($zipname);

  dol_delete_file($zipname);

  $db->close();

  exit();
}