flowjs-server.php

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<?php
/* Copyright (C) 2023 Laurent Destailleur <eldy@users.sourceforge.net>
 *
 * 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('NOTOKENRENEWAL')) {
  define('NOTOKENRENEWAL', '1'); // Disables token renewal
}
if (!defined('NOREQUIREMENU')) {
  define('NOREQUIREMENU', '1');
}
if (!defined('NOREQUIREHTML')) {
  define('NOREQUIREHTML', '1');
}
if (!defined('NOREQUIREAJAX')) {
  define('NOREQUIREAJAX', '1');
}
if (!defined('NOREQUIRESOC')) {
  define('NOREQUIRESOC', '1');
}
// If there is no need to load and show top and left menu
if (!defined("NOLOGIN")) {
  define("NOLOGIN", '1');
}
//if (! defined('NOREQUIRETRAN'))  define('NOREQUIRETRAN','1');    // Required to know date format for dol_print_date
 
// Load Dolibarr environment
require '../../main.inc.php';
require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
 
$action = GETPOST('action', 'aZ09');
 
$module = GETPOST('module', 'aZ09arobase');
 
$flowFilename = GETPOST('flowFilename', 'alpha');
$flowIdentifier = GETPOST('flowIdentifier', 'alpha');
$flowChunkNumber = GETPOST('flowChunkNumber', 'alpha');
$flowChunkSize = GETPOST('flowChunkSize', 'alpha');
$flowTotalSize = GETPOST('flowTotalSize', 'alpha');
 
$result = restrictedArea($user, $module, 0, '', 0, 'fk_soc', 'rowid', 0, 1);  // Call with mode return
 
if ($action != 'upload') {
  httponly_accessforbidden("Param action must be 'upload'");
}
 
if (!empty($conf->$module->dir_temp)) {
  $upload_dir = $conf->$module->dir_temp;
} else {
  httponly_accessforbidden("Param module does not has a dir_temp directory. Module does not exists or is not activated.");
}
 
/*
 * Action
 */
 
top_httphead();
 
dol_syslog(join(',', $_GET));
 
$result = false;
 
if (!empty($upload_dir)) {
  $temp_dir = $upload_dir.'/'.$flowIdentifier;
} else {
  $temp_dir = DOL_DATA_ROOT.'/'.$module.'/temp/'.$flowIdentifier;
  $upload_dir = DOL_DATA_ROOT.'/'.$module.'/temp/';
}
 
if ($module != "test" && !isModEnabled($module)) {
  echo json_encode("The module ".$module." is not enabled");
  header("HTTP/1.0 400");
  die();
}
 
if ($_SERVER['REQUEST_METHOD'] === 'GET') {
  $chunk_file = $temp_dir.'/'.$flowFilename.'.part'.$flowChunkNumber;
  if (file_exists($chunk_file)) {
    header("HTTP/1.0 200 Ok");
  } else {
    header("HTTP/1.0 404 Not Found");
  }
} else {
  // loop through files and move the chunks to a temporarily created directory
  if (file_exists($upload_dir.'/'.$flowFilename)) {
    echo json_encode('File '.$flowIdentifier.' was already uploaded');
    header("HTTP/1.0 200 Ok");
    die();
  } elseif (!empty($_FILES)) {
    foreach ($_FILES as $file) {
      // check the error status
      if ($file['error'] != 0) {
        dol_syslog('error '.$file['error'].' in file '.$flowFilename);
        continue;
      }
 
      // init the destination file (format <filename.ext>.part<#chunk>
      // the file is stored in a temporary directory
      $dest_file = $temp_dir.'/'.$flowFilename.'.part'.$flowChunkNumber;
 
      // create the temporary directory
      if (!dol_is_dir($temp_dir)) {
        dol_mkdir($temp_dir);
      }
 
      // move the temporary file
      if (!dol_move_uploaded_file($file['tmp_name'], $dest_file, 0)) {
        dol_syslog('Error saving (move_uploaded_file) chunk '.$flowChunkNumber.' for file '.$flowFilename);
      } else {
        // check if all the parts present, and create the final destination file
        $result = createFileFromChunks($temp_dir, $upload_dir, $flowFilename, $flowChunkSize, $flowTotalSize);
      }
    }
  }
}
if ($result) {
  echo json_encode('File '.$flowIdentifier.' uploaded');
} else {
  echo json_encode('Error while uploading file '.$flowIdentifier);
}
 
 
function createFileFromChunks($temp_dir, $upload_dir, $fileName, $chunkSize, $totalSize)
{
  dol_syslog(__FUNCTION__, LOG_DEBUG);
 
  // count all the parts of this file
  $total_files = 0;
  $files = dol_dir_list($temp_dir, 'files');
  foreach ($files as $file) {
    if (stripos($file["name"], $fileName) !== false) {
      $total_files++;
    }
  }
 
  // check that all the parts are present
  // the size of the last part is between chunkSize and 2*$chunkSize
  if ($total_files * $chunkSize >=  ($totalSize - $chunkSize + 1)) {
    // create the final destination file
    if (($fp = fopen($upload_dir.'/'.$fileName, 'w')) !== false) {
      for ($i=1; $i<=$total_files; $i++) {
        fwrite($fp, file_get_contents($temp_dir.'/'.$fileName.'.part'.$i));
        dol_syslog('writing chunk '.$i);
      }
      fclose($fp);
    } else {
      dol_syslog('cannot create the destination file');
      return false;
    }
 
    // rename the temporary directory (to avoid access from other
    // concurrent chunks uploads)
    @rename($temp_dir, $temp_dir.'_UNUSED');
  }
 
  return true;
}