Bump version to 0.9.6.8.15

Flatten empty WebDAV root into gallery root
Bump version to 0.9.6.8.14
2026-09-19 17:34:31 +00:00 · 2026-08-20 16:54:35 +02:00 · 2026-08-20 16:54:06 +02:00 · 2026-08-20 16:41:27 +02:00 · 2026-08-20 16:41:10 +02:00 · 2026-08-20 16:40:47 +02:00
17 changed files with 1908 additions and 38 deletions
--- a/include/nc_connector_system.inc.php
+++ b/include/nc_connector_system.inc.php
@@ -4,9 +4,14 @@ if (!defined('PHPWG_ROOT_PATH'))
  die('Hacking attempt!');
 }

-function bratonien_tools_nc_connector_systemctl_value(array $args)
+function bratonien_tools_nc_connector_systemctl_run(array $args)
 {
-  if (!function_exists('proc_open')) return '';
+  $result = array('exit'=>-1, 'stdout'=>'', 'stderr'=>'');
+  if (!function_exists('proc_open'))
+  {
+    $result['stderr'] = 'proc_open ist in PHP nicht verfügbar.';
+    return $result;
+  }

  $command = array_merge(array('/usr/bin/systemctl'), $args);
  $spec = array(
@@ -16,13 +21,71 @@ function bratonien_tools_nc_connector_systemctl_value(array $args)
  );
  $environment = array_merge($_ENV, array('LC_ALL'=>'C','LANG'=>'C'));
  $process = @proc_open($command, $spec, $pipes, null, $environment);
-  if (!is_resource($process)) return '';
-  $stdout = stream_get_contents($pipes[1]);
-  stream_get_contents($pipes[2]);
+  if (!is_resource($process))
+  {
+    $result['stderr'] = 'systemctl konnte nicht gestartet werden.';
+    return $result;
+  }
+
+  $result['stdout'] = trim((string)stream_get_contents($pipes[1]));
+  $result['stderr'] = trim((string)stream_get_contents($pipes[2]));
  fclose($pipes[1]);
  fclose($pipes[2]);
-  $exit = proc_close($process);
-  return $exit === 0 ? trim((string)$stdout) : '';
+  $result['exit'] = (int)proc_close($process);
+  return $result;
+}
+
+function bratonien_tools_nc_connector_systemctl_value(array $args)
+{
+  $result = bratonien_tools_nc_connector_systemctl_run($args);
+  return $result['exit'] === 0 ? $result['stdout'] : '';
+}
+
+function bratonien_tools_nc_connector_run_now()
+{
+  if (!function_exists('proc_open'))
+  {
+    throw new RuntimeException('WebDAV-Abgleich konnte nicht gestartet werden: proc_open ist in PHP nicht verfügbar.');
+  }
+
+  $runtime_dir = realpath(dirname(__DIR__).'/runtime');
+  if ($runtime_dir === false || !is_dir($runtime_dir))
+  {
+    throw new RuntimeException('WebDAV-Abgleich konnte nicht gestartet werden: Runtime-Verzeichnis wurde nicht gefunden.');
+  }
+
+  $script = $runtime_dir.'/run-all.sh';
+  if (!is_file($script) || !is_readable($script))
+  {
+    throw new RuntimeException('WebDAV-Abgleich konnte nicht gestartet werden: runtime/run-all.sh ist nicht lesbar.');
+  }
+
+  $spec = array(
+    0=>array('file','/dev/null','r'),
+    1=>array('pipe','w'),
+    2=>array('pipe','w'),
+  );
+  $environment = array_merge($_ENV, array('LC_ALL'=>'C','LANG'=>'C'));
+  $process = @proc_open(array('/usr/bin/env','bash',$script), $spec, $pipes, $runtime_dir, $environment);
+  if (!is_resource($process))
+  {
+    throw new RuntimeException('WebDAV-Abgleich konnte nicht gestartet werden: Connector-Prozess konnte nicht geöffnet werden.');
+  }
+
+  $stdout = trim((string)stream_get_contents($pipes[1]));
+  $stderr = trim((string)stream_get_contents($pipes[2]));
+  fclose($pipes[1]);
+  fclose($pipes[2]);
+  $exit = (int)proc_close($process);
+
+  if ($exit !== 0)
+  {
+    $detail = $stderr !== '' ? $stderr : $stdout;
+    if ($detail === '') $detail = 'Exit-Code '.$exit;
+    throw new RuntimeException('WebDAV-Abgleich fehlgeschlagen: '.$detail);
+  }
+
+  return array('message'=>'WebDAV-Abgleich wurde ausgeführt.');
 }

 function bratonien_tools_nc_connector_parse_systemd_time($value)
@@ -112,6 +175,15 @@ function bratonien_tools_nc_connector_last_status(array $connections)
  return $latest;
 }

+function bratonien_tools_nc_connector_status_message(array $last)
+{
+  if ((string)($last['state'] ?? '') === 'ok')
+  {
+    return 'WebDAV eingelesen und Piwigo synchronisiert';
+  }
+  return (string)($last['message'] ?? '');
+}
+
 function bratonien_tools_nc_connector_system_status(array $connections = array())
 {
  $timer = 'bratonien-nc-connector.timer';
@@ -143,7 +215,7 @@ function bratonien_tools_nc_connector_system_status(array $connections = array()
    'last_run_timestamp'=>(int)$last['timestamp'],
    'last_run_label'=>$last['timestamp'] > 0 ? date('d.m.Y H:i:s', (int)$last['timestamp']) : 'Nicht verfügbar',
    'last_run_state'=>(string)$last['state'],
-    'last_run_message'=>(string)$last['message'],
+    'last_run_message'=>bratonien_tools_nc_connector_status_message($last),
    'last_run_auth_mode'=>(string)$last['auth_mode'],
    'last_run_api_state'=>(string)$last['api_state'],
    'last_run_api_message'=>(string)$last['api_message'],
--- a/include/tool_registry.inc.php
+++ b/include/tool_registry.inc.php
@@ -50,6 +50,7 @@ function bratonien_tools_get_tools()
    'nc_connector_create_webdav_parallel' => array('handler' => 'bratonien_tools_nc_connector_create_webdav_placeholder_from_wizard'),
    'nc_connector_delete' => array('handler' => 'bratonien_tools_nc_connector_delete_safe'),
    'nc_connector_update_name' => array('handler' => 'bratonien_tools_nc_connector_update_name'),
+    'nc_connector_run_now' => array('handler' => 'bratonien_tools_nc_connector_run_now'),
    'nc_connector_wizard_scan' => array('handler' => 'bratonien_tools_nc_wizard_scan_webdav_first'),
    'nc_connector_wizard_directory_browse' => array('handler' => 'bratonien_tools_nc_wizard_directory_browse'),
    'nc_connector_wizard_directory_add' => array('handler' => 'bratonien_tools_nc_wizard_directory_add'),
--- a/include/webdav_materialize_runtime.inc.php
+++ b/include/webdav_materialize_runtime.inc.php
@@ -0,0 +1,274 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_webdav_materialize_source_info($image_id)
+{
+  static $cache = array();
+
+  $image_id = (int)$image_id;
+  if ($image_id < 1) return null;
+  if (array_key_exists($image_id, $cache)) return $cache[$image_id];
+
+  $result = pwg_query('SELECT path, coi FROM '.IMAGES_TABLE.' WHERE id='.$image_id.' LIMIT 1');
+  if (!pwg_db_num_rows($result)) return $cache[$image_id] = null;
+
+  $row = pwg_db_fetch_assoc($result);
+  $path = (string)($row['path'] ?? '');
+  if ($path === '') return $cache[$image_id] = null;
+
+  $absolute = $path;
+  if (strpos($absolute, '/') !== 0)
+  {
+    $absolute = PHPWG_ROOT_PATH.ltrim(preg_replace('#^\./#', '', $absolute), '/');
+  }
+
+  $resolved = realpath($absolute);
+  if ($resolved === false) return $cache[$image_id] = null;
+
+  $normalized = str_replace('\\', '/', $resolved);
+  if (!preg_match('#/nc-webdav-source/connection-([0-9]+)/root-([0-9]+)/(.*)$#', $normalized, $match))
+  {
+    return $cache[$image_id] = null;
+  }
+
+  $connection_id = (int)$match[1];
+  $root_fileid = (int)$match[2];
+  $relative_path = trim((string)$match[3], '/');
+  if ($connection_id < 1 || $root_fileid < 1 || $relative_path === '')
+  {
+    return $cache[$image_id] = null;
+  }
+
+  $table = defined('BRATONIEN_TOOLS_NC_CONNECTIONS_TABLE')
+    ? BRATONIEN_TOOLS_NC_CONNECTIONS_TABLE
+    : $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
+  $connection_result = pwg_query('SELECT config_json FROM `'.$table.'` WHERE id='.$connection_id.' LIMIT 1');
+  if (!pwg_db_num_rows($connection_result)) return $cache[$image_id] = null;
+
+  $connection_row = pwg_db_fetch_assoc($connection_result);
+  $config = json_decode((string)$connection_row['config_json'], true);
+  if (!is_array($config) || (string)($config['source_mode'] ?? '') !== 'webdav-placeholder')
+  {
+    return $cache[$image_id] = null;
+  }
+
+  $root_found = false;
+  $root_path = '';
+  $roots = isset($config['roots']) && is_array($config['roots']) ? $config['roots'] : array();
+  foreach ($roots as $root)
+  {
+    if ((int)($root['fileid'] ?? 0) === $root_fileid)
+    {
+      $root_found = true;
+      $root_path = trim((string)($root['webdav_path'] ?? ''), '/');
+      break;
+    }
+  }
+  if (!$root_found) return $cache[$image_id] = null;
+
+  $webdav_path = trim($root_path === '' ? $relative_path : $root_path.'/'.$relative_path, '/');
+  if ($webdav_path === '') return $cache[$image_id] = null;
+
+  $content_type = '';
+  $size = 0;
+  $etag = '';
+  $state_dir = rtrim((string)($config['state_dir'] ?? ''), '/');
+  if ($state_dir !== '')
+  {
+    $mapping_file = $state_dir.'/webdav-map.json';
+    if (is_readable($mapping_file))
+    {
+      $mapping = json_decode((string)file_get_contents($mapping_file), true);
+      if (is_array($mapping) && isset($mapping['files']) && is_array($mapping['files']))
+      {
+        $entry = $mapping['files'][$resolved] ?? $mapping['files'][$normalized] ?? null;
+        if (is_array($entry) && (string)($entry['kind'] ?? '') === 'file')
+        {
+          $mapped_path = trim((string)($entry['webdav_path'] ?? ''), '/');
+          if ($mapped_path !== '') $webdav_path = $mapped_path;
+          $content_type = (string)($entry['content_type'] ?? '');
+          $size = (int)($entry['size'] ?? 0);
+          $etag = (string)($entry['etag'] ?? '');
+        }
+      }
+    }
+  }
+
+  return $cache[$image_id] = array(
+    'image_id'=>$image_id,
+    'connection_id'=>$connection_id,
+    'root_fileid'=>$root_fileid,
+    'relative_path'=>$relative_path,
+    'webdav_path'=>$webdav_path,
+    'content_type'=>$content_type,
+    'size'=>$size,
+    'etag'=>$etag,
+    'coi'=>$row['coi'] ?? null,
+  );
+}
+
+function bratonien_tools_webdav_materialize_image_url($image_id)
+{
+  $info = bratonien_tools_webdav_materialize_source_info($image_id);
+  if (!$info) return null;
+
+  $url = get_root_url().'plugins/'.BRATONIEN_TOOLS_ID.'/webdav-image.php?id='.(int)$image_id;
+  if ($info['etag'] !== '') $url .= '&v='.rawurlencode(substr(sha1($info['etag']), 0, 12));
+  return $url;
+}
+
+function bratonien_tools_webdav_materialize_custom_params($key)
+{
+  if (!class_exists('DerivativeParams') || !class_exists('SizingParams')) return null;
+
+  $tokens = explode('_', trim((string)$key));
+  if (!$tokens || $tokens[0] === '') return null;
+
+  $parse_size = function($value)
+  {
+    if (!preg_match('/^[0-9]+(?:x[0-9]+)?$/', (string)$value)) return null;
+    $parts = explode('x', (string)$value, 2);
+    $width = (int)$parts[0];
+    $height = count($parts) === 1 ? $width : (int)$parts[1];
+    if ($width < 1 || $height < 1 || $width > 20000 || $height > 20000) return null;
+    return array($width, $height);
+  };
+
+  $token = array_shift($tokens);
+  $crop = 0;
+  $min_size = null;
+
+  if (isset($token[0]) && $token[0] === 's')
+  {
+    $size = $parse_size(substr($token, 1));
+  }
+  elseif (isset($token[0]) && $token[0] === 'e')
+  {
+    $crop = 1;
+    $size = $min_size = $parse_size(substr($token, 1));
+  }
+  else
+  {
+    if (count($tokens) < 2) return null;
+    $size = $parse_size($token);
+    $crop_token = (string)array_shift($tokens);
+    $min_size = $parse_size(array_shift($tokens));
+    if (!preg_match('/^[a-z]$/', $crop_token) || $min_size === null) return null;
+    $crop = function_exists('char_to_fraction') ? char_to_fraction($crop_token) : 0;
+  }
+
+  if ($size === null) return null;
+
+  $params = new DerivativeParams(new SizingParams($size, $crop, $min_size));
+  if (class_exists('ImageStdParams')) ImageStdParams::apply_global($params);
+  return $params;
+}
+
+function bratonien_tools_webdav_materialize_variant_from_params($params)
+{
+  if (!is_object($params) || !class_exists('ImageStdParams')) return null;
+
+  $type = (string)($params->type ?? '');
+  $defined = ImageStdParams::get_defined_type_map();
+  if ($type !== '' && defined('IMG_CUSTOM') && $type !== IMG_CUSTOM && isset($defined[$type]))
+  {
+    return 'standard:'.$type;
+  }
+
+  if (!method_exists($params, 'add_url_tokens')) return null;
+  $tokens = array();
+  $params->add_url_tokens($tokens);
+  if (!$tokens) return null;
+
+  $key = implode('_', $tokens);
+  if (!preg_match('/^[A-Za-z0-9_x-]+$/', $key)) return null;
+  return 'custom:'.$key;
+}
+
+function bratonien_tools_webdav_materialize_params_from_variant($variant)
+{
+  $variant = trim((string)$variant);
+  if ($variant === '' || !class_exists('ImageStdParams')) return null;
+
+  if (strpos($variant, 'standard:') === 0)
+  {
+    $type = substr($variant, strlen('standard:'));
+    $defined = ImageStdParams::get_defined_type_map();
+    return isset($defined[$type]) ? $defined[$type] : null;
+  }
+
+  if (strpos($variant, 'custom:') === 0)
+  {
+    $key = substr($variant, strlen('custom:'));
+    if (!preg_match('/^[A-Za-z0-9_x-]+$/', $key)) return null;
+    return bratonien_tools_webdav_materialize_custom_params($key);
+  }
+
+  return null;
+}
+
+function bratonien_tools_webdav_materialize_b64url_encode($value)
+{
+  return rtrim(strtr(base64_encode((string)$value), '+/', '-_'), '=');
+}
+
+function bratonien_tools_webdav_materialize_after_signature($image_id, $variant, $after_url)
+{
+  global $conf;
+  $key = !empty($conf['secret_key']) ? $conf['secret_key'] : ($conf['db_password'] ?? 'bratonien-tools');
+  return hash_hmac('sha256', (int)$image_id.'|'.(string)$variant.'|'.(string)$after_url, $key);
+}
+
+function bratonien_tools_webdav_materialize_derivative_url($image_id, $variant, array $info, $after_url='')
+{
+  $url = get_root_url().'plugins/'.BRATONIEN_TOOLS_ID.'/webdav-derivative.php?id='.(int)$image_id.'&variant='.rawurlencode($variant);
+  if ($after_url !== '')
+  {
+    $url .= '&after='.rawurlencode(bratonien_tools_webdav_materialize_b64url_encode($after_url));
+    $url .= '&sig='.rawurlencode(bratonien_tools_webdav_materialize_after_signature($image_id, $variant, $after_url));
+  }
+  if (!empty($info['etag'])) $url .= '&v='.rawurlencode(substr(sha1((string)$info['etag']), 0, 12));
+  return $url;
+}
+
+function bratonien_tools_filter_webdav_materialize_src_url($url, $src_image)
+{
+  if (!is_object($src_image) || empty($src_image->id)) return $url;
+  $webdav_url = bratonien_tools_webdav_materialize_image_url((int)$src_image->id);
+  return $webdav_url ?: $url;
+}
+
+function bratonien_tools_filter_webdav_materialize_derivative_url($url, $params, $src_image, $rel_url)
+{
+  if (!is_object($src_image) || empty($src_image->id)) return $url;
+
+  $image_id = (int)$src_image->id;
+  $info = bratonien_tools_webdav_materialize_source_info($image_id);
+  if (!$info) return $url;
+
+  try
+  {
+    $derivative = new DerivativeImage($params, $src_image);
+    if ($derivative->same_as_source())
+    {
+      $source_url = bratonien_tools_webdav_materialize_image_url($image_id);
+      return $source_url ?: $url;
+    }
+
+    $path = $derivative->get_path();
+    if ($path !== '' && is_file($path) && is_readable($path)) return $url;
+
+    $variant = bratonien_tools_webdav_materialize_variant_from_params($params);
+    if ($variant === null) return $url;
+
+    return bratonien_tools_webdav_materialize_derivative_url($image_id, $variant, $info, (string)$url);
+  }
+  catch (Throwable $e)
+  {
+    error_log('Bratonien WebDAV materialize derivative #'.$image_id.': '.$e->getMessage());
+    return $url;
+  }
+}
--- a/js/admin_tabs.js
+++ b/js/admin_tabs.js
@@ -1,6 +1,40 @@
 (function () {
  'use strict';

+  function initNcConnectorRunNow() {
+    var section = document.getElementById('nc-connector');
+    if (!section || section.querySelector('[data-nc-run-now]')) return;
+
+    var statusCard = section.querySelector('.bratonien-card');
+    var token = section.querySelector('input[name="pwg_token"]');
+    if (!statusCard || !token) return;
+
+    var actions = document.createElement('div');
+    actions.className = 'bratonien-actions';
+    actions.style.marginTop = '1rem';
+    actions.setAttribute('data-nc-run-now', '1');
+
+    var form = document.createElement('form');
+    form.method = 'post';
+
+    var tokenInput = document.createElement('input');
+    tokenInput.type = 'hidden';
+    tokenInput.name = 'pwg_token';
+    tokenInput.value = token.value;
+
+    var button = document.createElement('button');
+    button.className = 'buttonLike';
+    button.type = 'submit';
+    button.name = 'bratonien_tool';
+    button.value = 'nc_connector_run_now';
+    button.textContent = 'Jetzt abrufen';
+
+    form.appendChild(tokenInput);
+    form.appendChild(button);
+    actions.appendChild(form);
+    statusCard.appendChild(actions);
+  }
+
  function initBratonienTabs() {
    var admin = document.querySelector('.bratonien-admin');
    if (!admin) return;
@@ -113,9 +147,14 @@
    activate(initial, false);
  }

-  if (document.readyState === 'loading') {
-    document.addEventListener('DOMContentLoaded', initBratonienTabs);
-  } else {
+  function init() {
    initBratonienTabs();
+    initNcConnectorRunNow();
+  }
+
+  if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', init);
+  } else {
+    init();
  }
 })();
--- a/main.inc.php
+++ b/main.inc.php
@@ -1,7 +1,7 @@
 <?php
 /*
 Plugin Name: Bratonien Tools
-Version: 0.9.6.2
+Version: 0.9.6.8.15
 Description: Erweiterbare Administrationswerkzeuge fuer die Bratonien-Piwigo-Installation.
 Plugin URI: https://github.com/Terranom674/Piwigo_Bratonien_Tools
 Author: Bratonien
@@ -17,6 +17,7 @@ define('BRATONIEN_TOOLS_PATH', PHPWG_PLUGINS_PATH . BRATONIEN_TOOLS_ID . '/');

 require_once(BRATONIEN_TOOLS_PATH . 'include/watermark_runtime.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/webdav_image_runtime.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/webdav_materialize_runtime.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/public_selection.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/picture_navigation.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/batch_titles.inc.php');
@@ -26,8 +27,8 @@ require_once(BRATONIEN_TOOLS_PATH . 'include/nc_productive_ws.inc.php');

 add_event_handler('get_admin_plugin_menu_links', 'bratonien_tools_admin_menu');
 add_event_handler('get_derivative_url', 'bratonien_tools_filter_derivative_url', EVENT_HANDLER_PRIORITY_NEUTRAL, 4);
-add_event_handler('get_src_image_url', 'bratonien_tools_filter_webdav_src_url', EVENT_HANDLER_PRIORITY_NEUTRAL + 50, 2);
-add_event_handler('get_derivative_url', 'bratonien_tools_filter_webdav_derivative_url', EVENT_HANDLER_PRIORITY_NEUTRAL + 50, 4);
+add_event_handler('get_src_image_url', 'bratonien_tools_filter_webdav_materialize_src_url', EVENT_HANDLER_PRIORITY_NEUTRAL + 50, 2);
+add_event_handler('get_derivative_url', 'bratonien_tools_filter_webdav_materialize_derivative_url', EVENT_HANDLER_PRIORITY_NEUTRAL + 50, 4);
 add_event_handler('loc_end_element_set_global', 'bratonien_tools_batch_titles_register_action');
 add_event_handler('element_set_global_action', 'bratonien_tools_batch_titles_apply', EVENT_HANDLER_PRIORITY_NEUTRAL, 2);
 add_event_handler('init', 'bratonien_tools_prepare_connector_private_import', EVENT_HANDLER_PRIORITY_NEUTRAL - 30);
@@ -81,36 +82,46 @@ function bratonien_tools_prepare_private_album_permissions()
    return;
  }

-  $result = pwg_query('SELECT status FROM '.CATEGORIES_TABLE.' WHERE id = '.$category_id.' LIMIT 1');
-  if (!pwg_db_num_rows($result))
+  bratonien_tools_grant_private_album_access($category_id, (int)$user['id']);
+}
+
+function bratonien_tools_grant_private_album_access($category_id, $user_id)
+{
+  $category_id = (int)$category_id;
+  $user_id = (int)$user_id;
+  if ($category_id < 1 || $user_id < 1)
  {
    return;
  }

-  $category = pwg_db_fetch_assoc($result);
-  if ($category['status'] !== 'public')
+  $query = '
+SELECT 1
+  FROM '.USER_ACCESS_TABLE.'
+  WHERE user_id = '.$user_id.'
+    AND cat_id = '.$category_id.'
+  LIMIT 1
+;';
+  $result = pwg_query($query);
+  if (pwg_db_num_rows($result) > 0)
  {
    return;
  }

-  $users = isset($_POST['users']) && is_array($_POST['users']) ? $_POST['users'] : array();
-  $current_user_id = (int)$user['id'];
-  $normalized_user_ids = array_map('intval', $users);
-
-  if (!in_array($current_user_id, $normalized_user_ids, true))
-  {
-    $users[] = $current_user_id;
-  }
-
-  $_POST['users'] = $users;
+  single_insert(
+    USER_ACCESS_TABLE,
+    array(
+      'user_id' => $user_id,
+      'cat_id' => $category_id,
+    )
+  );
 }

 function bratonien_tools_admin_menu($menu)
 {
  $menu[] = array(
    'NAME' => 'Bratonien Tools',
-    'URL' => get_root_url() . 'admin.php?page=plugin-' . BRATONIEN_TOOLS_ID,
+    'URL'  => get_root_url() . 'admin.php?page=plugin-' . BRATONIEN_TOOLS_ID,
  );
-
  return $menu;
 }
+?>
--- a/runtime/lib/build_webdav_placeholder_source.py
+++ b/runtime/lib/build_webdav_placeholder_source.py
@@ -269,7 +269,20 @@ def main() -> int:
            total_files += files
            total_folders += folders
            total_skipped += skipped
-            manifest.append(f"webdav:{fileid}\tfolder\t{display}\t{source_dir / local_name}")
+
+            if remote_root == "":
+                for child in sorted(local_root.iterdir(), key=lambda item: (item.name.casefold(), item.name)):
+                    child_data = mapping.get(str(child))
+                    if not child_data:
+                        continue
+                    child_fileid = int(child_data.get("fileid", 0))
+                    child_display = str(child_data.get("display_name", "")).strip() or child.name
+                    child_type = "folder" if child.is_dir() else "file"
+                    manifest.append(
+                        f"webdav:{child_fileid}\t{child_type}\t{child_display}\t{source_dir / local_name / child.name}"
+                    )
+            else:
+                manifest.append(f"webdav:{fileid}\tfolder\t{display}\t{source_dir / local_name}")

        if previous.exists():
            shutil.rmtree(previous)
--- a/runtime/lib/shadow_tree.py
+++ b/runtime/lib/shadow_tree.py
@@ -12,6 +12,7 @@ from pathlib import Path

 ALLOWED = frozenset("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.")
 GERMAN = str.maketrans({"ä": "ae", "ö": "oe", "ü": "ue", "Ä": "Ae", "Ö": "Oe", "Ü": "Ue", "ß": "ss", "ẞ": "SS"})
+SHADOW_DIR_MODE = 0o777


 def safe_name(name: str) -> str:
@@ -79,8 +80,13 @@ def preferred_target(source_key: str, raw_name: str, parent_target: Path, old_ma
    return safe_name(raw_name)


+def ensure_shadow_directory(path: Path) -> None:
+    path.mkdir(parents=True, exist_ok=True)
+    path.chmod(SHADOW_DIR_MODE)
+
+
 def mirror_directory(source: Path, target: Path, source_key: str, target_key: Path, old_map: dict[str, str], new_map: dict[str, str]) -> None:
-    target.mkdir(parents=True, exist_ok=True)
+    ensure_shadow_directory(target)
    used: set[str] = set()
    for child in sorted(source.iterdir(), key=lambda item: (item.name.casefold(), item.name)):
        if child.is_symlink():
@@ -116,7 +122,7 @@ def build(manifest: Path, destination: Path, state_file: Path) -> None:
    remove_tree(previous)
    if state_staging.exists():
        state_staging.unlink()
-    staging.mkdir(parents=True)
+    ensure_shadow_directory(staging)

    try:
        used_roots: set[str] = set()
--- a/runtime/reconcile-webdav.php
+++ b/runtime/reconcile-webdav.php
@@ -180,7 +180,7 @@ try
      {
        $path = trim((string)($root['webdav_path'] ?? ''), '/');
        $display = trim((string)($root['display_name'] ?? ''));
-        if ($path === '' || $display === '' || preg_match('/[\t\r\n]/', $path.$display)) fail_webdav_reconcile('Eine gespeicherte WebDAV-Wurzel ist ungueltig.');
+        if ($display === '' || preg_match('/[\t\r\n]/', $path.$display)) fail_webdav_reconcile('Eine gespeicherte WebDAV-Wurzel ist ungueltig.');
        $rootLines[] = $path."\t".$display;
      }
      file_put_contents($rootsPath, implode("\n", $rootLines)."\n", LOCK_EX);
--- a/runtime/repair-webdav-orphans.php
+++ b/runtime/repair-webdav-orphans.php
@@ -0,0 +1,101 @@
+#!/usr/bin/env php
+<?php
+if (PHP_SAPI !== 'cli')
+{
+  fwrite(STDERR, "CLI only\n");
+  exit(1);
+}
+
+$pluginRoot = dirname(__DIR__);
+$piwigoRoot = dirname($pluginRoot, 2);
+define('PHPWG_ROOT_PATH', rtrim($piwigoRoot, '/').'/');
+
+$_SERVER['REMOTE_ADDR'] = '127.0.0.1';
+$_SERVER['SERVER_ADDR'] = '127.0.0.1';
+$_SERVER['SERVER_NAME'] = 'localhost';
+$_SERVER['HTTP_HOST'] = 'localhost';
+$_SERVER['SERVER_PORT'] = '80';
+$_SERVER['REQUEST_METHOD'] = 'GET';
+$_SERVER['REQUEST_URI'] = '/';
+$_SERVER['SCRIPT_NAME'] = '/plugins/bratonien_tools/runtime/repair-webdav-orphans.php';
+$_SERVER['PHP_SELF'] = $_SERVER['SCRIPT_NAME'];
+$_SERVER['QUERY_STRING'] = '';
+$_SERVER['HTTPS'] = 'off';
+
+require_once(PHPWG_ROOT_PATH.'include/common.inc.php');
+require_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
+
+$stateRoot = '/var/lib/bratonien-tools/nc-connector';
+$marker = $stateRoot.'/.webdav-orphan-repair-0963.done';
+
+try
+{
+  if (is_file($marker))
+  {
+    echo "NC WebDAV Altlasten-Reparatur: bereits abgeschlossen.\n";
+    exit(0);
+  }
+
+  if (!is_dir($stateRoot) && !mkdir($stateRoot, 0750, true))
+  {
+    throw new RuntimeException('State-Verzeichnis konnte nicht angelegt werden: '.$stateRoot);
+  }
+
+  $relativePrefix = './_data/bratonien-tools/nc-webdav-gallery/connection-';
+  $absolutePrefix = rtrim(PHPWG_ROOT_PATH, '/').'/_data/bratonien-tools/nc-webdav-gallery/connection-';
+  $relativeLength = strlen($relativePrefix);
+  $absoluteLength = strlen($absolutePrefix);
+
+  $query = "SELECT id,path FROM ".IMAGES_TABLE.
+    " WHERE LEFT(path,".$relativeLength.")='".pwg_db_real_escape_string($relativePrefix)."'".
+    " OR LEFT(path,".$absoluteLength.")='".pwg_db_real_escape_string($absolutePrefix)."'";
+  $result = pwg_query($query);
+
+  $staleIds = array();
+  while ($row = pwg_db_fetch_assoc($result))
+  {
+    $id = (int)$row['id'];
+    $storedPath = (string)$row['path'];
+    if ($id < 1 || $storedPath === '') continue;
+
+    if (strpos($storedPath, $relativePrefix) === 0)
+    {
+      $filesystemPath = rtrim(PHPWG_ROOT_PATH, '/').'/'.ltrim(substr($storedPath, 2), '/');
+    }
+    elseif (strpos($storedPath, $absolutePrefix) === 0)
+    {
+      $filesystemPath = $storedPath;
+    }
+    else
+    {
+      continue;
+    }
+
+    if (!is_file($filesystemPath))
+    {
+      $staleIds[] = $id;
+    }
+  }
+
+  $staleIds = array_values(array_unique(array_map('intval', $staleIds)));
+  if ($staleIds)
+  {
+    delete_elements($staleIds, false);
+    invalidate_user_cache(true);
+  }
+
+  $payload = date('c').' removed='.count($staleIds)."\n";
+  if (file_put_contents($marker, $payload, LOCK_EX) === false)
+  {
+    throw new RuntimeException('Abschlussmarker konnte nicht geschrieben werden: '.$marker);
+  }
+  @chmod($marker, 0640);
+
+  echo 'NC WebDAV Altlasten-Reparatur: entfernte verwaiste Bilder='.count($staleIds)."\n";
+  exit(0);
+}
+catch (Throwable $e)
+{
+  fwrite(STDERR, 'NC WebDAV Altlasten-Reparatur: '.$e->getMessage()."\n");
+  exit(1);
+}
--- a/runtime/run-all.sh
+++ b/runtime/run-all.sh
@@ -10,6 +10,11 @@ if ! php "$SCRIPT_DIR/reconcile-webdav.php"; then
    exit 1
 fi

+if ! php "$SCRIPT_DIR/repair-webdav-orphans.php"; then
+    echo "NC Connector: verwaiste WebDAV-Bilddatensaetze konnten nicht repariert werden." >&2
+    exit 1
+fi
+
 if ! php "$SCRIPT_DIR/cleanup-webdav-piwigo.php"; then
    echo "NC Connector: Piwigo-Inhalte geloeschter WebDAV-Verbindungen konnten nicht bereinigt werden." >&2
    exit 1
--- a/runtime/sync-webdav.sh
+++ b/runtime/sync-webdav.sh
@@ -72,8 +72,10 @@ failure() {
 trap 'failure $? "$BASH_COMMAND" "$LINENO"' ERR

 ROOT_ARGS=()
-while IFS=$'\t' read -r path display_name; do
-    [[ -z "$path" || "$path" == \#* ]] && continue
+while IFS= read -r line; do
+    [[ -z "$line" || "$line" == \#* ]] && continue
+    [[ "$line" == *$'\t'* ]] || continue
+    path="${line%%$'\t'*}"
    ROOT_ARGS+=(--root "$path")
 done < "$WEBDAV_ROOTS_FILE"

--- a/template/nc_connector_admin.tpl
+++ b/template/nc_connector_admin.tpl
@@ -14,6 +14,10 @@
        <span class="bratonien-label">Nächster Lauf</span><strong data-nc-next-run>{if $nc_system_available}{$NC_CONNECTOR.system.next_run_label|escape:html}{else}Nicht verfügbar{/if}</strong>
      </div>
      {if $nc_system_available && $NC_CONNECTOR.system.last_run_message}<p class="bratonien-base-note">Letztes Ergebnis: <strong>{$NC_CONNECTOR.system.last_run_message|escape:html}</strong></p>{/if}
+      <form method="post" class="bratonien-actions" style="margin-top:.75rem">
+        <input type="hidden" name="pwg_token" value="{$PWG_TOKEN|escape:html}">
+        <button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_run_now"{if $NC_CONNECTOR.connection_count < 1} disabled{/if}>Jetzt abrufen</button>
+      </form>
      {if $nc_system_available && $NC_CONNECTOR.system.last_run_api_state == 'error'}<p class="bratonien-main-cache__warning"><strong>API:</strong> {$NC_CONNECTOR.system.last_run_api_message|escape:html}</p>{/if}
      {if $nc_system_available && $NC_CONNECTOR.system.last_run_fallback_state == 'error'}<p class="bratonien-main-cache__warning"><strong>Fallback:</strong> {$NC_CONNECTOR.system.last_run_fallback_message|escape:html}</p>{/if}
      {if $nc_system_available && $NC_CONNECTOR.system.last_run_error_detail}<details><summary>Technische Fehlerdetails</summary><p class="bratonien-main-cache__warning">{$NC_CONNECTOR.system.last_run_error_detail|escape:html}</p></details>{/if}
--- a/webdav-derivative-debug.php
+++ b/webdav-derivative-debug.php
@@ -0,0 +1,183 @@
+<?php
+define('PHPWG_ROOT_PATH', '../../');
+include_once(PHPWG_ROOT_PATH.'include/common.inc.php');
+
+if (!defined('BRATONIEN_TOOLS_PATH'))
+{
+  define('BRATONIEN_TOOLS_ID', basename(__DIR__));
+  define('BRATONIEN_TOOLS_PATH', PHPWG_ROOT_PATH.'plugins/'.BRATONIEN_TOOLS_ID.'/');
+}
+require_once(BRATONIEN_TOOLS_PATH.'include/webdav_image_runtime.inc.php');
+
+function bratonien_tools_webdav_debug_out($status, array $data)
+{
+  http_response_code((int)$status);
+  header('Content-Type: application/json; charset=utf-8');
+  header('Cache-Control: no-store');
+  echo json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
+  exit;
+}
+
+global $user;
+if (!isset($user['status']) || !in_array($user['status'], array('admin', 'webmaster'), true))
+{
+  bratonien_tools_webdav_debug_out(403, array('ok'=>false, 'stage'=>'auth', 'error'=>'Nur fuer Administratoren/Webmaster.'));
+}
+
+$image_id = (int)($_GET['id'] ?? 0);
+if ($image_id < 1)
+{
+  bratonien_tools_webdav_debug_out(400, array('ok'=>false, 'stage'=>'input', 'error'=>'Bild-ID fehlt.'));
+}
+
+$debug = array(
+  'ok'=>false,
+  'image_id'=>$image_id,
+  'stage'=>'start',
+);
+
+$result = pwg_query('SELECT id, path, coi FROM '.IMAGES_TABLE.' WHERE id='.$image_id.' LIMIT 1');
+if (!pwg_db_num_rows($result))
+{
+  $debug['stage'] = 'image-row';
+  $debug['error'] = 'Bild nicht gefunden.';
+  bratonien_tools_webdav_debug_out(404, $debug);
+}
+$row = pwg_db_fetch_assoc($result);
+$image_path = (string)($row['path'] ?? '');
+$debug['images_path'] = $image_path;
+
+$absolute = $image_path;
+if (strpos($absolute, '/') !== 0)
+{
+  $absolute = PHPWG_ROOT_PATH.ltrim(preg_replace('#^\./#', '', $absolute), '/');
+}
+$debug['absolute_path'] = $absolute;
+$debug['absolute_exists'] = file_exists($absolute);
+$debug['absolute_is_file'] = is_file($absolute);
+$debug['absolute_is_link'] = is_link($absolute);
+if (is_link($absolute))
+{
+  $debug['link_target'] = readlink($absolute);
+}
+
+$resolved = realpath($absolute);
+$debug['realpath'] = $resolved === false ? null : $resolved;
+if ($resolved === false)
+{
+  $debug['stage'] = 'realpath';
+  $debug['error'] = 'realpath() konnte images.path nicht aufloesen.';
+  bratonien_tools_webdav_debug_out(200, $debug);
+}
+
+$normalized = str_replace('\\', '/', $resolved);
+$debug['normalized_realpath'] = $normalized;
+
+$match = array();
+if (!preg_match('#/nc-webdav-source/connection-([0-9]+)/root-([0-9]+)/(.*)$#', $normalized, $match))
+{
+  $debug['stage'] = 'source-regex';
+  $debug['error'] = 'realpath passt nicht zum erwarteten nc-webdav-source-Schema.';
+  bratonien_tools_webdav_debug_out(200, $debug);
+}
+
+$connection_id = (int)$match[1];
+$root_fileid = (int)$match[2];
+$relative_path = trim((string)$match[3], '/');
+$debug['connection_id'] = $connection_id;
+$debug['root_fileid'] = $root_fileid;
+$debug['relative_path'] = $relative_path;
+
+$table = defined('BRATONIEN_TOOLS_NC_CONNECTIONS_TABLE')
+  ? BRATONIEN_TOOLS_NC_CONNECTIONS_TABLE
+  : $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
+$debug['connections_table'] = $table;
+
+$connection_result = pwg_query('SELECT id, enabled, adapter, config_json FROM `'.$table.'` WHERE id='.$connection_id.' LIMIT 1');
+if (!pwg_db_num_rows($connection_result))
+{
+  $debug['stage'] = 'connection-row';
+  $debug['error'] = 'Erkannte WebDAV-Verbindung existiert nicht in der Connector-Tabelle.';
+  bratonien_tools_webdav_debug_out(200, $debug);
+}
+$connection_row = pwg_db_fetch_assoc($connection_result);
+$debug['connection_enabled'] = (int)($connection_row['enabled'] ?? 0);
+$debug['connection_adapter'] = (string)($connection_row['adapter'] ?? '');
+
+$config = json_decode((string)($connection_row['config_json'] ?? ''), true);
+if (!is_array($config))
+{
+  $debug['stage'] = 'config-json';
+  $debug['error'] = 'config_json ist kein gueltiges JSON-Objekt.';
+  bratonien_tools_webdav_debug_out(200, $debug);
+}
+
+$debug['source_mode'] = (string)($config['source_mode'] ?? '');
+$debug['state_dir'] = (string)($config['state_dir'] ?? '');
+$debug['parallel_gallery_root'] = (string)($config['parallel_gallery_root'] ?? '');
+
+$roots = isset($config['roots']) && is_array($config['roots']) ? $config['roots'] : array();
+$debug['roots'] = array();
+$root_path = '';
+foreach ($roots as $root)
+{
+  $entry = array(
+    'fileid'=>(int)($root['fileid'] ?? 0),
+    'webdav_path'=>(string)($root['webdav_path'] ?? ''),
+    'display_name'=>(string)($root['display_name'] ?? ''),
+  );
+  $debug['roots'][] = $entry;
+  if ($entry['fileid'] === $root_fileid)
+  {
+    $root_path = trim($entry['webdav_path'], '/');
+  }
+}
+$debug['matched_root_path'] = $root_path;
+if ($debug['source_mode'] !== 'webdav-placeholder')
+{
+  $debug['stage'] = 'source-mode';
+  $debug['error'] = 'source_mode ist nicht webdav-placeholder.';
+  bratonien_tools_webdav_debug_out(200, $debug);
+}
+if ($root_path === '')
+{
+  $debug['stage'] = 'root-match';
+  $debug['error'] = 'root_fileid aus dem Dateipfad kommt in config.roots nicht vor.';
+  bratonien_tools_webdav_debug_out(200, $debug);
+}
+
+$mapping_file = rtrim((string)($config['state_dir'] ?? ''), '/').'/webdav-map.json';
+$debug['mapping_file'] = $mapping_file;
+$debug['mapping_readable'] = is_readable($mapping_file);
+$debug['mapping_has_resolved_key'] = false;
+$debug['mapping_has_normalized_key'] = false;
+$debug['mapping_entry'] = null;
+
+if (is_readable($mapping_file))
+{
+  $mapping = json_decode((string)file_get_contents($mapping_file), true);
+  if (is_array($mapping) && isset($mapping['files']) && is_array($mapping['files']))
+  {
+    $debug['mapping_has_resolved_key'] = array_key_exists($resolved, $mapping['files']);
+    $debug['mapping_has_normalized_key'] = array_key_exists($normalized, $mapping['files']);
+    $entry = $mapping['files'][$resolved] ?? $mapping['files'][$normalized] ?? null;
+    if (is_array($entry))
+    {
+      $debug['mapping_entry'] = $entry;
+    }
+  }
+  else
+  {
+    $debug['mapping_error'] = 'Mapping-Datei ist ungueltig oder enthaelt kein files-Objekt.';
+  }
+}
+
+$debug['runtime_source_info'] = bratonien_tools_webdav_image_source_info($image_id);
+$debug['stage'] = $debug['runtime_source_info'] ? 'ok' : 'runtime-source-info-null';
+$debug['ok'] = (bool)$debug['runtime_source_info'];
+if (!$debug['ok'])
+{
+  $debug['error'] = 'Die produktive Zuordnungsfunktion liefert trotz der obigen Zwischenergebnisse null.';
+}
+
+bratonien_tools_webdav_debug_out(200, $debug);
--- a/webdav-derivative-test.php
+++ b/webdav-derivative-test.php
@@ -0,0 +1,494 @@
+<?php
+define('PHPWG_ROOT_PATH', '../../');
+include_once(PHPWG_ROOT_PATH.'include/common.inc.php');
+require_once(PHPWG_ROOT_PATH.'include/derivative.inc.php');
+
+function bratonien_tools_webdav_derivative_test_abort($status, $message)
+{
+  http_response_code((int)$status);
+  header('Content-Type: text/plain; charset=utf-8');
+  header('Cache-Control: no-store');
+  echo $message;
+  exit;
+}
+
+function bratonien_tools_webdav_derivative_test_decrypt_secret($blob, $hex_key)
+{
+  $hex_key = trim((string)$hex_key);
+  if (!preg_match('/^[a-f0-9]{64}$/', $hex_key)) return null;
+
+  $outer = base64_decode(trim((string)$blob), true);
+  $payload = is_string($outer) ? json_decode($outer, true) : null;
+  if (!is_array($payload) || (int)($payload['v'] ?? 0) !== 1) return null;
+
+  $iv = base64_decode((string)($payload['iv'] ?? ''), true);
+  $tag = base64_decode((string)($payload['tag'] ?? ''), true);
+  $cipher = base64_decode((string)($payload['data'] ?? ''), true);
+  if (!is_string($iv) || !is_string($tag) || !is_string($cipher)) return null;
+
+  $plain = openssl_decrypt($cipher, 'aes-256-gcm', hex2bin($hex_key), OPENSSL_RAW_DATA, $iv, $tag);
+  if ($plain === false) return null;
+
+  $decoded = json_decode((string)$plain, true);
+  return is_array($decoded) ? $decoded : null;
+}
+
+function bratonien_tools_webdav_derivative_test_quote_path($path)
+{
+  $parts = array_values(array_filter(explode('/', trim((string)$path, '/')), 'strlen'));
+  return implode('/', array_map('rawurlencode', $parts));
+}
+
+function bratonien_tools_webdav_derivative_test_source_info($image_id, array $image_row)
+{
+  $image_id = (int)$image_id;
+  $path = (string)($image_row['path'] ?? '');
+  if ($image_id < 1 || $path === '') return null;
+
+  $absolute = $path;
+  if (strpos($absolute, '/') !== 0)
+  {
+    $absolute = PHPWG_ROOT_PATH.ltrim(preg_replace('#^\\./#', '', $absolute), '/');
+  }
+
+  $resolved = realpath($absolute);
+  if ($resolved === false) return null;
+
+  $normalized = str_replace('\\', '/', $resolved);
+  if (!preg_match('#/nc-webdav-source/connection-([0-9]+)/root-([0-9]+)/(.*)$#', $normalized, $match))
+  {
+    return null;
+  }
+
+  $connection_id = (int)$match[1];
+  $root_fileid = (int)$match[2];
+  $relative_path = trim((string)$match[3], '/');
+  if ($connection_id < 1 || $root_fileid < 1 || $relative_path === '') return null;
+
+  $table = $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
+  $connection_result = pwg_query('SELECT config_json FROM `'.$table.'` WHERE id='.$connection_id.' LIMIT 1');
+  if (!pwg_db_num_rows($connection_result)) return null;
+
+  $connection_row = pwg_db_fetch_assoc($connection_result);
+  $config = json_decode((string)$connection_row['config_json'], true);
+  if (!is_array($config) || (string)($config['source_mode'] ?? '') !== 'webdav-placeholder') return null;
+
+  $root_found = false;
+  $root_path = '';
+  $roots = isset($config['roots']) && is_array($config['roots']) ? $config['roots'] : array();
+  foreach ($roots as $root)
+  {
+    if ((int)($root['fileid'] ?? 0) === $root_fileid)
+    {
+      $root_found = true;
+      $root_path = trim((string)($root['webdav_path'] ?? ''), '/');
+      break;
+    }
+  }
+  if (!$root_found) return null;
+
+  $webdav_path = trim($root_path === '' ? $relative_path : $root_path.'/'.$relative_path, '/');
+  if ($webdav_path === '') return null;
+
+  $content_type = '';
+  $size = 0;
+  $etag = '';
+  $state_dir = rtrim((string)($config['state_dir'] ?? ''), '/');
+  if ($state_dir !== '')
+  {
+    $mapping_file = $state_dir.'/webdav-map.json';
+    if (is_readable($mapping_file))
+    {
+      $mapping = json_decode((string)file_get_contents($mapping_file), true);
+      if (is_array($mapping) && isset($mapping['files']) && is_array($mapping['files']))
+      {
+        $entry = $mapping['files'][$resolved] ?? $mapping['files'][$normalized] ?? null;
+        if (is_array($entry) && (string)($entry['kind'] ?? '') === 'file')
+        {
+          $webdav_path = trim((string)($entry['webdav_path'] ?? $webdav_path), '/');
+          $content_type = (string)($entry['content_type'] ?? '');
+          $size = (int)($entry['size'] ?? 0);
+          $etag = (string)($entry['etag'] ?? '');
+        }
+      }
+    }
+  }
+
+  return array(
+    'image_id'=>$image_id,
+    'connection_id'=>$connection_id,
+    'webdav_path'=>$webdav_path,
+    'content_type'=>$content_type,
+    'size'=>$size,
+    'etag'=>$etag,
+    'coi'=>$image_row['coi'] ?? null,
+  );
+}
+
+function bratonien_tools_webdav_derivative_test_download(array $source, $destination, &$detail=null)
+{
+  $detail = '';
+  $table = $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
+  $result = pwg_query('SELECT config_json, secret_blob FROM `'.$table.'` WHERE id='.(int)$source['connection_id'].' LIMIT 1');
+  if (!pwg_db_num_rows($result))
+  {
+    $detail = 'WebDAV-Verbindung nicht gefunden.';
+    return false;
+  }
+
+  $row = pwg_db_fetch_assoc($result);
+  $config = json_decode((string)$row['config_json'], true);
+  if (!is_array($config))
+  {
+    $detail = 'WebDAV-Konfiguration ist ungueltig.';
+    return false;
+  }
+
+  $key_result = pwg_query("SELECT value FROM ".$GLOBALS['prefixeTable']."config WHERE param='bratonien_nc_connector_secret' LIMIT 1");
+  if (!pwg_db_num_rows($key_result))
+  {
+    $detail = 'Connector-Schluessel fehlt.';
+    return false;
+  }
+
+  $key_row = pwg_db_fetch_assoc($key_result);
+  $credentials = bratonien_tools_webdav_derivative_test_decrypt_secret((string)$row['secret_blob'], (string)$key_row['value']);
+  if (!is_array($credentials))
+  {
+    $detail = 'WebDAV-Zugangsdaten konnten nicht gelesen werden.';
+    return false;
+  }
+
+  $base_url = rtrim((string)($config['nextcloud_url'] ?? ''), '/');
+  $user = trim((string)($credentials['nextcloud_user'] ?? ''));
+  $password = (string)($credentials['nextcloud_password'] ?? '');
+  $webdav_path = trim((string)($source['webdav_path'] ?? ''), '/');
+  if ($base_url === '' || $user === '' || $password === '' || $webdav_path === '')
+  {
+    $detail = 'WebDAV-Bildquelle ist unvollstaendig.';
+    return false;
+  }
+
+  $fp = @fopen($destination, 'xb');
+  if (!$fp)
+  {
+    $detail = 'Temporaere Quelldatei konnte nicht angelegt werden.';
+    return false;
+  }
+
+  $url = $base_url.'/remote.php/dav/files/'.rawurlencode($user).'/'.bratonien_tools_webdav_derivative_test_quote_path($webdav_path);
+  $ch = curl_init($url);
+  curl_setopt_array($ch, array(
+    CURLOPT_FOLLOWLOCATION => false,
+    CURLOPT_CONNECTTIMEOUT => 10,
+    CURLOPT_TIMEOUT => 180,
+    CURLOPT_HTTPAUTH => CURLAUTH_BASIC,
+    CURLOPT_USERPWD => $user.':'.$password,
+    CURLOPT_RETURNTRANSFER => false,
+    CURLOPT_FAILONERROR => false,
+    CURLOPT_FILE => $fp,
+    CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Derivative-Parallel-Test',
+  ));
+
+  $ok = curl_exec($ch);
+  $errno = curl_errno($ch);
+  $error = curl_error($ch);
+  $http = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+  curl_close($ch);
+  fclose($fp);
+
+  if ($ok === false || $errno !== 0 || $http < 200 || $http >= 300)
+  {
+    @unlink($destination);
+    $detail = 'Nextcloud-Download fehlgeschlagen (HTTP '.$http.', cURL '.$errno.($error !== '' ? ': '.$error : '').').';
+    return false;
+  }
+
+  if (!is_file($destination) || filesize($destination) < 1 || @getimagesize($destination) === false)
+  {
+    @unlink($destination);
+    $detail = 'Nextcloud-Datei ist kein lesbares Bild.';
+    return false;
+  }
+
+  return true;
+}
+
+function bratonien_tools_webdav_derivative_test_inner_url($derivative_path)
+{
+  $derivative_root = PHPWG_ROOT_PATH.PWG_DERIVATIVE_DIR;
+  if (strpos($derivative_path, $derivative_root) !== 0) return null;
+
+  $location = ltrim(substr($derivative_path, strlen($derivative_root)), '/');
+  if ($location === '') return null;
+
+  $segments = array_map('rawurlencode', explode('/', $location));
+  return rtrim(get_absolute_root_url(), '/').'/i.php?/'.implode('/', $segments);
+}
+
+function bratonien_tools_webdav_derivative_test_call_i($url, &$response_body, &$response_type, &$response_status, &$detail=null)
+{
+  $detail = '';
+  $response_body = '';
+  $response_type = 'application/octet-stream';
+  $response_status = 500;
+
+  $ch = curl_init($url);
+  curl_setopt_array($ch, array(
+    CURLOPT_FOLLOWLOCATION => false,
+    CURLOPT_CONNECTTIMEOUT => 10,
+    CURLOPT_TIMEOUT => 180,
+    CURLOPT_RETURNTRANSFER => true,
+    CURLOPT_FAILONERROR => false,
+    CURLOPT_USERAGENT => 'Bratonien-Tools-Derivative-Parallel-Gate',
+  ));
+
+  $body = curl_exec($ch);
+  $errno = curl_errno($ch);
+  $error = curl_error($ch);
+  $status = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+  $content_type = (string)curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
+  curl_close($ch);
+
+  $response_status = $status;
+  if ($content_type !== '') $response_type = $content_type;
+  if (is_string($body)) $response_body = $body;
+
+  if ($body === false || $errno !== 0)
+  {
+    $detail = 'Interner i.php-Aufruf fehlgeschlagen (cURL '.$errno.($error !== '' ? ': '.$error : '').').';
+    return false;
+  }
+  if ($status < 200 || $status >= 400)
+  {
+    $detail = 'i.php antwortete mit HTTP '.$status.'.';
+    return false;
+  }
+
+  return true;
+}
+
+global $user;
+if (!isset($user['status']) || !in_array($user['status'], array('admin', 'webmaster'), true))
+{
+  bratonien_tools_webdav_derivative_test_abort(403, 'Dieser Test-Endpunkt ist nur fuer Administratoren verfuegbar.');
+}
+
+$metrics_requested = isset($_GET['metrics']) && (string)$_GET['metrics'] === '1';
+$metrics_started_at = microtime(true);
+$memory_start = memory_get_usage(true);
+if (function_exists('memory_reset_peak_usage'))
+{
+  memory_reset_peak_usage();
+}
+
+$image_id = (int)($_GET['id'] ?? 0);
+if ($image_id < 1)
+{
+  bratonien_tools_webdav_derivative_test_abort(400, 'Bild-ID fehlt.');
+}
+
+$type = trim((string)($_GET['type'] ?? IMG_THUMB));
+$defined = ImageStdParams::get_defined_type_map();
+if (!isset($defined[$type]))
+{
+  bratonien_tools_webdav_derivative_test_abort(400, 'Unbekannter oder deaktivierter Derivat-Typ: '.$type);
+}
+
+$result = pwg_query('SELECT * FROM '.IMAGES_TABLE.' WHERE id='.$image_id.' LIMIT 1');
+if (!pwg_db_num_rows($result))
+{
+  bratonien_tools_webdav_derivative_test_abort(404, 'Bild nicht gefunden.');
+}
+$image_row = pwg_db_fetch_assoc($result);
+
+$source = bratonien_tools_webdav_derivative_test_source_info($image_id, $image_row);
+if (!$source)
+{
+  bratonien_tools_webdav_derivative_test_abort(404, 'Keine WebDAV-Quelle fuer dieses Bild gefunden.');
+}
+
+$upload_dir = rtrim((string)($GLOBALS['conf']['upload_dir'] ?? './upload'), '/');
+$test_rel_dir = $upload_dir.'/bratonien-webdav-test';
+$test_root = PHPWG_ROOT_PATH.$test_rel_dir;
+if (!is_dir($test_root) && !@mkdir($test_root, 0755, true))
+{
+  bratonien_tools_webdav_derivative_test_abort(500, 'Paralleler Testbereich konnte nicht angelegt werden: '.$test_root);
+}
+if (!is_writable($test_root))
+{
+  bratonien_tools_webdav_derivative_test_abort(500, 'Paralleler Testbereich ist fuer PHP nicht beschreibbar: '.$test_root);
+}
+
+$lock_path = $test_root.'/image-'.$image_id.'.lock';
+$lock = @fopen($lock_path, 'c');
+if (!$lock || !flock($lock, LOCK_EX))
+{
+  if ($lock) fclose($lock);
+  bratonien_tools_webdav_derivative_test_abort(503, 'Paralleler Test-Lock konnte nicht gesetzt werden.');
+}
+
+$extension = strtolower(pathinfo((string)($image_row['path'] ?? ''), PATHINFO_EXTENSION));
+if (!in_array($extension, array('jpg', 'jpeg', 'png', 'gif', 'webp'), true))
+{
+  $extension = 'jpg';
+}
+
+$token = getmypid().'-'.bin2hex(random_bytes(6));
+$source_filename = 'source-'.$image_id.'-'.$token.'.'.$extension;
+$source_path = $test_root.'/'.$source_filename;
+$source_rel = $test_rel_dir.'/'.$source_filename;
+$temp_image_id = 0;
+$derivative_path = '';
+$cleaned = false;
+
+$cleanup = function() use (&$cleaned, &$temp_image_id, &$derivative_path, $source_path, $lock)
+{
+  if ($cleaned) return;
+  $cleaned = true;
+
+  if ($temp_image_id > 0)
+  {
+    @pwg_query('DELETE FROM '.IMAGES_TABLE.' WHERE id='.(int)$temp_image_id.' LIMIT 1');
+    $temp_image_id = 0;
+  }
+
+  if ($derivative_path !== '' && is_file($derivative_path))
+  {
+    @unlink($derivative_path);
+  }
+
+  if (is_file($source_path))
+  {
+    @unlink($source_path);
+  }
+
+  @flock($lock, LOCK_UN);
+  @fclose($lock);
+};
+register_shutdown_function($cleanup);
+
+try
+{
+  $detail = '';
+  if (!bratonien_tools_webdav_derivative_test_download($source, $source_path, $detail))
+  {
+    bratonien_tools_webdav_derivative_test_abort(502, $detail);
+  }
+
+  $source_bytes = (int)filesize($source_path);
+
+  $dimensions = @getimagesize($source_path);
+  if (!is_array($dimensions) || empty($dimensions[0]) || empty($dimensions[1]))
+  {
+    bratonien_tools_webdav_derivative_test_abort(500, 'Paralleles Original besitzt keine gueltigen Bildabmessungen.');
+  }
+
+  $test_row = $image_row;
+  unset($test_row['id']);
+  $test_row['path'] = $source_rel;
+  $test_row['file'] = $source_filename;
+  if (array_key_exists('width', $test_row)) $test_row['width'] = (int)$dimensions[0];
+  if (array_key_exists('height', $test_row)) $test_row['height'] = (int)$dimensions[1];
+
+  single_insert(IMAGES_TABLE, $test_row);
+  $temp_image_id = (int)pwg_db_insert_id();
+  if ($temp_image_id < 1)
+  {
+    bratonien_tools_webdav_derivative_test_abort(500, 'Temporaerer Piwigo-Testeintrag konnte nicht angelegt werden.');
+  }
+
+  $test_row['id'] = $temp_image_id;
+  $test_src = new SrcImage($test_row);
+  $derivative = new DerivativeImage($defined[$type], $test_src);
+  if ($derivative->same_as_source())
+  {
+    bratonien_tools_webdav_derivative_test_abort(409, 'Dieser Typ ist fuer das parallele Testbild identisch mit der Quelle.');
+  }
+
+  $derivative_path = $derivative->get_path();
+  if ($derivative_path === '')
+  {
+    bratonien_tools_webdav_derivative_test_abort(500, 'Piwigo konnte keinen Derivat-Zielpfad fuer den parallelen Test bestimmen.');
+  }
+
+  if (is_file($derivative_path))
+  {
+    @unlink($derivative_path);
+    clearstatcache(true, $derivative_path);
+  }
+
+  $inner_url = bratonien_tools_webdav_derivative_test_inner_url($derivative_path);
+  if ($inner_url === null)
+  {
+    bratonien_tools_webdav_derivative_test_abort(500, 'Piwigo-i.php-URL konnte fuer den parallelen Test nicht bestimmt werden.');
+  }
+
+  $body = '';
+  $content_type = 'application/octet-stream';
+  $status = 500;
+  if (!bratonien_tools_webdav_derivative_test_call_i($inner_url, $body, $content_type, $status, $detail))
+  {
+    bratonien_tools_webdav_derivative_test_abort(502, $detail."\n".$body);
+  }
+
+  clearstatcache(true, $derivative_path);
+  if (!is_file($derivative_path) || !is_readable($derivative_path))
+  {
+    bratonien_tools_webdav_derivative_test_abort(
+      500,
+      "i.php antwortete, aber das parallele Piwigo-Derivat wurde nicht erzeugt.\n"
+      .'Testquelle: '.$source_rel."\n"
+      .'i.php: '.$inner_url
+    );
+  }
+
+  $derivative_size = @getimagesize($derivative_path);
+  if (!is_array($derivative_size) || empty($derivative_size[0]) || empty($derivative_size[1]))
+  {
+    bratonien_tools_webdav_derivative_test_abort(500, 'Das von i.php erzeugte parallele Derivat ist keine lesbare Bilddatei.');
+  }
+
+  $generated_width = (int)$derivative_size[0];
+  $generated_height = (int)$derivative_size[1];
+  $derivative_bytes = (int)filesize($derivative_path);
+
+  $cleanup();
+
+  $elapsed_ms = round((microtime(true) - $metrics_started_at) * 1000, 2);
+  $memory_peak = memory_get_peak_usage(true);
+  $memory_delta_peak = max(0, $memory_peak - $memory_start);
+
+  if ($metrics_requested)
+  {
+    header('Content-Type: application/json; charset=utf-8');
+    header('Cache-Control: no-store');
+    echo json_encode(array(
+      'source_bytes'=>$source_bytes,
+      'derivative_bytes'=>$derivative_bytes,
+      'elapsed_ms'=>$elapsed_ms,
+      'memory_start_bytes'=>$memory_start,
+      'memory_peak_bytes'=>$memory_peak,
+      'memory_delta_peak_bytes'=>$memory_delta_peak,
+    ), JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
+    exit;
+  }
+
+  header('X-Bratonien-WebDAV-Test: parallel-i.php-success');
+  header('X-Bratonien-Resource-Source-Bytes: '.$source_bytes);
+  header('X-Bratonien-Resource-Derivative-Bytes: '.$derivative_bytes);
+  header('X-Bratonien-Resource-Elapsed-Ms: '.$elapsed_ms);
+  header('X-Bratonien-Resource-Memory-Start-Bytes: '.$memory_start);
+  header('X-Bratonien-Resource-Memory-Peak-Bytes: '.$memory_peak);
+  header('X-Bratonien-Resource-Memory-Delta-Peak-Bytes: '.$memory_delta_peak);
+  header('X-Bratonien-WebDAV-Test-Size: '.$generated_width.'x'.$generated_height);
+  header('Content-Type: '.$content_type);
+  header('Content-Length: '.strlen($body));
+  header('Cache-Control: no-store');
+  http_response_code($status);
+  echo $body;
+}
+finally
+{
+  $cleanup();
+}
--- a/webdav-derivative.php
+++ b/webdav-derivative.php
@@ -0,0 +1,368 @@
+<?php
+define('PHPWG_ROOT_PATH', '../../');
+include_once(PHPWG_ROOT_PATH.'include/common.inc.php');
+require_once(PHPWG_ROOT_PATH.'include/derivative.inc.php');
+
+if (!defined('BRATONIEN_TOOLS_PATH'))
+{
+  define('BRATONIEN_TOOLS_ID', basename(__DIR__));
+  define('BRATONIEN_TOOLS_PATH', PHPWG_ROOT_PATH.'plugins/'.BRATONIEN_TOOLS_ID.'/');
+}
+require_once(BRATONIEN_TOOLS_PATH.'include/webdav_materialize_runtime.inc.php');
+
+function bratonien_tools_webdav_derivative_debug($request_id, $event, array $fields=array())
+{
+  $parts = array('[BRAT-WD '.$request_id.']', $event);
+  foreach ($fields as $key => $value)
+  {
+    if (is_bool($value)) $value = $value ? '1' : '0';
+    elseif ($value === null) $value = 'NULL';
+    elseif (is_array($value) || is_object($value)) $value = json_encode($value);
+    $parts[] = $key.'='.str_replace(array("\r", "\n"), array('\\r', '\\n'), (string)$value);
+  }
+  error_log(implode(' ', $parts));
+}
+
+function bratonien_tools_webdav_derivative_abort($status, $message)
+{
+  http_response_code((int)$status);
+  header('Content-Type: text/plain; charset=utf-8');
+  header('Cache-Control: no-store');
+  echo $message;
+  exit;
+}
+
+function bratonien_tools_webdav_derivative_decrypt_secret($blob, $hex_key)
+{
+  $hex_key = trim((string)$hex_key);
+  if (!preg_match('/^[a-f0-9]{64}$/', $hex_key)) return null;
+  $outer = base64_decode(trim((string)$blob), true);
+  $payload = is_string($outer) ? json_decode($outer, true) : null;
+  if (!is_array($payload) || (int)($payload['v'] ?? 0) !== 1) return null;
+  $iv = base64_decode((string)($payload['iv'] ?? ''), true);
+  $tag = base64_decode((string)($payload['tag'] ?? ''), true);
+  $cipher = base64_decode((string)($payload['data'] ?? ''), true);
+  if (!is_string($iv) || !is_string($tag) || !is_string($cipher)) return null;
+  $plain = openssl_decrypt($cipher, 'aes-256-gcm', hex2bin($hex_key), OPENSSL_RAW_DATA, $iv, $tag);
+  if ($plain === false) return null;
+  $decoded = json_decode((string)$plain, true);
+  return is_array($decoded) ? $decoded : null;
+}
+
+function bratonien_tools_webdav_derivative_quote_path($path)
+{
+  $parts = array_values(array_filter(explode('/', trim((string)$path, '/')), 'strlen'));
+  return implode('/', array_map('rawurlencode', $parts));
+}
+
+function bratonien_tools_webdav_derivative_download(array $source, $destination, &$detail=null)
+{
+  $detail = '';
+  $table = $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
+  $result = pwg_query('SELECT config_json, secret_blob FROM `'.$table.'` WHERE id='.(int)$source['connection_id'].' LIMIT 1');
+  if (!pwg_db_num_rows($result)) { $detail = 'WebDAV-Verbindung nicht gefunden.'; return false; }
+  $row = pwg_db_fetch_assoc($result);
+  $config = json_decode((string)$row['config_json'], true);
+  if (!is_array($config)) { $detail = 'WebDAV-Konfiguration ist ungueltig.'; return false; }
+  $key_result = pwg_query("SELECT value FROM ".$GLOBALS['prefixeTable']."config WHERE param='bratonien_nc_connector_secret' LIMIT 1");
+  if (!pwg_db_num_rows($key_result)) { $detail = 'Connector-Schluessel fehlt.'; return false; }
+  $key_row = pwg_db_fetch_assoc($key_result);
+  $credentials = bratonien_tools_webdav_derivative_decrypt_secret((string)$row['secret_blob'], (string)$key_row['value']);
+  if (!is_array($credentials)) { $detail = 'WebDAV-Zugangsdaten konnten nicht gelesen werden.'; return false; }
+
+  $base_url = rtrim((string)($config['nextcloud_url'] ?? ''), '/');
+  $user = trim((string)($credentials['nextcloud_user'] ?? ''));
+  $password = (string)($credentials['nextcloud_password'] ?? '');
+  $webdav_path = trim((string)($source['webdav_path'] ?? ''), '/');
+  if ($base_url === '' || $user === '' || $password === '' || $webdav_path === '') { $detail = 'WebDAV-Bildquelle ist unvollstaendig.'; return false; }
+
+  $fp = @fopen($destination, 'xb');
+  if (!$fp) { $detail = 'Temporaere Quelldatei konnte nicht angelegt werden.'; return false; }
+
+  $url = $base_url.'/remote.php/dav/files/'.rawurlencode($user).'/'.bratonien_tools_webdav_derivative_quote_path($webdav_path);
+  $ch = curl_init($url);
+  curl_setopt_array($ch, array(
+    CURLOPT_FOLLOWLOCATION => false,
+    CURLOPT_CONNECTTIMEOUT => 10,
+    CURLOPT_TIMEOUT => 180,
+    CURLOPT_HTTPAUTH => CURLAUTH_BASIC,
+    CURLOPT_USERPWD => $user.':'.$password,
+    CURLOPT_RETURNTRANSFER => false,
+    CURLOPT_FAILONERROR => false,
+    CURLOPT_FILE => $fp,
+    CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Materialize',
+  ));
+  $ok = curl_exec($ch);
+  $errno = curl_errno($ch);
+  $error = curl_error($ch);
+  $http = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+  curl_close($ch);
+  fclose($fp);
+  if ($ok === false || $errno !== 0 || $http < 200 || $http >= 300)
+  {
+    @unlink($destination);
+    $detail = 'Nextcloud-Download fehlgeschlagen (HTTP '.$http.', cURL '.$errno.($error !== '' ? ': '.$error : '').').';
+    return false;
+  }
+  if (!is_file($destination) || filesize($destination) < 1 || @getimagesize($destination) === false)
+  {
+    @unlink($destination);
+    $detail = 'Nextcloud-Datei ist kein lesbares Bild.';
+    return false;
+  }
+  return true;
+}
+
+function bratonien_tools_webdav_derivative_inner_url($derivative_path)
+{
+  $derivative_root = PHPWG_ROOT_PATH.PWG_DERIVATIVE_DIR;
+  if (strpos($derivative_path, $derivative_root) !== 0) return null;
+  $location = ltrim(substr($derivative_path, strlen($derivative_root)), '/');
+  if ($location === '') return null;
+  $segments = array_map('rawurlencode', explode('/', $location));
+  return rtrim(get_absolute_root_url(), '/').'/i.php?/'.implode('/', $segments);
+}
+
+function bratonien_tools_webdav_derivative_call_i($url, &$status, &$detail=null)
+{
+  $detail = '';
+  $status = 500;
+  $ch = curl_init($url);
+  curl_setopt_array($ch, array(
+    CURLOPT_FOLLOWLOCATION => false,
+    CURLOPT_CONNECTTIMEOUT => 10,
+    CURLOPT_TIMEOUT => 180,
+    CURLOPT_RETURNTRANSFER => false,
+    CURLOPT_FAILONERROR => false,
+    CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Materialize-Gate',
+    CURLOPT_WRITEFUNCTION => function($ch, $data) { return strlen($data); },
+  ));
+  $ok = curl_exec($ch);
+  $errno = curl_errno($ch);
+  $error = curl_error($ch);
+  $status = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+  curl_close($ch);
+  if ($ok === false || $errno !== 0) { $detail = 'Interner i.php-Aufruf fehlgeschlagen (cURL '.$errno.($error !== '' ? ': '.$error : '').').'; return false; }
+  if ($status < 200 || $status >= 400) { $detail = 'i.php antwortete mit HTTP '.$status.'.'; return false; }
+  return true;
+}
+
+function bratonien_tools_webdav_derivative_after_url($encoded)
+{
+  $encoded = trim((string)$encoded);
+  if ($encoded === '') return null;
+  $raw = strtr($encoded, '-_', '+/');
+  $padding = strlen($raw) % 4;
+  if ($padding) $raw .= str_repeat('=', 4 - $padding);
+  $url = base64_decode($raw, true);
+  if (!is_string($url) || $url === '' || preg_match('/[\r\n]/', $url)) return null;
+  if (strpos($url, '//') === 0) return null;
+  if (preg_match('#^https?://#i', $url))
+  {
+    $root_parts = parse_url(get_absolute_root_url());
+    $url_parts = parse_url($url);
+    if (!is_array($root_parts) || !is_array($url_parts)) return null;
+    if (strcasecmp((string)($root_parts['scheme'] ?? ''), (string)($url_parts['scheme'] ?? '')) !== 0) return null;
+    if (strcasecmp((string)($root_parts['host'] ?? ''), (string)($url_parts['host'] ?? '')) !== 0) return null;
+    if ((int)($root_parts['port'] ?? 0) !== (int)($url_parts['port'] ?? 0)) return null;
+    return $url;
+  }
+  if (strpos($url, ':') !== false && !preg_match('#^[A-Za-z0-9_./?&=%+-]+$#', $url)) return null;
+  return $url;
+}
+
+function bratonien_tools_webdav_derivative_needs_after_redirect($url)
+{
+  if (!is_string($url) || $url === '') return false;
+  return strpos($url, '/plugins/'.BRATONIEN_TOOLS_ID.'/watermark.php') !== false
+    || strpos($url, 'plugins/'.BRATONIEN_TOOLS_ID.'/watermark.php') === 0;
+}
+
+function bratonien_tools_webdav_derivative_serve($path)
+{
+  clearstatcache(true, $path);
+  if (!is_file($path) || !is_readable($path)) bratonien_tools_webdav_derivative_abort(500, 'Piwigo-Derivat ist nicht lesbar.');
+  $size = @getimagesize($path);
+  $content_type = is_array($size) && !empty($size['mime']) ? (string)$size['mime'] : 'application/octet-stream';
+  header('Content-Type: '.$content_type);
+  header('Content-Length: '.(int)filesize($path));
+  header('Cache-Control: public, max-age=31536000');
+  header('X-Content-Type-Options: nosniff');
+  if (($_SERVER['REQUEST_METHOD'] ?? 'GET') !== 'HEAD') readfile($path);
+  exit;
+}
+
+$image_id = (int)($_GET['id'] ?? 0);
+$variant = trim((string)($_GET['variant'] ?? ''));
+$request_id = bin2hex(random_bytes(4));
+bratonien_tools_webdav_derivative_debug($request_id, 'start', array('image_id'=>$image_id, 'variant'=>$variant));
+
+$after_url = bratonien_tools_webdav_derivative_after_url($_GET['after'] ?? '');
+$after_sig = trim((string)($_GET['sig'] ?? ''));
+if ($image_id < 1) bratonien_tools_webdav_derivative_abort(400, 'Bild-ID fehlt.');
+if ($variant === '') bratonien_tools_webdav_derivative_abort(400, 'Derivat-Variante fehlt.');
+if ($after_url !== null)
+{
+  $expected_sig = bratonien_tools_webdav_materialize_after_signature($image_id, $variant, $after_url);
+  if ($after_sig === '' || !hash_equals($expected_sig, $after_sig)) $after_url = null;
+}
+$redirect_after = bratonien_tools_webdav_derivative_needs_after_redirect($after_url) ? $after_url : null;
+
+$permission_condition = get_sql_condition_FandF(array('forbidden_categories'=>'category_id'), null, true);
+$access_result = pwg_query('SELECT 1 FROM '.IMAGE_CATEGORY_TABLE.' WHERE image_id='.$image_id.' AND '.$permission_condition.' LIMIT 1');
+if (!pwg_db_num_rows($access_result)) bratonien_tools_webdav_derivative_abort(403, 'Kein Zugriff auf dieses Bild.');
+$result = pwg_query('SELECT * FROM '.IMAGES_TABLE.' WHERE id='.$image_id.' LIMIT 1');
+if (!pwg_db_num_rows($result)) bratonien_tools_webdav_derivative_abort(404, 'Bild nicht gefunden.');
+$image_row = pwg_db_fetch_assoc($result);
+
+$raw_source_path = (string)($image_row['path'] ?? '');
+$absolute_source_path = $raw_source_path;
+if ($absolute_source_path !== '' && strpos($absolute_source_path, '/') !== 0)
+{
+  $absolute_source_path = PHPWG_ROOT_PATH.ltrim(preg_replace('#^\./#', '', $absolute_source_path), '/');
+}
+bratonien_tools_webdav_derivative_debug($request_id, 'source_before_resolve', array(
+  'path'=>$raw_source_path,
+  'is_link'=>$absolute_source_path !== '' && is_link($absolute_source_path),
+  'realpath'=>$absolute_source_path !== '' ? (realpath($absolute_source_path) ?: 'FALSE') : 'EMPTY',
+));
+
+$source = bratonien_tools_webdav_materialize_source_info($image_id);
+if (!$source)
+{
+  bratonien_tools_webdav_derivative_debug($request_id, 'source_resolve_failed');
+  bratonien_tools_webdav_derivative_abort(404, 'Keine WebDAV-Quelle fuer dieses Bild gefunden.');
+}
+bratonien_tools_webdav_derivative_debug($request_id, 'source_resolved', array('connection_id'=>$source['connection_id'] ?? 0, 'root_fileid'=>$source['root_fileid'] ?? 0, 'webdav_path'=>$source['webdav_path'] ?? ''));
+
+$params = bratonien_tools_webdav_materialize_params_from_variant($variant);
+if (!$params) bratonien_tools_webdav_derivative_abort(400, 'Unbekannte Derivat-Variante.');
+$real_src = new SrcImage($image_row);
+$real_derivative = new DerivativeImage($params, $real_src);
+if ($real_derivative->same_as_source())
+{
+  $source_url = bratonien_tools_webdav_materialize_image_url($image_id);
+  if (!$source_url) bratonien_tools_webdav_derivative_abort(404, 'WebDAV-Original konnte nicht bestimmt werden.');
+  header('Location: '.$source_url, true, 302);
+  exit;
+}
+
+$target_path = $real_derivative->get_path();
+$derivative_root = PHPWG_ROOT_PATH.PWG_DERIVATIVE_DIR;
+if ($target_path === '' || strpos($target_path, $derivative_root) !== 0) bratonien_tools_webdav_derivative_abort(500, 'Ungueltiger Piwigo-Derivatpfad.');
+if (is_file($target_path) && is_readable($target_path))
+{
+  bratonien_tools_webdav_derivative_debug($request_id, 'target_exists', array('target'=>$target_path));
+  if ($redirect_after !== null) { header('Location: '.$redirect_after, true, 302); exit; }
+  bratonien_tools_webdav_derivative_serve($target_path);
+}
+
+$shadow_path = $raw_source_path;
+if ($shadow_path === '') bratonien_tools_webdav_derivative_abort(500, 'Piwigo-Quellpfad fehlt.');
+if (strpos($shadow_path, '/') !== 0) $shadow_path = PHPWG_ROOT_PATH.ltrim(preg_replace('#^\./#', '', $shadow_path), '/');
+$shadow_normalized = str_replace('\\', '/', $shadow_path);
+if (!preg_match('#/_data/bratonien-tools/nc-webdav-gallery/connection-'.(int)$source['connection_id'].'/#', $shadow_normalized)) bratonien_tools_webdav_derivative_abort(500, 'Piwigo-Quellpfad liegt nicht im WebDAV-Shadow-Baum.');
+if (!is_link($shadow_path)) bratonien_tools_webdav_derivative_abort(500, 'WebDAV-Shadow-Quelle ist kein Placeholder-Symlink.');
+
+$placeholder_target = realpath($shadow_path);
+$placeholder_normalized = $placeholder_target === false ? '' : str_replace('\\', '/', $placeholder_target);
+if ($placeholder_target === false || !preg_match('#/nc-webdav-source/connection-'.(int)$source['connection_id'].'/root-'.(int)$source['root_fileid'].'/#', $placeholder_normalized)) bratonien_tools_webdav_derivative_abort(500, 'WebDAV-Placeholder-Ziel ist ungueltig.');
+
+$shadow_dir = dirname($shadow_path);
+if (!is_dir($shadow_dir) || !is_writable($shadow_dir)) bratonien_tools_webdav_derivative_abort(500, 'WebDAV-Shadow-Verzeichnis ist fuer PHP nicht beschreibbar.');
+$upload_dir = rtrim((string)($GLOBALS['conf']['upload_dir'] ?? './upload'), '/');
+$work_rel_dir = $upload_dir.'/bratonien-webdav-materialize';
+$work_root = PHPWG_ROOT_PATH.$work_rel_dir;
+if (!is_dir($work_root) && !@mkdir($work_root, 0755, true)) bratonien_tools_webdav_derivative_abort(500, 'WebDAV-Materialisierungsbereich konnte nicht angelegt werden.');
+if (!is_writable($work_root)) bratonien_tools_webdav_derivative_abort(500, 'WebDAV-Materialisierungsbereich ist fuer PHP nicht beschreibbar.');
+
+$lock_path = $work_root.'/image-'.$image_id.'.lock';
+bratonien_tools_webdav_derivative_debug($request_id, 'waiting_lock', array('lock'=>$lock_path, 'is_link'=>is_link($shadow_path), 'realpath'=>realpath($shadow_path) ?: 'FALSE'));
+$lock = @fopen($lock_path, 'c');
+if (!$lock || !flock($lock, LOCK_EX))
+{
+  if ($lock) fclose($lock);
+  bratonien_tools_webdav_derivative_abort(503, 'WebDAV-Materialisierungslock konnte nicht gesetzt werden.');
+}
+bratonien_tools_webdav_derivative_debug($request_id, 'lock_acquired', array('is_link'=>is_link($shadow_path), 'realpath'=>realpath($shadow_path) ?: 'FALSE'));
+
+clearstatcache(true, $target_path);
+if (is_file($target_path) && is_readable($target_path))
+{
+  bratonien_tools_webdav_derivative_debug($request_id, 'target_created_while_waiting', array('target'=>$target_path));
+  @flock($lock, LOCK_UN); @fclose($lock);
+  if ($redirect_after !== null) { header('Location: '.$redirect_after, true, 302); exit; }
+  bratonien_tools_webdav_derivative_serve($target_path);
+}
+
+$token = getmypid().'-'.bin2hex(random_bytes(6));
+$download_path = $work_root.'/source-'.$image_id.'-'.$token.'.tmp';
+$staging_path = $shadow_path.'.bratonien-'.$token.'.tmp';
+$placeholder_backup = $shadow_path.'.bratonien-placeholder';
+$swapped = false;
+$cleaned = false;
+
+$cleanup = function() use (&$cleaned, &$swapped, $shadow_path, $staging_path, $placeholder_backup, $download_path, $lock, $request_id)
+{
+  if ($cleaned) return;
+  $cleaned = true;
+  if ($swapped)
+  {
+    if (is_file($shadow_path) && !is_link($shadow_path)) @unlink($shadow_path);
+    if (is_link($placeholder_backup)) @rename($placeholder_backup, $shadow_path);
+    $swapped = false;
+  }
+  if (is_file($staging_path) || is_link($staging_path)) @unlink($staging_path);
+  if (is_file($download_path)) @unlink($download_path);
+  bratonien_tools_webdav_derivative_debug($request_id, 'restored', array('is_link'=>is_link($shadow_path), 'realpath'=>realpath($shadow_path) ?: 'FALSE'));
+  @flock($lock, LOCK_UN);
+  @fclose($lock);
+};
+register_shutdown_function($cleanup);
+
+try
+{
+  if (is_link($placeholder_backup)) bratonien_tools_webdav_derivative_abort(503, 'WebDAV-Placeholder-Backup existiert bereits; vorheriger Materialisierungslauf ist nicht sauber abgeschlossen.');
+  $detail = '';
+  $download_start = microtime(true);
+  if (!bratonien_tools_webdav_derivative_download($source, $download_path, $detail)) bratonien_tools_webdav_derivative_abort(502, $detail);
+  bratonien_tools_webdav_derivative_debug($request_id, 'download_done', array('ms'=>round((microtime(true)-$download_start)*1000, 1), 'bytes'=>@filesize($download_path) ?: 0));
+
+  if (!@copy($download_path, $staging_path)) bratonien_tools_webdav_derivative_abort(500, 'Original konnte nicht in den WebDAV-Shadow-Baum kopiert werden.');
+  @chmod($staging_path, 0644);
+  if (@getimagesize($staging_path) === false) bratonien_tools_webdav_derivative_abort(500, 'Materialisierte Shadow-Quelle ist kein gueltiges Bild.');
+
+  bratonien_tools_webdav_derivative_debug($request_id, 'swap_begin', array('placeholder'=>$placeholder_target));
+  if (!@rename($shadow_path, $placeholder_backup)) bratonien_tools_webdav_derivative_abort(500, 'WebDAV-Placeholder konnte nicht temporaer gesichert werden.');
+  if (!@rename($staging_path, $shadow_path))
+  {
+    @rename($placeholder_backup, $shadow_path);
+    bratonien_tools_webdav_derivative_abort(500, 'Materialisiertes Original konnte nicht am Piwigo-Quellpfad aktiviert werden.');
+  }
+  $swapped = true;
+  clearstatcache(true, $shadow_path);
+  bratonien_tools_webdav_derivative_debug($request_id, 'swapped', array('is_link'=>is_link($shadow_path), 'realpath'=>realpath($shadow_path) ?: 'FALSE'));
+  if (!is_file($shadow_path) || is_link($shadow_path) || @getimagesize($shadow_path) === false) bratonien_tools_webdav_derivative_abort(500, 'Piwigo-Quellpfad enthaelt nach Materialisierung kein gueltiges Original.');
+
+  $inner_url = bratonien_tools_webdav_derivative_inner_url($target_path);
+  if ($inner_url === null) bratonien_tools_webdav_derivative_abort(500, 'Piwigo-i.php-URL konnte nicht bestimmt werden.');
+  $inner_status = 500;
+  $i_start = microtime(true);
+  bratonien_tools_webdav_derivative_debug($request_id, 'i_start', array('url'=>$inner_url));
+  $i_ok = bratonien_tools_webdav_derivative_call_i($inner_url, $inner_status, $detail);
+  bratonien_tools_webdav_derivative_debug($request_id, 'i_done', array('status'=>$inner_status, 'ok'=>$i_ok, 'ms'=>round((microtime(true)-$i_start)*1000, 1), 'detail'=>$detail));
+  if (!$i_ok) bratonien_tools_webdav_derivative_abort(502, $detail);
+
+  clearstatcache(true, $target_path);
+  $final_size = @getimagesize($target_path);
+  if (!is_file($target_path) || !is_readable($target_path) || !is_array($final_size)) bratonien_tools_webdav_derivative_abort(500, 'Piwigo hat kein gueltiges finales Derivat erzeugt.');
+
+  $cleanup();
+  bratonien_tools_webdav_derivative_debug($request_id, 'serve', array('target'=>$target_path, 'width'=>$final_size[0] ?? 0, 'height'=>$final_size[1] ?? 0));
+  if ($redirect_after !== null) { header('Location: '.$redirect_after, true, 302); exit; }
+  bratonien_tools_webdav_derivative_serve($target_path);
+}
+finally
+{
+  $cleanup();
+}
--- a/webdav-download-test.php
+++ b/webdav-download-test.php
@@ -0,0 +1,296 @@
+<?php
+define('PHPWG_ROOT_PATH', '../../');
+include_once(PHPWG_ROOT_PATH.'include/common.inc.php');
+
+function bratonien_tools_webdav_download_test_abort($status, $message)
+{
+  http_response_code((int)$status);
+  header('Content-Type: text/plain; charset=utf-8');
+  header('Cache-Control: no-store');
+  echo $message;
+  exit;
+}
+
+function bratonien_tools_webdav_download_test_decrypt_secret($blob, $hex_key)
+{
+  $hex_key = trim((string)$hex_key);
+  if (!preg_match('/^[a-f0-9]{64}$/', $hex_key)) return null;
+
+  $outer = base64_decode(trim((string)$blob), true);
+  $payload = is_string($outer) ? json_decode($outer, true) : null;
+  if (!is_array($payload) || (int)($payload['v'] ?? 0) !== 1) return null;
+
+  $iv = base64_decode((string)($payload['iv'] ?? ''), true);
+  $tag = base64_decode((string)($payload['tag'] ?? ''), true);
+  $cipher = base64_decode((string)($payload['data'] ?? ''), true);
+  if (!is_string($iv) || !is_string($tag) || !is_string($cipher)) return null;
+
+  $plain = openssl_decrypt($cipher, 'aes-256-gcm', hex2bin($hex_key), OPENSSL_RAW_DATA, $iv, $tag);
+  if ($plain === false) return null;
+
+  $decoded = json_decode((string)$plain, true);
+  return is_array($decoded) ? $decoded : null;
+}
+
+function bratonien_tools_webdav_download_test_quote_path($path)
+{
+  $parts = array_values(array_filter(explode('/', trim((string)$path, '/')), 'strlen'));
+  return implode('/', array_map('rawurlencode', $parts));
+}
+
+function bratonien_tools_webdav_download_test_source_info($image_id, array $image_row)
+{
+  $path = (string)($image_row['path'] ?? '');
+  if ($image_id < 1 || $path === '') return null;
+
+  $absolute = $path;
+  if (strpos($absolute, '/') !== 0)
+  {
+    $absolute = PHPWG_ROOT_PATH.ltrim(preg_replace('#^\\./#', '', $absolute), '/');
+  }
+
+  $resolved = realpath($absolute);
+  if ($resolved === false) return null;
+
+  $normalized = str_replace('\\', '/', $resolved);
+  if (!preg_match('#/nc-webdav-source/connection-([0-9]+)/root-([0-9]+)/(.*)$#', $normalized, $match))
+  {
+    return null;
+  }
+
+  $connection_id = (int)$match[1];
+  $root_fileid = (int)$match[2];
+  $relative_path = trim((string)$match[3], '/');
+  if ($connection_id < 1 || $root_fileid < 1 || $relative_path === '') return null;
+
+  $table = $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
+  $result = pwg_query('SELECT config_json FROM `'.$table.'` WHERE id='.$connection_id.' LIMIT 1');
+  if (!pwg_db_num_rows($result)) return null;
+
+  $row = pwg_db_fetch_assoc($result);
+  $config = json_decode((string)$row['config_json'], true);
+  if (!is_array($config) || (string)($config['source_mode'] ?? '') !== 'webdav-placeholder') return null;
+
+  $root_found = false;
+  $root_path = '';
+  foreach ((array)($config['roots'] ?? array()) as $root)
+  {
+    if ((int)($root['fileid'] ?? 0) === $root_fileid)
+    {
+      $root_found = true;
+      $root_path = trim((string)($root['webdav_path'] ?? ''), '/');
+      break;
+    }
+  }
+  if (!$root_found) return null;
+
+  $webdav_path = trim($root_path === '' ? $relative_path : $root_path.'/'.$relative_path, '/');
+  if ($webdav_path === '') return null;
+
+  $size = 0;
+  $state_dir = rtrim((string)($config['state_dir'] ?? ''), '/');
+  if ($state_dir !== '')
+  {
+    $mapping_file = $state_dir.'/webdav-map.json';
+    if (is_readable($mapping_file))
+    {
+      $mapping = json_decode((string)file_get_contents($mapping_file), true);
+      if (is_array($mapping) && isset($mapping['files']) && is_array($mapping['files']))
+      {
+        $entry = $mapping['files'][$resolved] ?? $mapping['files'][$normalized] ?? null;
+        if (is_array($entry) && (string)($entry['kind'] ?? '') === 'file')
+        {
+          $webdav_path = trim((string)($entry['webdav_path'] ?? $webdav_path), '/');
+          $size = (int)($entry['size'] ?? 0);
+        }
+      }
+    }
+  }
+
+  return array(
+    'connection_id'=>$connection_id,
+    'webdav_path'=>$webdav_path,
+    'size'=>$size,
+  );
+}
+
+function bratonien_tools_webdav_download_test_connection(array $source)
+{
+  $table = $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
+  $result = pwg_query('SELECT config_json, secret_blob FROM `'.$table.'` WHERE id='.(int)$source['connection_id'].' LIMIT 1');
+  if (!pwg_db_num_rows($result)) return null;
+
+  $row = pwg_db_fetch_assoc($result);
+  $config = json_decode((string)$row['config_json'], true);
+  if (!is_array($config)) return null;
+
+  $key_result = pwg_query("SELECT value FROM ".$GLOBALS['prefixeTable']."config WHERE param='bratonien_nc_connector_secret' LIMIT 1");
+  if (!pwg_db_num_rows($key_result)) return null;
+  $key_row = pwg_db_fetch_assoc($key_result);
+
+  $credentials = bratonien_tools_webdav_download_test_decrypt_secret((string)$row['secret_blob'], (string)$key_row['value']);
+  if (!is_array($credentials)) return null;
+
+  $base_url = rtrim((string)($config['nextcloud_url'] ?? ''), '/');
+  $user = trim((string)($credentials['nextcloud_user'] ?? ''));
+  $password = (string)($credentials['nextcloud_password'] ?? '');
+  if ($base_url === '' || $user === '' || $password === '') return null;
+
+  return array('base_url'=>$base_url, 'user'=>$user, 'password'=>$password);
+}
+
+global $user;
+if (!isset($user['status']) || !in_array($user['status'], array('admin', 'webmaster'), true))
+{
+  bratonien_tools_webdav_download_test_abort(403, 'Dieser Test-Endpunkt ist nur fuer Administratoren verfuegbar.');
+}
+
+$image_id = (int)($_GET['id'] ?? 0);
+$parallel = (int)($_GET['parallel'] ?? 1);
+if ($image_id < 1)
+{
+  bratonien_tools_webdav_download_test_abort(400, 'Bild-ID fehlt.');
+}
+if ($parallel < 1 || $parallel > 20)
+{
+  bratonien_tools_webdav_download_test_abort(400, 'parallel muss zwischen 1 und 20 liegen.');
+}
+
+$result = pwg_query('SELECT * FROM '.IMAGES_TABLE.' WHERE id='.$image_id.' LIMIT 1');
+if (!pwg_db_num_rows($result))
+{
+  bratonien_tools_webdav_download_test_abort(404, 'Bild nicht gefunden.');
+}
+$image_row = pwg_db_fetch_assoc($result);
+
+$source = bratonien_tools_webdav_download_test_source_info($image_id, $image_row);
+if (!$source)
+{
+  bratonien_tools_webdav_download_test_abort(404, 'Keine WebDAV-Quelle fuer dieses Bild gefunden.');
+}
+
+$connection = bratonien_tools_webdav_download_test_connection($source);
+if (!$connection)
+{
+  bratonien_tools_webdav_download_test_abort(500, 'WebDAV-Verbindung konnte nicht geladen werden.');
+}
+
+$upload_dir = rtrim((string)($GLOBALS['conf']['upload_dir'] ?? './upload'), '/');
+$test_rel_dir = $upload_dir.'/bratonien-webdav-download-test';
+$test_root = PHPWG_ROOT_PATH.$test_rel_dir;
+if (!is_dir($test_root) && !@mkdir($test_root, 0755, true))
+{
+  bratonien_tools_webdav_download_test_abort(500, 'Download-Testbereich konnte nicht angelegt werden: '.$test_root);
+}
+if (!is_writable($test_root))
+{
+  bratonien_tools_webdav_download_test_abort(500, 'Download-Testbereich ist fuer PHP nicht beschreibbar: '.$test_root);
+}
+
+$url = $connection['base_url'].'/remote.php/dav/files/'.rawurlencode($connection['user']).'/'.bratonien_tools_webdav_download_test_quote_path($source['webdav_path']);
+$token = getmypid().'-'.bin2hex(random_bytes(6));
+$multi = curl_multi_init();
+$items = array();
+
+for ($i = 0; $i < $parallel; $i++)
+{
+  $path = $test_root.'/download-'.$image_id.'-'.$token.'-'.$i.'.tmp';
+  $fp = @fopen($path, 'xb');
+  if (!$fp)
+  {
+    foreach ($items as $item)
+    {
+      @fclose($item['fp']);
+      @unlink($item['path']);
+      curl_multi_remove_handle($multi, $item['ch']);
+      curl_close($item['ch']);
+    }
+    curl_multi_close($multi);
+    bratonien_tools_webdav_download_test_abort(500, 'Temporaere Download-Datei konnte nicht angelegt werden.');
+  }
+
+  $ch = curl_init($url);
+  curl_setopt_array($ch, array(
+    CURLOPT_FOLLOWLOCATION => false,
+    CURLOPT_CONNECTTIMEOUT => 10,
+    CURLOPT_TIMEOUT => 180,
+    CURLOPT_HTTPAUTH => CURLAUTH_BASIC,
+    CURLOPT_USERPWD => $connection['user'].':'.$connection['password'],
+    CURLOPT_RETURNTRANSFER => false,
+    CURLOPT_FAILONERROR => false,
+    CURLOPT_FILE => $fp,
+    CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Download-Stress-Test',
+  ));
+  curl_multi_add_handle($multi, $ch);
+  $items[] = array('ch'=>$ch, 'fp'=>$fp, 'path'=>$path);
+}
+
+$started_at = microtime(true);
+do
+{
+  $status = curl_multi_exec($multi, $running);
+  if ($status !== CURLM_OK) break;
+  if ($running > 0)
+  {
+    $selected = curl_multi_select($multi, 1.0);
+    if ($selected === -1) usleep(10000);
+  }
+}
+while ($running > 0);
+$elapsed_seconds = microtime(true) - $started_at;
+
+$downloads = array();
+$total_bytes = 0;
+$successful = 0;
+$failed = 0;
+
+foreach ($items as $index => $item)
+{
+  @fflush($item['fp']);
+  @fclose($item['fp']);
+
+  $http = (int)curl_getinfo($item['ch'], CURLINFO_HTTP_CODE);
+  $time_ms = round((float)curl_getinfo($item['ch'], CURLINFO_TOTAL_TIME) * 1000, 2);
+  $errno = curl_errno($item['ch']);
+  $error = curl_error($item['ch']);
+  $bytes = is_file($item['path']) ? (int)filesize($item['path']) : 0;
+  $ok = ($errno === 0 && $http >= 200 && $http < 300 && $bytes > 0);
+
+  if ($ok) $successful++; else $failed++;
+  $total_bytes += $bytes;
+
+  $downloads[] = array(
+    'index'=>$index + 1,
+    'ok'=>$ok,
+    'http'=>$http,
+    'bytes'=>$bytes,
+    'elapsed_ms'=>$time_ms,
+    'mbps'=>$time_ms > 0 ? round(($bytes * 8) / ($time_ms / 1000) / 1000000, 2) : 0,
+    'curl_errno'=>$errno,
+    'curl_error'=>$error,
+  );
+
+  @unlink($item['path']);
+  curl_multi_remove_handle($multi, $item['ch']);
+  curl_close($item['ch']);
+}
+curl_multi_close($multi);
+
+$elapsed_ms = round($elapsed_seconds * 1000, 2);
+$aggregate_mbps = $elapsed_seconds > 0 ? round(($total_bytes * 8) / $elapsed_seconds / 1000000, 2) : 0;
+
+header('Content-Type: application/json; charset=utf-8');
+header('Cache-Control: no-store');
+echo json_encode(array(
+  'image_id'=>$image_id,
+  'parallel'=>$parallel,
+  'same_source_repeated'=>true,
+  'expected_source_bytes'=>(int)$source['size'],
+  'successful'=>$successful,
+  'failed'=>$failed,
+  'total_bytes'=>$total_bytes,
+  'peak_temp_disk_bytes'=>$total_bytes,
+  'elapsed_ms'=>$elapsed_ms,
+  'aggregate_mbps'=>$aggregate_mbps,
+  'downloads'=>$downloads,
+), JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
--- a/webdav-image.php
+++ b/webdav-image.php
@@ -8,6 +8,7 @@ if (!defined('BRATONIEN_TOOLS_PATH'))
  define('BRATONIEN_TOOLS_PATH', PHPWG_ROOT_PATH.'plugins/'.BRATONIEN_TOOLS_ID.'/');
 }
 require_once(BRATONIEN_TOOLS_PATH.'include/webdav_image_runtime.inc.php');
+require_once(BRATONIEN_TOOLS_PATH.'include/webdav_materialize_runtime.inc.php');

 function bratonien_tools_webdav_image_abort($status, $message)
 {
@@ -48,7 +49,7 @@ $permission_condition = get_sql_condition_FandF(array('forbidden_categories'=>'c
 $access_result = pwg_query('SELECT 1 FROM '.IMAGE_CATEGORY_TABLE.' WHERE image_id='.$image_id.' AND '.$permission_condition.' LIMIT 1');
 if (!pwg_db_num_rows($access_result)) bratonien_tools_webdav_image_abort(403, 'Kein Zugriff auf dieses Bild.');

-$source = bratonien_tools_webdav_image_source_info($image_id);
+$source = bratonien_tools_webdav_materialize_source_info($image_id);
 if (!$source) bratonien_tools_webdav_image_abort(404, 'Keine WebDAV-Quelle für dieses Bild gefunden.');

 if (!empty($_GET['preview']))
@@ -120,7 +121,7 @@ $options = array(
  CURLOPT_USERPWD => $user.':'.$password,
  CURLOPT_RETURNTRANSFER => false,
  CURLOPT_FAILONERROR => false,
-  CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Image/0.9.6.1',
+  CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Image/0.9.6.8.6',
  CURLOPT_HEADERFUNCTION => function($ch, $line)
  {
    $length = strlen($line);
Author	SHA1	Message	Date
Terranom674	f958eca176	Bump version to 0.9.6.8.15	2026-08-20 16:54:35 +02:00
Terranom674	93af719143	Flatten empty WebDAV root into gallery root	2026-08-20 16:54:06 +02:00
Terranom674	11183f2a41	Bump version to 0.9.6.8.14	2026-08-20 16:41:27 +02:00
Terranom674	26bb454ba4	Preserve empty WebDAV root path in sync	2026-08-20 16:41:10 +02:00
Terranom674	a195421fed	Allow empty WebDAV root path in reconcile	2026-08-20 16:40:47 +02:00
Terranom674	ec55220124	Bump plugin version to 0.9.6.8.13	2026-08-20 16:15:08 +02:00
Terranom674	f5d3b97339	Use absolute runtime path for manual WebDAV sync	2026-08-20 16:14:41 +02:00
Terranom674	a5b4a2329e	Bump version to 0.9.6.8.12	2026-08-20 16:13:13 +02:00
Terranom674	97340a517b	Run manual WebDAV sync directly from plugin	2026-08-20 16:12:52 +02:00
Terranom674	238c06be33	Bump Bratonien Tools to 0.9.6.8.11	2026-08-20 16:09:54 +02:00
Terranom674	792e8eb7d2	Add manual WebDAV sync button to connector status	2026-08-20 16:09:15 +02:00
Terranom674	d489bd7979	Bump version to 0.9.6.8.10	2026-08-20 16:05:58 +02:00
Terranom674	e8a5f5f0f7	Add NC connector run-now button to admin status	2026-08-20 16:05:36 +02:00
Terranom674	ecc7665ed3	Register manual NC connector run	2026-08-20 16:05:04 +02:00
Terranom674	0d3764f043	Add manual NC connector run and clean status text	2026-08-20 16:04:45 +02:00
Terranom674	81b3b31689	Bump plugin version to 0.9.6.8.9	2026-08-20 15:59:14 +02:00
Terranom674	dcd1b9fb66	Make WebDAV shadow directories writable for runtime materialization	2026-08-20 15:58:57 +02:00
Terranom674	72a89a4636	Bump version to 0.9.6.8.8	2026-08-20 15:48:58 +02:00
Terranom674	2e03cc50d8	Add WebDAV derivative gate diagnostics	2026-08-20 15:48:29 +02:00
Terranom674	d2f171718e	Bump version to 0.9.6.8.7	2026-08-20 15:34:33 +02:00
Terranom674	403b1df43f	Simplify WebDAV gate to materialize real Piwigo source	2026-08-20 15:34:11 +02:00
Terranom674	38e6ebdb19	Switch WebDAV images to on-demand Piwigo materialization	2026-08-20 15:17:05 +02:00
Terranom674	474acf1de3	Use materialization resolver for WebDAV originals	2026-08-20 15:16:51 +02:00
Terranom674	fe3c7fede2	Add production WebDAV derivative materialization gate	2026-08-20 15:16:30 +02:00
Terranom674	ec801b88d2	Add production WebDAV materialization runtime	2026-08-20 15:15:40 +02:00
Terranom674	9eb38d7dcf	Bump version to 0.9.6.8.5	2026-08-20 14:48:15 +02:00
Terranom674	1a7e9a13ee	Add parallel WebDAV download stress test	2026-08-20 14:47:51 +02:00
Terranom674	e1d2598e22	Bump version to 0.9.6.8.4	2026-08-20 14:40:46 +02:00
Terranom674	29063b296a	Add resource metrics to WebDAV derivative test	2026-08-20 14:40:13 +02:00
Terranom674	210c180e49	Bump test version to 0.9.6.8.3	2026-08-20 14:31:54 +02:00
Terranom674	7ef6c24db4	Move WebDAV derivative test source to Piwigo upload area	2026-08-20 14:31:28 +02:00
Terranom674	1e57e6d300	Bump test patch version to 0.9.6.8.2	2026-08-20 14:25:29 +02:00
Terranom674	57eec81801	Use Piwigo derivative dir for parallel test workspace	2026-08-20 14:24:53 +02:00
Terranom674	0ea01d9a26	Bump plugin version to 0.9.6.8.1	2026-08-20 14:22:36 +02:00
Terranom674	b901b4e887	Bump plugin version for parallel derivative test	2026-08-20 14:20:17 +02:00
Terranom674	bc5a94dc10	Make WebDAV derivative test fully parallel	2026-08-20 14:19:43 +02:00
Terranom674	34a473fa07	Bump plugin version for WebDAV derivative root test	2026-08-20 14:08:13 +02:00
Terranom674	7fc038e107	Fix WebDAV root matching in derivative test path	2026-08-20 14:07:41 +02:00
Terranom674	3b2a8306ad	Bump version for WebDAV diagnostic endpoint	2026-08-20 14:03:38 +02:00
Terranom674	dae5f9a610	Add isolated WebDAV derivative path diagnostics	2026-08-20 14:03:04 +02:00
Terranom674	929f18a5f5	Fix duplicate private album access function and bump version	2026-08-20 13:49:33 +02:00
Terranom674	0c45576e2f	Bump plugin version for WebDAV derivative test	2026-08-20 13:46:25 +02:00
Terranom674	ee01842cb4	Add parallel WebDAV derivative materialization test endpoint	2026-08-20 13:41:17 +02:00
Terranom674	a872f9238c	Merge pull request #52 from Terranom674/fix/0963-clean-webdav-orphans 0.9.6.3: verwaiste WebDAV-Bilder einmalig bereinigen	2026-08-20 11:25:39 +02:00
Terranom674	fdcf045f39	0.9.6.3: WebDAV-Pfadfilter exakt begrenzen	2026-08-20 11:24:56 +02:00
Terranom674	7831a9513f	Version 0.9.6.3	2026-08-20 11:24:19 +02:00
Terranom674	fed089db4c	0.9.6.3: Altlasten-Reparatur einmalig vor WebDAV-Sync ausführen	2026-08-20 11:23:54 +02:00
Terranom674	77a295d74f	0.9.6.3: einmalige Reparatur verwaister WebDAV-Bilder	2026-08-20 11:23:33 +02:00
Terranom674	ecabf2da2f	Merge PR #51 : WebDAV-only connector cleanup Remove obsolete legacy/local connector paths while preserving the WebDAV connector, shadow tree, placeholder mapping and Piwigo sync bridge.	2026-08-20 11:08:55 +02:00