Fix SFTP root navigation on Windows

Use portable POSIX parent paths instead of platform-dependent dirname() for remote navigation, previews, uploads, file operations and shared URLs.

Normalize browser paths, avoid doubled root separators and preserve top-level directory names in ZIP downloads.

Add regression coverage for root navigation, generated links, relative paths and ZIP members, and document the new test command. Verified with PHP syntax checks and all three regression suites.

README.md

@@ -105,7 +105,8 @@ USB-RAID-Array/
 │   └── ...                  # původní technická dokumentace a podklady
 ├── tests/
 │   ├── workspace_test.php
-│   └── serverstats_test.php
+│   ├── serverstats_test.php
+│   └── remotepaths_test.php
 └── Web/
     ├── index.php            # přihlášení
     ├── config/config.php    # databáze, SFTP a SSH
@@ -127,6 +128,7 @@ Z kořene repozitáře:
 ```sh
 php tests/workspace_test.php
 php tests/serverstats_test.php
+php tests/remotepaths_test.php
 node --check Web/js/theme.js
 node --check Web/js/ui.js
 node --check Web/content/ftp/js/index.js

Web/config/config.php

@@ -3,6 +3,7 @@
 
 // Autoload dependencies (phpseclib)
 require_once __DIR__ . '/../vendor/autoload.php';
+require_once __DIR__ . '/../includes/remotepaths.php';
 
 use phpseclib3\Net\SFTP;
 use phpseclib3\Net\SSH2;
@@ -56,17 +57,4 @@ function getSSHConnection(): SSH2 {
     return $ssh;
 }
 
-/** Utility: Normalise a path */
-function normalizePath(string $path): string {
-    $parts = array_filter(explode('/', $path), fn($part) => $part !== '' && $part !== '.');
-    $stack = [];
-    foreach ($parts as $part) {
-        if ($part === '..') {
-            array_pop($stack);
-        } else {
-            $stack[] = $part;
-        }
-    }
-    return '/' . implode('/', $stack);
-}
 ?>

Web/content/ftp/delete.php

@@ -5,7 +5,7 @@ $sftp = initializeSFTP();
 
 if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['delete'])) {
     $itemToDelete = $_POST['delete'];
-    $parentDir = dirname($itemToDelete);
+    $parentDir = remoteDirname($itemToDelete);
 
     if ($parentDir === '/' || $parentDir === '.') {
         $parentDir = $defaultPath;

Web/content/ftp/download.php

@@ -41,7 +41,7 @@ try {
             $fullRemotePath = rtrim($currentPath, '/') . '/' . $file;
             
             $baseDirName = basename($remoteBasePath);
-            $relPathFromBase = substr($fullRemotePath, strlen(dirname($remoteBasePath)) + 1);
+            $relPathFromBase = substr($fullRemotePath, strlen(rtrim(remoteDirname($remoteBasePath), '/')) + 1);
             file_put_contents($logFile, "Processing: $fullRemotePath (relative: $relPathFromBase)\n", FILE_APPEND);
             
             $isDir = $sftp->is_dir($fullRemotePath);

Web/content/ftp/extract.php

@@ -24,7 +24,7 @@ $sftp = initializeSFTP();
 // Process extraction request
 if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['archive'])) {
     $archivePath = $_POST['archive'];
-    $dirPath = dirname($archivePath);
+    $dirPath = remoteDirname($archivePath);
     $archiveName = basename($archivePath);
     $extension = pathinfo($archiveName, PATHINFO_EXTENSION);
     

Web/content/ftp/index.php

@@ -13,11 +13,12 @@
     error_reporting(E_ALL);
 
     require_once __DIR__ . '/../../config/config.php';
-require_once __DIR__ . '/../../includes/workspace.php';
+    require_once __DIR__ . '/../../includes/workspace.php';
     $sftp = initializeSFTP();
 
+    $defaultPath = normalizePath($defaultPath);
     $currentPath = isset($_GET['path']) ? normalizePath($_GET['path']) : $defaultPath;
-    if (strpos($currentPath, $defaultPath) !== 0) {
+    if ($currentPath !== $defaultPath && strpos($currentPath, rtrim($defaultPath, '/') . '/') !== 0) {
         $currentPath = $defaultPath;
     }
 
@@ -188,30 +189,30 @@ require_once __DIR__ . '/../../includes/workspace.php';
 
                     if ($currentPath !== $defaultPath) : ?>
                         <tr>
-                            <td colspan="3"><a class="text-danger" href="?path=<?= urlencode(dirname($currentPath)) ?>"><b>↑ Parent folder</b></a></td>
+                            <td colspan="3"><a class="text-danger" href="?path=<?= urlencode(remoteDirname($currentPath)) ?>"><b>↑ Parent folder</b></a></td>
                         </tr>
                     <?php endif;
 
                     foreach ($directories as $directory) : ?>
                         <tr data-file-name="<?= htmlspecialchars($directory) ?>" data-kind="folder">
                             <td><span class="file-icon folder-icon" aria-hidden="true">▰</span>
-                                <a href="?path=<?= urlencode($currentPath . '/' . $directory) ?>"><?= htmlspecialchars($directory) ?></a></td><td class="size-cell">—</td>
+                                <a href="?path=<?= urlencode(rtrim($currentPath, '/') . '/' . $directory) ?>"><?= htmlspecialchars($directory) ?></a></td><td class="size-cell">—</td>
                             <td>
                                 <?php if (isset($_SESSION["delPer"]) && $_SESSION["delPer"] == true) : ?>
                                     <form method="POST" action="delete.php" style="display:inline;">
-                                        <input type="hidden" name="delete" value="<?= htmlspecialchars($currentPath . '/' . $directory) ?>">
+                                        <input type="hidden" name="delete" value="<?= htmlspecialchars(rtrim($currentPath, '/') . '/' . $directory) ?>">
                                         <button type="submit" class="btn btn-danger mt-1 mb-1" onclick="confirmDelete(event)">Delete</button>
                                     </form>
                                 <?php endif; ?>
 
                                 <?php if (isset($_SESSION["downPer"]) && $_SESSION["downPer"] == true) : ?>
                                     <form method="POST" action="download.php" style="display:inline;">
-                                        <input type="hidden" name="file" value="<?= htmlspecialchars($currentPath . '/' . $directory) ?>">
+                                        <input type="hidden" name="file" value="<?= htmlspecialchars(rtrim($currentPath, '/') . '/' . $directory) ?>">
                                         <button type="submit" class="btn btn-success mt-1 mb-1">Download</button>
                                     </form>
                                 <?php endif; ?>
                                 <?php if (isset($_SESSION["upPer"]) && $_SESSION["upPer"] == true) : ?>
-                                    <button type="button" class="btn btn-warning mt-1 mb-1" onclick="openRenameModal('<?= htmlspecialchars(addslashes($directory)) ?>', '<?= htmlspecialchars(addslashes($currentPath . '/' . $directory)) ?>', true)">Rename</button>
+                                    <button type="button" class="btn btn-warning mt-1 mb-1" onclick="openRenameModal('<?= htmlspecialchars(addslashes($directory)) ?>', '<?= htmlspecialchars(addslashes(rtrim($currentPath, '/') . '/' . $directory)) ?>', true)">Rename</button>
                                 <?php endif; ?>
                             </td>
                         </tr>
@@ -235,7 +236,7 @@ require_once __DIR__ . '/../../includes/workspace.php';
                         <tr data-file-name="<?= htmlspecialchars($file) ?>" data-kind="file">
                             <td><span class="file-icon" aria-hidden="true">▤</span>
                                 <?php if ($isMedia): ?>
-                                <a class="text-info-emphasis" href="view.php?file=<?= urlencode($currentPath . '/' . $file) ?>">
+                                <a class="text-info-emphasis" href="view.php?file=<?= urlencode(rtrim($currentPath, '/') . '/' . $file) ?>">
                                     <?= htmlspecialchars($file) ?>
                                 </a>
                                 <?php if ($isImage): ?>
@@ -246,12 +247,12 @@ require_once __DIR__ . '/../../includes/workspace.php';
                                     <span class="badge bg-info rounded-pill">Audio</span>
                                 <?php endif; ?>
                                 <?php elseif ($isEditable): ?>
-                                    <a class="text-warning-emphasis" href="open.php?file=<?= urlencode($currentPath . '/' . $file) ?>">
+                                    <a class="text-warning-emphasis" href="open.php?file=<?= urlencode(rtrim($currentPath, '/') . '/' . $file) ?>">
                                         <?= htmlspecialchars($file) ?>
                                     </a>
                                     <span class="badge bg-secondary rounded-pill"><?= htmlspecialchars($fileExtension) ?></span>
                                     <?php elseif ($isPDF): ?>
-                                        <a class="text-info-emphasis" href="pdf.php?file=<?= urlencode($currentPath . '/' . $file) ?>&type=pdf">
+                                        <a class="text-info-emphasis" href="pdf.php?file=<?= urlencode(rtrim($currentPath, '/') . '/' . $file) ?>&type=pdf">
                                             <?= htmlspecialchars($file) ?>
                                         </a>
                                         <span class="badge bg-danger rounded-pill">PDF</span>
@@ -261,28 +262,28 @@ require_once __DIR__ . '/../../includes/workspace.php';
                                 <?php endif; ?>
                             </td>
                             <td>
-                                <span class="text"><?= formatBytes($sftp->stat($currentPath . '/' . $file)['size']) ?></span>
+                                <span class="text"><?= formatBytes($sftp->stat(rtrim($currentPath, '/') . '/' . $file)['size']) ?></span>
                             </td>
                             <td>
                                 <?php if (isset($_SESSION["delPer"]) && $_SESSION["delPer"] == true) : ?>
                                     <form method="POST" action="delete.php" style="display:inline;">
-                                        <input type="hidden" name="delete" value="<?= htmlspecialchars($currentPath . '/' . $file) ?>">
+                                        <input type="hidden" name="delete" value="<?= htmlspecialchars(rtrim($currentPath, '/') . '/' . $file) ?>">
                                         <button type="submit" class="btn btn-danger mt-1 mb-1" onclick="confirmDelete(event)">Delete</button>
                                     </form>
                                 <?php endif; ?>
 
                                 <?php if (isset($_SESSION["downPer"]) && $_SESSION["downPer"] == true) : ?>
                                     <form method="POST" action="download.php" style="display:inline;">
-                                        <input type="hidden" name="file" value="<?= htmlspecialchars($currentPath . '/' . $file) ?>">
+                                        <input type="hidden" name="file" value="<?= htmlspecialchars(rtrim($currentPath, '/') . '/' . $file) ?>">
                                         <button type="submit" class="btn btn-success mt-1 mb-1">Download</button>
                                     </form>
                                 <?php endif; ?>
                                 <?php if (isset($_SESSION["upPer"]) && $_SESSION["upPer"] == true) : ?>
-                                    <button type="button" class="btn btn-warning mt-1 mb-1" onclick="openRenameModal('<?= htmlspecialchars(addslashes($file)) ?>', '<?= htmlspecialchars(addslashes($currentPath . '/' . $file)) ?>')">Rename</button>
+                                    <button type="button" class="btn btn-warning mt-1 mb-1" onclick="openRenameModal('<?= htmlspecialchars(addslashes($file)) ?>', '<?= htmlspecialchars(addslashes(rtrim($currentPath, '/') . '/' . $file)) ?>')">Rename</button>
                                 <?php endif; ?>
                                 <?php if ($isArchive && isset($_SESSION["upPer"]) && $_SESSION["upPer"] == true) : ?>
                                     <form method="POST" action="extract.php" style="display:inline;">
-                                        <input type="hidden" name="archive" value="<?= htmlspecialchars($currentPath . '/' . $file) ?>">
+                                        <input type="hidden" name="archive" value="<?= htmlspecialchars(rtrim($currentPath, '/') . '/' . $file) ?>">
                                         <button type="submit" class="btn btn-info mt-1 mb-1">Extract</button>
                                     </form>
                                 <?php endif; ?>

Web/content/ftp/open.php

@@ -52,7 +52,7 @@ if (!empty($filePath) && $sftp->file_exists($filePath) && !$sftp->is_dir($filePa
 
 $showLineNumbers = in_array(strtolower($extension), ['php', 'js', 'html', 'css', 'py', 'java', 'c', 'cpp', 'h', 'hpp', 'rb', 'sh', 'xml', 'json']);
 
-$parentDir = dirname($filePath);
+$parentDir = remoteDirname($filePath);
 ?>
 <!DOCTYPE html>
 <html lang="en">

Web/content/ftp/pdf.php

@@ -134,7 +134,7 @@ if (isset($_GET['stream'])) {
     'title' => $fileName,
     'description' => 'Browse your document without leaving the workspace.',
     'connected' => true,
-    'back' => 'index.php?path=' . urlencode(dirname($filePath)),
+    'back' => 'index.php?path=' . urlencode(remoteDirname($filePath)),
     'class' => 'pdf-page',
 ]); ?>
 

Web/content/ftp/rename.php

@@ -26,7 +26,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         die("Missing required information for renaming.");
     }
 
-    $dirPath = dirname($oldPath);
+    $dirPath = remoteDirname($oldPath);
     $oldName = basename($oldPath);
 
     $newPath = $dirPath . '/' . $newName;

Web/content/ftp/upload.php

@@ -20,7 +20,7 @@ function createDirectoryRecursive($sftp, $path) {
         return true;
     }
     
-    $parent = dirname($path);
+    $parent = remoteDirname($path);
     if ($parent != '/' && !$sftp->is_dir($parent)) {
         createDirectoryRecursive($sftp, $parent);
     }
@@ -91,7 +91,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         if (!empty($relativePath)) {
             $fileName = basename($relativePath);
 
-            $dirPart = dirname($relativePath);
+            $dirPart = remoteDirname($relativePath);
             if ($dirPart !== '.' && $dirPart !== '') {
                 $remoteDirPath = $currentPath . '/' . $dirPart;
 

Web/content/ftp/view.php

@@ -38,7 +38,7 @@ if (isset($_POST['createShare'])) {
 
     if ($stmt->execute()) {
         $shareUrl = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http") . "://$_SERVER[HTTP_HOST]" .
-                    dirname($_SERVER['PHP_SELF']) . "/shared.php?token=$token";
+                    remoteDirname($_SERVER['PHP_SELF']) . "/shared.php?token=$token";
 
         $_SESSION['shareCreated'] = true;
         $_SESSION['shareUrl'] = $shareUrl;
@@ -274,7 +274,7 @@ if (isset($_GET['stream'])) {
     'title' => $fileName,
     'description' => 'Preview your media, download a copy or create a shared link.',
     'connected' => true,
-    'back' => 'index.php?path=' . urlencode(dirname($filePath)),
+    'back' => 'index.php?path=' . urlencode(remoteDirname($filePath)),
     'class' => 'media-page',
 ]); ?>
 

Web/includes/remotepaths.php

@@ -0,0 +1,24 @@
+<?php
+/** SFTP paths use POSIX separators, regardless of the OS running PHP. */
+function normalizePath(string $path): string {
+    $parts = array_filter(explode('/', $path), fn($part) => $part !== '' && $part !== '.');
+    $stack = [];
+    foreach ($parts as $part) {
+        if ($part === '..') {
+            array_pop($stack);
+        } else {
+            $stack[] = $part;
+        }
+    }
+    return '/' . implode('/', $stack);
+}
+
+/** Like dirname(), but only '/' is a separator and the root stays '/'. */
+function remoteDirname(string $path): string {
+    $path = rtrim($path, '/');
+    if ($path === '') return '/';
+    $separator = strrpos($path, '/');
+    if ($separator === false) return '.';
+    $parent = rtrim(substr($path, 0, $separator), '/');
+    return $parent === '' ? '/' : $parent;
+}

tests/remotepaths_test.php

@@ -0,0 +1,31 @@
+<?php
+require_once __DIR__ . '/../Web/includes/remotepaths.php';
+
+$parents = [
+    '/' => '/',
+    '/etc' => '/',
+    '/etc/' => '/',
+    '/etc/file.txt' => '/etc',
+    '//etc//file.txt' => '//etc',
+    '/folder with spaces/item.txt' => '/folder with spaces',
+    'folder/file.txt' => 'folder',
+    'file.txt' => '.',
+    '/a\\b/file.txt' => '/a\\b', // Backslash is a valid POSIX filename character.
+];
+foreach ($parents as $path => $expected) {
+    if (remoteDirname($path) !== $expected) throw new RuntimeException('Incorrect parent for ' . $path);
+}
+foreach (['/' => '/', '//etc/../' => '/', '/etc/../../' => '/', '/etc/./ssh/' => '/etc/ssh'] as $path => $expected) {
+    if (normalizePath($path) !== $expected) throw new RuntimeException('Incorrect normalized path for ' . $path);
+}
+// Round trips must remain correct on both Windows/XAMPP and Linux.
+foreach (['/etc', '/mnt/raid', '/folder with spaces'] as $directory) {
+    $parent = normalizePath(remoteDirname($directory));
+    if ($parent !== ($directory === '/mnt/raid' ? '/mnt' : '/')) throw new RuntimeException('Invalid navigation round trip');
+}
+// ZIP paths keep the top-level directory name when it is directly under root.
+foreach (['/etc' => '/etc/config.txt', '/mnt/raid' => '/mnt/raid/config.txt'] as $base => $file) {
+    $relative = substr($file, strlen(rtrim(remoteDirname($base), '/')) + 1);
+    if ($relative !== ($base === '/etc' ? 'etc/config.txt' : 'raid/config.txt')) throw new RuntimeException('Incorrect ZIP member path');
+}
+echo "Remote paths: POSIX parents, normalization, root navigation and ZIP paths passed.\n";

tests/workspace_test.php

@@ -1,5 +1,6 @@
 <?php
 require_once __DIR__ . '/../Web/includes/workspace.php';
+require_once __DIR__ . '/../Web/includes/remotepaths.php';
 require_once __DIR__ . '/../Web/content/ftp/lib/serverstats.php';
 set_error_handler(function ($severity, $message, $file, $line) {
     if (error_reporting() & $severity) throw new ErrorException($message, 0, $severity, $file, $line);
@@ -8,9 +9,8 @@ function expectWorkspace($condition, $message) {
     if (!$condition) throw new RuntimeException($message);
 }
 
-function renderWorkspaceFixture($name, $admin = true) {
+function renderWorkspaceFixture($name, $admin = true, $defaultPath = '/mnt/raid', $currentPath = '/mnt/raid/Workspace') {
     $_SESSION = ['uname' => 'michal', 'admin' => $admin, 'upPer' => true, 'downPer' => true, 'delPer' => true];
-    $defaultPath = '/mnt/raid'; $currentPath = '/mnt/raid/Workspace';
     $filePath = $currentPath . '/Example.pdf'; $fileName = basename($filePath); $parentDir = $currentPath;
     $fileExtension = 'png'; $fileSize = 245760; $mimeType = 'image/png';
     $isImage = true; $isVideo = false; $isAudio = false;
@@ -75,6 +75,12 @@ foreach ($pages as $name) {
 $member = renderWorkspaceFixture('index', false);
 expectWorkspace(strpos($member, 'User management') === false && strpos($member, '> Server status</a>') === false, 'Member navigation omits admin pages');
 expectWorkspace(strpos($member, 'Account settings') !== false, 'Members can access account settings');
+$rootChild = renderWorkspaceFixture('index', true, '/', '/etc');
+expectWorkspace(strpos($rootChild, 'href="?path=%2F"') !== false, 'Parent link from a root child uses a POSIX slash');
+expectWorkspace(strpos($rootChild, '%5C') === false, 'No Windows separator in remote links');
+$root = renderWorkspaceFixture('index', true, '/', '/');
+expectWorkspace(strpos($root, 'Parent folder') === false, 'Root has no parent-folder link');
+expectWorkspace(strpos($root, 'href="?path=%2FDocuments"') !== false, 'Root children use a single leading slash');
 if ($preview) {
     // One-page PDF fixture for viewer navigation and fullscreen checks.
     $stream = "BT /F1 24 Tf 60 700 Td (USB RAID workspace preview) Tj ET";