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<?php |
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|
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namespace FluentBoards\App\Services\Libs; |
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|
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use FluentBoards\Framework\Support\Arr; |
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use FluentBoards\App\Services\Constant; |
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use Exception; |
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|
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class FileSystem |
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{ |
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protected $subDir = ''; |
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|
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public function _setSubDir($subDir) |
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{ |
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$this->subDir = $subDir; |
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return $this; |
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} |
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/** |
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* Read file content from custom upload dir of this application |
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* @return string [path] |
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*/ |
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public function _get($file) |
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{ |
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$arr = explode('/', $file); |
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$fileName = end($arr); |
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if ($this->subDir) { |
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$fileName = $this->subDir . DIRECTORY_SEPARATOR . $fileName; |
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} |
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|
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$filePath = $this->getDir() . DIRECTORY_SEPARATOR . $fileName; |
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|
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// Use WordPress Filesystem API |
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global $wp_filesystem; |
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if (!function_exists('WP_Filesystem')) { |
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require_once(ABSPATH . 'wp-admin/includes/file.php'); |
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} |
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WP_Filesystem(); |
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|
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return $wp_filesystem->get_contents($filePath); |
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} |
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|
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/** |
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* Get custom upload dir name of this application |
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* @return string [directory path] |
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*/ |
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public function _getDir() |
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{ |
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$uploadDir = wp_upload_dir(); |
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|
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$fbsUploadDir = apply_filters('fluent_boards/upload_folder_name', FLUENT_BOARDS_UPLOAD_DIR); |
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|
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if ($this->subDir) { |
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return $uploadDir['basedir'] . DIRECTORY_SEPARATOR . $fbsUploadDir. DIRECTORY_SEPARATOR. $this->subDir; |
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} |
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|
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return $uploadDir['basedir'] . DIRECTORY_SEPARATOR . $fbsUploadDir; |
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} |
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|
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/** |
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* Prepare local storage with Apache rules or verified host-managed protection. |
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* Installing rules alone does not prove the HTTP server enforces them. |
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* Pass false to defer any required HTTP verification to cron. |
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*/ |
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public function _installUploadProtectionRules($allowProbe = true) |
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{ |
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// Protect the root even when called on a board-specific filesystem instance. |
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$directory = (new static())->_getDir(); |
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if (!wp_mkdir_p($directory)) { |
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return false; |
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} |
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|
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$path = $directory . '/.htaccess'; |
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$rules = [ |
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'<IfModule mod_authz_core.c>', |
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'Require all denied', |
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'</IfModule>', |
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'<IfModule !mod_authz_core.c>', |
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'Order deny,allow', |
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'Deny from all', |
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'</IfModule>', |
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]; |
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|
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// Hosts may lock security configuration while leaving upload storage writable. |
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if (is_file($path) && is_readable($path)) { |
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$contents = str_replace("\r\n", "\n", file_get_contents($path)); |
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if (preg_match_all('/^# BEGIN Fluent Boards\n(.*?)^# END Fluent Boards$/ms', $contents, $blocks) === 1) { |
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$existingRules = array_values(array_filter(array_map('trim', explode("\n", $blocks[1][0])), function ($line) { |
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return $line !== '' && strpos($line, '#') !== 0; |
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})); |
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if ($existingRules === $rules) { |
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return true; |
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} |
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} |
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} |
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|
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if (!function_exists('insert_with_markers')) { |
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require_once ABSPATH . 'wp-admin/includes/misc.php'; |
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} |
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|
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if (insert_with_markers($path, 'Fluent Boards', $rules)) { |
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return true; |
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} |
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|
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// Unmarked, locked host rules and server-level restrictions need no rewrite. |
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return $this->_checkUploadProtection($allowProbe) === true; |
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} |
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|
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/** |
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* Probe direct access without login cookies using a harmless temporary file. |
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* Return true for denied access, false for exposure, or null when unverified. |
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* Pass false to read only the cache and schedule a missing check in cron. |
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*/ |
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public function _checkUploadProtection($allowProbe = true) |
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{ |
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$directory = (new static())->_getDir(); |
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$uploads = wp_upload_dir(); |
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$folder = apply_filters('fluent_boards/upload_folder_name', FLUENT_BOARDS_UPLOAD_DIR); |
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$url = trailingslashit($uploads['baseurl']) . trim($folder, '/'); |
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$rulesPath = $directory . '/.htaccess'; |
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$rulesHash = is_file($rulesPath) && is_readable($rulesPath) ? hash_file('sha256', $rulesPath) : ''; |
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$cacheKey = Constant::UPLOAD_PROTECTION_CHECK_PREFIX . md5($directory . '|' . $url); |
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$cached = get_transient($cacheKey); |
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if (is_array($cached) && isset($cached['rules_hash']) && $cached['rules_hash'] === $rulesHash && array_key_exists('blocked', $cached)) { |
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return $cached['blocked']; |
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} |
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|
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if (!$allowProbe) { |
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$hook = 'fluent_boards/check_upload_protection'; |
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if (!wp_next_scheduled($hook)) { |
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wp_schedule_single_event(time(), $hook); |
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} |
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return null; |
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} |
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|
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$blocked = null; |
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$filename = 'fbs-access-check-' . wp_generate_uuid4() . '.txt'; |
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$path = trailingslashit($directory) . $filename; |
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$contents = wp_generate_uuid4(); |
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try { |
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if (is_dir($directory) && is_writable($directory) |
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&& file_put_contents($path, $contents, LOCK_EX) === strlen($contents)) { |
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// The upload URL comes from trusted site configuration, never request input. |
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$response = wp_remote_get($url . '/' . $filename, [ |
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'timeout' => 5, |
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'redirection' => 0, |
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'limit_response_size' => 1024, |
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'headers' => ['Cache-Control' => 'no-cache'], |
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]); |
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if (!is_wp_error($response)) { |
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$status = wp_remote_retrieve_response_code($response); |
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if (in_array($status, [403, 404], true)) { |
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$blocked = true; |
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} elseif ($status === 200 && wp_remote_retrieve_body($response) === $contents) { |
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$blocked = false; |
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} |
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} |
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} |
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} finally { |
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if (is_file($path)) { |
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wp_delete_file($path); |
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} |
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} |
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|
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set_transient($cacheKey, ['rules_hash' => $rulesHash, 'blocked' => $blocked], 5 * MINUTE_IN_SECONDS); |
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return $blocked; |
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} |
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|
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/** |
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* Get absolute path of file using custom upload dir name of this application |
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* @return string [file path] |
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*/ |
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public function _getAbsolutePathOfFile($file) |
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{ |
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return $this->_getDir() . DIRECTORY_SEPARATOR . $file; |
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} |
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|
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/** |
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* Resolve a stored attachment path only when it belongs to Fluent Boards uploads. |
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* |
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* @param string $storedPath |
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* @param int|null $boardId |
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* @return string|null |
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*/ |
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public function _resolveLocalAttachmentPath($storedPath, $boardId = null) |
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{ |
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if (!$storedPath) { |
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return null; |
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} |
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|
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$storedFilename = rawurldecode((string) $storedPath); |
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$isBareFilename = $storedFilename !== '' |
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&& strpos($storedFilename, '/') === false |
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&& strpos($storedFilename, '\\') === false; |
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|
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if ($isBareFilename && $boardId === null) { |
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return null; |
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} |
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|
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$filePath = $isBareFilename ? null : realpath($storedPath); |
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$allowedDirectory = $this->_getDir(); |
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$pluginRoot = realpath($allowedDirectory); |
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|
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if (!$pluginRoot) { |
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return null; |
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} |
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|
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$pluginRoot = rtrim($pluginRoot, DIRECTORY_SEPARATOR); |
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$allowedRoot = $pluginRoot; |
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|
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if ($boardId !== null) { |
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if (!is_int($boardId) && !is_string($boardId)) { |
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return null; |
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} |
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|
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$boardId = filter_var($boardId, FILTER_VALIDATE_INT, [ |
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'options' => ['min_range' => 1], |
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]); |
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if ($boardId === false) { |
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return null; |
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} |
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|
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$allowedDirectory .= DIRECTORY_SEPARATOR . 'board_' . $boardId; |
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if (is_link($allowedDirectory)) { |
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return null; |
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} |
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|
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$allowedRoot = realpath($allowedDirectory); |
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$expectedBoardRoot = $pluginRoot . DIRECTORY_SEPARATOR . 'board_' . $boardId; |
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if (!$allowedRoot || $allowedRoot !== $expectedBoardRoot) { |
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return null; |
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} |
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} |
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|
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if ($isBareFilename) { |
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$filePath = realpath($allowedDirectory . DIRECTORY_SEPARATOR . $storedFilename); |
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} |
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|
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if (!$filePath || !$allowedRoot || !is_file($filePath)) { |
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return null; |
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} |
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|
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$allowedRoot = rtrim($allowedRoot, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR; |
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|
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return strpos($filePath, $allowedRoot) === 0 ? $filePath : null; |
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} |
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|
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/** |
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* Upload request files into the application's custom upload directory. |
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* @return array |
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*/ |
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public function _uploadFromRequest() |
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{ |
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return $this->_put(FluentBoards('request')->files()); |
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} |
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|
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/** |
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* Prepare upload-directory protection before accepting local files. |
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* @param array $files |
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* @return array |
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*/ |
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public function _put($files) |
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{ |
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if (!$this->_installUploadProtectionRules()) { |
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throw new Exception(__('Could not prepare upload-directory protection. Please ask your hosting provider to block direct file access and check directory permissions.', 'fluent-boards')); |
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} |
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|
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if (!function_exists('wp_handle_upload')) { |
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require_once(ABSPATH . 'wp-admin/includes/file.php'); |
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} |
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|
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$this->overrideUploadDir(); |
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|
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$uploadOverrides = [ |
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'test_form' => false, |
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// Accept the same allow-list FluentBoards validates against, so wp_handle_upload |
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// doesn't reject broader types (e.g. .json, .md) by extension. |
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'mimes' => \FluentBoards\App\Services\UploadService::getAllowedMimeMap(), |
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]; |
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$uploadedFiles = []; // Initialize the array |
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|
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if(is_object($files)) { |
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$files = [$files]; |
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} |
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|
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foreach ((array)$files as $file) { |
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|
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$filesArray = $file->toArray(); |
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|
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// tmp_name is the path to the uploaded file which is required for wp_handle_upload, new framework update |
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// changed the way to get the tmp_name Reference to line # 448 in File.php |
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$filesArray['tmp_name'] = $file->getRealPath(); |
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|
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$extraData = Arr::only($filesArray, ['name', 'size']); |
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$uploadsData = \wp_handle_upload($filesArray, $uploadOverrides); |
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// Add the full path to the file |
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$uploadsData['full_path'] = $this->_getAbsolutePathOfFile($uploadsData['file']); |
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$uploadedFiles[] = array_merge($extraData, $uploadsData); |
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} |
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|
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return $uploadedFiles; |
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} |
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|
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/** |
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* Delete a file from custom upload directory of this application |
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* @param array $files |
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* @return void |
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*/ |
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public function _delete($files) |
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{ |
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$files = (array)$files; |
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|
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foreach ($files as $file) { |
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$arr = explode('/', $file); |
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$fileName = end($arr); |
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$filePath = $this->getDir() . '/' . $fileName; |
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if (file_exists($filePath)) { |
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wp_delete_file($filePath); |
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} |
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} |
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} |
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|
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/** |
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* Register filters for custom upload dir |
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*/ |
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public function _overrideUploadDir() |
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{ |
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add_filter('wp_handle_upload_prefilter', function ($file) { |
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add_filter('upload_dir', [$this, '_setCustomUploadDir']); |
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|
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add_filter('wp_handle_upload', function ($fileinfo) { |
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remove_filter('upload_dir', [$this, '_setCustomUploadDir']); |
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$fileinfo['file'] = basename($fileinfo['file']); |
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return $fileinfo; |
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}); |
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|
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return $this->_renameFileName($file); |
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}); |
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} |
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|
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/** |
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* Set plugin's custom upload dir |
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* @param array $param |
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* @return array $param |
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*/ |
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public function _setCustomUploadDir($param) |
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{ |
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$fbsUploadDir = apply_filters('fluent_boards/upload_folder_name', FLUENT_BOARDS_UPLOAD_DIR); |
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|
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if ($this->subDir) { |
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$fbsUploadDir .= DIRECTORY_SEPARATOR . $this->subDir; |
| 351 |
if (!is_dir($param['basedir'] . $fbsUploadDir)) { |
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// phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_mkdir -- Creating custom upload subdirectory during upload process, WP_Filesystem not initialized |
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@mkdir($param['basedir'] . $fbsUploadDir, 0755); |
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} |
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} |
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|
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$param['url'] = $param['baseurl'] . DIRECTORY_SEPARATOR . $fbsUploadDir; |
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|
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$param['path'] = $param['basedir'] . DIRECTORY_SEPARATOR . $fbsUploadDir; |
| 360 |
|
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return $param; |
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} |
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|
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/** |
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* Rename the uploaded file name before saving |
| 366 |
* @param array $file |
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* @return array $file |
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*/ |
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public function _renameFileName($file) |
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{ |
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$prefix = wp_generate_uuid4() . '-'; |
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$prefix = apply_filters('fluent_boards/uploaded_file_name_prefix', $prefix); |
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$file['name'] = $prefix . $file['name']; |
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|
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return $file; |
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} |
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|
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public function _deleteDir($dir) |
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{ |
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$dir = $this->getDir() . DIRECTORY_SEPARATOR . $dir; |
| 381 |
if (is_dir($dir)) { |
| 382 |
$this->deleteContents($dir); |
| 383 |
} |
| 384 |
} |
| 385 |
|
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/** |
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* Delete a directory and its content |
| 388 |
* Lead Note: this method should be called via scheduler or queue |
| 389 |
* @param string $dir |
| 390 |
* @return bool |
| 391 |
*/ |
| 392 |
private function deleteContents($dir) |
| 393 |
{ |
| 394 |
$files = array_diff(scandir($dir), ['.', '..']); |
| 395 |
foreach ($files as $file) { |
| 396 |
if(is_dir("$dir/$file")) { |
| 397 |
// Recursively delete subdirectory |
| 398 |
$this->deleteContents("$dir/$file"); |
| 399 |
} else { |
| 400 |
// Delete file |
| 401 |
// phpcs:ignore WordPress.WP.AlternativeFunctions.unlink_unlink -- Recursive directory cleanup, direct file operations required |
| 402 |
unlink("$dir/$file"); |
| 403 |
} |
| 404 |
} |
| 405 |
// Delete the directory itself. If the directory is not empty, it will not be deleted. |
| 406 |
// phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_rmdir -- Recursive directory removal, WP_Filesystem not suitable for this operation |
| 407 |
return rmdir($dir); |
| 408 |
} |
| 409 |
|
| 410 |
public static function __callStatic($method, $params) |
| 411 |
{ |
| 412 |
$instance = new static; |
| 413 |
|
| 414 |
return call_user_func_array([$instance, $method], $params); |
| 415 |
} |
| 416 |
|
| 417 |
public function __call($method, $params) |
| 418 |
{ |
| 419 |
$hiddenMethod = "_" . $method; |
| 420 |
|
| 421 |
$method = method_exists($this, $hiddenMethod) ? $hiddenMethod : $method; |
| 422 |
|
| 423 |
return call_user_func_array([$this, $method], $params); |
| 424 |
} |
| 425 |
} |
| 426 |
|
