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<?php |
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/** |
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* Copyright (c) 2015 Victor Dubiniuk <[email protected]> |
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* This file is licensed under the Affero General Public License version 3 or |
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* later. |
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* See the COPYING-README file. |
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*/ |
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namespace OCA\Files_Antivirus; |
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use OC\Files\View; |
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use OCP\App; |
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use OCP\IL10N; |
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use OCA\Files_Antivirus\Status; |
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use OCA\Files_Antivirus\Activity; |
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class Item implements IScannable{ |
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/** |
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* Scanned fileid (optional) |
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* @var int |
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*/ |
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protected $id; |
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/** |
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* File view |
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* @var \OC\Files\View |
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*/ |
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protected $view; |
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/** |
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* Path relative to the view |
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* @var string |
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*/ |
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protected $path; |
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/** |
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* file handle, user to read from the file |
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* @var resource |
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*/ |
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protected $fileHandle; |
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/** |
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* Portion size |
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* @var int |
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*/ |
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protected $chunkSize; |
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/** |
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* Is filesize match the size conditions |
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* @var bool |
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*/ |
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protected $isValidSize; |
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/** |
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* @var IL10N |
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*/ |
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private $l10n; |
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public function __construct(IL10N $l10n, View $view, $path, $id = null) { |
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$this->l10n = $l10n; |
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if (!is_object($view)){ |
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$this->logError('Can\'t init filesystem view.', $id, $path); |
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throw new \RuntimeException(); |
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} |
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if(!$view->file_exists($path)) { |
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$this->logError('File does not exist.', $id, $path); |
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throw new \RuntimeException(); |
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} |
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if (is_null($id)){ |
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$this->id = $view->getFileInfo($path)->getId(); |
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} else { |
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$this->id = $id; |
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} |
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$this->view = $view; |
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$this->path = $path; |
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$this->isValidSize = $view->filesize($path) > 0; |
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$application = new AppInfo\Application(); |
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$config = $application->getContainer()->query('AppConfig'); |
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$this->chunkSize = $config->getAvChunkSize(); |
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} |
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/** |
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* Is this file good for scanning? |
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* @return boolean |
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*/ |
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public function isValid() { |
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$isValid = !$this->view->is_dir($this->path) && $this->isValidSize; |
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return $isValid; |
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} |
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/** |
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* Reads a file portion by portion until the very end |
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* @return string|boolean |
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*/ |
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public function fread() { |
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if (!$this->isValid()) { |
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return false; |
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} |
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if (is_null($this->fileHandle)) { |
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$this->getFileHandle(); |
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} |
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if (!is_null($this->fileHandle) && !$this->feof()) { |
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$chunk = fread($this->fileHandle, $this->chunkSize); |
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return $chunk; |
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} |
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return false; |
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} |
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/** |
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* Action to take if this item is infected |
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* @param Status $status |
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* @param boolean $isBackground |
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*/ |
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public function processInfected(Status $status, $isBackground) { |
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$application = new AppInfo\Application(); |
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$appConfig = $application->getContainer()->query('AppConfig'); |
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$infectedAction = $appConfig->getAvInfectedAction(); |
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$shouldDelete = !$isBackground || ($isBackground && $infectedAction === 'delete'); |
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$message = $shouldDelete ? Activity::MESSAGE_FILE_DELETED : ''; |
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\OC::$server->getActivityManager()->publishActivity( |
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'files_antivirus', |
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Activity::SUBJECT_VIRUS_DETECTED, |
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array($this->path, $status->getDetails()), |
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$message, |
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array(), |
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$this->path, |
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'', |
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$this->view->getOwner($this->path), |
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Activity::TYPE_VIRUS_DETECTED, |
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Activity::PRIORITY_HIGH |
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); |
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if ($isBackground) { |
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if ($shouldDelete) { |
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$this->logError('Infected file deleted. ' . $status->getDetails()); |
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$this->deleteFile(); |
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} else { |
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$this->logError('File is infected. ' . $status->getDetails()); |
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} |
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} else { |
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$this->logError('Virus(es) found: ' . $status->getDetails()); |
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//remove file |
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$this->deleteFile(); |
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Notification::sendMail($this->path); |
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$message = $this->l10n->t( |
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"Virus detected! Can't upload the file %s", |
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array(basename($this->path)) |
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); |
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\OCP\JSON::error(array("data" => array( "message" => $message))); |
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exit(); |
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} |
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} |
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/** |
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* Action to take if this item status is unclear |
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* @param Status $status |
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* @param boolean $isBackground |
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*/ |
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public function processUnchecked(Status $status, $isBackground) { |
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//TODO: Show warning to the user: The file can not be checked |
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$this->logError('Not Checked. ' . $status->getDetails()); |
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} |
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/** |
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* Action to take if this item status is not infected |
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* @param Status $status |
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* @param boolean $isBackground |
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*/ |
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public function processClean(Status $status, $isBackground) { |
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if (!$isBackground) { |
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return; |
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} |
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try { |
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$stmt = \OCP\DB::prepare('DELETE FROM `*PREFIX*files_antivirus` WHERE `fileid` = ?'); |
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$result = $stmt->execute(array($this->id)); |
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if (\OCP\DB::isError($result)) { |
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//TODO: Use logger |
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$this->logError(__METHOD__. ', DB error: ' . \OCP\DB::getErrorMessage()); |
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} |
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$stmt = \OCP\DB::prepare('INSERT INTO `*PREFIX*files_antivirus` (`fileid`, `check_time`) VALUES (?, ?)'); |
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$result = $stmt->execute(array($this->id, time())); |
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if (\OCP\DB::isError($result)) { |
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$this->logError(__METHOD__. ', DB error: ' . \OCP\DB::getErrorMessage()); |
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} |
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} catch(\Exception $e) { |
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\OCP\Util::writeLog('files_antivirus', __METHOD__.', exception: '.$e->getMessage(), \OCP\Util::ERROR); |
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} |
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} |
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/** |
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* Check if the end of file is reached |
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* @return boolean |
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*/ |
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private function feof() { |
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$isDone = feof($this->fileHandle); |
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if ($isDone) { |
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$this->logDebug('Scan is done'); |
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fclose($this->fileHandle); |
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$this->fileHandle = null; |
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} |
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return $isDone; |
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} |
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/** |
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* Opens a file for reading |
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* @throws \RuntimeException |
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*/ |
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private function getFileHandle() { |
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$fileHandle = $this->view->fopen($this->path, "r"); |
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if ($fileHandle === false) { |
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$this->logError('Can not open for reading.', $this->id, $this->path); |
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throw new \RuntimeException(); |
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} else { |
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$this->logDebug('Scan started'); |
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$this->fileHandle = $fileHandle; |
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} |
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} |
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/** |
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* Delete infected file |
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*/ |
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private function deleteFile() { |
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//prevent from going to trashbin |
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if (App::isEnabled('files_trashbin')) { |
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\OCA\Files_Trashbin\Storage::preRenameHook([]); |
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} |
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$this->view->unlink($this->path); |
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if (App::isEnabled('files_trashbin')) { |
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\OCA\Files_Trashbin\Storage::postRenameHook([]); |
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} |
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} |
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/** |
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* @param string $message |
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*/ |
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public function logDebug($message) { |
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$extra = ' File: ' . $this->id |
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. 'Account: ' . $this->view->getOwner($this->path) |
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. ' Path: ' . $this->path; |
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\OCP\Util::writeLog('files_antivirus', $message . $extra, \OCP\Util::DEBUG); |
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} |
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/** |
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* @param string $message |
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* @param int $id optional |
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* @param string $path optional |
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*/ |
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public function logError($message, $id=null, $path=null) { |
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$ownerInfo = is_null($this->view) ? '' : 'Account: ' . $this->view->getOwner($path); |
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$extra = ' File: ' . (is_null($id) ? $this->id : $id) |
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. $ownerInfo |
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. ' Path: ' . (is_null($path) ? $this->path : $path); |
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\OCP\Util::writeLog( |
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'files_antivirus', |
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$message . $extra, |
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\OCP\Util::ERROR |
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); |
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} |
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} |
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nextcloud /
files_antivirus
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This check looks from parameters that have been defined for a function or method, but which are not used in the method body.