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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 OCA\Files_Antivirus\Activity\Provider; |
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use OCA\Files_Antivirus\AppInfo\Application; |
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use OCA\Files_Antivirus\Db\ItemMapper; |
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use OCP\Activity\IManager as ActivityManager; |
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use OCP\App; |
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use OCP\AppFramework\Db\DoesNotExistException; |
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use OCP\Files\File; |
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use OCP\IL10N; |
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use OCP\ILogger; |
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class Item implements IScannable{ |
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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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/** @var IL10N */ |
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private $l10n; |
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/** @var AppConfig */ |
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private $config; |
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/** @var ActivityManager */ |
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private $activityManager; |
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/** @var ItemMapper */ |
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private $itemMapper; |
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/** @var ILogger */ |
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private $logger; |
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/** @var File */ |
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private $file; |
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public function __construct(IL10N $l10n, File $file) { |
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$this->l10n = $l10n; |
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$this->file = $file; |
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$application = new AppInfo\Application(); |
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$this->config = $application->getContainer()->query(AppConfig::class); |
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$this->activityManager = \OC::$server->getActivityManager(); |
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$this->itemMapper = $application->getContainer()->query(ItemMapper::class); |
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$this->logger = \OC::$server->getLogger(); |
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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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return $this->file->getSize() > 0; |
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} |
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/** |
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* Reads a file portion by portion until the very end |
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* @return string|boolean |
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*/ |
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public function fread() { |
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if (!$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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return fread($this->fileHandle, $this->config->getAvChunkSize()); |
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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, $isBackground) { |
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$infectedAction = $this->config->getAvInfectedAction(); |
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$shouldDelete = !$isBackground || ($isBackground && $infectedAction === 'delete'); |
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$message = $shouldDelete ? Provider::MESSAGE_FILE_DELETED : ''; |
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$activity = $this->activityManager->generateEvent(); |
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$activity->setApp(Application::APP_NAME) |
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->setSubject(Provider::SUBJECT_VIRUS_DETECTED, [$this->file->getPath(), $status->getDetails()]) |
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->setMessage($message) |
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->setObject('file', $this->file->getId(), $this->file->getPath()) |
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->setAffectedUser($this->file->getOwner()->getUID()) |
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->setType(Provider::TYPE_VIRUS_DETECTED); |
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$this->activityManager->publish($activity); |
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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($this->file->getPath()); |
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$message = $this->l10n->t( |
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"Virus detected! Can't upload the file %s", |
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[$this->file->getName()] |
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); |
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\OCP\JSON::error(['data' => ['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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try { |
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$item = $this->itemMapper->findByFileId($this->file->getId()); |
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$this->itemMapper->delete($item); |
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} catch (DoesNotExistException $e) { |
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//Just ignore |
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} |
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$item = new \OCA\Files_Antivirus\Db\Item(); |
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$item->setFileid($this->file->getId()); |
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$item->setCheckTime(time()); |
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$this->itemMapper->insert($item); |
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} catch(\Exception $e) { |
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$this->logger->error(__METHOD__.', exception: '.$e->getMessage(), ['app' => 'files_antivirus']); |
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} |
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} |
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/** |
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* Check if the end of file is reached |
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* @return boolean |
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*/ |
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private function feof() { |
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$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 = $this->file->fopen('r'); |
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if ($fileHandle === false) { |
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$this->logError('Can not open for reading.'); |
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throw new \RuntimeException(); |
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} |
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$this->logDebug('Scan started'); |
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$this->fileHandle = $fileHandle; |
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} |
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/** |
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* Delete infected file |
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*/ |
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private function deleteFile() { |
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//prevent from going to trashbin |
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if (App::isEnabled('files_trashbin')) { |
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\OCA\Files_Trashbin\Storage::preRenameHook([]); |
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} |
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$this->file->delete(); |
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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->file->getId() |
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. 'Account: ' . $this->file->getOwner()->getUID() |
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. ' Path: ' . $this->file->getPath(); |
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$this->logger->debug($message . $extra, ['app' => 'files_antivirus']); |
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} |
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/** |
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* @param string $message |
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*/ |
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public function logError($message) { |
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$ownerInfo = 'Account: ' . $this->file->getOwner()->getUID(); |
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$extra = ' File: ' . $this->file->getId() |
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. $ownerInfo |
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. ' Path: ' . $this->file->getPath(); |
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$this->logger->error($message . $extra, ['app' => 'files_antivirus']); |
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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.