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Detect aborted connection in OC\Files\View and stop writing data to the output buffer

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Signed-off-by: Benjamin Gaussorgues <benjamin.gaussorgues@nextcloud.com>
This commit is contained in:
Benjamin Gaussorgues 2023-09-06 09:16:55 +02:00 committed by Côme Chilliet
parent 80a4b369f8
commit 003d0dec93
5 changed files with 51 additions and 2 deletions
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1
lib/composer/composer/autoload_classmap.php
View file

@ -302,6 +302,7 @@ return array(
'OCP\\Files\\Config\\IMountProviderCollection' => $baseDir . '/lib/public/Files/Config/IMountProviderCollection.php',
'OCP\\Files\\Config\\IRootMountProvider' => $baseDir . '/lib/public/Files/Config/IRootMountProvider.php',
'OCP\\Files\\Config\\IUserMountCache' => $baseDir . '/lib/public/Files/Config/IUserMountCache.php',
'OCP\\Files\\ConnectionLostException' => $baseDir . '/lib/public/Files/ConnectionLostException.php',
'OCP\\Files\\DavUtil' => $baseDir . '/lib/public/Files/DavUtil.php',
'OCP\\Files\\EmptyFileNameException' => $baseDir . '/lib/public/Files/EmptyFileNameException.php',
'OCP\\Files\\EntityTooLargeException' => $baseDir . '/lib/public/Files/EntityTooLargeException.php',

1
lib/composer/composer/autoload_static.php
View file

@ -335,6 +335,7 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
'OCP\\Files\\Config\\IMountProviderCollection' => __DIR__ . '/../../..' . '/lib/public/Files/Config/IMountProviderCollection.php',
'OCP\\Files\\Config\\IRootMountProvider' => __DIR__ . '/../../..' . '/lib/public/Files/Config/IRootMountProvider.php',
'OCP\\Files\\Config\\IUserMountCache' => __DIR__ . '/../../..' . '/lib/public/Files/Config/IUserMountCache.php',
'OCP\\Files\\ConnectionLostException' => __DIR__ . '/../../..' . '/lib/public/Files/ConnectionLostException.php',
'OCP\\Files\\DavUtil' => __DIR__ . '/../../..' . '/lib/public/Files/DavUtil.php',
'OCP\\Files\\EmptyFileNameException' => __DIR__ . '/../../..' . '/lib/public/Files/EmptyFileNameException.php',
'OCP\\Files\\EntityTooLargeException' => __DIR__ . '/../../..' . '/lib/public/Files/EntityTooLargeException.php',

14
lib/private/Files/View.php
View file

@ -56,6 +56,7 @@ use OC\User\Manager as UserManager;
use OCA\Files_Sharing\SharedMount;
use OCP\Constants;
use OCP\Files\Cache\ICacheEntry;
use OCP\Files\ConnectionLostException;
use OCP\Files\EmptyFileNameException;
use OCP\Files\FileNameTooLongException;
use OCP\Files\InvalidCharacterInPathException;
@ -397,10 +398,11 @@ class View {
}
$handle = $this->fopen($path, 'rb');
if ($handle) {
$chunkSize = 524288; // 512 kB chunks
$chunkSize = 524288; // 512 kiB chunks
while (!feof($handle)) {
echo fread($handle, $chunkSize);
flush();
$this->checkConnectionStatus();
}
fclose($handle);
return $this->filesize($path);
@ -423,7 +425,7 @@ class View {
}
$handle = $this->fopen($path, 'rb');
if ($handle) {
$chunkSize = 524288; // 512 kB chunks
$chunkSize = 524288; // 512 kiB chunks
$startReading = true;
if ($from !== 0 && $from !== '0' && fseek($handle, $from) !== 0) {
@ -453,6 +455,7 @@ class View {
}
echo fread($handle, $len);
flush();
$this->checkConnectionStatus();
}
return ftell($handle) - $from;
}
@ -462,6 +465,13 @@ class View {
return false;
}
private function checkConnectionStatus(): void {
$connectionStatus = \connection_status();
if ($connectionStatus !== CONNECTION_NORMAL) {
throw new ConnectionLostException("Connection lost. Status: $connectionStatus");
}
}
/**
* @param string $path
* @return mixed

4
lib/private/legacy/OC_Files.php
View file

@ -230,6 +230,10 @@ class OC_Files {
OC::$server->getLogger()->logException($ex);
$l = \OC::$server->getL10N('lib');
\OC_Template::printErrorPage($l->t('Cannot download file'), $ex->getMessage(), 200);
} catch (\OCP\Files\ConnectionLostException $ex) {
self::unlockAllTheFiles($dir, $files, $getType, $view, $filename);
OC::$server->getLogger()->logException($ex, ['level' => \OCP\ILogger::DEBUG]);
\OC_Template::printErrorPage('Connection lost', $ex->getMessage(), 200);
} catch (\Exception $ex) {
self::unlockAllTheFiles($dir, $files, $getType, $view, $filename);
OC::$server->getLogger()->logException($ex);

33
lib/public/Files/ConnectionLostException.php Normal file
View file

@ -0,0 +1,33 @@
<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Côme Chilliet <come.chilliet@nextcloud.com>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCP\Files;
/**
* Exception for lost connection with the
* @since 25.0.11
*/
class ConnectionLostException extends \RuntimeException {
}