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Merge pull request #40499 from nextcloud/known-mtime-wrapper
add wrapper for external storage to ensure we don't get an mtime that is lower than we know it is
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| <?php | ||
|
|
||
| namespace OC\Files\Storage\Wrapper; | ||
|
|
||
| use OCP\Cache\CappedMemoryCache; | ||
| use OCP\Files\Storage\IStorage; | ||
| use Psr\Clock\ClockInterface; | ||
|
|
||
| /** | ||
| * Wrapper that overwrites the mtime return by stat/getMetaData if the returned value | ||
| * is lower than when we last modified the file. | ||
| * | ||
| * This is useful because some storage servers can return an outdated mtime right after writes | ||
| */ | ||
| class KnownMtime extends Wrapper { | ||
| private CappedMemoryCache $knowMtimes; | ||
| private ClockInterface $clock; | ||
|
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| public function __construct($arguments) { | ||
| parent::__construct($arguments); | ||
| $this->knowMtimes = new CappedMemoryCache(); | ||
| $this->clock = $arguments['clock']; | ||
| } | ||
|
|
||
| public function file_put_contents($path, $data) { | ||
| $result = parent::file_put_contents($path, $data); | ||
| if ($result) { | ||
| $now = $this->clock->now()->getTimestamp(); | ||
| $this->knowMtimes->set($path, $this->clock->now()->getTimestamp()); | ||
| } | ||
| return $result; | ||
| } | ||
|
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| public function stat($path) { | ||
| $stat = parent::stat($path); | ||
| if ($stat) { | ||
| $this->applyKnownMtime($path, $stat); | ||
| } | ||
| return $stat; | ||
| } | ||
|
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| public function getMetaData($path) { | ||
| $stat = parent::getMetaData($path); | ||
| if ($stat) { | ||
| $this->applyKnownMtime($path, $stat); | ||
| } | ||
| return $stat; | ||
| } | ||
|
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| private function applyKnownMtime(string $path, array &$stat) { | ||
| if (isset($stat['mtime'])) { | ||
| $knownMtime = $this->knowMtimes->get($path) ?? 0; | ||
| $stat['mtime'] = max($stat['mtime'], $knownMtime); | ||
| } | ||
| } | ||
|
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| public function filemtime($path) { | ||
| $knownMtime = $this->knowMtimes->get($path) ?? 0; | ||
| return max(parent::filemtime($path), $knownMtime); | ||
| } | ||
|
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| public function mkdir($path) { | ||
| $result = parent::mkdir($path); | ||
| if ($result) { | ||
| $this->knowMtimes->set($path, $this->clock->now()->getTimestamp()); | ||
| } | ||
| return $result; | ||
| } | ||
|
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| public function rmdir($path) { | ||
| $result = parent::rmdir($path); | ||
| if ($result) { | ||
| $this->knowMtimes->set($path, $this->clock->now()->getTimestamp()); | ||
| } | ||
| return $result; | ||
| } | ||
|
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| public function unlink($path) { | ||
| $result = parent::unlink($path); | ||
| if ($result) { | ||
| $this->knowMtimes->set($path, $this->clock->now()->getTimestamp()); | ||
| } | ||
| return $result; | ||
| } | ||
|
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||
| public function rename($source, $target) { | ||
| $result = parent::rename($source, $target); | ||
| if ($result) { | ||
| $this->knowMtimes->set($target, $this->clock->now()->getTimestamp()); | ||
| $this->knowMtimes->set($source, $this->clock->now()->getTimestamp()); | ||
| } | ||
| return $result; | ||
| } | ||
|
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||
| public function copy($source, $target) { | ||
| $result = parent::copy($source, $target); | ||
| if ($result) { | ||
| $this->knowMtimes->set($target, $this->clock->now()->getTimestamp()); | ||
| } | ||
| return $result; | ||
| } | ||
|
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| public function fopen($path, $mode) { | ||
| $result = parent::fopen($path, $mode); | ||
| if ($result && $mode === 'w') { | ||
| $this->knowMtimes->set($path, $this->clock->now()->getTimestamp()); | ||
| } | ||
| return $result; | ||
| } | ||
|
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| public function touch($path, $mtime = null) { | ||
| $result = parent::touch($path, $mtime); | ||
| if ($result) { | ||
| $this->knowMtimes->set($path, $mtime ?? $this->clock->now()->getTimestamp()); | ||
| } | ||
| return $result; | ||
| } | ||
|
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| public function copyFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath) { | ||
| $result = parent::copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath); | ||
| if ($result) { | ||
| $this->knowMtimes->set($targetInternalPath, $this->clock->now()->getTimestamp()); | ||
| } | ||
| return $result; | ||
| } | ||
|
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| public function moveFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath) { | ||
| $result = parent::moveFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath); | ||
| if ($result) { | ||
| $this->knowMtimes->set($targetInternalPath, $this->clock->now()->getTimestamp()); | ||
| } | ||
| return $result; | ||
| } | ||
|
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| public function writeStream(string $path, $stream, int $size = null): int { | ||
| $result = parent::writeStream($path, $stream, $size); | ||
| if ($result) { | ||
| $this->knowMtimes->set($path, $this->clock->now()->getTimestamp()); | ||
| } | ||
| return $result; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| <?php | ||
| /** | ||
| * Copyright (c) 2014 Robin Appelman <icewind@owncloud.com> | ||
| * This file is licensed under the Affero General Public License version 3 or | ||
| * later. | ||
| * See the COPYING-README file. | ||
| */ | ||
|
|
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| namespace lib\Files\Storage\Wrapper; | ||
|
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| use OC\Files\Storage\Temporary; | ||
| use OC\Files\Storage\Wrapper\KnownMtime; | ||
| use PHPUnit\Framework\MockObject\MockObject; | ||
| use Psr\Clock\ClockInterface; | ||
| use Test\Files\Storage\Storage; | ||
|
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| /** | ||
| * @group DB | ||
| */ | ||
| class KnownMtimeTest extends Storage { | ||
| /** @var Temporary */ | ||
| private $sourceStorage; | ||
|
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| /** @var ClockInterface|MockObject */ | ||
| private $clock; | ||
| private int $fakeTime = 0; | ||
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| protected function setUp(): void { | ||
| parent::setUp(); | ||
| $this->fakeTime = 0; | ||
| $this->sourceStorage = new Temporary([]); | ||
| $this->clock = $this->createMock(ClockInterface::class); | ||
| $this->clock->method('now')->willReturnCallback(function () { | ||
| if ($this->fakeTime) { | ||
| return new \DateTimeImmutable("@{$this->fakeTime}"); | ||
| } else { | ||
| return new \DateTimeImmutable(); | ||
| } | ||
| }); | ||
| $this->instance = $this->getWrappedStorage(); | ||
| } | ||
|
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| protected function tearDown(): void { | ||
| $this->sourceStorage->cleanUp(); | ||
| parent::tearDown(); | ||
| } | ||
|
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| protected function getWrappedStorage() { | ||
| return new KnownMtime([ | ||
| 'storage' => $this->sourceStorage, | ||
| 'clock' => $this->clock, | ||
| ]); | ||
| } | ||
|
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| public function testNewerKnownMtime() { | ||
| $future = time() + 1000; | ||
| $this->fakeTime = $future; | ||
|
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| $this->instance->file_put_contents('foo.txt', 'bar'); | ||
|
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| // fuzzy match since the clock might have ticked | ||
| $this->assertLessThan(2, abs(time() - $this->sourceStorage->filemtime('foo.txt'))); | ||
| $this->assertEquals($this->sourceStorage->filemtime('foo.txt'), $this->sourceStorage->stat('foo.txt')['mtime']); | ||
| $this->assertEquals($this->sourceStorage->filemtime('foo.txt'), $this->sourceStorage->getMetaData('foo.txt')['mtime']); | ||
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| $this->assertEquals($future, $this->instance->filemtime('foo.txt')); | ||
| $this->assertEquals($future, $this->instance->stat('foo.txt')['mtime']); | ||
| $this->assertEquals($future, $this->instance->getMetaData('foo.txt')['mtime']); | ||
| } | ||
| } |