Merge pull request #20939 from nextcloud/enh/middleware/not_modified

Move not modified check to the middleware

9 files changed, 169 insertions, 61 deletions

diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index 718e27c78fa..c7b966fd595 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -532,6 +532,7 @@ return array(
     'OC\\AppFramework\\Middleware\\AdditionalScriptsMiddleware' => $baseDir . '/lib/private/AppFramework/Middleware/AdditionalScriptsMiddleware.php',
     'OC\\AppFramework\\Middleware\\CompressionMiddleware' => $baseDir . '/lib/private/AppFramework/Middleware/CompressionMiddleware.php',
     'OC\\AppFramework\\Middleware\\MiddlewareDispatcher' => $baseDir . '/lib/private/AppFramework/Middleware/MiddlewareDispatcher.php',
+    'OC\\AppFramework\\Middleware\\NotModifiedMiddleware' => $baseDir . '/lib/private/AppFramework/Middleware/NotModifiedMiddleware.php',
     'OC\\AppFramework\\Middleware\\OCSMiddleware' => $baseDir . '/lib/private/AppFramework/Middleware/OCSMiddleware.php',
     'OC\\AppFramework\\Middleware\\PublicShare\\Exceptions\\NeedAuthenticationException' => $baseDir . '/lib/private/AppFramework/Middleware/PublicShare/Exceptions/NeedAuthenticationException.php',
     'OC\\AppFramework\\Middleware\\PublicShare\\PublicShareMiddleware' => $baseDir . '/lib/private/AppFramework/Middleware/PublicShare/PublicShareMiddleware.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index aa0528b1761..8212d3dafc3 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -561,6 +561,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OC\\AppFramework\\Middleware\\AdditionalScriptsMiddleware' => __DIR__ . '/../../..' . '/lib/private/AppFramework/Middleware/AdditionalScriptsMiddleware.php',
         'OC\\AppFramework\\Middleware\\CompressionMiddleware' => __DIR__ . '/../../..' . '/lib/private/AppFramework/Middleware/CompressionMiddleware.php',
         'OC\\AppFramework\\Middleware\\MiddlewareDispatcher' => __DIR__ . '/../../..' . '/lib/private/AppFramework/Middleware/MiddlewareDispatcher.php',
+        'OC\\AppFramework\\Middleware\\NotModifiedMiddleware' => __DIR__ . '/../../..' . '/lib/private/AppFramework/Middleware/NotModifiedMiddleware.php',
         'OC\\AppFramework\\Middleware\\OCSMiddleware' => __DIR__ . '/../../..' . '/lib/private/AppFramework/Middleware/OCSMiddleware.php',
         'OC\\AppFramework\\Middleware\\PublicShare\\Exceptions\\NeedAuthenticationException' => __DIR__ . '/../../..' . '/lib/private/AppFramework/Middleware/PublicShare/Exceptions/NeedAuthenticationException.php',
         'OC\\AppFramework\\Middleware\\PublicShare\\PublicShareMiddleware' => __DIR__ . '/../../..' . '/lib/private/AppFramework/Middleware/PublicShare/PublicShareMiddleware.php',
diff --git a/lib/private/AppFramework/DependencyInjection/DIContainer.php b/lib/private/AppFramework/DependencyInjection/DIContainer.php
index 15ae8ab6b0b..82a2780eb27 100644
--- a/lib/private/AppFramework/DependencyInjection/DIContainer.php
+++ b/lib/private/AppFramework/DependencyInjection/DIContainer.php
@@ -188,6 +188,8 @@ class DIContainer extends SimpleContainer implements IAppContainer {
 				$c->query(OC\AppFramework\Middleware\CompressionMiddleware::class)
 			);
 
+			$dispatcher->registerMiddleware($c->query(OC\AppFramework\Middleware\NotModifiedMiddleware::class));
+
 			$dispatcher->registerMiddleware(
 				$c->query(OC\AppFramework\Middleware\Security\ReloadExecutionMiddleware::class)
 			);
diff --git a/lib/private/AppFramework/Http.php b/lib/private/AppFramework/Http.php
index 3c4a52fe37c..88e49816eb9 100644
--- a/lib/private/AppFramework/Http.php
+++ b/lib/private/AppFramework/Http.php
@@ -116,24 +116,7 @@ class Http extends BaseHttp {
 	 * @param string $ETag the etag
 	 * @return string
 	 */
-	public function getStatusHeader($status, \DateTime $lastModified=null,
-									$ETag=null) {
-		if (!is_null($lastModified)) {
-			$lastModified = $lastModified->format(\DateTime::RFC2822);
-		}
-
-		// if etag or lastmodified have not changed, return a not modified
-		if ((isset($this->server['HTTP_IF_NONE_MATCH'])
-			&& trim(trim($this->server['HTTP_IF_NONE_MATCH']), '"') === (string)$ETag)
-
-			||
-
-			(isset($this->server['HTTP_IF_MODIFIED_SINCE'])
-			&& trim($this->server['HTTP_IF_MODIFIED_SINCE']) ===
-				$lastModified)) {
-			$status = self::STATUS_NOT_MODIFIED;
-		}
-
+	public function getStatusHeader($status) {
 		// we have one change currently for the http 1.0 header that differs
 		// from 1.1: STATUS_TEMPORARY_REDIRECT should be STATUS_FOUND
 		// if this differs any more, we want to create childclasses for this
diff --git a/lib/private/AppFramework/Http/Dispatcher.php b/lib/private/AppFramework/Http/Dispatcher.php
index 629905e5da8..3892bb667f0 100644
--- a/lib/private/AppFramework/Http/Dispatcher.php
+++ b/lib/private/AppFramework/Http/Dispatcher.php
@@ -116,8 +116,7 @@ class Dispatcher {
 			$controller, $methodName, $response);
 
 		// depending on the cache object the headers need to be changed
-		$out[0] = $this->protocol->getStatusHeader($response->getStatus(),
-			$response->getLastModified(), $response->getETag());
+		$out[0] = $this->protocol->getStatusHeader($response->getStatus());
 		$out[1] = array_merge($response->getHeaders());
 		$out[2] = $response->getCookies();
 		$out[3] = $this->middlewareDispatcher->beforeOutput(
diff --git a/lib/private/AppFramework/Middleware/NotModifiedMiddleware.php b/lib/private/AppFramework/Middleware/NotModifiedMiddleware.php
new file mode 100644
index 00000000000..e34310b4116
--- /dev/null
+++ b/lib/private/AppFramework/Middleware/NotModifiedMiddleware.php
@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2020, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * 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
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OC\AppFramework\Middleware;
+
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\Response;
+use OCP\AppFramework\Middleware;
+use OCP\IRequest;
+
+class NotModifiedMiddleware extends Middleware {
+	/** @var IRequest */
+	private $request;
+
+	public function __construct(IRequest $request) {
+		$this->request = $request;
+	}
+
+	public function afterController($controller, $methodName, Response $response) {
+		$etagHeader = $this->request->getHeader('IF_NONE_MATCH');
+		if ($etagHeader !== '' && $response->getETag() !== null && trim($etagHeader) === '"' . $response->getETag() . '"') {
+			$response->setStatus(Http::STATUS_NOT_MODIFIED);
+			return $response;
+		}
+
+		$modifiedSinceHeader = $this->request->getHeader('IF_MODIFIED_SINCE');
+		if ($modifiedSinceHeader !== '' && $response->getLastModified() !== null && trim($modifiedSinceHeader) === $response->getLastModified()->format(\DateTime::RFC2822)) {
+			$response->setStatus(Http::STATUS_NOT_MODIFIED);
+			return $response;
+		}
+
+		return $response;
+	}
+}
diff --git a/tests/lib/AppFramework/Http/DispatcherTest.php b/tests/lib/AppFramework/Http/DispatcherTest.php
index 74dbf68c28a..c4c973aec90 100644
--- a/tests/lib/AppFramework/Http/DispatcherTest.php
+++ b/tests/lib/AppFramework/Http/DispatcherTest.php
@@ -181,19 +181,11 @@ class DispatcherTest extends \Test\TestCase {
 			->method('getStatus')
 			->willReturn(Http::STATUS_OK);
 		$this->response->expects($this->once())
-			->method('getLastModified')
-			->willReturn($this->lastModified);
-		$this->response->expects($this->once())
-			->method('getETag')
-			->willReturn($this->etag);
-		$this->response->expects($this->once())
 			->method('getHeaders')
 			->willReturn($responseHeaders);
 		$this->http->expects($this->once())
 			->method('getStatusHeader')
-			->with($this->equalTo(Http::STATUS_OK),
-				$this->equalTo($this->lastModified),
-				$this->equalTo($this->etag))
+			->with($this->equalTo(Http::STATUS_OK))
 			->willReturn($httpHeaders);
 
 		$this->middlewareDispatcher->expects($this->once())
diff --git a/tests/lib/AppFramework/Http/HttpTest.php b/tests/lib/AppFramework/Http/HttpTest.php
index 009bb39260d..d3d23425f7c 100644
--- a/tests/lib/AppFramework/Http/HttpTest.php
+++ b/tests/lib/AppFramework/Http/HttpTest.php
@@ -53,38 +53,6 @@ class HttpTest extends \Test\TestCase {
 		$this->assertEquals('HTTP/1.0 200 OK', $header);
 	}
 
-
-	public function testEtagMatchReturnsNotModified() {
-		$http = new Http(['HTTP_IF_NONE_MATCH' => 'hi']);
-
-		$header = $http->getStatusHeader(Http::STATUS_OK, null, 'hi');
-		$this->assertEquals('HTTP/1.1 304 Not Modified', $header);
-	}
-
-
-	public function testQuotedEtagMatchReturnsNotModified() {
-		$http = new Http(['HTTP_IF_NONE_MATCH' => '"hi"']);
-
-		$header = $http->getStatusHeader(Http::STATUS_OK, null, 'hi');
-		$this->assertEquals('HTTP/1.1 304 Not Modified', $header);
-	}
-
-
-	public function testLastModifiedMatchReturnsNotModified() {
-		$dateTime = new \DateTime(null, new \DateTimeZone('GMT'));
-		$dateTime->setTimestamp('12');
-
-		$http = new Http(
-			[
-				'HTTP_IF_MODIFIED_SINCE' => 'Thu, 01 Jan 1970 00:00:12 +0000']
-			);
-
-		$header = $http->getStatusHeader(Http::STATUS_OK, $dateTime);
-		$this->assertEquals('HTTP/1.1 304 Not Modified', $header);
-	}
-
-
-
 	public function testTempRedirectBecomesFoundInHttp10() {
 		$http = new Http([], 'HTTP/1.0');
 
diff --git a/tests/lib/AppFramework/Middleware/NotModifiedMiddlewareTest.php b/tests/lib/AppFramework/Middleware/NotModifiedMiddlewareTest.php
new file mode 100644
index 00000000000..89ae75bcac2
--- /dev/null
+++ b/tests/lib/AppFramework/Middleware/NotModifiedMiddlewareTest.php
@@ -0,0 +1,106 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2020, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * 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
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Test\AppFramework\Middleware;
+
+use OC\AppFramework\Middleware\NotModifiedMiddleware;
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http;
+use OCP\IRequest;
+
+class NotModifiedMiddlewareTest extends \Test\TestCase {
+
+	/** @var IRequest */
+	private $request;
+	/** @var Controller */
+	private $controller;
+	/** @var NotModifiedMiddleware */
+	private $middleWare;
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->request = $this->createMock(IRequest::class);
+		$this->middleWare = new NotModifiedMiddleware(
+			$this->request
+		);
+
+		$this->controller = $this->createMock(Controller::class);
+	}
+
+	public function dataModified(): array {
+		$now = new \DateTime();
+
+		return [
+			[null, '', null, '', false],
+			['etag', 'etag', null, '', false],
+			['etag', '"wrongetag"', null, '', false],
+			['etag', '', null, '', false],
+			[null, '"etag"', null, '', false],
+			['etag', '"etag"', null, '', true],
+
+			[null, '', $now, $now->format(\DateTime::RFC2822), true],
+			[null, '', $now, $now->format(\DateTime::ATOM), false],
+			[null, '', null, $now->format(\DateTime::RFC2822), false],
+			[null, '', $now, '', false],
+
+			['etag', '"etag"', $now, $now->format(\DateTime::ATOM), true],
+			['etag', '"etag"', $now, $now->format(\DateTime::RFC2822), true],
+		];
+	}
+
+	/**
+	 * @dataProvider dataModified
+	 */
+	public function testMiddleware(?string $etag, string $etagHeader, ?\DateTime $lastModified, string $lastModifiedHeader, bool $notModifiedSet) {
+		$this->request->method('getHeader')
+			->willReturnCallback(function (string $name) use ($etagHeader, $lastModifiedHeader) {
+				if ($name === 'IF_NONE_MATCH') {
+					return $etagHeader;
+				}
+				if ($name === 'IF_MODIFIED_SINCE') {
+					return $lastModifiedHeader;
+				}
+				return '';
+			});
+
+		$response = new Http\Response();
+		if ($etag !== null) {
+			$response->setETag($etag);
+		}
+		if ($lastModified !== null) {
+			$response->setLastModified($lastModified);
+		}
+		$response->setStatus(Http::STATUS_OK);
+
+		$result = $this->middleWare->afterController($this->controller, 'myfunction', $response);
+
+		if ($notModifiedSet) {
+			$this->assertSame(Http::STATUS_NOT_MODIFIED, $result->getStatus());
+		} else {
+			$this->assertSame(Http::STATUS_OK, $result->getStatus());
+		}
+	}
+}