Move DateTime::RFC2822 to DateTimeInterface::2822

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

apps/dav/lib/Provisioning/Apple/AppleProvisioningNode.php

@@ -76,7 +76,7 @@ class AppleProvisioningNode implements INode, IProperties {
 
 		return [
 			'{DAV:}getcontentlength' => 42,
-			'{DAV:}getlastmodified' => $datetime->format(\DateTime::RFC2822),
+			'{DAV:}getlastmodified' => $datetime->format(\DateTimeInterface::RFC2822),
 		];
 	}
 

lib/private/AppFramework/Middleware/NotModifiedMiddleware.php

@@ -46,7 +46,7 @@ class NotModifiedMiddleware extends Middleware {
 		}
 
 		$modifiedSinceHeader = $this->request->getHeader('IF_MODIFIED_SINCE');
-		if ($modifiedSinceHeader !== '' && $response->getLastModified() !== null && trim($modifiedSinceHeader) === $response->getLastModified()->format(\DateTime::RFC2822)) {
+		if ($modifiedSinceHeader !== '' && $response->getLastModified() !== null && trim($modifiedSinceHeader) === $response->getLastModified()->format(\DateTimeInterface::RFC2822)) {
 			$response->setStatus(Http::STATUS_NOT_MODIFIED);
 			return $response;
 		}

lib/private/Files/ObjectStore/S3Signature.php

@@ -129,7 +129,7 @@ class S3Signature implements SignatureInterface {
 	) {
 		$modify = [
 			'remove_headers' => ['X-Amz-Date'],
-			'set_headers' => ['Date' => gmdate(\DateTime::RFC2822)]
+			'set_headers' => ['Date' => gmdate(\DateTimeInterface::RFC2822)]
 		];
 
 		// Add the security token header if one is being used by the credentials

lib/public/AppFramework/Http/Response.php

@@ -115,7 +115,7 @@ class Response {
 			$time = \OC::$server->query(ITimeFactory::class);
 			$expires->setTimestamp($time->getTime());
 			$expires->add(new \DateInterval('PT'.$cacheSeconds.'S'));
-			$this->addHeader('Expires', $expires->format(\DateTime::RFC2822));
+			$this->addHeader('Expires', $expires->format(\DateTimeInterface::RFC2822));
 		} else {
 			$this->addHeader('Cache-Control', 'no-cache, no-store, must-revalidate');
 			unset($this->headers['Expires'], $this->headers['Pragma']);
@@ -244,7 +244,7 @@ class Response {
 
 		if ($this->lastModified) {
 			$mergeWith['Last-Modified'] =
-				$this->lastModified->format(\DateTime::RFC2822);
+				$this->lastModified->format(\DateTimeInterface::RFC2822);
 		}
 
 		$this->headers['Content-Security-Policy'] = $this->getContentSecurityPolicy()->buildPolicy();

tests/lib/AppFramework/Middleware/NotModifiedMiddlewareTest.php

@@ -61,13 +61,13 @@ class NotModifiedMiddlewareTest extends \Test\TestCase {
 			[null, '"etag"', null, '', false],
 			['etag', '"etag"', null, '', true],
 
-			[null, '', $now, $now->format(\DateTime::RFC2822), true],
+			[null, '', $now, $now->format(\DateTimeInterface::RFC2822), true],
 			[null, '', $now, $now->format(\DateTimeInterface::ATOM), false],
-			[null, '', null, $now->format(\DateTime::RFC2822), false],
+			[null, '', null, $now->format(\DateTimeInterface::RFC2822), false],
 			[null, '', $now, '', false],
 
 			['etag', '"etag"', $now, $now->format(\DateTimeInterface::ATOM), true],
-			['etag', '"etag"', $now, $now->format(\DateTime::RFC2822), true],
+			['etag', '"etag"', $now, $now->format(\DateTimeInterface::RFC2822), true],
 		];
 	}